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