drivers/net/mlx5/mlx5_vlan.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright 2015 6WIND S.A.
   3  * Copyright 2015 Mellanox.
   4  */
   5
   6 #include <stddef.h>
   7 #include <errno.h>
   8 #include <assert.h>
   9 #include <stdint.h>
  10
  11 /* Verbs headers do not support -pedantic. */
  12 #ifdef PEDANTIC
  13 #pragma GCC diagnostic ignored "-Wpedantic"
  14 #endif
  15 #include <infiniband/mlx5dv.h>
  16 #include <infiniband/verbs.h>
  17 #ifdef PEDANTIC
  18 #pragma GCC diagnostic error "-Wpedantic"
  19 #endif
  20
  21 #include <rte_ethdev_driver.h>
  22 #include <rte_common.h>
  23
  24 #include "mlx5_utils.h"
  25 #include "mlx5.h"
  26 #include "mlx5_autoconf.h"
  27 #include "mlx5_glue.h"
  28
  29 /**
  30  * DPDK callback to configure a VLAN filter.
  31  *
  32  * @param dev
  33  *   Pointer to Ethernet device structure.
  34  * @param vlan_id
  35  *   VLAN ID to filter.
  36  * @param on
  37  *   Toggle filter.
  38  *
  39  * @return
  40  *   0 on success, negative errno value on failure.
  41  */
  42 int
  43 mlx5_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
  44 {
  45         struct priv *priv = dev->data->dev_private;
  46         unsigned int i;
  47         int ret = 0;
  48
  49         priv_lock(priv);
  50         DEBUG("%p: %s VLAN filter ID %" PRIu16,
  51               (void *)dev, (on ? "enable" : "disable"), vlan_id);
  52         assert(priv->vlan_filter_n <= RTE_DIM(priv->vlan_filter));
  53         for (i = 0; (i != priv->vlan_filter_n); ++i)
  54                 if (priv->vlan_filter[i] == vlan_id)
  55                         break;
  56         /* Check if there's room for another VLAN filter. */
  57         if (i == RTE_DIM(priv->vlan_filter)) {
  58                 ret = -ENOMEM;
  59                 goto out;
  60         }
  61         if (i < priv->vlan_filter_n) {
  62                 assert(priv->vlan_filter_n != 0);
  63                 /* Enabling an existing VLAN filter has no effect. */
  64                 if (on)
  65                         goto out;
  66                 /* Remove VLAN filter from list. */
  67                 --priv->vlan_filter_n;
  68                 memmove(&priv->vlan_filter[i],
  69                         &priv->vlan_filter[i + 1],
  70                         sizeof(priv->vlan_filter[i]) *
  71                         (priv->vlan_filter_n - i));
  72                 priv->vlan_filter[priv->vlan_filter_n] = 0;
  73         } else {
  74                 assert(i == priv->vlan_filter_n);
  75                 /* Disabling an unknown VLAN filter has no effect. */
  76                 if (!on)
  77                         goto out;
  78                 /* Add new VLAN filter. */
  79                 priv->vlan_filter[priv->vlan_filter_n] = vlan_id;
  80                 ++priv->vlan_filter_n;
  81         }
  82         if (dev->data->dev_started)
  83                 priv_dev_traffic_restart(priv, dev);
  84 out:
  85         priv_unlock(priv);
  86         return ret;
  87 }
  88
  89 /**
  90  * Set/reset VLAN stripping for a specific queue.
  91  *
  92  * @param priv
  93  *   Pointer to private structure.
  94  * @param idx
  95  *   RX queue index.
  96  * @param on
  97  *   Enable/disable VLAN stripping.
  98  */
  99 static void
 100 priv_vlan_strip_queue_set(struct priv *priv, uint16_t idx, int on)
 101 {
 102         struct mlx5_rxq_data *rxq = (*priv->rxqs)[idx];
 103         struct mlx5_rxq_ctrl *rxq_ctrl =
 104                 container_of(rxq, struct mlx5_rxq_ctrl, rxq);
 105         struct ibv_wq_attr mod;
 106         uint16_t vlan_offloads =
 107                 (on ? IBV_WQ_FLAGS_CVLAN_STRIPPING : 0) |
 108                 0;
 109         int err;
 110
 111         DEBUG("set VLAN offloads 0x%x for port %d queue %d",
 112               vlan_offloads, rxq->port_id, idx);
 113         if (!rxq_ctrl->ibv) {
 114                 /* Update related bits in RX queue. */
 115                 rxq->vlan_strip = !!on;
 116                 return;
 117         }
 118         mod = (struct ibv_wq_attr){
 119                 .attr_mask = IBV_WQ_ATTR_FLAGS,
 120                 .flags_mask = IBV_WQ_FLAGS_CVLAN_STRIPPING,
 121                 .flags = vlan_offloads,
 122         };
 123
 124         err = mlx5_glue->modify_wq(rxq_ctrl->ibv->wq, &mod);
 125         if (err) {
 126                 ERROR("%p: failed to modified stripping mode: %s",
 127                       (void *)priv, strerror(err));
 128                 return;
 129         }
 130
 131         /* Update related bits in RX queue. */
 132         rxq->vlan_strip = !!on;
 133 }
 134
 135 /**
 136  * Callback to set/reset VLAN stripping for a specific queue.
 137  *
 138  * @param dev
 139  *   Pointer to Ethernet device structure.
 140  * @param queue
 141  *   RX queue index.
 142  * @param on
 143  *   Enable/disable VLAN stripping.
 144  */
 145 void
 146 mlx5_vlan_strip_queue_set(struct rte_eth_dev *dev, uint16_t queue, int on)
 147 {
 148         struct priv *priv = dev->data->dev_private;
 149
 150         /* Validate hw support */
 151         if (!priv->config.hw_vlan_strip) {
 152                 ERROR("VLAN stripping is not supported");
 153                 return;
 154         }
 155
 156         /* Validate queue number */
 157         if (queue >= priv->rxqs_n) {
 158                 ERROR("VLAN stripping, invalid queue number %d", queue);
 159                 return;
 160         }
 161
 162         priv_lock(priv);
 163         priv_vlan_strip_queue_set(priv, queue, on);
 164         priv_unlock(priv);
 165 }
 166
 167 /**
 168  * Callback to set/reset VLAN offloads for a port.
 169  *
 170  * @param dev
 171  *   Pointer to Ethernet device structure.
 172  * @param mask
 173  *   VLAN offload bit mask.
 174  */
 175 int
 176 mlx5_vlan_offload_set(struct rte_eth_dev *dev, int mask)
 177 {
 178         struct priv *priv = dev->data->dev_private;
 179         unsigned int i;
 180
 181         if (mask & ETH_VLAN_STRIP_MASK) {
 182                 int hw_vlan_strip = !!(dev->data->dev_conf.rxmode.offloads &
 183                                        DEV_RX_OFFLOAD_VLAN_STRIP);
 184
 185                 if (!priv->config.hw_vlan_strip) {
 186                         ERROR("VLAN stripping is not supported");
 187                         return 0;
 188                 }
 189
 190                 /* Run on every RX queue and set/reset VLAN stripping. */
 191                 priv_lock(priv);
 192                 for (i = 0; (i != priv->rxqs_n); i++)
 193                         priv_vlan_strip_queue_set(priv, i, hw_vlan_strip);
 194                 priv_unlock(priv);
 195         }
 196
 197         return 0;
 198 }