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 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 priv *priv = dev->data->dev_private; 46 unsigned int i; 47 int ret; 48 49 /* Add memory regions to Tx queues. */ 50 for (i = 0; i != priv->txqs_n; ++i) { 51 struct mlx5_txq_ctrl *txq_ctrl = mlx5_txq_get(dev, i); 52 53 if (!txq_ctrl) 54 continue; 55 txq_alloc_elts(txq_ctrl); 56 txq_ctrl->ibv = mlx5_txq_ibv_new(dev, i); 57 if (!txq_ctrl->ibv) { 58 rte_errno = ENOMEM; 59 goto error; 60 } 61 } 62 ret = mlx5_tx_uar_remap(dev, priv->ctx->cmd_fd); 63 if (ret) 64 goto error; 65 return 0; 66 error: 67 ret = rte_errno; /* Save rte_errno before cleanup. */ 68 mlx5_txq_stop(dev); 69 rte_errno = ret; /* Restore rte_errno. */ 70 return -rte_errno; 71 } 72 73 /** 74 * Stop traffic on Rx queues. 75 * 76 * @param dev 77 * Pointer to Ethernet device structure. 78 */ 79 static void 80 mlx5_rxq_stop(struct rte_eth_dev *dev) 81 { 82 struct priv *priv = dev->data->dev_private; 83 unsigned int i; 84 85 for (i = 0; i != priv->rxqs_n; ++i) 86 mlx5_rxq_release(dev, i); 87 } 88 89 /** 90 * Start traffic on Rx queues. 91 * 92 * @param dev 93 * Pointer to Ethernet device structure. 94 * 95 * @return 96 * 0 on success, a negative errno value otherwise and rte_errno is set. 97 */ 98 static int 99 mlx5_rxq_start(struct rte_eth_dev *dev) 100 { 101 struct priv *priv = dev->data->dev_private; 102 unsigned int i; 103 int ret = 0; 104 105 for (i = 0; i != priv->rxqs_n; ++i) { 106 struct mlx5_rxq_ctrl *rxq_ctrl = mlx5_rxq_get(dev, i); 107 struct rte_mempool *mp; 108 109 if (!rxq_ctrl) 110 continue; 111 /* Pre-register Rx mempool. */ 112 mp = rxq_ctrl->rxq.mp; 113 DRV_LOG(DEBUG, 114 "port %u Rx queue %u registering" 115 " mp %s having %u chunks", 116 dev->data->port_id, rxq_ctrl->idx, 117 mp->name, mp->nb_mem_chunks); 118 mlx5_mr_update_mp(dev, &rxq_ctrl->rxq.mr_ctrl, mp); 119 ret = rxq_alloc_elts(rxq_ctrl); 120 if (ret) 121 goto error; 122 rxq_ctrl->ibv = mlx5_rxq_ibv_new(dev, i); 123 if (!rxq_ctrl->ibv) 124 goto error; 125 } 126 return 0; 127 error: 128 ret = rte_errno; /* Save rte_errno before cleanup. */ 129 mlx5_rxq_stop(dev); 130 rte_errno = ret; /* Restore rte_errno. */ 131 return -rte_errno; 132 } 133 134 /** 135 * DPDK callback to start the device. 136 * 137 * Simulate device start by attaching all configured flows. 138 * 139 * @param dev 140 * Pointer to Ethernet device structure. 141 * 142 * @return 143 * 0 on success, a negative errno value otherwise and rte_errno is set. 144 */ 145 int 146 mlx5_dev_start(struct rte_eth_dev *dev) 147 { 148 struct priv *priv = dev->data->dev_private; 149 int ret; 150 151 dev->data->dev_started = 1; 152 DRV_LOG(DEBUG, "port %u allocating and configuring hash Rx queues", 153 dev->data->port_id); 154 ret = mlx5_txq_start(dev); 155 if (ret) { 156 DRV_LOG(ERR, "port %u Tx queue allocation failed: %s", 157 dev->data->port_id, strerror(rte_errno)); 158 goto error; 159 } 160 ret = mlx5_rxq_start(dev); 161 if (ret) { 162 DRV_LOG(ERR, "port %u Rx queue allocation failed: %s", 163 dev->data->port_id, strerror(rte_errno)); 164 goto error; 165 } 166 if (rte_log_get_level(mlx5_logtype) == RTE_LOG_DEBUG) 167 mlx5_mr_dump_dev(dev); 168 ret = mlx5_rx_intr_vec_enable(dev); 169 if (ret) { 170 DRV_LOG(ERR, "port %u Rx interrupt vector creation failed", 171 dev->data->port_id); 172 goto error; 173 } 174 mlx5_xstats_init(dev); 175 ret = mlx5_traffic_enable(dev); 176 if (ret) { 177 DRV_LOG(DEBUG, "port %u failed to set defaults flows", 178 dev->data->port_id); 179 goto error; 180 } 181 ret = mlx5_flow_start(dev, &priv->flows); 182 if (ret) { 183 DRV_LOG(DEBUG, "port %u failed to set flows", 184 dev->data->port_id); 185 goto error; 186 } 187 dev->tx_pkt_burst = mlx5_select_tx_function(dev); 188 dev->rx_pkt_burst = mlx5_select_rx_function(dev); 189 mlx5_dev_interrupt_handler_install(dev); 190 return 0; 191 error: 192 ret = rte_errno; /* Save rte_errno before cleanup. */ 193 /* Rollback. */ 194 dev->data->dev_started = 0; 195 mlx5_flow_stop(dev, &priv->flows); 196 mlx5_traffic_disable(dev); 197 mlx5_txq_stop(dev); 198 mlx5_rxq_stop(dev); 199 rte_errno = ret; /* Restore rte_errno. */ 200 return -rte_errno; 201 } 202 203 /** 204 * DPDK callback to stop the device. 205 * 206 * Simulate device stop by detaching all configured flows. 207 * 208 * @param dev 209 * Pointer to Ethernet device structure. 210 */ 211 void 212 mlx5_dev_stop(struct rte_eth_dev *dev) 213 { 214 struct priv *priv = dev->data->dev_private; 215 216 dev->data->dev_started = 0; 217 /* Prevent crashes when queues are still in use. */ 218 dev->rx_pkt_burst = removed_rx_burst; 219 dev->tx_pkt_burst = removed_tx_burst; 220 rte_wmb(); 221 usleep(1000 * priv->rxqs_n); 222 DRV_LOG(DEBUG, "port %u cleaning up and destroying hash Rx queues", 223 dev->data->port_id); 224 mlx5_flow_stop(dev, &priv->flows); 225 mlx5_traffic_disable(dev); 226 mlx5_rx_intr_vec_disable(dev); 227 mlx5_dev_interrupt_handler_uninstall(dev); 228 mlx5_txq_stop(dev); 229 mlx5_rxq_stop(dev); 230 } 231 232 /** 233 * Enable traffic flows configured by control plane 234 * 235 * @param dev 236 * Pointer to Ethernet device private data. 237 * @param dev 238 * Pointer to Ethernet device structure. 239 * 240 * @return 241 * 0 on success, a negative errno value otherwise and rte_errno is set. 242 */ 243 int 244 mlx5_traffic_enable(struct rte_eth_dev *dev) 245 { 246 struct priv *priv = dev->data->dev_private; 247 struct rte_flow_item_eth bcast = { 248 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff", 249 }; 250 struct rte_flow_item_eth ipv6_multi_spec = { 251 .dst.addr_bytes = "\x33\x33\x00\x00\x00\x00", 252 }; 253 struct rte_flow_item_eth ipv6_multi_mask = { 254 .dst.addr_bytes = "\xff\xff\x00\x00\x00\x00", 255 }; 256 struct rte_flow_item_eth unicast = { 257 .src.addr_bytes = "\x00\x00\x00\x00\x00\x00", 258 }; 259 struct rte_flow_item_eth unicast_mask = { 260 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff", 261 }; 262 const unsigned int vlan_filter_n = priv->vlan_filter_n; 263 const struct ether_addr cmp = { 264 .addr_bytes = "\x00\x00\x00\x00\x00\x00", 265 }; 266 unsigned int i; 267 unsigned int j; 268 int ret; 269 270 if (priv->isolated) 271 return 0; 272 if (dev->data->promiscuous) { 273 struct rte_flow_item_eth promisc = { 274 .dst.addr_bytes = "\x00\x00\x00\x00\x00\x00", 275 .src.addr_bytes = "\x00\x00\x00\x00\x00\x00", 276 .type = 0, 277 }; 278 279 ret = mlx5_ctrl_flow(dev, &promisc, &promisc); 280 if (ret) 281 goto error; 282 } 283 if (dev->data->all_multicast) { 284 struct rte_flow_item_eth multicast = { 285 .dst.addr_bytes = "\x01\x00\x00\x00\x00\x00", 286 .src.addr_bytes = "\x00\x00\x00\x00\x00\x00", 287 .type = 0, 288 }; 289 290 ret = mlx5_ctrl_flow(dev, &multicast, &multicast); 291 if (ret) 292 goto error; 293 } else { 294 /* Add broadcast/multicast flows. */ 295 for (i = 0; i != vlan_filter_n; ++i) { 296 uint16_t vlan = priv->vlan_filter[i]; 297 298 struct rte_flow_item_vlan vlan_spec = { 299 .tci = rte_cpu_to_be_16(vlan), 300 }; 301 struct rte_flow_item_vlan vlan_mask = { 302 .tci = 0xffff, 303 }; 304 305 ret = mlx5_ctrl_flow_vlan(dev, &bcast, &bcast, 306 &vlan_spec, &vlan_mask); 307 if (ret) 308 goto error; 309 ret = mlx5_ctrl_flow_vlan(dev, &ipv6_multi_spec, 310 &ipv6_multi_mask, 311 &vlan_spec, &vlan_mask); 312 if (ret) 313 goto error; 314 } 315 if (!vlan_filter_n) { 316 ret = mlx5_ctrl_flow(dev, &bcast, &bcast); 317 if (ret) 318 goto error; 319 ret = mlx5_ctrl_flow(dev, &ipv6_multi_spec, 320 &ipv6_multi_mask); 321 if (ret) 322 goto error; 323 } 324 } 325 /* Add MAC address flows. */ 326 for (i = 0; i != MLX5_MAX_MAC_ADDRESSES; ++i) { 327 struct ether_addr *mac = &dev->data->mac_addrs[i]; 328 329 if (!memcmp(mac, &cmp, sizeof(*mac))) 330 continue; 331 memcpy(&unicast.dst.addr_bytes, 332 mac->addr_bytes, 333 ETHER_ADDR_LEN); 334 for (j = 0; j != vlan_filter_n; ++j) { 335 uint16_t vlan = priv->vlan_filter[j]; 336 337 struct rte_flow_item_vlan vlan_spec = { 338 .tci = rte_cpu_to_be_16(vlan), 339 }; 340 struct rte_flow_item_vlan vlan_mask = { 341 .tci = 0xffff, 342 }; 343 344 ret = mlx5_ctrl_flow_vlan(dev, &unicast, 345 &unicast_mask, 346 &vlan_spec, 347 &vlan_mask); 348 if (ret) 349 goto error; 350 } 351 if (!vlan_filter_n) { 352 ret = mlx5_ctrl_flow(dev, &unicast, &unicast_mask); 353 if (ret) 354 goto error; 355 } 356 } 357 return 0; 358 error: 359 ret = rte_errno; /* Save rte_errno before cleanup. */ 360 mlx5_flow_list_flush(dev, &priv->ctrl_flows); 361 rte_errno = ret; /* Restore rte_errno. */ 362 return -rte_errno; 363 } 364 365 366 /** 367 * Disable traffic flows configured by control plane 368 * 369 * @param dev 370 * Pointer to Ethernet device private data. 371 */ 372 void 373 mlx5_traffic_disable(struct rte_eth_dev *dev) 374 { 375 struct priv *priv = dev->data->dev_private; 376 377 mlx5_flow_list_flush(dev, &priv->ctrl_flows); 378 } 379 380 /** 381 * Restart traffic flows configured by control plane 382 * 383 * @param dev 384 * Pointer to Ethernet device private data. 385 * 386 * @return 387 * 0 on success, a negative errno value otherwise and rte_errno is set. 388 */ 389 int 390 mlx5_traffic_restart(struct rte_eth_dev *dev) 391 { 392 if (dev->data->dev_started) { 393 mlx5_traffic_disable(dev); 394 return mlx5_traffic_enable(dev); 395 } 396 return 0; 397 } 398