IB/mlx5: Add np_min_time_between_cnps and rp_max_rate debug params

Add two debugfs parameters described below.

np_min_time_between_cnps - Minimum time between sending CNPs from the
                           port.
                           Unit = microseconds.
                           Default = 0 (no min wait time; generated
                           based on incoming ECN marked packets).

rp_max_rate - Maximum rate at which reaction point node can transmit.
              Once this limit is reached, RP is no longer rate limited.
              Unit = Mbits/sec
              Default = 0 (full speed)

Link: https://lore.kernel.org/r/20200227125246.99472-1-leon@kernel.orgSigned-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/hw/mlx5/cong.c

@@ -47,6 +47,7 @@ static const char * const mlx5_ib_dbg_cc_name[] = {
 	"rp_byte_reset",
 	"rp_threshold",
 	"rp_ai_rate",
+	"rp_max_rate",
 	"rp_hai_rate",
 	"rp_min_dec_fac",
 	"rp_min_rate",
@@ -56,6 +57,7 @@ static const char * const mlx5_ib_dbg_cc_name[] = {
 	"rp_rate_reduce_monitor_period",
 	"rp_initial_alpha_value",
 	"rp_gd",
+	"np_min_time_between_cnps",
 	"np_cnp_dscp",
 	"np_cnp_prio_mode",
 	"np_cnp_prio",
@@ -66,6 +68,7 @@ static const char * const mlx5_ib_dbg_cc_name[] = {
 #define MLX5_IB_RP_TIME_RESET_ATTR			BIT(3)
 #define MLX5_IB_RP_BYTE_RESET_ATTR			BIT(4)
 #define MLX5_IB_RP_THRESHOLD_ATTR			BIT(5)
+#define MLX5_IB_RP_MAX_RATE_ATTR			BIT(6)
 #define MLX5_IB_RP_AI_RATE_ATTR				BIT(7)
 #define MLX5_IB_RP_HAI_RATE_ATTR			BIT(8)
 #define MLX5_IB_RP_MIN_DEC_FAC_ATTR			BIT(9)
@@ -77,6 +80,7 @@ static const char * const mlx5_ib_dbg_cc_name[] = {
 #define MLX5_IB_RP_INITIAL_ALPHA_VALUE_ATTR		BIT(15)
 #define MLX5_IB_RP_GD_ATTR				BIT(16)
 
+#define MLX5_IB_NP_MIN_TIME_BETWEEN_CNPS_ATTR		BIT(2)
 #define MLX5_IB_NP_CNP_DSCP_ATTR			BIT(3)
 #define MLX5_IB_NP_CNP_PRIO_MODE_ATTR			BIT(4)
 
@@ -111,6 +115,9 @@ static u32 mlx5_get_cc_param_val(void *field, int offset)
 	case MLX5_IB_DBG_CC_RP_AI_RATE:
 		return MLX5_GET(cong_control_r_roce_ecn_rp, field,
 				rpg_ai_rate);
+	case MLX5_IB_DBG_CC_RP_MAX_RATE:
+		return MLX5_GET(cong_control_r_roce_ecn_rp, field,
+				rpg_max_rate);
 	case MLX5_IB_DBG_CC_RP_HAI_RATE:
 		return MLX5_GET(cong_control_r_roce_ecn_rp, field,
 				rpg_hai_rate);
@@ -138,6 +145,9 @@ static u32 mlx5_get_cc_param_val(void *field, int offset)
 	case MLX5_IB_DBG_CC_RP_GD:
 		return MLX5_GET(cong_control_r_roce_ecn_rp, field,
 				rpg_gd);
+	case MLX5_IB_DBG_CC_NP_MIN_TIME_BETWEEN_CNPS:
+		return MLX5_GET(cong_control_r_roce_ecn_np, field,
+				min_time_between_cnps);
 	case MLX5_IB_DBG_CC_NP_CNP_DSCP:
 		return MLX5_GET(cong_control_r_roce_ecn_np, field,
 				cnp_dscp);
@@ -186,6 +196,11 @@ static void mlx5_ib_set_cc_param_mask_val(void *field, int offset,
 		MLX5_SET(cong_control_r_roce_ecn_rp, field,
 			 rpg_ai_rate, var);
 		break;
+	case MLX5_IB_DBG_CC_RP_MAX_RATE:
+		*attr_mask |= MLX5_IB_RP_MAX_RATE_ATTR;
+		MLX5_SET(cong_control_r_roce_ecn_rp, field,
+			 rpg_max_rate, var);
+		break;
 	case MLX5_IB_DBG_CC_RP_HAI_RATE:
 		*attr_mask |= MLX5_IB_RP_HAI_RATE_ATTR;
 		MLX5_SET(cong_control_r_roce_ecn_rp, field,
@@ -231,6 +246,11 @@ static void mlx5_ib_set_cc_param_mask_val(void *field, int offset,
 		MLX5_SET(cong_control_r_roce_ecn_rp, field,
 			 rpg_gd, var);
 		break;
+	case MLX5_IB_DBG_CC_NP_MIN_TIME_BETWEEN_CNPS:
+		*attr_mask |= MLX5_IB_NP_MIN_TIME_BETWEEN_CNPS_ATTR;
+		MLX5_SET(cong_control_r_roce_ecn_np, field,
+			 min_time_between_cnps, var);
+		break;
 	case MLX5_IB_DBG_CC_NP_CNP_DSCP:
 		*attr_mask |= MLX5_IB_NP_CNP_DSCP_ATTR;
 		MLX5_SET(cong_control_r_roce_ecn_np, field, cnp_dscp, var);

drivers/infiniband/hw/mlx5/mlx5_ib.h

@@ -792,6 +792,7 @@ enum mlx5_ib_dbg_cc_types {
 	MLX5_IB_DBG_CC_RP_BYTE_RESET,
 	MLX5_IB_DBG_CC_RP_THRESHOLD,
 	MLX5_IB_DBG_CC_RP_AI_RATE,
+	MLX5_IB_DBG_CC_RP_MAX_RATE,
 	MLX5_IB_DBG_CC_RP_HAI_RATE,
 	MLX5_IB_DBG_CC_RP_MIN_DEC_FAC,
 	MLX5_IB_DBG_CC_RP_MIN_RATE,
@@ -801,6 +802,7 @@ enum mlx5_ib_dbg_cc_types {
 	MLX5_IB_DBG_CC_RP_RATE_REDUCE_MONITOR_PERIOD,
 	MLX5_IB_DBG_CC_RP_INITIAL_ALPHA_VALUE,
 	MLX5_IB_DBG_CC_RP_GD,
+	MLX5_IB_DBG_CC_NP_MIN_TIME_BETWEEN_CNPS,
 	MLX5_IB_DBG_CC_NP_CNP_DSCP,
 	MLX5_IB_DBG_CC_NP_CNP_PRIO_MODE,
 	MLX5_IB_DBG_CC_NP_CNP_PRIO,