1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB 2 /* Copyright (c) 2020 Mellanox Technologies */ 3 4 #include <net/page_pool.h> 5 #include "en/txrx.h" 6 #include "en/params.h" 7 #include "en/trap.h" 8 9 static int mlx5e_trap_napi_poll(struct napi_struct *napi, int budget) 10 { 11 struct mlx5e_trap *trap_ctx = container_of(napi, struct mlx5e_trap, napi); 12 struct mlx5e_ch_stats *ch_stats = trap_ctx->stats; 13 struct mlx5e_rq *rq = &trap_ctx->rq; 14 bool busy = false; 15 int work_done = 0; 16 17 ch_stats->poll++; 18 19 work_done = mlx5e_poll_rx_cq(&rq->cq, budget); 20 busy |= work_done == budget; 21 busy |= rq->post_wqes(rq); 22 23 if (busy) 24 return budget; 25 26 if (unlikely(!napi_complete_done(napi, work_done))) 27 return work_done; 28 29 mlx5e_cq_arm(&rq->cq); 30 return work_done; 31 } 32 33 static void mlx5e_init_trap_rq(struct mlx5e_trap *t, struct mlx5e_params *params, 34 struct mlx5e_rq *rq) 35 { 36 struct mlx5_core_dev *mdev = t->mdev; 37 struct mlx5e_priv *priv = t->priv; 38 39 rq->wq_type = params->rq_wq_type; 40 rq->pdev = t->pdev; 41 rq->netdev = priv->netdev; 42 rq->priv = priv; 43 rq->clock = &mdev->clock; 44 rq->tstamp = &priv->tstamp; 45 rq->mdev = mdev; 46 rq->hw_mtu = MLX5E_SW2HW_MTU(params, params->sw_mtu); 47 rq->stats = &priv->trap_stats.rq; 48 rq->ptp_cyc2time = mlx5_rq_ts_translator(mdev); 49 xdp_rxq_info_unused(&rq->xdp_rxq); 50 mlx5e_rq_set_trap_handlers(rq, params); 51 } 52 53 static int mlx5e_open_trap_rq(struct mlx5e_priv *priv, struct mlx5e_trap *t) 54 { 55 struct mlx5e_rq_param *rq_param = &t->rq_param; 56 struct mlx5_core_dev *mdev = priv->mdev; 57 struct mlx5e_create_cq_param ccp = {}; 58 struct dim_cq_moder trap_moder = {}; 59 struct mlx5e_rq *rq = &t->rq; 60 int node; 61 int err; 62 63 node = dev_to_node(mdev->device); 64 65 ccp.node = node; 66 ccp.ch_stats = t->stats; 67 ccp.napi = &t->napi; 68 ccp.ix = 0; 69 err = mlx5e_open_cq(priv, trap_moder, &rq_param->cqp, &ccp, &rq->cq); 70 if (err) 71 return err; 72 73 mlx5e_init_trap_rq(t, &t->params, rq); 74 err = mlx5e_open_rq(&t->params, rq_param, NULL, node, rq); 75 if (err) 76 goto err_destroy_cq; 77 78 return 0; 79 80 err_destroy_cq: 81 mlx5e_close_cq(&rq->cq); 82 83 return err; 84 } 85 86 static void mlx5e_close_trap_rq(struct mlx5e_rq *rq) 87 { 88 mlx5e_close_rq(rq); 89 mlx5e_close_cq(&rq->cq); 90 } 91 92 static int mlx5e_create_trap_direct_rq_tir(struct mlx5_core_dev *mdev, struct mlx5e_tir *tir, 93 u32 rqn) 94 { 95 struct mlx5e_tir_builder *builder; 96 int err; 97 98 builder = mlx5e_tir_builder_alloc(false); 99 if (!builder) 100 return -ENOMEM; 101 102 mlx5e_tir_builder_build_inline(builder, mdev->mlx5e_res.hw_objs.td.tdn, rqn); 103 err = mlx5e_tir_init(tir, builder, mdev, true); 104 105 mlx5e_tir_builder_free(builder); 106 107 return err; 108 } 109 110 static void mlx5e_build_trap_params(struct mlx5_core_dev *mdev, 111 int max_mtu, u16 q_counter, 112 struct mlx5e_trap *t) 113 { 114 struct mlx5e_params *params = &t->params; 115 116 params->rq_wq_type = MLX5_WQ_TYPE_CYCLIC; 117 mlx5e_init_rq_type_params(mdev, params); 118 params->sw_mtu = max_mtu; 119 mlx5e_build_rq_param(mdev, params, NULL, q_counter, &t->rq_param); 120 } 121 122 static struct mlx5e_trap *mlx5e_open_trap(struct mlx5e_priv *priv) 123 { 124 int cpu = cpumask_first(mlx5_comp_irq_get_affinity_mask(priv->mdev, 0)); 125 struct net_device *netdev = priv->netdev; 126 struct mlx5e_trap *t; 127 int err; 128 129 t = kvzalloc_node(sizeof(*t), GFP_KERNEL, cpu_to_node(cpu)); 130 if (!t) 131 return ERR_PTR(-ENOMEM); 132 133 mlx5e_build_trap_params(priv->mdev, netdev->max_mtu, priv->q_counter, t); 134 135 t->priv = priv; 136 t->mdev = priv->mdev; 137 t->tstamp = &priv->tstamp; 138 t->pdev = mlx5_core_dma_dev(priv->mdev); 139 t->netdev = priv->netdev; 140 t->mkey_be = cpu_to_be32(priv->mdev->mlx5e_res.hw_objs.mkey); 141 t->stats = &priv->trap_stats.ch; 142 143 netif_napi_add(netdev, &t->napi, mlx5e_trap_napi_poll, 64); 144 145 err = mlx5e_open_trap_rq(priv, t); 146 if (unlikely(err)) 147 goto err_napi_del; 148 149 err = mlx5e_create_trap_direct_rq_tir(t->mdev, &t->tir, t->rq.rqn); 150 if (err) 151 goto err_close_trap_rq; 152 153 return t; 154 155 err_close_trap_rq: 156 mlx5e_close_trap_rq(&t->rq); 157 err_napi_del: 158 netif_napi_del(&t->napi); 159 kvfree(t); 160 return ERR_PTR(err); 161 } 162 163 void mlx5e_close_trap(struct mlx5e_trap *trap) 164 { 165 mlx5e_tir_destroy(&trap->tir); 166 mlx5e_close_trap_rq(&trap->rq); 167 netif_napi_del(&trap->napi); 168 kvfree(trap); 169 } 170 171 static void mlx5e_activate_trap(struct mlx5e_trap *trap) 172 { 173 napi_enable(&trap->napi); 174 mlx5e_activate_rq(&trap->rq); 175 } 176 177 void mlx5e_deactivate_trap(struct mlx5e_priv *priv) 178 { 179 struct mlx5e_trap *trap = priv->en_trap; 180 181 mlx5e_deactivate_rq(&trap->rq); 182 napi_disable(&trap->napi); 183 } 184 185 static struct mlx5e_trap *mlx5e_add_trap_queue(struct mlx5e_priv *priv) 186 { 187 struct mlx5e_trap *trap; 188 189 trap = mlx5e_open_trap(priv); 190 if (IS_ERR(trap)) 191 goto out; 192 193 mlx5e_activate_trap(trap); 194 out: 195 return trap; 196 } 197 198 static void mlx5e_del_trap_queue(struct mlx5e_priv *priv) 199 { 200 mlx5e_deactivate_trap(priv); 201 mlx5e_close_trap(priv->en_trap); 202 priv->en_trap = NULL; 203 } 204 205 static int mlx5e_trap_get_tirn(struct mlx5e_trap *en_trap) 206 { 207 return en_trap->tir.tirn; 208 } 209 210 static int mlx5e_handle_action_trap(struct mlx5e_priv *priv, int trap_id) 211 { 212 bool open_queue = !priv->en_trap; 213 struct mlx5e_trap *trap; 214 int err; 215 216 if (open_queue) { 217 trap = mlx5e_add_trap_queue(priv); 218 if (IS_ERR(trap)) 219 return PTR_ERR(trap); 220 priv->en_trap = trap; 221 } 222 223 switch (trap_id) { 224 case DEVLINK_TRAP_GENERIC_ID_INGRESS_VLAN_FILTER: 225 err = mlx5e_add_vlan_trap(priv, trap_id, mlx5e_trap_get_tirn(priv->en_trap)); 226 if (err) 227 goto err_out; 228 break; 229 case DEVLINK_TRAP_GENERIC_ID_DMAC_FILTER: 230 err = mlx5e_add_mac_trap(priv, trap_id, mlx5e_trap_get_tirn(priv->en_trap)); 231 if (err) 232 goto err_out; 233 break; 234 default: 235 netdev_warn(priv->netdev, "%s: Unknown trap id %d\n", __func__, trap_id); 236 err = -EINVAL; 237 goto err_out; 238 } 239 return 0; 240 241 err_out: 242 if (open_queue) 243 mlx5e_del_trap_queue(priv); 244 return err; 245 } 246 247 static int mlx5e_handle_action_drop(struct mlx5e_priv *priv, int trap_id) 248 { 249 switch (trap_id) { 250 case DEVLINK_TRAP_GENERIC_ID_INGRESS_VLAN_FILTER: 251 mlx5e_remove_vlan_trap(priv); 252 break; 253 case DEVLINK_TRAP_GENERIC_ID_DMAC_FILTER: 254 mlx5e_remove_mac_trap(priv); 255 break; 256 default: 257 netdev_warn(priv->netdev, "%s: Unknown trap id %d\n", __func__, trap_id); 258 return -EINVAL; 259 } 260 if (priv->en_trap && !mlx5_devlink_trap_get_num_active(priv->mdev)) 261 mlx5e_del_trap_queue(priv); 262 263 return 0; 264 } 265 266 int mlx5e_handle_trap_event(struct mlx5e_priv *priv, struct mlx5_trap_ctx *trap_ctx) 267 { 268 int err = 0; 269 270 /* Traps are unarmed when interface is down, no need to update 271 * them. The configuration is saved in the core driver, 272 * queried and applied upon interface up operation in 273 * mlx5e_open_locked(). 274 */ 275 if (!test_bit(MLX5E_STATE_OPENED, &priv->state)) 276 return 0; 277 278 switch (trap_ctx->action) { 279 case DEVLINK_TRAP_ACTION_TRAP: 280 err = mlx5e_handle_action_trap(priv, trap_ctx->id); 281 break; 282 case DEVLINK_TRAP_ACTION_DROP: 283 err = mlx5e_handle_action_drop(priv, trap_ctx->id); 284 break; 285 default: 286 netdev_warn(priv->netdev, "%s: Unsupported action %d\n", __func__, 287 trap_ctx->action); 288 err = -EINVAL; 289 } 290 return err; 291 } 292 293 static int mlx5e_apply_trap(struct mlx5e_priv *priv, int trap_id, bool enable) 294 { 295 enum devlink_trap_action action; 296 int err; 297 298 err = mlx5_devlink_traps_get_action(priv->mdev, trap_id, &action); 299 if (err) 300 return err; 301 if (action == DEVLINK_TRAP_ACTION_TRAP) 302 err = enable ? mlx5e_handle_action_trap(priv, trap_id) : 303 mlx5e_handle_action_drop(priv, trap_id); 304 return err; 305 } 306 307 static const int mlx5e_traps_arr[] = { 308 DEVLINK_TRAP_GENERIC_ID_INGRESS_VLAN_FILTER, 309 DEVLINK_TRAP_GENERIC_ID_DMAC_FILTER, 310 }; 311 312 int mlx5e_apply_traps(struct mlx5e_priv *priv, bool enable) 313 { 314 int err; 315 int i; 316 317 for (i = 0; i < ARRAY_SIZE(mlx5e_traps_arr); i++) { 318 err = mlx5e_apply_trap(priv, mlx5e_traps_arr[i], enable); 319 if (err) 320 return err; 321 } 322 return 0; 323 } 324