1 /*- 2 * Copyright (c) 2016 Mellanox Technologies. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS `AS IS' AND 14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE 17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23 * SUCH DAMAGE. 24 */ 25 26 #ifndef __MLX5_EN_RL_H__ 27 #define __MLX5_EN_RL_H__ 28 29 #include <sys/param.h> 30 #include <sys/lock.h> 31 #include <sys/mutex.h> 32 #include <sys/sx.h> 33 #include <sys/proc.h> 34 #include <sys/condvar.h> 35 #include <sys/interrupt.h> 36 #include <sys/unistd.h> 37 38 #include <sys/queue.h> 39 40 #define MLX5E_RL_MAX_WORKERS 128 /* limited by Toeplitz hash */ 41 #define MLX5E_RL_MAX_TX_RATES (64 * 1024) /* software limit */ 42 #define MLX5E_RL_DEF_SQ_PER_WORKER (12 * 1024) /* software limit */ 43 #define MLX5E_RL_MAX_SQS (120 * 1024) /* software limit */ 44 45 #define MLX5E_RL_TX_COAL_USEC_DEFAULT 32 46 #define MLX5E_RL_TX_COAL_PKTS_DEFAULT 4 47 #define MLX5E_RL_TX_COAL_MODE_DEFAULT 0 48 #define MLX5E_RL_TX_COMP_FACT_DEFAULT 1 49 50 #define MLX5E_RL_WORKER_LOCK(rlw) mtx_lock(&(rlw)->mtx) 51 #define MLX5E_RL_WORKER_UNLOCK(rlw) mtx_unlock(&(rlw)->mtx) 52 53 #define MLX5E_RL_RLOCK(rl) sx_slock(&(rl)->rl_sxlock) 54 #define MLX5E_RL_RUNLOCK(rl) sx_sunlock(&(rl)->rl_sxlock) 55 56 #define MLX5E_RL_WLOCK(rl) sx_xlock(&(rl)->rl_sxlock) 57 #define MLX5E_RL_WUNLOCK(rl) sx_xunlock(&(rl)->rl_sxlock) 58 59 #define MLX5E_RL_PARAMS(m) \ 60 m(+1, u64, tx_queue_size, "tx_queue_size", "Default send queue size") \ 61 m(+1, u64, tx_coalesce_usecs, "tx_coalesce_usecs", "Limit in usec for joining TX packets") \ 62 m(+1, u64, tx_coalesce_pkts, "tx_coalesce_pkts", "Maximum number of TX packets to join") \ 63 m(+1, u64, tx_coalesce_mode, "tx_coalesce_mode", "0: EQE mode 1: CQE mode") \ 64 m(+1, u64, tx_completion_fact, "tx_completion_fact", "1..MAX: Completion event ratio") \ 65 m(+1, u64, tx_completion_fact_max, "tx_completion_fact_max", "Maximum completion event ratio") \ 66 m(+1, u64, tx_worker_threads_max, "tx_worker_threads_max", "Max number of TX worker threads") \ 67 m(+1, u64, tx_worker_threads_def, "tx_worker_threads_def", "Default number of TX worker threads") \ 68 m(+1, u64, tx_channels_per_worker_max, "tx_channels_per_worker_max", "Max number of TX channels per worker") \ 69 m(+1, u64, tx_channels_per_worker_def, "tx_channels_per_worker_def", "Default number of TX channels per worker") \ 70 m(+1, u64, tx_rates_max, "tx_rates_max", "Max number of TX rates") \ 71 m(+1, u64, tx_rates_def, "tx_rates_def", "Default number of TX rates") \ 72 m(+1, u64, tx_limit_min, "tx_limit_min", "Minimum TX rate in bits/s") \ 73 m(+1, u64, tx_limit_max, "tx_limit_max", "Maximum TX rate in bits/s") \ 74 m(+1, u64, tx_burst_size, "tx_burst_size", "Current burst size in number of packets. A value of zero means use firmware default.") \ 75 m(+1, u64, tx_burst_size_max, "tx_burst_size_max", "Maximum burst size in number of packets") \ 76 m(+1, u64, tx_burst_size_min, "tx_burst_size_min", "Minimum burst size in number of packets") 77 78 #define MLX5E_RL_PARAMS_NUM (0 MLX5E_RL_PARAMS(MLX5E_STATS_COUNT)) 79 80 #define MLX5E_RL_STATS(m) \ 81 m(+1, u64, tx_allocate_resource_failure, "tx_allocate_resource_failure", "Number of times firmware resource allocation failed") \ 82 m(+1, u64, tx_add_new_rate_failure, "tx_add_new_rate_failure", "Number of times adding a new firmware rate failed") \ 83 m(+1, u64, tx_modify_rate_failure, "tx_modify_rate_failure", "Number of times modifying a firmware rate failed") \ 84 m(+1, u64, tx_active_connections, "tx_active_connections", "Number of active connections") \ 85 m(+1, u64, tx_open_queues, "tx_open_queues", "Number of open TX queues") \ 86 m(+1, u64, tx_available_resource_failure, "tx_available_resource_failure", "Number of times TX resources were not available") 87 88 #define MLX5E_RL_STATS_NUM (0 MLX5E_RL_STATS(MLX5E_STATS_COUNT)) 89 90 #define MLX5E_RL_TABLE_PARAMS(m) \ 91 m(+1, u64, tx_limit_add, "tx_limit_add", "Add TX rate limit in bits/s to empty slot") \ 92 m(+1, u64, tx_limit_clr, "tx_limit_clr", "Clear all TX rates in table") \ 93 m(+1, u64, tx_allowed_deviation, "tx_allowed_deviation", "Relative rate deviation allowed in 1/1000") \ 94 m(+1, u64, tx_allowed_deviation_min, "tx_allowed_deviation_min", "Minimum allowed rate deviation in 1/1000") \ 95 m(+1, u64, tx_allowed_deviation_max, "tx_allowed_deviation_max", "Maximum allowed rate deviation in 1/1000") 96 97 #define MLX5E_RL_TABLE_PARAMS_NUM (0 MLX5E_RL_TABLE_PARAMS(MLX5E_STATS_COUNT)) 98 99 #define MLX5E_RL_PARAMS_INDEX(n) \ 100 (__offsetof(struct mlx5e_rl_params, n) / sizeof(uint64_t)) 101 102 struct mlx5e_priv; 103 104 /* Indicates channel's state */ 105 enum { 106 MLX5E_RL_ST_FREE, 107 MLX5E_RL_ST_USED, 108 MLX5E_RL_ST_MODIFY, 109 MLX5E_RL_ST_DESTROY, 110 }; 111 112 struct mlx5e_rl_stats { 113 u64 arg [0]; 114 MLX5E_RL_STATS(MLX5E_STATS_VAR) 115 }; 116 117 struct mlx5e_rl_params { 118 u64 arg [0]; 119 MLX5E_RL_PARAMS(MLX5E_STATS_VAR) 120 u64 table_arg [0]; 121 MLX5E_RL_TABLE_PARAMS(MLX5E_STATS_VAR) 122 }; 123 124 struct mlx5e_rl_channel_param { 125 struct mlx5e_sq_param sq; 126 struct mlx5e_cq_param cq; 127 }; 128 129 struct mlx5e_rl_channel { 130 struct m_snd_tag tag; 131 STAILQ_ENTRY(mlx5e_rl_channel) entry; 132 struct mlx5e_sq * volatile sq; 133 struct mlx5e_rl_worker *worker; 134 uint64_t new_rate; 135 uint64_t init_rate; 136 uint64_t last_rate; 137 uint32_t refcount; 138 uint16_t last_burst; 139 uint16_t state; 140 }; 141 142 struct mlx5e_rl_worker { 143 struct mtx mtx; 144 struct cv cv; 145 STAILQ_HEAD(, mlx5e_rl_channel) index_list_head; 146 STAILQ_HEAD(, mlx5e_rl_channel) process_head; 147 struct mlx5e_priv *priv; 148 struct mlx5e_rl_channel *channels; 149 unsigned worker_done; 150 }; 151 152 struct mlx5e_rl_priv_data { 153 struct sx rl_sxlock; 154 struct sysctl_ctx_list ctx; 155 struct mlx5e_rl_channel_param chan_param; 156 struct mlx5e_rl_params param; 157 struct mlx5e_rl_stats stats; 158 struct mlx5e_rl_worker *workers; 159 struct mlx5e_priv *priv; 160 uint64_t *rate_limit_table; 161 unsigned opened; 162 uint32_t tisn; 163 }; 164 165 int mlx5e_rl_init(struct mlx5e_priv *priv); 166 void mlx5e_rl_cleanup(struct mlx5e_priv *priv); 167 void mlx5e_rl_refresh_sq_inline(struct mlx5e_rl_priv_data *rl); 168 169 if_snd_tag_alloc_t mlx5e_rl_snd_tag_alloc; 170 171 #endif /* __MLX5_EN_RL_H__ */ 172