From f6923226eba5540bd8cde96af91b679ddc4699ab Mon Sep 17 00:00:00 2001
From: Hans Petter Selasky <hselasky@FreeBSD.org>
Date: Fri, 10 Nov 2017 13:58:49 +0000
Subject: [PATCH] Add API function to query port performance counters for
 infiniband and RoCE traffic in mlx5 core.

Sponsored by:	Mellanox Technologies
MFC after:	1 week
---
 sys/dev/mlx5/mlx5_core/mlx5_vport.c | 22 ++++++++++++++++++++++
 sys/dev/mlx5/vport.h                |  2 ++
 2 files changed, 24 insertions(+)

diff --git a/sys/dev/mlx5/mlx5_core/mlx5_vport.c b/sys/dev/mlx5/mlx5_core/mlx5_vport.c
index 448e16fdb4f1..88ef505dbdf3 100644
--- a/sys/dev/mlx5/mlx5_core/mlx5_vport.c
+++ b/sys/dev/mlx5/mlx5_core/mlx5_vport.c
@@ -1757,3 +1757,25 @@ int mlx5_query_hca_vport_state(struct mlx5_core_dev *dev, u8 *vport_state)
 	return err;
 }
 EXPORT_SYMBOL_GPL(mlx5_query_hca_vport_state);
+
+int mlx5_core_query_ib_ppcnt(struct mlx5_core_dev *dev,
+			     u8 port_num, void *out, size_t sz)
+{
+	u32 *in;
+	int err;
+
+	in  = mlx5_vzalloc(sz);
+	if (!in) {
+		err = -ENOMEM;
+		return err;
+	}
+
+	MLX5_SET(ppcnt_reg, in, local_port, port_num);
+
+	MLX5_SET(ppcnt_reg, in, grp, MLX5_INFINIBAND_PORT_COUNTERS_GROUP);
+	err = mlx5_core_access_reg(dev, in, sz, out,
+				   sz, MLX5_REG_PPCNT, 0, 0);
+
+	kvfree(in);
+	return err;
+}
diff --git a/sys/dev/mlx5/vport.h b/sys/dev/mlx5/vport.h
index 32cfaaeb7da3..bb147e30a99f 100644
--- a/sys/dev/mlx5/vport.h
+++ b/sys/dev/mlx5/vport.h
@@ -143,4 +143,6 @@ int mlx5_query_vport_counter(struct mlx5_core_dev *dev,
 			     void *out, int out_size);
 int mlx5_get_vport_counters(struct mlx5_core_dev *dev, u8 port_num,
 			    struct mlx5_vport_counters *vc);
+int mlx5_core_query_ib_ppcnt(struct mlx5_core_dev *dev,
+			     u8 port_num, void *out, size_t sz);
 #endif /* __MLX5_VPORT_H__ */