From 3b2c0bbc52e5a06de8f896cd379ce252602d9560 Mon Sep 17 00:00:00 2001
From: Viacheslav Ovsiienko <viacheslavo@mellanox.com>
Date: Tue, 23 Oct 2018 10:04:14 +0000
Subject: [PATCH] net/mlx5: add new flow counter Verbs API to glue library

This patch updates the mlx5 glue library, new counter support
Verbs function pointers are added to the glue linking structure
mlx5_glue. This structure now contains the pointers to the both
versions of counter supporting functions due to compatibility
issues. Depending on configuration macros the functions perform
actual Verbs library calls or return an error with meaning
"feature is not supported" (NULL or ENOTSUP).

Signed-off-by: Viacheslav Ovsiienko <viacheslavo@mellanox.com>
---
 drivers/net/mlx5/mlx5_glue.c | 60 ++++++++++++++++++++++++++++++++++++
 drivers/net/mlx5/mlx5_glue.h | 17 ++++++++++
 2 files changed, 77 insertions(+)

diff --git a/drivers/net/mlx5/mlx5_glue.c b/drivers/net/mlx5/mlx5_glue.c
index 889e074806..1afb114f88 100644
--- a/drivers/net/mlx5/mlx5_glue.c
+++ b/drivers/net/mlx5/mlx5_glue.c
@@ -263,6 +263,62 @@ mlx5_glue_query_counter_set(struct ibv_query_counter_set_attr *query_attr,
 #endif
 }
 
+static struct ibv_counters *
+mlx5_glue_create_counters(struct ibv_context *context,
+			  struct ibv_counters_init_attr *init_attr)
+{
+#ifndef HAVE_IBV_DEVICE_COUNTERS_SET_V45
+	(void)context;
+	(void)init_attr;
+	return NULL;
+#else
+	return ibv_create_counters(context, init_attr);
+#endif
+}
+
+static int
+mlx5_glue_destroy_counters(struct ibv_counters *counters)
+{
+#ifndef HAVE_IBV_DEVICE_COUNTERS_SET_V45
+	(void)counters;
+	return ENOTSUP;
+#else
+	return ibv_destroy_counters(counters);
+#endif
+}
+
+static int
+mlx5_glue_attach_counters(struct ibv_counters *counters,
+			  struct ibv_counter_attach_attr *attr,
+			  struct ibv_flow *flow)
+{
+#ifndef HAVE_IBV_DEVICE_COUNTERS_SET_V45
+	(void)counters;
+	(void)attr;
+	(void)flow;
+	return ENOTSUP;
+#else
+	return ibv_attach_counters_point_flow(counters, attr, flow);
+#endif
+}
+
+static int
+mlx5_glue_query_counters(struct ibv_counters *counters,
+			 uint64_t *counters_value,
+			 uint32_t ncounters,
+			 uint32_t flags)
+{
+#ifndef HAVE_IBV_DEVICE_COUNTERS_SET_V45
+	(void)counters;
+	(void)counters_value;
+	(void)ncounters;
+	(void)flags;
+	return ENOTSUP;
+#else
+	return ibv_read_counters(counters, counters_value, ncounters, flags);
+#endif
+}
+
 static void
 mlx5_glue_ack_async_event(struct ibv_async_event *event)
 {
@@ -424,6 +480,10 @@ const struct mlx5_glue *mlx5_glue = &(const struct mlx5_glue){
 	.destroy_counter_set = mlx5_glue_destroy_counter_set,
 	.describe_counter_set = mlx5_glue_describe_counter_set,
 	.query_counter_set = mlx5_glue_query_counter_set,
+	.create_counters = mlx5_glue_create_counters,
+	.destroy_counters = mlx5_glue_destroy_counters,
+	.attach_counters = mlx5_glue_attach_counters,
+	.query_counters = mlx5_glue_query_counters,
 	.ack_async_event = mlx5_glue_ack_async_event,
 	.get_async_event = mlx5_glue_get_async_event,
 	.port_state_str = mlx5_glue_port_state_str,
diff --git a/drivers/net/mlx5/mlx5_glue.h b/drivers/net/mlx5/mlx5_glue.h
index adee972790..44bfefedb2 100644
--- a/drivers/net/mlx5/mlx5_glue.h
+++ b/drivers/net/mlx5/mlx5_glue.h
@@ -31,6 +31,12 @@ struct ibv_counter_set_init_attr;
 struct ibv_query_counter_set_attr;
 #endif
 
+#ifndef HAVE_IBV_DEVICE_COUNTERS_SET_V45
+struct ibv_counters;
+struct ibv_counters_init_attr;
+struct ibv_counter_attach_attr;
+#endif
+
 #ifndef HAVE_IBV_DEVICE_TUNNEL_SUPPORT
 struct mlx5dv_qp_init_attr;
 #endif
@@ -106,6 +112,17 @@ struct mlx5_glue {
 		 struct ibv_counter_set_description *cs_desc);
 	int (*query_counter_set)(struct ibv_query_counter_set_attr *query_attr,
 				 struct ibv_counter_set_data *cs_data);
+	struct ibv_counters *(*create_counters)
+		(struct ibv_context *context,
+		 struct ibv_counters_init_attr *init_attr);
+	int (*destroy_counters)(struct ibv_counters *counters);
+	int (*attach_counters)(struct ibv_counters *counters,
+			       struct ibv_counter_attach_attr *attr,
+			       struct ibv_flow *flow);
+	int (*query_counters)(struct ibv_counters *counters,
+			      uint64_t *counters_value,
+			      uint32_t ncounters,
+			      uint32_t flags);
 	void (*ack_async_event)(struct ibv_async_event *event);
 	int (*get_async_event)(struct ibv_context *context,
 			       struct ibv_async_event *event);
-- 
2.20.1