net: dsa: mv88e6xxx: Monitor and Management tables

The mv88e6390 changes the monitor control register into the Monitor
and Management control, which is an indirection register to various
registers.

Add ops to set the CPU port and the ingress/egress port for both
register layouts, to global1
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/dsa/mv88e6xxx/global1.c

@@ -33,6 +33,75 @@ int mv88e6xxx_g1_wait(struct mv88e6xxx_chip *chip, int reg, u16 mask)
 	return mv88e6xxx_wait(chip, chip->info->global1_addr, reg, mask);
 }
 
+/* Offset 0x1a: Monitor Control */
+/* Offset 0x1a: Monitor & MGMT Control on some devices */
+
+int mv88e6095_g1_set_egress_port(struct mv88e6xxx_chip *chip, int port)
+{
+	u16 reg;
+	int err;
+
+	err = mv88e6xxx_g1_read(chip, GLOBAL_MONITOR_CONTROL, &reg);
+	if (err)
+		return err;
+
+	reg &= ~(GLOBAL_MONITOR_CONTROL_INGRESS_MASK |
+		 GLOBAL_MONITOR_CONTROL_EGRESS_MASK);
+
+	reg |= port << GLOBAL_MONITOR_CONTROL_INGRESS_SHIFT |
+		port << GLOBAL_MONITOR_CONTROL_EGRESS_SHIFT;
+
+	return mv88e6xxx_g1_write(chip, GLOBAL_MONITOR_CONTROL, reg);
+}
+
+/* Older generations also call this the ARP destination. It has been
+ * generalized in more modern devices such that more than ARP can
+ * egress it
+ */
+int mv88e6095_g1_set_cpu_port(struct mv88e6xxx_chip *chip, int port)
+{
+	u16 reg;
+	int err;
+
+	err = mv88e6xxx_g1_read(chip, GLOBAL_MONITOR_CONTROL, &reg);
+	if (err)
+		return err;
+
+	reg &= ~GLOBAL_MONITOR_CONTROL_ARP_MASK;
+	reg |= port << GLOBAL_MONITOR_CONTROL_ARP_SHIFT;
+
+	return mv88e6xxx_g1_write(chip, GLOBAL_MONITOR_CONTROL, reg);
+}
+
+static int mv88e6390_g1_monitor_write(struct mv88e6xxx_chip *chip,
+				      u16 pointer, u8 data)
+{
+	u16 reg;
+
+	reg = GLOBAL_MONITOR_CONTROL_UPDATE | pointer | data;
+
+	return mv88e6xxx_g1_write(chip, GLOBAL_MONITOR_CONTROL, reg);
+}
+
+int mv88e6390_g1_set_egress_port(struct mv88e6xxx_chip *chip, int port)
+{
+	int err;
+
+	err = mv88e6390_g1_monitor_write(chip, GLOBAL_MONITOR_CONTROL_INGRESS,
+					 port);
+	if (err)
+		return err;
+
+	return mv88e6390_g1_monitor_write(chip, GLOBAL_MONITOR_CONTROL_EGRESS,
+					  port);
+}
+
+int mv88e6390_g1_set_cpu_port(struct mv88e6xxx_chip *chip, int port)
+{
+	return mv88e6390_g1_monitor_write(chip, GLOBAL_MONITOR_CONTROL_CPU_DEST,
+					  port);
+}
+
 /* Offset 0x1c: Global Control 2 */
 
 int mv88e6390_g1_stats_set_histogram(struct mv88e6xxx_chip *chip)

drivers/net/dsa/mv88e6xxx/global1.h

@@ -25,5 +25,9 @@ int mv88e6320_g1_stats_snapshot(struct mv88e6xxx_chip *chip, int port);
 int mv88e6390_g1_stats_snapshot(struct mv88e6xxx_chip *chip, int port);
 int mv88e6390_g1_stats_set_histogram(struct mv88e6xxx_chip *chip);
 void mv88e6xxx_g1_stats_read(struct mv88e6xxx_chip *chip, int stat, u32 *val);
+int mv88e6095_g1_set_egress_port(struct mv88e6xxx_chip *chip, int port);
+int mv88e6390_g1_set_egress_port(struct mv88e6xxx_chip *chip, int port);
+int mv88e6095_g1_set_cpu_port(struct mv88e6xxx_chip *chip, int port);
+int mv88e6390_g1_set_cpu_port(struct mv88e6xxx_chip *chip, int port);
 
 #endif /* _MV88E6XXX_GLOBAL1_H */

drivers/net/dsa/mv88e6xxx/mv88e6xxx.h

@@ -287,10 +287,21 @@
 #define GLOBAL_CORE_TAG_TYPE	0x19
 #define GLOBAL_MONITOR_CONTROL	0x1a
 #define GLOBAL_MONITOR_CONTROL_INGRESS_SHIFT	12
+#define GLOBAL_MONITOR_CONTROL_INGRESS_MASK	(0xf << 12)
 #define GLOBAL_MONITOR_CONTROL_EGRESS_SHIFT	8
+#define GLOBAL_MONITOR_CONTROL_EGRESS_MASK	(0xf << 8)
 #define GLOBAL_MONITOR_CONTROL_ARP_SHIFT	4
+#define GLOBAL_MONITOR_CONTROL_ARP_MASK	        (0xf << 4)
 #define GLOBAL_MONITOR_CONTROL_MIRROR_SHIFT	0
 #define GLOBAL_MONITOR_CONTROL_ARP_DISABLED	(0xf0)
+#define GLOBAL_MONITOR_CONTROL_UPDATE			BIT(15)
+#define GLOBAL_MONITOR_CONTROL_0180C280000000XLO	(0x00 << 8)
+#define GLOBAL_MONITOR_CONTROL_0180C280000000XHI	(0x01 << 8)
+#define GLOBAL_MONITOR_CONTROL_0180C280000002XLO	(0x02 << 8)
+#define GLOBAL_MONITOR_CONTROL_0180C280000002XHI	(0x03 << 8)
+#define GLOBAL_MONITOR_CONTROL_INGRESS			(0x20 << 8)
+#define GLOBAL_MONITOR_CONTROL_EGRESS			(0x21 << 8)
+#define GLOBAL_MONITOR_CONTROL_CPU_DEST			(0x30 << 8)
 #define GLOBAL_CONTROL_2	0x1c
 #define GLOBAL_CONTROL_2_NO_CASCADE		0xe000
 #define GLOBAL_CONTROL_2_MULTIPLE_CASCADE	0xf000
@@ -827,6 +838,8 @@ struct mv88e6xxx_ops {
 	void (*stats_get_strings)(struct mv88e6xxx_chip *chip,  uint8_t *data);
 	void (*stats_get_stats)(struct mv88e6xxx_chip *chip,  int port,
 				uint64_t *data);
+	int (*g1_set_cpu_port)(struct mv88e6xxx_chip *chip, int port);
+	int (*g1_set_egress_port)(struct mv88e6xxx_chip *chip, int port);
 };
 
 #define STATS_TYPE_PORT		BIT(0)