mlxsw: spectrum_acl: Add couple of vregion rehash tracepoints

As vregion rehash is happening in delayed work, add some visibility to
the process using a few tracepoints.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_tcam.c

@@ -8,6 +8,7 @@
 #include <linux/list.h>
 #include <linux/rhashtable.h>
 #include <linux/netdevice.h>
+#include <trace/events/mlxsw.h>
 
 #include "reg.h"
 #include "core.h"
@@ -1175,6 +1176,8 @@ mlxsw_sp_acl_tcam_vregion_migrate(struct mlxsw_sp *mlxsw_sp,
 	struct mlxsw_sp_acl_tcam_region *region2, *unused_region;
 	int err;
 
+	trace_mlxsw_sp_acl_tcam_vregion_migrate(mlxsw_sp, vregion);
+
 	region2 = mlxsw_sp_acl_tcam_region_create(mlxsw_sp, vregion->tcam,
 						  vregion, hints_priv);
 	if (IS_ERR(region2))
@@ -1219,6 +1222,7 @@ mlxsw_sp_acl_tcam_vregion_rehash(struct mlxsw_sp *mlxsw_sp,
 	void *hints_priv;
 	int err;
 
+	trace_mlxsw_sp_acl_tcam_vregion_rehash(mlxsw_sp, vregion);
 	if (vregion->failed_rollback)
 		return -EBUSY;
 
@@ -1233,9 +1237,12 @@ mlxsw_sp_acl_tcam_vregion_rehash(struct mlxsw_sp *mlxsw_sp,
 	err = mlxsw_sp_acl_tcam_vregion_migrate(mlxsw_sp, vregion, hints_priv);
 	if (err) {
 		dev_err(mlxsw_sp->bus_info->dev, "Failed to migrate vregion\n");
-		if (vregion->failed_rollback)
+		if (vregion->failed_rollback) {
+			trace_mlxsw_sp_acl_tcam_vregion_rehash_dis(mlxsw_sp,
+								   vregion);
 			dev_err(mlxsw_sp->bus_info->dev, "Failed to rollback during vregion migration fail\n");
 		}
+	}
 
 	ops->region_rehash_hints_put(hints_priv);
 	return err;

include/trace/events/mlxsw.h

@@ -11,6 +11,7 @@
 
 struct mlxsw_sp;
 struct mlxsw_sp_acl_atcam_region;
+struct mlxsw_sp_acl_tcam_vregion;
 
 TRACE_EVENT(mlxsw_sp_acl_atcam_entry_add_ctcam_spill,
 	TP_PROTO(const struct mlxsw_sp *mlxsw_sp,
@@ -32,6 +33,66 @@ TRACE_EVENT(mlxsw_sp_acl_atcam_entry_add_ctcam_spill,
 		  __entry->mlxsw_sp, __entry->aregion)
 );
 
+TRACE_EVENT(mlxsw_sp_acl_tcam_vregion_rehash,
+	TP_PROTO(const struct mlxsw_sp *mlxsw_sp,
+		 const struct mlxsw_sp_acl_tcam_vregion *vregion),
+
+	TP_ARGS(mlxsw_sp, vregion),
+
+	TP_STRUCT__entry(
+		__field(const void *, mlxsw_sp)
+		__field(const void *, vregion)
+	),
+
+	TP_fast_assign(
+		__entry->mlxsw_sp = mlxsw_sp;
+		__entry->vregion = vregion;
+	),
+
+	TP_printk("mlxsw_sp %p, vregion %p",
+		  __entry->mlxsw_sp, __entry->vregion)
+);
+
+TRACE_EVENT(mlxsw_sp_acl_tcam_vregion_migrate,
+	TP_PROTO(const struct mlxsw_sp *mlxsw_sp,
+		 const struct mlxsw_sp_acl_tcam_vregion *vregion),
+
+	TP_ARGS(mlxsw_sp, vregion),
+
+	TP_STRUCT__entry(
+		__field(const void *, mlxsw_sp)
+		__field(const void *, vregion)
+	),
+
+	TP_fast_assign(
+		__entry->mlxsw_sp = mlxsw_sp;
+		__entry->vregion = vregion;
+	),
+
+	TP_printk("mlxsw_sp %p, vregion %p",
+		  __entry->mlxsw_sp, __entry->vregion)
+);
+
+TRACE_EVENT(mlxsw_sp_acl_tcam_vregion_rehash_dis,
+	TP_PROTO(const struct mlxsw_sp *mlxsw_sp,
+		 const struct mlxsw_sp_acl_tcam_vregion *vregion),
+
+	TP_ARGS(mlxsw_sp, vregion),
+
+	TP_STRUCT__entry(
+		__field(const void *, mlxsw_sp)
+		__field(const void *, vregion)
+	),
+
+	TP_fast_assign(
+		__entry->mlxsw_sp = mlxsw_sp;
+		__entry->vregion = vregion;
+	),
+
+	TP_printk("mlxsw_sp %p, vregion %p",
+		  __entry->mlxsw_sp, __entry->vregion)
+);
+
 #endif /* _MLXSW_TRACEPOINT_H */
 
 /* This part must be outside protection */