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IB/mlx5: Extend debug control for CC parameters

Browse source 
This patch adds rtt_resp_dscp to the current debug controllability of
congestion control (CC) parameters.
rtt_resp_dscp can be read or written through debugfs.
If set, its value overwrites the DSCP of the generated RTT response.

Signed-off-by: Edward Srouji <edwards@nvidia.com>
Reviewed-by: Maor Gottlieb <maorg@nvidia.com>
Link: https://lore.kernel.org/r/1dcc3440ee53c688f19f579a051ded81a2aaa70a.1676538714.git.leon@kernel.org
Signed-off-by: Leon Romanovsky <leon@kernel.org>
This commit is contained in:
Edward Srouji 2023-02-16 11:13:45 +02:00 committed by Leon Romanovsky
parent fd8958efe8
commit 66fb1d5df6
3 changed files with 39 additions and 3 deletions
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28
drivers/infiniband/hw/mlx5/cong.c
View file

@ -38,6 +38,7 @@
enum mlx5_ib_cong_node_type {
MLX5_IB_RROCE_ECN_RP = 1,
MLX5_IB_RROCE_ECN_NP = 2,
MLX5_IB_RROCE_GENERAL = 3,
};
static const char * const mlx5_ib_dbg_cc_name[] = {
@ -61,6 +62,8 @@ static const char * const mlx5_ib_dbg_cc_name[] = {
"np_cnp_dscp",
"np_cnp_prio_mode",
"np_cnp_prio",
"rtt_resp_dscp_valid",
"rtt_resp_dscp",
};
#define MLX5_IB_RP_CLAMP_TGT_RATE_ATTR BIT(1)
@ -84,14 +87,18 @@ static const char * const mlx5_ib_dbg_cc_name[] = {
#define MLX5_IB_NP_CNP_DSCP_ATTR BIT(3)
#define MLX5_IB_NP_CNP_PRIO_MODE_ATTR BIT(4)
#define MLX5_IB_GENERAL_RTT_RESP_DSCP_ATTR BIT(0)
static enum mlx5_ib_cong_node_type
mlx5_ib_param_to_node(enum mlx5_ib_dbg_cc_types param_offset)
{
if (param_offset >= MLX5_IB_DBG_CC_RP_CLAMP_TGT_RATE &&
param_offset <= MLX5_IB_DBG_CC_RP_GD)
if (param_offset <= MLX5_IB_DBG_CC_RP_GD)
return MLX5_IB_RROCE_ECN_RP;
else
if (param_offset <= MLX5_IB_DBG_CC_NP_CNP_PRIO)
return MLX5_IB_RROCE_ECN_NP;
return MLX5_IB_RROCE_GENERAL;
}
static u32 mlx5_get_cc_param_val(void *field, int offset)
@ -157,6 +164,12 @@ static u32 mlx5_get_cc_param_val(void *field, int offset)
case MLX5_IB_DBG_CC_NP_CNP_PRIO:
return MLX5_GET(cong_control_r_roce_ecn_np, field,
cnp_802p_prio);
case MLX5_IB_DBG_CC_GENERAL_RTT_RESP_DSCP_VALID:
return MLX5_GET(cong_control_r_roce_general, field,
rtt_resp_dscp_valid);
case MLX5_IB_DBG_CC_GENERAL_RTT_RESP_DSCP:
return MLX5_GET(cong_control_r_roce_general, field,
rtt_resp_dscp);
default:
return 0;
}
@ -264,6 +277,15 @@ static void mlx5_ib_set_cc_param_mask_val(void *field, int offset,
MLX5_SET(cong_control_r_roce_ecn_np, field, cnp_prio_mode, 0);
MLX5_SET(cong_control_r_roce_ecn_np, field, cnp_802p_prio, var);
break;
case MLX5_IB_DBG_CC_GENERAL_RTT_RESP_DSCP_VALID:
*attr_mask |= MLX5_IB_GENERAL_RTT_RESP_DSCP_ATTR;
MLX5_SET(cong_control_r_roce_general, field, rtt_resp_dscp_valid, var);
break;
case MLX5_IB_DBG_CC_GENERAL_RTT_RESP_DSCP:
*attr_mask |= MLX5_IB_GENERAL_RTT_RESP_DSCP_ATTR;
MLX5_SET(cong_control_r_roce_general, field, rtt_resp_dscp_valid, 1);
MLX5_SET(cong_control_r_roce_general, field, rtt_resp_dscp, var);
break;
}
}

2
drivers/infiniband/hw/mlx5/mlx5_ib.h
View file

@ -888,6 +888,8 @@ enum mlx5_ib_dbg_cc_types {
MLX5_IB_DBG_CC_NP_CNP_DSCP,
MLX5_IB_DBG_CC_NP_CNP_PRIO_MODE,
MLX5_IB_DBG_CC_NP_CNP_PRIO,
MLX5_IB_DBG_CC_GENERAL_RTT_RESP_DSCP_VALID,
MLX5_IB_DBG_CC_GENERAL_RTT_RESP_DSCP,
MLX5_IB_DBG_CC_MAX,
};

12
include/linux/mlx5/mlx5_ifc.h
View file

@ -2159,6 +2159,17 @@ struct mlx5_ifc_cong_control_r_roce_ecn_rp_bits {
u8 reserved_at_360[0x4a0];
};
struct mlx5_ifc_cong_control_r_roce_general_bits {
u8 reserved_at_0[0x80];
u8 reserved_at_80[0x10];
u8 rtt_resp_dscp_valid[0x1];
u8 reserved_at_91[0x9];
u8 rtt_resp_dscp[0x6];
u8 reserved_at_a0[0x760];
};
struct mlx5_ifc_cong_control_802_1qau_rp_bits {
u8 reserved_at_0[0x80];
@ -4304,6 +4315,7 @@ union mlx5_ifc_cong_control_roce_ecn_auto_bits {
struct mlx5_ifc_cong_control_802_1qau_rp_bits cong_control_802_1qau_rp;
struct mlx5_ifc_cong_control_r_roce_ecn_rp_bits cong_control_r_roce_ecn_rp;
struct mlx5_ifc_cong_control_r_roce_ecn_np_bits cong_control_r_roce_ecn_np;
struct mlx5_ifc_cong_control_r_roce_general_bits cong_control_r_roce_general;
u8 reserved_at_0[0x800];
};