1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright 2015 6WIND S.A. 3 * Copyright 2015 Mellanox Technologies, Ltd 4 */ 5 6 #include <unistd.h> 7 8 #include <rte_ether.h> 9 #include <rte_ethdev_driver.h> 10 #include <rte_interrupts.h> 11 #include <rte_alarm.h> 12 13 #include "mlx5.h" 14 #include "mlx5_rxtx.h" 15 #include "mlx5_utils.h" 16 17 /** 18 * Stop traffic on Tx queues. 19 * 20 * @param dev 21 * Pointer to Ethernet device structure. 22 */ 23 static void 24 mlx5_txq_stop(struct rte_eth_dev *dev) 25 { 26 struct mlx5_priv *priv = dev->data->dev_private; 27 unsigned int i; 28 29 for (i = 0; i != priv->txqs_n; ++i) 30 mlx5_txq_release(dev, i); 31 } 32 33 /** 34 * Start traffic on Tx queues. 35 * 36 * @param dev 37 * Pointer to Ethernet device structure. 38 * 39 * @return 40 * 0 on success, a negative errno value otherwise and rte_errno is set. 41 */ 42 static int 43 mlx5_txq_start(struct rte_eth_dev *dev) 44 { 45 struct mlx5_priv *priv = dev->data->dev_private; 46 unsigned int i; 47 int ret; 48 49 for (i = 0; i != priv->txqs_n; ++i) { 50 struct mlx5_txq_ctrl *txq_ctrl = mlx5_txq_get(dev, i); 51 52 if (!txq_ctrl) 53 continue; 54 txq_alloc_elts(txq_ctrl); 55 txq_ctrl->ibv = mlx5_txq_ibv_new(dev, i); 56 if (!txq_ctrl->ibv) { 57 rte_errno = ENOMEM; 58 goto error; 59 } 60 } 61 return 0; 62 error: 63 ret = rte_errno; /* Save rte_errno before cleanup. */ 64 do { 65 mlx5_txq_release(dev, i); 66 } while (i-- != 0); 67 rte_errno = ret; /* Restore rte_errno. */ 68 return -rte_errno; 69 } 70 71 /** 72 * Stop traffic on Rx queues. 73 * 74 * @param dev 75 * Pointer to Ethernet device structure. 76 */ 77 static void 78 mlx5_rxq_stop(struct rte_eth_dev *dev) 79 { 80 struct mlx5_priv *priv = dev->data->dev_private; 81 unsigned int i; 82 83 for (i = 0; i != priv->rxqs_n; ++i) 84 mlx5_rxq_release(dev, i); 85 } 86 87 /** 88 * Start traffic on Rx queues. 89 * 90 * @param dev 91 * Pointer to Ethernet device structure. 92 * 93 * @return 94 * 0 on success, a negative errno value otherwise and rte_errno is set. 95 */ 96 static int 97 mlx5_rxq_start(struct rte_eth_dev *dev) 98 { 99 struct mlx5_priv *priv = dev->data->dev_private; 100 unsigned int i; 101 int ret = 0; 102 enum mlx5_rxq_obj_type obj_type = MLX5_RXQ_OBJ_TYPE_IBV; 103 104 for (i = 0; i < priv->rxqs_n; ++i) { 105 if ((*priv->rxqs)[i]->lro) { 106 obj_type = MLX5_RXQ_OBJ_TYPE_DEVX_RQ; 107 break; 108 } 109 } 110 /* Allocate/reuse/resize mempool for Multi-Packet RQ. */ 111 if (mlx5_mprq_alloc_mp(dev)) { 112 /* Should not release Rx queues but return immediately. */ 113 return -rte_errno; 114 } 115 for (i = 0; i != priv->rxqs_n; ++i) { 116 struct mlx5_rxq_ctrl *rxq_ctrl = mlx5_rxq_get(dev, i); 117 struct rte_mempool *mp; 118 119 if (!rxq_ctrl) 120 continue; 121 /* Pre-register Rx mempool. */ 122 mp = mlx5_rxq_mprq_enabled(&rxq_ctrl->rxq) ? 123 rxq_ctrl->rxq.mprq_mp : rxq_ctrl->rxq.mp; 124 DRV_LOG(DEBUG, 125 "port %u Rx queue %u registering" 126 " mp %s having %u chunks", 127 dev->data->port_id, rxq_ctrl->rxq.idx, 128 mp->name, mp->nb_mem_chunks); 129 mlx5_mr_update_mp(dev, &rxq_ctrl->rxq.mr_ctrl, mp); 130 ret = rxq_alloc_elts(rxq_ctrl); 131 if (ret) 132 goto error; 133 rxq_ctrl->obj = mlx5_rxq_obj_new(dev, i, obj_type); 134 if (!rxq_ctrl->obj) 135 goto error; 136 if (obj_type == MLX5_RXQ_OBJ_TYPE_IBV) 137 rxq_ctrl->wqn = rxq_ctrl->obj->wq->wq_num; 138 else if (obj_type == MLX5_RXQ_OBJ_TYPE_DEVX_RQ) 139 rxq_ctrl->wqn = rxq_ctrl->obj->rq->id; 140 } 141 return 0; 142 error: 143 ret = rte_errno; /* Save rte_errno before cleanup. */ 144 do { 145 mlx5_rxq_release(dev, i); 146 } while (i-- != 0); 147 rte_errno = ret; /* Restore rte_errno. */ 148 return -rte_errno; 149 } 150 151 /** 152 * DPDK callback to start the device. 153 * 154 * Simulate device start by attaching all configured flows. 155 * 156 * @param dev 157 * Pointer to Ethernet device structure. 158 * 159 * @return 160 * 0 on success, a negative errno value otherwise and rte_errno is set. 161 */ 162 int 163 mlx5_dev_start(struct rte_eth_dev *dev) 164 { 165 struct mlx5_priv *priv = dev->data->dev_private; 166 int ret; 167 168 DRV_LOG(DEBUG, "port %u starting device", dev->data->port_id); 169 ret = mlx5_txq_start(dev); 170 if (ret) { 171 DRV_LOG(ERR, "port %u Tx queue allocation failed: %s", 172 dev->data->port_id, strerror(rte_errno)); 173 return -rte_errno; 174 } 175 ret = mlx5_rxq_start(dev); 176 if (ret) { 177 DRV_LOG(ERR, "port %u Rx queue allocation failed: %s", 178 dev->data->port_id, strerror(rte_errno)); 179 mlx5_txq_stop(dev); 180 return -rte_errno; 181 } 182 dev->data->dev_started = 1; 183 ret = mlx5_rx_intr_vec_enable(dev); 184 if (ret) { 185 DRV_LOG(ERR, "port %u Rx interrupt vector creation failed", 186 dev->data->port_id); 187 goto error; 188 } 189 mlx5_stats_init(dev); 190 ret = mlx5_traffic_enable(dev); 191 if (ret) { 192 DRV_LOG(DEBUG, "port %u failed to set defaults flows", 193 dev->data->port_id); 194 goto error; 195 } 196 ret = mlx5_flow_start(dev, &priv->flows); 197 if (ret) { 198 DRV_LOG(DEBUG, "port %u failed to set flows", 199 dev->data->port_id); 200 goto error; 201 } 202 rte_wmb(); 203 dev->tx_pkt_burst = mlx5_select_tx_function(dev); 204 dev->rx_pkt_burst = mlx5_select_rx_function(dev); 205 /* Enable datapath on secondary process. */ 206 mlx5_mp_req_start_rxtx(dev); 207 mlx5_dev_interrupt_handler_install(dev); 208 return 0; 209 error: 210 ret = rte_errno; /* Save rte_errno before cleanup. */ 211 /* Rollback. */ 212 dev->data->dev_started = 0; 213 mlx5_flow_stop(dev, &priv->flows); 214 mlx5_traffic_disable(dev); 215 mlx5_txq_stop(dev); 216 mlx5_rxq_stop(dev); 217 rte_errno = ret; /* Restore rte_errno. */ 218 return -rte_errno; 219 } 220 221 /** 222 * DPDK callback to stop the device. 223 * 224 * Simulate device stop by detaching all configured flows. 225 * 226 * @param dev 227 * Pointer to Ethernet device structure. 228 */ 229 void 230 mlx5_dev_stop(struct rte_eth_dev *dev) 231 { 232 struct mlx5_priv *priv = dev->data->dev_private; 233 234 dev->data->dev_started = 0; 235 /* Prevent crashes when queues are still in use. */ 236 dev->rx_pkt_burst = removed_rx_burst; 237 dev->tx_pkt_burst = removed_tx_burst; 238 rte_wmb(); 239 /* Disable datapath on secondary process. */ 240 mlx5_mp_req_stop_rxtx(dev); 241 usleep(1000 * priv->rxqs_n); 242 DRV_LOG(DEBUG, "port %u stopping device", dev->data->port_id); 243 mlx5_flow_stop(dev, &priv->flows); 244 mlx5_traffic_disable(dev); 245 mlx5_rx_intr_vec_disable(dev); 246 mlx5_dev_interrupt_handler_uninstall(dev); 247 mlx5_txq_stop(dev); 248 mlx5_rxq_stop(dev); 249 } 250 251 /** 252 * Enable traffic flows configured by control plane 253 * 254 * @param dev 255 * Pointer to Ethernet device private data. 256 * @param dev 257 * Pointer to Ethernet device structure. 258 * 259 * @return 260 * 0 on success, a negative errno value otherwise and rte_errno is set. 261 */ 262 int 263 mlx5_traffic_enable(struct rte_eth_dev *dev) 264 { 265 struct mlx5_priv *priv = dev->data->dev_private; 266 struct rte_flow_item_eth bcast = { 267 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff", 268 }; 269 struct rte_flow_item_eth ipv6_multi_spec = { 270 .dst.addr_bytes = "\x33\x33\x00\x00\x00\x00", 271 }; 272 struct rte_flow_item_eth ipv6_multi_mask = { 273 .dst.addr_bytes = "\xff\xff\x00\x00\x00\x00", 274 }; 275 struct rte_flow_item_eth unicast = { 276 .src.addr_bytes = "\x00\x00\x00\x00\x00\x00", 277 }; 278 struct rte_flow_item_eth unicast_mask = { 279 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff", 280 }; 281 const unsigned int vlan_filter_n = priv->vlan_filter_n; 282 const struct rte_ether_addr cmp = { 283 .addr_bytes = "\x00\x00\x00\x00\x00\x00", 284 }; 285 unsigned int i; 286 unsigned int j; 287 int ret; 288 289 if (priv->config.dv_esw_en && !priv->config.vf) 290 if (!mlx5_flow_create_esw_table_zero_flow(dev)) 291 goto error; 292 if (priv->isolated) 293 return 0; 294 if (dev->data->promiscuous) { 295 struct rte_flow_item_eth promisc = { 296 .dst.addr_bytes = "\x00\x00\x00\x00\x00\x00", 297 .src.addr_bytes = "\x00\x00\x00\x00\x00\x00", 298 .type = 0, 299 }; 300 301 ret = mlx5_ctrl_flow(dev, &promisc, &promisc); 302 if (ret) 303 goto error; 304 } 305 if (dev->data->all_multicast) { 306 struct rte_flow_item_eth multicast = { 307 .dst.addr_bytes = "\x01\x00\x00\x00\x00\x00", 308 .src.addr_bytes = "\x00\x00\x00\x00\x00\x00", 309 .type = 0, 310 }; 311 312 ret = mlx5_ctrl_flow(dev, &multicast, &multicast); 313 if (ret) 314 goto error; 315 } else { 316 /* Add broadcast/multicast flows. */ 317 for (i = 0; i != vlan_filter_n; ++i) { 318 uint16_t vlan = priv->vlan_filter[i]; 319 320 struct rte_flow_item_vlan vlan_spec = { 321 .tci = rte_cpu_to_be_16(vlan), 322 }; 323 struct rte_flow_item_vlan vlan_mask = 324 rte_flow_item_vlan_mask; 325 326 ret = mlx5_ctrl_flow_vlan(dev, &bcast, &bcast, 327 &vlan_spec, &vlan_mask); 328 if (ret) 329 goto error; 330 ret = mlx5_ctrl_flow_vlan(dev, &ipv6_multi_spec, 331 &ipv6_multi_mask, 332 &vlan_spec, &vlan_mask); 333 if (ret) 334 goto error; 335 } 336 if (!vlan_filter_n) { 337 ret = mlx5_ctrl_flow(dev, &bcast, &bcast); 338 if (ret) 339 goto error; 340 ret = mlx5_ctrl_flow(dev, &ipv6_multi_spec, 341 &ipv6_multi_mask); 342 if (ret) 343 goto error; 344 } 345 } 346 /* Add MAC address flows. */ 347 for (i = 0; i != MLX5_MAX_MAC_ADDRESSES; ++i) { 348 struct rte_ether_addr *mac = &dev->data->mac_addrs[i]; 349 350 if (!memcmp(mac, &cmp, sizeof(*mac))) 351 continue; 352 memcpy(&unicast.dst.addr_bytes, 353 mac->addr_bytes, 354 RTE_ETHER_ADDR_LEN); 355 for (j = 0; j != vlan_filter_n; ++j) { 356 uint16_t vlan = priv->vlan_filter[j]; 357 358 struct rte_flow_item_vlan vlan_spec = { 359 .tci = rte_cpu_to_be_16(vlan), 360 }; 361 struct rte_flow_item_vlan vlan_mask = 362 rte_flow_item_vlan_mask; 363 364 ret = mlx5_ctrl_flow_vlan(dev, &unicast, 365 &unicast_mask, 366 &vlan_spec, 367 &vlan_mask); 368 if (ret) 369 goto error; 370 } 371 if (!vlan_filter_n) { 372 ret = mlx5_ctrl_flow(dev, &unicast, &unicast_mask); 373 if (ret) 374 goto error; 375 } 376 } 377 return 0; 378 error: 379 ret = rte_errno; /* Save rte_errno before cleanup. */ 380 mlx5_flow_list_flush(dev, &priv->ctrl_flows); 381 rte_errno = ret; /* Restore rte_errno. */ 382 return -rte_errno; 383 } 384 385 386 /** 387 * Disable traffic flows configured by control plane 388 * 389 * @param dev 390 * Pointer to Ethernet device private data. 391 */ 392 void 393 mlx5_traffic_disable(struct rte_eth_dev *dev) 394 { 395 struct mlx5_priv *priv = dev->data->dev_private; 396 397 mlx5_flow_list_flush(dev, &priv->ctrl_flows); 398 } 399 400 /** 401 * Restart traffic flows configured by control plane 402 * 403 * @param dev 404 * Pointer to Ethernet device private data. 405 * 406 * @return 407 * 0 on success, a negative errno value otherwise and rte_errno is set. 408 */ 409 int 410 mlx5_traffic_restart(struct rte_eth_dev *dev) 411 { 412 if (dev->data->dev_started) { 413 mlx5_traffic_disable(dev); 414 return mlx5_traffic_enable(dev); 415 } 416 return 0; 417 } 418