drivers/net/mlx5/mlx5_rxmode.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright 2015 6WIND S.A.
   5  *   Copyright 2015 Mellanox.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of 6WIND S.A. nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include <stddef.h>
  35 #include <errno.h>
  36 #include <string.h>
  37
  38 /* Verbs header. */
  39 /* ISO C doesn't support unnamed structs/unions, disabling -pedantic. */
  40 #ifdef PEDANTIC
  41 #pragma GCC diagnostic ignored "-Wpedantic"
  42 #endif
  43 #include <infiniband/verbs.h>
  44 #ifdef PEDANTIC
  45 #pragma GCC diagnostic error "-Wpedantic"
  46 #endif
  47
  48 /* DPDK headers don't like -pedantic. */
  49 #ifdef PEDANTIC
  50 #pragma GCC diagnostic ignored "-Wpedantic"
  51 #endif
  52 #include <rte_ethdev.h>
  53 #ifdef PEDANTIC
  54 #pragma GCC diagnostic error "-Wpedantic"
  55 #endif
  56
  57 #include "mlx5.h"
  58 #include "mlx5_rxtx.h"
  59 #include "mlx5_utils.h"
  60
  61 /* Initialization data for special flows. */
  62 static const struct special_flow_init special_flow_init[] = {
  63         [HASH_RXQ_FLOW_TYPE_PROMISC] = {
  64                 .dst_mac_val = "\x00\x00\x00\x00\x00\x00",
  65                 .dst_mac_mask = "\x00\x00\x00\x00\x00\x00",
  66                 .hash_types =
  67                         1 << HASH_RXQ_TCPV4 |
  68                         1 << HASH_RXQ_UDPV4 |
  69                         1 << HASH_RXQ_IPV4 |
  70                         1 << HASH_RXQ_TCPV6 |
  71                         1 << HASH_RXQ_UDPV6 |
  72                         1 << HASH_RXQ_IPV6 |
  73                         1 << HASH_RXQ_ETH |
  74                         0,
  75                 .per_vlan = 0,
  76         },
  77         [HASH_RXQ_FLOW_TYPE_ALLMULTI] = {
  78                 .dst_mac_val = "\x01\x00\x00\x00\x00\x00",
  79                 .dst_mac_mask = "\x01\x00\x00\x00\x00\x00",
  80                 .hash_types =
  81                         1 << HASH_RXQ_UDPV4 |
  82                         1 << HASH_RXQ_IPV4 |
  83                         1 << HASH_RXQ_UDPV6 |
  84                         1 << HASH_RXQ_IPV6 |
  85                         1 << HASH_RXQ_ETH |
  86                         0,
  87                 .per_vlan = 0,
  88         },
  89         [HASH_RXQ_FLOW_TYPE_BROADCAST] = {
  90                 .dst_mac_val = "\xff\xff\xff\xff\xff\xff",
  91                 .dst_mac_mask = "\xff\xff\xff\xff\xff\xff",
  92                 .hash_types =
  93                         1 << HASH_RXQ_UDPV4 |
  94                         1 << HASH_RXQ_IPV4 |
  95                         1 << HASH_RXQ_UDPV6 |
  96                         1 << HASH_RXQ_IPV6 |
  97                         1 << HASH_RXQ_ETH |
  98                         0,
  99                 .per_vlan = 1,
 100         },
 101         [HASH_RXQ_FLOW_TYPE_IPV6MULTI] = {
 102                 .dst_mac_val = "\x33\x33\x00\x00\x00\x00",
 103                 .dst_mac_mask = "\xff\xff\x00\x00\x00\x00",
 104                 .hash_types =
 105                         1 << HASH_RXQ_UDPV6 |
 106                         1 << HASH_RXQ_IPV6 |
 107                         1 << HASH_RXQ_ETH |
 108                         0,
 109                 .per_vlan = 1,
 110         },
 111 };
 112
 113 /**
 114  * Enable a special flow in a hash RX queue for a given VLAN index.
 115  *
 116  * @param hash_rxq
 117  *   Pointer to hash RX queue structure.
 118  * @param flow_type
 119  *   Special flow type.
 120  * @param vlan_index
 121  *   VLAN index to use.
 122  *
 123  * @return
 124  *   0 on success, errno value on failure.
 125  */
 126 static int
 127 hash_rxq_special_flow_enable_vlan(struct hash_rxq *hash_rxq,
 128                                   enum hash_rxq_flow_type flow_type,
 129                                   unsigned int vlan_index)
 130 {
 131         struct priv *priv = hash_rxq->priv;
 132         struct ibv_exp_flow *flow;
 133         FLOW_ATTR_SPEC_ETH(data, priv_flow_attr(priv, NULL, 0, hash_rxq->type));
 134         struct ibv_exp_flow_attr *attr = &data->attr;
 135         struct ibv_exp_flow_spec_eth *spec = &data->spec;
 136         const uint8_t *mac;
 137         const uint8_t *mask;
 138         unsigned int vlan_enabled = (priv->vlan_filter_n &&
 139                                      special_flow_init[flow_type].per_vlan);
 140         unsigned int vlan_id = priv->vlan_filter[vlan_index];
 141
 142         /* Check if flow is relevant for this hash_rxq. */
 143         if (!(special_flow_init[flow_type].hash_types & (1 << hash_rxq->type)))
 144                 return 0;
 145         /* Check if flow already exists. */
 146         if (hash_rxq->special_flow[flow_type][vlan_index] != NULL)
 147                 return 0;
 148
 149         /*
 150          * No padding must be inserted by the compiler between attr and spec.
 151          * This layout is expected by libibverbs.
 152          */
 153         assert(((uint8_t *)attr + sizeof(*attr)) == (uint8_t *)spec);
 154         priv_flow_attr(priv, attr, sizeof(data), hash_rxq->type);
 155         /* The first specification must be Ethernet. */
 156         assert(spec->type == IBV_EXP_FLOW_SPEC_ETH);
 157         assert(spec->size == sizeof(*spec));
 158
 159         mac = special_flow_init[flow_type].dst_mac_val;
 160         mask = special_flow_init[flow_type].dst_mac_mask;
 161         *spec = (struct ibv_exp_flow_spec_eth){
 162                 .type = IBV_EXP_FLOW_SPEC_ETH,
 163                 .size = sizeof(*spec),
 164                 .val = {
 165                         .dst_mac = {
 166                                 mac[0], mac[1], mac[2],
 167                                 mac[3], mac[4], mac[5],
 168                         },
 169                         .vlan_tag = (vlan_enabled ? htons(vlan_id) : 0),
 170                 },
 171                 .mask = {
 172                         .dst_mac = {
 173                                 mask[0], mask[1], mask[2],
 174                                 mask[3], mask[4], mask[5],
 175                         },
 176                         .vlan_tag = (vlan_enabled ? htons(0xfff) : 0),
 177                 },
 178         };
 179
 180         errno = 0;
 181         flow = ibv_exp_create_flow(hash_rxq->qp, attr);
 182         if (flow == NULL) {
 183                 /* It's not clear whether errno is always set in this case. */
 184                 ERROR("%p: flow configuration failed, errno=%d: %s",
 185                       (void *)hash_rxq, errno,
 186                       (errno ? strerror(errno) : "Unknown error"));
 187                 if (errno)
 188                         return errno;
 189                 return EINVAL;
 190         }
 191         hash_rxq->special_flow[flow_type][vlan_index] = flow;
 192         DEBUG("%p: special flow %s (index %d) VLAN %u (index %u) enabled",
 193               (void *)hash_rxq, hash_rxq_flow_type_str(flow_type), flow_type,
 194               vlan_id, vlan_index);
 195         return 0;
 196 }
 197
 198 /**
 199  * Disable a special flow in a hash RX queue for a given VLAN index.
 200  *
 201  * @param hash_rxq
 202  *   Pointer to hash RX queue structure.
 203  * @param flow_type
 204  *   Special flow type.
 205  * @param vlan_index
 206  *   VLAN index to use.
 207  */
 208 static void
 209 hash_rxq_special_flow_disable_vlan(struct hash_rxq *hash_rxq,
 210                                    enum hash_rxq_flow_type flow_type,
 211                                    unsigned int vlan_index)
 212 {
 213         struct ibv_exp_flow *flow =
 214                 hash_rxq->special_flow[flow_type][vlan_index];
 215
 216         if (flow == NULL)
 217                 return;
 218         claim_zero(ibv_exp_destroy_flow(flow));
 219         hash_rxq->special_flow[flow_type][vlan_index] = NULL;
 220         DEBUG("%p: special flow %s (index %d) VLAN %u (index %u) disabled",
 221               (void *)hash_rxq, hash_rxq_flow_type_str(flow_type), flow_type,
 222               hash_rxq->priv->vlan_filter[vlan_index], vlan_index);
 223 }
 224
 225 /**
 226  * Enable a special flow in a hash RX queue.
 227  *
 228  * @param hash_rxq
 229  *   Pointer to hash RX queue structure.
 230  * @param flow_type
 231  *   Special flow type.
 232  * @param vlan_index
 233  *   VLAN index to use.
 234  *
 235  * @return
 236  *   0 on success, errno value on failure.
 237  */
 238 static int
 239 hash_rxq_special_flow_enable(struct hash_rxq *hash_rxq,
 240                              enum hash_rxq_flow_type flow_type)
 241 {
 242         struct priv *priv = hash_rxq->priv;
 243         unsigned int i = 0;
 244         int ret;
 245
 246         assert((unsigned int)flow_type < RTE_DIM(hash_rxq->special_flow));
 247         assert(RTE_DIM(hash_rxq->special_flow[flow_type]) ==
 248                RTE_DIM(priv->vlan_filter));
 249         /* Add a special flow for each VLAN filter when relevant. */
 250         do {
 251                 ret = hash_rxq_special_flow_enable_vlan(hash_rxq, flow_type, i);
 252                 if (ret) {
 253                         /* Failure, rollback. */
 254                         while (i != 0)
 255                                 hash_rxq_special_flow_disable_vlan(hash_rxq,
 256                                                                    flow_type,
 257                                                                    --i);
 258                         return ret;
 259                 }
 260         } while (special_flow_init[flow_type].per_vlan &&
 261                  ++i < priv->vlan_filter_n);
 262         return 0;
 263 }
 264
 265 /**
 266  * Disable a special flow in a hash RX queue.
 267  *
 268  * @param hash_rxq
 269  *   Pointer to hash RX queue structure.
 270  * @param flow_type
 271  *   Special flow type.
 272  */
 273 static void
 274 hash_rxq_special_flow_disable(struct hash_rxq *hash_rxq,
 275                               enum hash_rxq_flow_type flow_type)
 276 {
 277         unsigned int i;
 278
 279         assert((unsigned int)flow_type < RTE_DIM(hash_rxq->special_flow));
 280         for (i = 0; (i != RTE_DIM(hash_rxq->special_flow[flow_type])); ++i)
 281                 hash_rxq_special_flow_disable_vlan(hash_rxq, flow_type, i);
 282 }
 283
 284 /**
 285  * Enable a special flow in all hash RX queues.
 286  *
 287  * @param priv
 288  *   Private structure.
 289  * @param flow_type
 290  *   Special flow type.
 291  *
 292  * @return
 293  *   0 on success, errno value on failure.
 294  */
 295 int
 296 priv_special_flow_enable(struct priv *priv, enum hash_rxq_flow_type flow_type)
 297 {
 298         unsigned int i;
 299
 300         if (!priv_allow_flow_type(priv, flow_type))
 301                 return 0;
 302         for (i = 0; (i != priv->hash_rxqs_n); ++i) {
 303                 struct hash_rxq *hash_rxq = &(*priv->hash_rxqs)[i];
 304                 int ret;
 305
 306                 ret = hash_rxq_special_flow_enable(hash_rxq, flow_type);
 307                 if (!ret)
 308                         continue;
 309                 /* Failure, rollback. */
 310                 while (i != 0) {
 311                         hash_rxq = &(*priv->hash_rxqs)[--i];
 312                         hash_rxq_special_flow_disable(hash_rxq, flow_type);
 313                 }
 314                 return ret;
 315         }
 316         return 0;
 317 }
 318
 319 /**
 320  * Disable a special flow in all hash RX queues.
 321  *
 322  * @param priv
 323  *   Private structure.
 324  * @param flow_type
 325  *   Special flow type.
 326  */
 327 void
 328 priv_special_flow_disable(struct priv *priv, enum hash_rxq_flow_type flow_type)
 329 {
 330         unsigned int i;
 331
 332         for (i = 0; (i != priv->hash_rxqs_n); ++i) {
 333                 struct hash_rxq *hash_rxq = &(*priv->hash_rxqs)[i];
 334
 335                 hash_rxq_special_flow_disable(hash_rxq, flow_type);
 336         }
 337 }
 338
 339 /**
 340  * Enable all special flows in all hash RX queues.
 341  *
 342  * @param priv
 343  *   Private structure.
 344  */
 345 int
 346 priv_special_flow_enable_all(struct priv *priv)
 347 {
 348         enum hash_rxq_flow_type flow_type;
 349
 350         if (priv->isolated)
 351                 return 0;
 352         for (flow_type = HASH_RXQ_FLOW_TYPE_PROMISC;
 353                         flow_type != HASH_RXQ_FLOW_TYPE_MAC;
 354                         ++flow_type) {
 355                 int ret;
 356
 357                 ret = priv_special_flow_enable(priv, flow_type);
 358                 if (!ret)
 359                         continue;
 360                 /* Failure, rollback. */
 361                 while (flow_type)
 362                         priv_special_flow_disable(priv, --flow_type);
 363                 return ret;
 364         }
 365         return 0;
 366 }
 367
 368 /**
 369  * Disable all special flows in all hash RX queues.
 370  *
 371  * @param priv
 372  *   Private structure.
 373  */
 374 void
 375 priv_special_flow_disable_all(struct priv *priv)
 376 {
 377         enum hash_rxq_flow_type flow_type;
 378
 379         for (flow_type = HASH_RXQ_FLOW_TYPE_PROMISC;
 380                         flow_type != HASH_RXQ_FLOW_TYPE_MAC;
 381                         ++flow_type)
 382                 priv_special_flow_disable(priv, flow_type);
 383 }
 384
 385 /**
 386  * DPDK callback to enable promiscuous mode.
 387  *
 388  * @param dev
 389  *   Pointer to Ethernet device structure.
 390  */
 391 void
 392 mlx5_promiscuous_enable(struct rte_eth_dev *dev)
 393 {
 394         struct priv *priv = dev->data->dev_private;
 395         int ret;
 396
 397         if (mlx5_is_secondary())
 398                 return;
 399
 400         priv_lock(priv);
 401         priv->promisc_req = 1;
 402         ret = priv_rehash_flows(priv);
 403         if (ret)
 404                 ERROR("error while enabling promiscuous mode: %s",
 405                       strerror(ret));
 406         priv_unlock(priv);
 407 }
 408
 409 /**
 410  * DPDK callback to disable promiscuous mode.
 411  *
 412  * @param dev
 413  *   Pointer to Ethernet device structure.
 414  */
 415 void
 416 mlx5_promiscuous_disable(struct rte_eth_dev *dev)
 417 {
 418         struct priv *priv = dev->data->dev_private;
 419         int ret;
 420
 421         if (mlx5_is_secondary())
 422                 return;
 423
 424         priv_lock(priv);
 425         priv->promisc_req = 0;
 426         ret = priv_rehash_flows(priv);
 427         if (ret)
 428                 ERROR("error while disabling promiscuous mode: %s",
 429                       strerror(ret));
 430         priv_unlock(priv);
 431 }
 432
 433 /**
 434  * DPDK callback to enable allmulti mode.
 435  *
 436  * @param dev
 437  *   Pointer to Ethernet device structure.
 438  */
 439 void
 440 mlx5_allmulticast_enable(struct rte_eth_dev *dev)
 441 {
 442         struct priv *priv = dev->data->dev_private;
 443         int ret;
 444
 445         if (mlx5_is_secondary())
 446                 return;
 447
 448         priv_lock(priv);
 449         priv->allmulti_req = 1;
 450         ret = priv_rehash_flows(priv);
 451         if (ret)
 452                 ERROR("error while enabling allmulticast mode: %s",
 453                       strerror(ret));
 454         priv_unlock(priv);
 455 }
 456
 457 /**
 458  * DPDK callback to disable allmulti mode.
 459  *
 460  * @param dev
 461  *   Pointer to Ethernet device structure.
 462  */
 463 void
 464 mlx5_allmulticast_disable(struct rte_eth_dev *dev)
 465 {
 466         struct priv *priv = dev->data->dev_private;
 467         int ret;
 468
 469         if (mlx5_is_secondary())
 470                 return;
 471
 472         priv_lock(priv);
 473         priv->allmulti_req = 0;
 474         ret = priv_rehash_flows(priv);
 475         if (ret)
 476                 ERROR("error while disabling allmulticast mode: %s",
 477                       strerror(ret));
 478         priv_unlock(priv);
 479 }