ceph/src/seastar/dpdk/drivers/net/mlx5/mlx5_vlan.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 <assert.h>
  37 #include <stdint.h>
  38
  39 /* DPDK headers don't like -pedantic. */
  40 #ifdef PEDANTIC
  41 #pragma GCC diagnostic ignored "-Wpedantic"
  42 #endif
  43 #include <rte_ethdev.h>
  44 #include <rte_common.h>
  45 #ifdef PEDANTIC
  46 #pragma GCC diagnostic error "-Wpedantic"
  47 #endif
  48
  49 #include "mlx5_utils.h"
  50 #include "mlx5.h"
  51 #include "mlx5_autoconf.h"
  52
  53 /**
  54  * Configure a VLAN filter.
  55  *
  56  * @param dev
  57  *   Pointer to Ethernet device structure.
  58  * @param vlan_id
  59  *   VLAN ID to filter.
  60  * @param on
  61  *   Toggle filter.
  62  *
  63  * @return
  64  *   0 on success, errno value on failure.
  65  */
  66 static int
  67 vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
  68 {
  69         struct priv *priv = dev->data->dev_private;
  70         unsigned int i;
  71
  72         DEBUG("%p: %s VLAN filter ID %" PRIu16,
  73               (void *)dev, (on ? "enable" : "disable"), vlan_id);
  74         assert(priv->vlan_filter_n <= RTE_DIM(priv->vlan_filter));
  75         for (i = 0; (i != priv->vlan_filter_n); ++i)
  76                 if (priv->vlan_filter[i] == vlan_id)
  77                         break;
  78         /* Check if there's room for another VLAN filter. */
  79         if (i == RTE_DIM(priv->vlan_filter))
  80                 return ENOMEM;
  81         if (i < priv->vlan_filter_n) {
  82                 assert(priv->vlan_filter_n != 0);
  83                 /* Enabling an existing VLAN filter has no effect. */
  84                 if (on)
  85                         return 0;
  86                 /* Remove VLAN filter from list. */
  87                 --priv->vlan_filter_n;
  88                 memmove(&priv->vlan_filter[i],
  89                         &priv->vlan_filter[i + 1],
  90                         sizeof(priv->vlan_filter[i]) *
  91                         (priv->vlan_filter_n - i));
  92                 priv->vlan_filter[priv->vlan_filter_n] = 0;
  93         } else {
  94                 assert(i == priv->vlan_filter_n);
  95                 /* Disabling an unknown VLAN filter has no effect. */
  96                 if (!on)
  97                         return 0;
  98                 /* Add new VLAN filter. */
  99                 priv->vlan_filter[priv->vlan_filter_n] = vlan_id;
 100                 ++priv->vlan_filter_n;
 101         }
 102         /* Rehash flows in all hash RX queues. */
 103         priv_mac_addrs_disable(priv);
 104         priv_special_flow_disable_all(priv);
 105         return priv_rehash_flows(priv);
 106 }
 107
 108 /**
 109  * DPDK callback to configure a VLAN filter.
 110  *
 111  * @param dev
 112  *   Pointer to Ethernet device structure.
 113  * @param vlan_id
 114  *   VLAN ID to filter.
 115  * @param on
 116  *   Toggle filter.
 117  *
 118  * @return
 119  *   0 on success, negative errno value on failure.
 120  */
 121 int
 122 mlx5_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
 123 {
 124         struct priv *priv = dev->data->dev_private;
 125         int ret;
 126
 127         priv_lock(priv);
 128         ret = vlan_filter_set(dev, vlan_id, on);
 129         priv_unlock(priv);
 130         assert(ret >= 0);
 131         return -ret;
 132 }
 133
 134 /**
 135  * Set/reset VLAN stripping for a specific queue.
 136  *
 137  * @param priv
 138  *   Pointer to private structure.
 139  * @param idx
 140  *   RX queue index.
 141  * @param on
 142  *   Enable/disable VLAN stripping.
 143  */
 144 static void
 145 priv_vlan_strip_queue_set(struct priv *priv, uint16_t idx, int on)
 146 {
 147         struct rxq *rxq = (*priv->rxqs)[idx];
 148         struct rxq_ctrl *rxq_ctrl = container_of(rxq, struct rxq_ctrl, rxq);
 149         struct ibv_exp_wq_attr mod;
 150         uint16_t vlan_offloads =
 151                 (on ? IBV_EXP_RECEIVE_WQ_CVLAN_STRIP : 0) |
 152                 0;
 153         int err;
 154
 155         DEBUG("set VLAN offloads 0x%x for port %d queue %d",
 156               vlan_offloads, rxq->port_id, idx);
 157         mod = (struct ibv_exp_wq_attr){
 158                 .attr_mask = IBV_EXP_WQ_ATTR_VLAN_OFFLOADS,
 159                 .vlan_offloads = vlan_offloads,
 160         };
 161
 162         err = ibv_exp_modify_wq(rxq_ctrl->wq, &mod);
 163         if (err) {
 164                 ERROR("%p: failed to modified stripping mode: %s",
 165                       (void *)priv, strerror(err));
 166                 return;
 167         }
 168
 169         /* Update related bits in RX queue. */
 170         rxq->vlan_strip = !!on;
 171 }
 172
 173 /**
 174  * Callback to set/reset VLAN stripping for a specific queue.
 175  *
 176  * @param dev
 177  *   Pointer to Ethernet device structure.
 178  * @param queue
 179  *   RX queue index.
 180  * @param on
 181  *   Enable/disable VLAN stripping.
 182  */
 183 void
 184 mlx5_vlan_strip_queue_set(struct rte_eth_dev *dev, uint16_t queue, int on)
 185 {
 186         struct priv *priv = dev->data->dev_private;
 187
 188         /* Validate hw support */
 189         if (!priv->hw_vlan_strip) {
 190                 ERROR("VLAN stripping is not supported");
 191                 return;
 192         }
 193
 194         /* Validate queue number */
 195         if (queue >= priv->rxqs_n) {
 196                 ERROR("VLAN stripping, invalid queue number %d", queue);
 197                 return;
 198         }
 199
 200         priv_lock(priv);
 201         priv_vlan_strip_queue_set(priv, queue, on);
 202         priv_unlock(priv);
 203 }
 204
 205 /**
 206  * Callback to set/reset VLAN offloads for a port.
 207  *
 208  * @param dev
 209  *   Pointer to Ethernet device structure.
 210  * @param mask
 211  *   VLAN offload bit mask.
 212  */
 213 void
 214 mlx5_vlan_offload_set(struct rte_eth_dev *dev, int mask)
 215 {
 216         struct priv *priv = dev->data->dev_private;
 217         unsigned int i;
 218
 219         if (mask & ETH_VLAN_STRIP_MASK) {
 220                 int hw_vlan_strip = !!dev->data->dev_conf.rxmode.hw_vlan_strip;
 221
 222                 if (!priv->hw_vlan_strip) {
 223                         ERROR("VLAN stripping is not supported");
 224                         return;
 225                 }
 226
 227                 /* Run on every RX queue and set/reset VLAN stripping. */
 228                 priv_lock(priv);
 229                 for (i = 0; (i != priv->rxqs_n); i++)
 230                         priv_vlan_strip_queue_set(priv, i, hw_vlan_strip);
 231                 priv_unlock(priv);
 232         }
 233 }