net: prestera: add counter HW API

Add counter API for getting HW statistics.

- HW statistics gathered by this API are deleyed.
- Batch of conters is supported.
- acl stat is supported.

Co-developed-by: Serhiy Boiko <serhiy.boiko@marvell.com>
Signed-off-by: Serhiy Boiko <serhiy.boiko@marvell.com>
Signed-off-by: Volodymyr Mytnyk <vmytnyk@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/marvell/prestera/Makefile

@@ -3,6 +3,6 @@ obj-$(CONFIG_PRESTERA)	+= prestera.o
 prestera-objs		:= prestera_main.o prestera_hw.o prestera_dsa.o \
 			   prestera_rxtx.o prestera_devlink.o prestera_ethtool.o \
 			   prestera_switchdev.o prestera_acl.o prestera_flow.o \
-			   prestera_flower.o prestera_span.o
+			   prestera_flower.o prestera_span.o prestera_counter.o
 
 obj-$(CONFIG_PRESTERA_PCI)	+= prestera_pci.o

drivers/net/ethernet/marvell/prestera/prestera.h

@@ -248,6 +248,7 @@ struct prestera_switch {
 	u32 mtu_max;
 	u8 id;
 	struct prestera_lag *lags;
+	struct prestera_counter *counter;
 	u8 lag_member_max;
 	u8 lag_max;
 };

drivers/net/ethernet/marvell/prestera/prestera_acl.h

@@ -60,13 +60,20 @@ struct prestera_acl_match {
 	__be32 mask[__PRESTERA_ACL_RULE_MATCH_TYPE_MAX];
 };
 
+struct prestera_acl_action_count {
+	u32 id;
+};
+
 struct prestera_acl_rule_entry_key {
 	u32 prio;
 	struct prestera_acl_match match;
 };
 
 struct prestera_acl_hw_action_info {
 	enum prestera_acl_rule_action id;
+	union {
+		struct prestera_acl_action_count count;
+	};
 };
 
 /* This struct (arg) used only to be passed as parameter for