1// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
2/* Copyright (c) 2020, Mellanox Technologies inc. All rights reserved. */
3
4#include "qos.h"
5
6#define MLX5_QOS_DEFAULT_DWRR_UID 0
7
8bool mlx5_qos_is_supported(struct mlx5_core_dev *mdev)
9{
10 if (!MLX5_CAP_GEN(mdev, qos))
11 return false;
12 if (!MLX5_CAP_QOS(mdev, nic_sq_scheduling))
13 return false;
14 if (!MLX5_CAP_QOS(mdev, nic_bw_share))
15 return false;
16 if (!MLX5_CAP_QOS(mdev, nic_rate_limit))
17 return false;
18 return true;
19}
20
21int mlx5_qos_max_leaf_nodes(struct mlx5_core_dev *mdev)
22{
23 return 1 << MLX5_CAP_QOS(mdev, log_max_qos_nic_queue_group);
24}
25
26int mlx5_qos_create_leaf_node(struct mlx5_core_dev *mdev, u32 parent_id,
27 u32 bw_share, u32 max_avg_bw, u32 *id)
28{
29 u32 sched_ctx[MLX5_ST_SZ_DW(scheduling_context)] = {0};
30
31 MLX5_SET(scheduling_context, sched_ctx, parent_element_id, parent_id);
32 MLX5_SET(scheduling_context, sched_ctx, element_type,
33 SCHEDULING_CONTEXT_ELEMENT_TYPE_QUEUE_GROUP);
34 MLX5_SET(scheduling_context, sched_ctx, bw_share, bw_share);
35 MLX5_SET(scheduling_context, sched_ctx, max_average_bw, max_avg_bw);
36
37 return mlx5_create_scheduling_element_cmd(dev: mdev, hierarchy: SCHEDULING_HIERARCHY_NIC,
38 context: sched_ctx, element_id: id);
39}
40
41int mlx5_qos_create_inner_node(struct mlx5_core_dev *mdev, u32 parent_id,
42 u32 bw_share, u32 max_avg_bw, u32 *id)
43{
44 u32 sched_ctx[MLX5_ST_SZ_DW(scheduling_context)] = {0};
45 void *attr;
46
47 MLX5_SET(scheduling_context, sched_ctx, parent_element_id, parent_id);
48 MLX5_SET(scheduling_context, sched_ctx, element_type,
49 SCHEDULING_CONTEXT_ELEMENT_TYPE_TSAR);
50 MLX5_SET(scheduling_context, sched_ctx, bw_share, bw_share);
51 MLX5_SET(scheduling_context, sched_ctx, max_average_bw, max_avg_bw);
52
53 attr = MLX5_ADDR_OF(scheduling_context, sched_ctx, element_attributes);
54 MLX5_SET(tsar_element, attr, tsar_type, TSAR_ELEMENT_TSAR_TYPE_DWRR);
55
56 return mlx5_create_scheduling_element_cmd(dev: mdev, hierarchy: SCHEDULING_HIERARCHY_NIC,
57 context: sched_ctx, element_id: id);
58}
59
60int mlx5_qos_create_root_node(struct mlx5_core_dev *mdev, u32 *id)
61{
62 return mlx5_qos_create_inner_node(mdev, MLX5_QOS_DEFAULT_DWRR_UID, bw_share: 0, max_avg_bw: 0, id);
63}
64
65int mlx5_qos_update_node(struct mlx5_core_dev *mdev,
66 u32 bw_share, u32 max_avg_bw, u32 id)
67{
68 u32 sched_ctx[MLX5_ST_SZ_DW(scheduling_context)] = {0};
69 u32 bitmask = 0;
70
71 MLX5_SET(scheduling_context, sched_ctx, bw_share, bw_share);
72 MLX5_SET(scheduling_context, sched_ctx, max_average_bw, max_avg_bw);
73
74 bitmask |= MODIFY_SCHEDULING_ELEMENT_IN_MODIFY_BITMASK_BW_SHARE;
75 bitmask |= MODIFY_SCHEDULING_ELEMENT_IN_MODIFY_BITMASK_MAX_AVERAGE_BW;
76
77 return mlx5_modify_scheduling_element_cmd(dev: mdev, hierarchy: SCHEDULING_HIERARCHY_NIC,
78 context: sched_ctx, element_id: id, modify_bitmask: bitmask);
79}
80
81int mlx5_qos_destroy_node(struct mlx5_core_dev *mdev, u32 id)
82{
83 return mlx5_destroy_scheduling_element_cmd(dev: mdev, hierarchy: SCHEDULING_HIERARCHY_NIC, element_id: id);
84}
85

source code of linux/drivers/net/ethernet/mellanox/mlx5/core/qos.c