svn commit: r347733 - stable/12/sys/dev/mlx5/mlx5_core

[Hans Petter Selasky]

Author: hselasky
Date: Thu May 16 15:58:37 2019
New Revision: 347733
URL: https://svnweb.freebsd.org/changeset/base/347733

Log:
  MFC r347269:
  Add sysctl(8) to control fast unload support in mlx5core.
  
  Sponsored by:	Mellanox Technologies

Modified:
  stable/12/sys/dev/mlx5/mlx5_core/mlx5_main.c
Directory Properties:
  stable/12/   (props changed)

Modified: stable/12/sys/dev/mlx5/mlx5_core/mlx5_main.c
==============================================================================
--- stable/12/sys/dev/mlx5/mlx5_core/mlx5_main.c	Thu May 16 15:57:59 2019	(r347732)
+++ stable/12/sys/dev/mlx5/mlx5_core/mlx5_main.c	Thu May 16 15:58:37 2019	(r347733)
@@ -1,5 +1,5 @@
 /*-
- * Copyright (c) 2013-2017, Mellanox Technologies, Ltd.  All rights reserved.
+ * Copyright (c) 2013-2019, Mellanox Technologies, Ltd.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -68,6 +68,11 @@ MODULE_PARM_DESC(prof_sel, "profile selector. Valid ra
 
 SYSCTL_NODE(_hw, OID_AUTO, mlx5, CTLFLAG_RW, 0, "mlx5 HW controls");
 
+static int mlx5_fast_unload_enabled = 1;
+SYSCTL_INT(_hw_mlx5, OID_AUTO, fast_unload_enabled, CTLFLAG_RWTUN,
+    &mlx5_fast_unload_enabled, 0,
+    "Set to enable fast unload. Clear to disable.");
+
 #define NUMA_NO_NODE       -1
 
 static LIST_HEAD(intf_list);
@@ -1417,6 +1422,11 @@ static int mlx5_try_fast_unload(struct mlx5_core_dev *
 {
 	bool fast_teardown, force_teardown;
 	int err;
+
+	if (!mlx5_fast_unload_enabled) {
+		mlx5_core_dbg(dev, "fast unload is disabled by user\n");
+		return -EOPNOTSUPP;
+	}
 
 	fast_teardown = MLX5_CAP_GEN(dev, fast_teardown);
 	force_teardown = MLX5_CAP_GEN(dev, force_teardown);