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 unsigned int idx = 0; 52 struct mlx5_mr *mr; 53 struct mlx5_txq_ctrl *txq_ctrl = mlx5_txq_get(dev, i); 54 55 if (!txq_ctrl) 56 continue; 57 LIST_FOREACH(mr, &priv->mr, next) { 58 mlx5_txq_mp2mr_reg(&txq_ctrl->txq, mr->mp, idx++); 59 if (idx == MLX5_PMD_TX_MP_CACHE) 60 break; 61 } 62 txq_alloc_elts(txq_ctrl); 63 txq_ctrl->ibv = mlx5_txq_ibv_new(dev, i); 64 if (!txq_ctrl->ibv) { 65 rte_errno = ENOMEM; 66 goto error; 67 } 68 } 69 ret = mlx5_tx_uar_remap(dev, priv->ctx->cmd_fd); 70 if (ret) 71 goto error; 72 return 0; 73 error: 74 ret = rte_errno; /* Save rte_errno before cleanup. */ 75 mlx5_txq_stop(dev); 76 rte_errno = ret; /* Restore rte_errno. */ 77 return -rte_errno; 78 } 79 80 /** 81 * Stop traffic on Rx queues. 82 * 83 * @param dev 84 * Pointer to Ethernet device structure. 85 */ 86 static void 87 mlx5_rxq_stop(struct rte_eth_dev *dev) 88 { 89 struct priv *priv = dev->data->dev_private; 90 unsigned int i; 91 92 for (i = 0; i != priv->rxqs_n; ++i) 93 mlx5_rxq_release(dev, i); 94 } 95 96 /** 97 * Start traffic on Rx queues. 98 * 99 * @param dev 100 * Pointer to Ethernet device structure. 101 * 102 * @return 103 * 0 on success, a negative errno value otherwise and rte_errno is set. 104 */ 105 static int 106 mlx5_rxq_start(struct rte_eth_dev *dev) 107 { 108 struct priv *priv = dev->data->dev_private; 109 unsigned int i; 110 int ret = 0; 111 112 for (i = 0; i != priv->rxqs_n; ++i) { 113 struct mlx5_rxq_ctrl *rxq_ctrl = mlx5_rxq_get(dev, i); 114 115 if (!rxq_ctrl) 116 continue; 117 ret = rxq_alloc_elts(rxq_ctrl); 118 if (ret) 119 goto error; 120 rxq_ctrl->ibv = mlx5_rxq_ibv_new(dev, i); 121 if (!rxq_ctrl->ibv) 122 goto error; 123 } 124 return 0; 125 error: 126 ret = rte_errno; /* Save rte_errno before cleanup. */ 127 mlx5_rxq_stop(dev); 128 rte_errno = ret; /* Restore rte_errno. */ 129 return -rte_errno; 130 } 131 132 /** 133 * DPDK callback to start the device. 134 * 135 * Simulate device start by attaching all configured flows. 136 * 137 * @param dev 138 * Pointer to Ethernet device structure. 139 * 140 * @return 141 * 0 on success, a negative errno value otherwise and rte_errno is set. 142 */ 143 int 144 mlx5_dev_start(struct rte_eth_dev *dev) 145 { 146 struct priv *priv = dev->data->dev_private; 147 struct mlx5_mr *mr = NULL; 148 int ret; 149 150 dev->data->dev_started = 1; 151 DRV_LOG(DEBUG, "port %u allocating and configuring hash Rx queues", 152 dev->data->port_id); 153 rte_mempool_walk(mlx5_mp2mr_iter, priv); 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 ret = mlx5_rx_intr_vec_enable(dev); 167 if (ret) { 168 DRV_LOG(ERR, "port %u Rx interrupt vector creation failed", 169 dev->data->port_id); 170 goto error; 171 } 172 mlx5_xstats_init(dev); 173 ret = mlx5_traffic_enable(dev); 174 if (ret) { 175 DRV_LOG(DEBUG, "port %u failed to set defaults flows", 176 dev->data->port_id); 177 goto error; 178 } 179 ret = mlx5_flow_start(dev, &priv->flows); 180 if (ret) { 181 DRV_LOG(DEBUG, "port %u failed to set flows", 182 dev->data->port_id); 183 goto error; 184 } 185 dev->tx_pkt_burst = mlx5_select_tx_function(dev); 186 dev->rx_pkt_burst = mlx5_select_rx_function(dev); 187 mlx5_dev_interrupt_handler_install(dev); 188 return 0; 189 error: 190 ret = rte_errno; /* Save rte_errno before cleanup. */ 191 /* Rollback. */ 192 dev->data->dev_started = 0; 193 for (mr = LIST_FIRST(&priv->mr); mr; mr = LIST_FIRST(&priv->mr)) 194 mlx5_mr_release(mr); 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 struct mlx5_mr *mr; 216 217 dev->data->dev_started = 0; 218 /* Prevent crashes when queues are still in use. */ 219 dev->rx_pkt_burst = removed_rx_burst; 220 dev->tx_pkt_burst = removed_tx_burst; 221 rte_wmb(); 222 usleep(1000 * priv->rxqs_n); 223 DRV_LOG(DEBUG, "port %u cleaning up and destroying hash Rx queues", 224 dev->data->port_id); 225 mlx5_flow_stop(dev, &priv->flows); 226 mlx5_traffic_disable(dev); 227 mlx5_rx_intr_vec_disable(dev); 228 mlx5_dev_interrupt_handler_uninstall(dev); 229 mlx5_txq_stop(dev); 230 mlx5_rxq_stop(dev); 231 for (mr = LIST_FIRST(&priv->mr); mr; mr = LIST_FIRST(&priv->mr)) 232 mlx5_mr_release(mr); 233 } 234 235 /** 236 * Enable traffic flows configured by control plane 237 * 238 * @param dev 239 * Pointer to Ethernet device private data. 240 * @param dev 241 * Pointer to Ethernet device structure. 242 * 243 * @return 244 * 0 on success, a negative errno value otherwise and rte_errno is set. 245 */ 246 int 247 mlx5_traffic_enable(struct rte_eth_dev *dev) 248 { 249 struct priv *priv = dev->data->dev_private; 250 struct rte_flow_item_eth bcast = { 251 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff", 252 }; 253 struct rte_flow_item_eth ipv6_multi_spec = { 254 .dst.addr_bytes = "\x33\x33\x00\x00\x00\x00", 255 }; 256 struct rte_flow_item_eth ipv6_multi_mask = { 257 .dst.addr_bytes = "\xff\xff\x00\x00\x00\x00", 258 }; 259 struct rte_flow_item_eth unicast = { 260 .src.addr_bytes = "\x00\x00\x00\x00\x00\x00", 261 }; 262 struct rte_flow_item_eth unicast_mask = { 263 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff", 264 }; 265 const unsigned int vlan_filter_n = priv->vlan_filter_n; 266 const struct ether_addr cmp = { 267 .addr_bytes = "\x00\x00\x00\x00\x00\x00", 268 }; 269 unsigned int i; 270 unsigned int j; 271 int ret; 272 273 if (priv->isolated) 274 return 0; 275 if (dev->data->promiscuous) { 276 struct rte_flow_item_eth promisc = { 277 .dst.addr_bytes = "\x00\x00\x00\x00\x00\x00", 278 .src.addr_bytes = "\x00\x00\x00\x00\x00\x00", 279 .type = 0, 280 }; 281 282 ret = mlx5_ctrl_flow(dev, &promisc, &promisc); 283 if (ret) 284 goto error; 285 } 286 if (dev->data->all_multicast) { 287 struct rte_flow_item_eth multicast = { 288 .dst.addr_bytes = "\x01\x00\x00\x00\x00\x00", 289 .src.addr_bytes = "\x00\x00\x00\x00\x00\x00", 290 .type = 0, 291 }; 292 293 ret = mlx5_ctrl_flow(dev, &multicast, &multicast); 294 if (ret) 295 goto error; 296 } else { 297 /* Add broadcast/multicast flows. */ 298 for (i = 0; i != vlan_filter_n; ++i) { 299 uint16_t vlan = priv->vlan_filter[i]; 300 301 struct rte_flow_item_vlan vlan_spec = { 302 .tci = rte_cpu_to_be_16(vlan), 303 }; 304 struct rte_flow_item_vlan vlan_mask = { 305 .tci = 0xffff, 306 }; 307 308 ret = mlx5_ctrl_flow_vlan(dev, &bcast, &bcast, 309 &vlan_spec, &vlan_mask); 310 if (ret) 311 goto error; 312 ret = mlx5_ctrl_flow_vlan(dev, &ipv6_multi_spec, 313 &ipv6_multi_mask, 314 &vlan_spec, &vlan_mask); 315 if (ret) 316 goto error; 317 } 318 if (!vlan_filter_n) { 319 ret = mlx5_ctrl_flow(dev, &bcast, &bcast); 320 if (ret) 321 goto error; 322 ret = mlx5_ctrl_flow(dev, &ipv6_multi_spec, 323 &ipv6_multi_mask); 324 if (ret) 325 goto error; 326 } 327 } 328 /* Add MAC address flows. */ 329 for (i = 0; i != MLX5_MAX_MAC_ADDRESSES; ++i) { 330 struct ether_addr *mac = &dev->data->mac_addrs[i]; 331 332 if (!memcmp(mac, &cmp, sizeof(*mac))) 333 continue; 334 memcpy(&unicast.dst.addr_bytes, 335 mac->addr_bytes, 336 ETHER_ADDR_LEN); 337 for (j = 0; j != vlan_filter_n; ++j) { 338 uint16_t vlan = priv->vlan_filter[j]; 339 340 struct rte_flow_item_vlan vlan_spec = { 341 .tci = rte_cpu_to_be_16(vlan), 342 }; 343 struct rte_flow_item_vlan vlan_mask = { 344 .tci = 0xffff, 345 }; 346 347 ret = mlx5_ctrl_flow_vlan(dev, &unicast, 348 &unicast_mask, 349 &vlan_spec, 350 &vlan_mask); 351 if (ret) 352 goto error; 353 } 354 if (!vlan_filter_n) { 355 ret = mlx5_ctrl_flow(dev, &unicast, &unicast_mask); 356 if (ret) 357 goto error; 358 } 359 } 360 return 0; 361 error: 362 ret = rte_errno; /* Save rte_errno before cleanup. */ 363 mlx5_flow_list_flush(dev, &priv->ctrl_flows); 364 rte_errno = ret; /* Restore rte_errno. */ 365 return -rte_errno; 366 } 367 368 369 /** 370 * Disable traffic flows configured by control plane 371 * 372 * @param dev 373 * Pointer to Ethernet device private data. 374 */ 375 void 376 mlx5_traffic_disable(struct rte_eth_dev *dev) 377 { 378 struct priv *priv = dev->data->dev_private; 379 380 mlx5_flow_list_flush(dev, &priv->ctrl_flows); 381 } 382 383 /** 384 * Restart traffic flows configured by control plane 385 * 386 * @param dev 387 * Pointer to Ethernet device private data. 388 * 389 * @return 390 * 0 on success, a negative errno value otherwise and rte_errno is set. 391 */ 392 int 393 mlx5_traffic_restart(struct rte_eth_dev *dev) 394 { 395 if (dev->data->dev_started) { 396 mlx5_traffic_disable(dev); 397 return mlx5_traffic_enable(dev); 398 } 399 return 0; 400 } 401