mlx4_core: Add module parameter to enable QoS support
Add a module parameter "enable_qos" to mlx4_core. If this param is
set, enable support for QoS in the INIT_HCA command. By default, the
parameter is set to 0 (disabled).
Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
diff --git a/drivers/net/mlx4/fw.c b/drivers/net/mlx4/fw.c
index 2b5006b..0851ebd 100644
--- a/drivers/net/mlx4/fw.c
+++ b/drivers/net/mlx4/fw.c
@@ -46,6 +46,10 @@
extern void __buggy_use_of_MLX4_GET(void);
extern void __buggy_use_of_MLX4_PUT(void);
+static int enable_qos;
+module_param(enable_qos, bool, 0444);
+MODULE_PARM_DESC(enable_qos, "Enable Quality of Service support in the HCA (default: off)");
+
#define MLX4_GET(dest, source, offset) \
do { \
void *__p = (char *) (source) + (offset); \
@@ -737,6 +741,10 @@
if (dev->caps.flags & MLX4_DEV_CAP_FLAG_IPOIB_CSUM)
*(inbox + INIT_HCA_FLAGS_OFFSET / 4) |= cpu_to_be32(1 << 3);
+ /* Enable QoS support if module parameter set */
+ if (enable_qos)
+ *(inbox + INIT_HCA_FLAGS_OFFSET / 4) |= cpu_to_be32(1 << 2);
+
/* QPC/EEC/CQC/EQC/RDMARC attributes */
MLX4_PUT(inbox, param->qpc_base, INIT_HCA_QPC_BASE_OFFSET);