mlxsw: spectrum_acl: Add C-TCAM spill tracepoint

Add some visibility to the rule addition process and trace whenever rule
spilled into C-TCAM.

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>

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_atcam.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_atcam.c
index cda0a71..a74a390 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_atcam.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_atcam.c
@@ -7,6 +7,8 @@
 #include <linux/gfp.h>
 #include <linux/refcount.h>
 #include <linux/rhashtable.h>
+#define CREATE_TRACE_POINTS
+#include <trace/events/mlxsw.h>
 
 #include "reg.h"
 #include "core.h"
@@ -578,6 +580,7 @@ int mlxsw_sp_acl_atcam_entry_add(struct mlxsw_sp *mlxsw_sp,
        /* It is possible we failed to add the rule to the A-TCAM due to
         * exceeded number of masks. Try to spill into C-TCAM.
         */
+       trace_mlxsw_sp_acl_atcam_entry_add_ctcam_spill(mlxsw_sp, aregion);
        err = mlxsw_sp_acl_ctcam_entry_add(mlxsw_sp, &aregion->cregion,
                                           &achunk->cchunk, &aentry->centry,
                                           rulei, true);

diff --git a/include/trace/events/mlxsw.h b/include/trace/events/mlxsw.h
new file mode 100644 (file)
index 0000000..6c2bafc
--- /dev/null
+++ b/include/trace/events/mlxsw.h
@@ -0,0 +1,38 @@
+/* SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 */
+/* Copyright (c) 2019 Mellanox Technologies. All rights reserved */
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM mlxsw
+
+#if !defined(_MLXSW_TRACEPOINT_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _MLXSW_TRACEPOINT_H
+
+#include <linux/tracepoint.h>
+
+struct mlxsw_sp;
+struct mlxsw_sp_acl_atcam_region;
+
+TRACE_EVENT(mlxsw_sp_acl_atcam_entry_add_ctcam_spill,
+       TP_PROTO(const struct mlxsw_sp *mlxsw_sp,
+                const struct mlxsw_sp_acl_atcam_region *aregion),
+
+       TP_ARGS(mlxsw_sp, aregion),
+
+       TP_STRUCT__entry(
+               __field(const void *, mlxsw_sp)
+               __field(const void *, aregion)
+       ),
+
+       TP_fast_assign(
+               __entry->mlxsw_sp = mlxsw_sp;
+               __entry->aregion = aregion;
+       ),
+
+       TP_printk("mlxsw_sp %p, aregion %p",
+                 __entry->mlxsw_sp, __entry->aregion)
+);
+
+#endif /* _MLXSW_TRACEPOINT_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>