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 /* Allocate/reuse/resize mempool for Multi-Packet RQ. */ 106 if (mlx5_mprq_alloc_mp(dev)) 107 goto error; 108 for (i = 0; i != priv->rxqs_n; ++i) { 109 struct mlx5_rxq_ctrl *rxq_ctrl = mlx5_rxq_get(dev, i); 110 struct rte_mempool *mp; 111 112 if (!rxq_ctrl) 113 continue; 114 /* Pre-register Rx mempool. */ 115 mp = mlx5_rxq_mprq_enabled(&rxq_ctrl->rxq) ? 116 rxq_ctrl->rxq.mprq_mp : rxq_ctrl->rxq.mp; 117 DRV_LOG(DEBUG, 118 "port %u Rx queue %u registering" 119 " mp %s having %u chunks", 120 dev->data->port_id, rxq_ctrl->idx, 121 mp->name, mp->nb_mem_chunks); 122 mlx5_mr_update_mp(dev, &rxq_ctrl->rxq.mr_ctrl, mp); 123 ret = rxq_alloc_elts(rxq_ctrl); 124 if (ret) 125 goto error; 126 rxq_ctrl->ibv = mlx5_rxq_ibv_new(dev, i); 127 if (!rxq_ctrl->ibv) 128 goto error; 129 } 130 return 0; 131 error: 132 ret = rte_errno; /* Save rte_errno before cleanup. */ 133 mlx5_rxq_stop(dev); 134 rte_errno = ret; /* Restore rte_errno. */ 135 return -rte_errno; 136 } 137 138 /** 139 * DPDK callback to start the device. 140 * 141 * Simulate device start by attaching all configured flows. 142 * 143 * @param dev 144 * Pointer to Ethernet device structure. 145 * 146 * @return 147 * 0 on success, a negative errno value otherwise and rte_errno is set. 148 */ 149 int 150 mlx5_dev_start(struct rte_eth_dev *dev) 151 { 152 struct priv *priv = dev->data->dev_private; 153 int ret; 154 155 dev->data->dev_started = 1; 156 DRV_LOG(DEBUG, "port %u allocating and configuring hash Rx queues", 157 dev->data->port_id); 158 ret = mlx5_txq_start(dev); 159 if (ret) { 160 DRV_LOG(ERR, "port %u Tx queue allocation failed: %s", 161 dev->data->port_id, strerror(rte_errno)); 162 goto error; 163 } 164 ret = mlx5_rxq_start(dev); 165 if (ret) { 166 DRV_LOG(ERR, "port %u Rx queue allocation failed: %s", 167 dev->data->port_id, strerror(rte_errno)); 168 goto error; 169 } 170 ret = mlx5_rx_intr_vec_enable(dev); 171 if (ret) { 172 DRV_LOG(ERR, "port %u Rx interrupt vector creation failed", 173 dev->data->port_id); 174 goto error; 175 } 176 mlx5_xstats_init(dev); 177 ret = mlx5_traffic_enable(dev); 178 if (ret) { 179 DRV_LOG(DEBUG, "port %u failed to set defaults flows", 180 dev->data->port_id); 181 goto error; 182 } 183 ret = mlx5_flow_start(dev, &priv->flows); 184 if (ret) { 185 DRV_LOG(DEBUG, "port %u failed to set flows", 186 dev->data->port_id); 187 goto error; 188 } 189 dev->tx_pkt_burst = mlx5_select_tx_function(dev); 190 dev->rx_pkt_burst = mlx5_select_rx_function(dev); 191 mlx5_dev_interrupt_handler_install(dev); 192 return 0; 193 error: 194 ret = rte_errno; /* Save rte_errno before cleanup. */ 195 /* Rollback. */ 196 dev->data->dev_started = 0; 197 mlx5_flow_stop(dev, &priv->flows); 198 mlx5_traffic_disable(dev); 199 mlx5_txq_stop(dev); 200 mlx5_rxq_stop(dev); 201 rte_errno = ret; /* Restore rte_errno. */ 202 return -rte_errno; 203 } 204 205 /** 206 * DPDK callback to stop the device. 207 * 208 * Simulate device stop by detaching all configured flows. 209 * 210 * @param dev 211 * Pointer to Ethernet device structure. 212 */ 213 void 214 mlx5_dev_stop(struct rte_eth_dev *dev) 215 { 216 struct priv *priv = dev->data->dev_private; 217 218 dev->data->dev_started = 0; 219 /* Prevent crashes when queues are still in use. */ 220 dev->rx_pkt_burst = removed_rx_burst; 221 dev->tx_pkt_burst = removed_tx_burst; 222 rte_wmb(); 223 usleep(1000 * priv->rxqs_n); 224 DRV_LOG(DEBUG, "port %u cleaning up and destroying hash Rx queues", 225 dev->data->port_id); 226 mlx5_flow_stop(dev, &priv->flows); 227 mlx5_traffic_disable(dev); 228 mlx5_rx_intr_vec_disable(dev); 229 mlx5_dev_interrupt_handler_uninstall(dev); 230 mlx5_txq_stop(dev); 231 mlx5_rxq_stop(dev); 232 } 233 234 /** 235 * Enable traffic flows configured by control plane 236 * 237 * @param dev 238 * Pointer to Ethernet device private data. 239 * @param dev 240 * Pointer to Ethernet device structure. 241 * 242 * @return 243 * 0 on success, a negative errno value otherwise and rte_errno is set. 244 */ 245 int 246 mlx5_traffic_enable(struct rte_eth_dev *dev) 247 { 248 struct priv *priv = dev->data->dev_private; 249 struct rte_flow_item_eth bcast = { 250 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff", 251 }; 252 struct rte_flow_item_eth ipv6_multi_spec = { 253 .dst.addr_bytes = "\x33\x33\x00\x00\x00\x00", 254 }; 255 struct rte_flow_item_eth ipv6_multi_mask = { 256 .dst.addr_bytes = "\xff\xff\x00\x00\x00\x00", 257 }; 258 struct rte_flow_item_eth unicast = { 259 .src.addr_bytes = "\x00\x00\x00\x00\x00\x00", 260 }; 261 struct rte_flow_item_eth unicast_mask = { 262 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff", 263 }; 264 const unsigned int vlan_filter_n = priv->vlan_filter_n; 265 const struct ether_addr cmp = { 266 .addr_bytes = "\x00\x00\x00\x00\x00\x00", 267 }; 268 unsigned int i; 269 unsigned int j; 270 int ret; 271 272 if (priv->isolated) 273 return 0; 274 if (dev->data->promiscuous) { 275 struct rte_flow_item_eth promisc = { 276 .dst.addr_bytes = "\x00\x00\x00\x00\x00\x00", 277 .src.addr_bytes = "\x00\x00\x00\x00\x00\x00", 278 .type = 0, 279 }; 280 281 ret = mlx5_ctrl_flow(dev, &promisc, &promisc); 282 if (ret) 283 goto error; 284 } 285 if (dev->data->all_multicast) { 286 struct rte_flow_item_eth multicast = { 287 .dst.addr_bytes = "\x01\x00\x00\x00\x00\x00", 288 .src.addr_bytes = "\x00\x00\x00\x00\x00\x00", 289 .type = 0, 290 }; 291 292 ret = mlx5_ctrl_flow(dev, &multicast, &multicast); 293 if (ret) 294 goto error; 295 } else { 296 /* Add broadcast/multicast flows. */ 297 for (i = 0; i != vlan_filter_n; ++i) { 298 uint16_t vlan = priv->vlan_filter[i]; 299 300 struct rte_flow_item_vlan vlan_spec = { 301 .tci = rte_cpu_to_be_16(vlan), 302 }; 303 struct rte_flow_item_vlan vlan_mask = { 304 .tci = 0xffff, 305 }; 306 307 ret = mlx5_ctrl_flow_vlan(dev, &bcast, &bcast, 308 &vlan_spec, &vlan_mask); 309 if (ret) 310 goto error; 311 ret = mlx5_ctrl_flow_vlan(dev, &ipv6_multi_spec, 312 &ipv6_multi_mask, 313 &vlan_spec, &vlan_mask); 314 if (ret) 315 goto error; 316 } 317 if (!vlan_filter_n) { 318 ret = mlx5_ctrl_flow(dev, &bcast, &bcast); 319 if (ret) 320 goto error; 321 ret = mlx5_ctrl_flow(dev, &ipv6_multi_spec, 322 &ipv6_multi_mask); 323 if (ret) 324 goto error; 325 } 326 } 327 /* Add MAC address flows. */ 328 for (i = 0; i != MLX5_MAX_MAC_ADDRESSES; ++i) { 329 struct ether_addr *mac = &dev->data->mac_addrs[i]; 330 331 if (!memcmp(mac, &cmp, sizeof(*mac))) 332 continue; 333 memcpy(&unicast.dst.addr_bytes, 334 mac->addr_bytes, 335 ETHER_ADDR_LEN); 336 for (j = 0; j != vlan_filter_n; ++j) { 337 uint16_t vlan = priv->vlan_filter[j]; 338 339 struct rte_flow_item_vlan vlan_spec = { 340 .tci = rte_cpu_to_be_16(vlan), 341 }; 342 struct rte_flow_item_vlan vlan_mask = { 343 .tci = 0xffff, 344 }; 345 346 ret = mlx5_ctrl_flow_vlan(dev, &unicast, 347 &unicast_mask, 348 &vlan_spec, 349 &vlan_mask); 350 if (ret) 351 goto error; 352 } 353 if (!vlan_filter_n) { 354 ret = mlx5_ctrl_flow(dev, &unicast, &unicast_mask); 355 if (ret) 356 goto error; 357 } 358 } 359 return 0; 360 error: 361 ret = rte_errno; /* Save rte_errno before cleanup. */ 362 mlx5_flow_list_flush(dev, &priv->ctrl_flows); 363 rte_errno = ret; /* Restore rte_errno. */ 364 return -rte_errno; 365 } 366 367 368 /** 369 * Disable traffic flows configured by control plane 370 * 371 * @param dev 372 * Pointer to Ethernet device private data. 373 */ 374 void 375 mlx5_traffic_disable(struct rte_eth_dev *dev) 376 { 377 struct priv *priv = dev->data->dev_private; 378 379 mlx5_flow_list_flush(dev, &priv->ctrl_flows); 380 } 381 382 /** 383 * Restart traffic flows configured by control plane 384 * 385 * @param dev 386 * Pointer to Ethernet device private data. 387 * 388 * @return 389 * 0 on success, a negative errno value otherwise and rte_errno is set. 390 */ 391 int 392 mlx5_traffic_restart(struct rte_eth_dev *dev) 393 { 394 if (dev->data->dev_started) { 395 mlx5_traffic_disable(dev); 396 return mlx5_traffic_enable(dev); 397 } 398 return 0; 399 } 400