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 unsigned int lro_on = mlx5_lro_on(dev); 103 enum mlx5_rxq_obj_type obj_type = lro_on ? MLX5_RXQ_OBJ_TYPE_DEVX_RQ : 104 MLX5_RXQ_OBJ_TYPE_IBV; 105 106 /* Allocate/reuse/resize mempool for Multi-Packet RQ. */ 107 if (mlx5_mprq_alloc_mp(dev)) { 108 /* Should not release Rx queues but return immediately. */ 109 return -rte_errno; 110 } 111 for (i = 0; i != priv->rxqs_n; ++i) { 112 struct mlx5_rxq_ctrl *rxq_ctrl = mlx5_rxq_get(dev, i); 113 struct rte_mempool *mp; 114 115 if (!rxq_ctrl) 116 continue; 117 /* Pre-register Rx mempool. */ 118 mp = mlx5_rxq_mprq_enabled(&rxq_ctrl->rxq) ? 119 rxq_ctrl->rxq.mprq_mp : rxq_ctrl->rxq.mp; 120 DRV_LOG(DEBUG, 121 "port %u Rx queue %u registering" 122 " mp %s having %u chunks", 123 dev->data->port_id, rxq_ctrl->rxq.idx, 124 mp->name, mp->nb_mem_chunks); 125 mlx5_mr_update_mp(dev, &rxq_ctrl->rxq.mr_ctrl, mp); 126 ret = rxq_alloc_elts(rxq_ctrl); 127 if (ret) 128 goto error; 129 rxq_ctrl->obj = mlx5_rxq_obj_new(dev, i, obj_type); 130 if (!rxq_ctrl->obj) 131 goto error; 132 if (obj_type == MLX5_RXQ_OBJ_TYPE_IBV) 133 rxq_ctrl->wqn = rxq_ctrl->obj->wq->wq_num; 134 else if (obj_type == MLX5_RXQ_OBJ_TYPE_DEVX_RQ) 135 rxq_ctrl->wqn = rxq_ctrl->obj->rq->id; 136 } 137 return 0; 138 error: 139 ret = rte_errno; /* Save rte_errno before cleanup. */ 140 do { 141 mlx5_rxq_release(dev, i); 142 } while (i-- != 0); 143 rte_errno = ret; /* Restore rte_errno. */ 144 return -rte_errno; 145 } 146 147 /** 148 * DPDK callback to start the device. 149 * 150 * Simulate device start by attaching all configured flows. 151 * 152 * @param dev 153 * Pointer to Ethernet device structure. 154 * 155 * @return 156 * 0 on success, a negative errno value otherwise and rte_errno is set. 157 */ 158 int 159 mlx5_dev_start(struct rte_eth_dev *dev) 160 { 161 struct mlx5_priv *priv = dev->data->dev_private; 162 int ret; 163 164 DRV_LOG(DEBUG, "port %u starting device", dev->data->port_id); 165 ret = mlx5_txq_start(dev); 166 if (ret) { 167 DRV_LOG(ERR, "port %u Tx queue allocation failed: %s", 168 dev->data->port_id, strerror(rte_errno)); 169 return -rte_errno; 170 } 171 ret = mlx5_rxq_start(dev); 172 if (ret) { 173 DRV_LOG(ERR, "port %u Rx queue allocation failed: %s", 174 dev->data->port_id, strerror(rte_errno)); 175 mlx5_txq_stop(dev); 176 return -rte_errno; 177 } 178 dev->data->dev_started = 1; 179 ret = mlx5_rx_intr_vec_enable(dev); 180 if (ret) { 181 DRV_LOG(ERR, "port %u Rx interrupt vector creation failed", 182 dev->data->port_id); 183 goto error; 184 } 185 mlx5_stats_init(dev); 186 ret = mlx5_traffic_enable(dev); 187 if (ret) { 188 DRV_LOG(DEBUG, "port %u failed to set defaults flows", 189 dev->data->port_id); 190 goto error; 191 } 192 ret = mlx5_flow_start(dev, &priv->flows); 193 if (ret) { 194 DRV_LOG(DEBUG, "port %u failed to set flows", 195 dev->data->port_id); 196 goto error; 197 } 198 rte_wmb(); 199 dev->tx_pkt_burst = mlx5_select_tx_function(dev); 200 dev->rx_pkt_burst = mlx5_select_rx_function(dev); 201 /* Enable datapath on secondary process. */ 202 mlx5_mp_req_start_rxtx(dev); 203 mlx5_dev_interrupt_handler_install(dev); 204 return 0; 205 error: 206 ret = rte_errno; /* Save rte_errno before cleanup. */ 207 /* Rollback. */ 208 dev->data->dev_started = 0; 209 mlx5_flow_stop(dev, &priv->flows); 210 mlx5_traffic_disable(dev); 211 mlx5_txq_stop(dev); 212 mlx5_rxq_stop(dev); 213 rte_errno = ret; /* Restore rte_errno. */ 214 return -rte_errno; 215 } 216 217 /** 218 * DPDK callback to stop the device. 219 * 220 * Simulate device stop by detaching all configured flows. 221 * 222 * @param dev 223 * Pointer to Ethernet device structure. 224 */ 225 void 226 mlx5_dev_stop(struct rte_eth_dev *dev) 227 { 228 struct mlx5_priv *priv = dev->data->dev_private; 229 230 dev->data->dev_started = 0; 231 /* Prevent crashes when queues are still in use. */ 232 dev->rx_pkt_burst = removed_rx_burst; 233 dev->tx_pkt_burst = removed_tx_burst; 234 rte_wmb(); 235 /* Disable datapath on secondary process. */ 236 mlx5_mp_req_stop_rxtx(dev); 237 usleep(1000 * priv->rxqs_n); 238 DRV_LOG(DEBUG, "port %u stopping device", dev->data->port_id); 239 mlx5_flow_stop(dev, &priv->flows); 240 mlx5_traffic_disable(dev); 241 mlx5_rx_intr_vec_disable(dev); 242 mlx5_dev_interrupt_handler_uninstall(dev); 243 mlx5_txq_stop(dev); 244 mlx5_rxq_stop(dev); 245 } 246 247 /** 248 * Enable traffic flows configured by control plane 249 * 250 * @param dev 251 * Pointer to Ethernet device private data. 252 * @param dev 253 * Pointer to Ethernet device structure. 254 * 255 * @return 256 * 0 on success, a negative errno value otherwise and rte_errno is set. 257 */ 258 int 259 mlx5_traffic_enable(struct rte_eth_dev *dev) 260 { 261 struct mlx5_priv *priv = dev->data->dev_private; 262 struct rte_flow_item_eth bcast = { 263 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff", 264 }; 265 struct rte_flow_item_eth ipv6_multi_spec = { 266 .dst.addr_bytes = "\x33\x33\x00\x00\x00\x00", 267 }; 268 struct rte_flow_item_eth ipv6_multi_mask = { 269 .dst.addr_bytes = "\xff\xff\x00\x00\x00\x00", 270 }; 271 struct rte_flow_item_eth unicast = { 272 .src.addr_bytes = "\x00\x00\x00\x00\x00\x00", 273 }; 274 struct rte_flow_item_eth unicast_mask = { 275 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff", 276 }; 277 const unsigned int vlan_filter_n = priv->vlan_filter_n; 278 const struct rte_ether_addr cmp = { 279 .addr_bytes = "\x00\x00\x00\x00\x00\x00", 280 }; 281 unsigned int i; 282 unsigned int j; 283 int ret; 284 285 if (priv->isolated) 286 return 0; 287 if (dev->data->promiscuous) { 288 struct rte_flow_item_eth promisc = { 289 .dst.addr_bytes = "\x00\x00\x00\x00\x00\x00", 290 .src.addr_bytes = "\x00\x00\x00\x00\x00\x00", 291 .type = 0, 292 }; 293 294 ret = mlx5_ctrl_flow(dev, &promisc, &promisc); 295 if (ret) 296 goto error; 297 } 298 if (dev->data->all_multicast) { 299 struct rte_flow_item_eth multicast = { 300 .dst.addr_bytes = "\x01\x00\x00\x00\x00\x00", 301 .src.addr_bytes = "\x00\x00\x00\x00\x00\x00", 302 .type = 0, 303 }; 304 305 ret = mlx5_ctrl_flow(dev, &multicast, &multicast); 306 if (ret) 307 goto error; 308 } else { 309 /* Add broadcast/multicast flows. */ 310 for (i = 0; i != vlan_filter_n; ++i) { 311 uint16_t vlan = priv->vlan_filter[i]; 312 313 struct rte_flow_item_vlan vlan_spec = { 314 .tci = rte_cpu_to_be_16(vlan), 315 }; 316 struct rte_flow_item_vlan vlan_mask = 317 rte_flow_item_vlan_mask; 318 319 ret = mlx5_ctrl_flow_vlan(dev, &bcast, &bcast, 320 &vlan_spec, &vlan_mask); 321 if (ret) 322 goto error; 323 ret = mlx5_ctrl_flow_vlan(dev, &ipv6_multi_spec, 324 &ipv6_multi_mask, 325 &vlan_spec, &vlan_mask); 326 if (ret) 327 goto error; 328 } 329 if (!vlan_filter_n) { 330 ret = mlx5_ctrl_flow(dev, &bcast, &bcast); 331 if (ret) 332 goto error; 333 ret = mlx5_ctrl_flow(dev, &ipv6_multi_spec, 334 &ipv6_multi_mask); 335 if (ret) 336 goto error; 337 } 338 } 339 /* Add MAC address flows. */ 340 for (i = 0; i != MLX5_MAX_MAC_ADDRESSES; ++i) { 341 struct rte_ether_addr *mac = &dev->data->mac_addrs[i]; 342 343 if (!memcmp(mac, &cmp, sizeof(*mac))) 344 continue; 345 memcpy(&unicast.dst.addr_bytes, 346 mac->addr_bytes, 347 RTE_ETHER_ADDR_LEN); 348 for (j = 0; j != vlan_filter_n; ++j) { 349 uint16_t vlan = priv->vlan_filter[j]; 350 351 struct rte_flow_item_vlan vlan_spec = { 352 .tci = rte_cpu_to_be_16(vlan), 353 }; 354 struct rte_flow_item_vlan vlan_mask = 355 rte_flow_item_vlan_mask; 356 357 ret = mlx5_ctrl_flow_vlan(dev, &unicast, 358 &unicast_mask, 359 &vlan_spec, 360 &vlan_mask); 361 if (ret) 362 goto error; 363 } 364 if (!vlan_filter_n) { 365 ret = mlx5_ctrl_flow(dev, &unicast, &unicast_mask); 366 if (ret) 367 goto error; 368 } 369 } 370 return 0; 371 error: 372 ret = rte_errno; /* Save rte_errno before cleanup. */ 373 mlx5_flow_list_flush(dev, &priv->ctrl_flows); 374 rte_errno = ret; /* Restore rte_errno. */ 375 return -rte_errno; 376 } 377 378 379 /** 380 * Disable traffic flows configured by control plane 381 * 382 * @param dev 383 * Pointer to Ethernet device private data. 384 */ 385 void 386 mlx5_traffic_disable(struct rte_eth_dev *dev) 387 { 388 struct mlx5_priv *priv = dev->data->dev_private; 389 390 mlx5_flow_list_flush(dev, &priv->ctrl_flows); 391 } 392 393 /** 394 * Restart traffic flows configured by control plane 395 * 396 * @param dev 397 * Pointer to Ethernet device private data. 398 * 399 * @return 400 * 0 on success, a negative errno value otherwise and rte_errno is set. 401 */ 402 int 403 mlx5_traffic_restart(struct rte_eth_dev *dev) 404 { 405 if (dev->data->dev_started) { 406 mlx5_traffic_disable(dev); 407 return mlx5_traffic_enable(dev); 408 } 409 return 0; 410 } 411