ceph/src/seastar/dpdk/drivers/net/mlx5/mlx5_trigger.c

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