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, a negative errno value otherwise and rte_errno is set.
  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
  48         DRV_LOG(DEBUG, "port %u %s VLAN filter ID %" PRIu16,
  49                 dev->data->port_id, (on ? "enable" : "disable"), vlan_id);
  50         assert(priv->vlan_filter_n <= RTE_DIM(priv->vlan_filter));
  51         for (i = 0; (i != priv->vlan_filter_n); ++i)
  52                 if (priv->vlan_filter[i] == vlan_id)
  53                         break;
  54         /* Check if there's room for another VLAN filter. */
  55         if (i == RTE_DIM(priv->vlan_filter)) {
  56                 rte_errno = ENOMEM;
  57                 return -rte_errno;
  58         }
  59         if (i < priv->vlan_filter_n) {
  60                 assert(priv->vlan_filter_n != 0);
  61                 /* Enabling an existing VLAN filter has no effect. */
  62                 if (on)
  63                         goto out;
  64                 /* Remove VLAN filter from list. */
  65                 --priv->vlan_filter_n;
  66                 memmove(&priv->vlan_filter[i],
  67                         &priv->vlan_filter[i + 1],
  68                         sizeof(priv->vlan_filter[i]) *
  69                         (priv->vlan_filter_n - i));
  70                 priv->vlan_filter[priv->vlan_filter_n] = 0;
  71         } else {
  72                 assert(i == priv->vlan_filter_n);
  73                 /* Disabling an unknown VLAN filter has no effect. */
  74                 if (!on)
  75                         goto out;
  76                 /* Add new VLAN filter. */
  77                 priv->vlan_filter[priv->vlan_filter_n] = vlan_id;
  78                 ++priv->vlan_filter_n;
  79         }
  80 out:
  81         if (dev->data->dev_started)
  82                 return mlx5_traffic_restart(dev);
  83         return 0;
  84 }
  85
  86 /**
  87  * Callback to set/reset VLAN stripping for a specific queue.
  88  *
  89  * @param dev
  90  *   Pointer to Ethernet device structure.
  91  * @param queue
  92  *   RX queue index.
  93  * @param on
  94  *   Enable/disable VLAN stripping.
  95  */
  96 void
  97 mlx5_vlan_strip_queue_set(struct rte_eth_dev *dev, uint16_t queue, int on)
  98 {
  99         struct priv *priv = dev->data->dev_private;
 100         struct mlx5_rxq_data *rxq = (*priv->rxqs)[queue];
 101         struct mlx5_rxq_ctrl *rxq_ctrl =
 102                 container_of(rxq, struct mlx5_rxq_ctrl, rxq);
 103         struct ibv_wq_attr mod;
 104         uint16_t vlan_offloads =
 105                 (on ? IBV_WQ_FLAGS_CVLAN_STRIPPING : 0) |
 106                 0;
 107         int ret;
 108
 109         /* Validate hw support */
 110         if (!priv->config.hw_vlan_strip) {
 111                 DRV_LOG(ERR, "port %u VLAN stripping is not supported",
 112                         dev->data->port_id);
 113                 return;
 114         }
 115         /* Validate queue number */
 116         if (queue >= priv->rxqs_n) {
 117                 DRV_LOG(ERR, "port %u VLAN stripping, invalid queue number %d",
 118                         dev->data->port_id, queue);
 119                 return;
 120         }
 121         DRV_LOG(DEBUG, "port %u set VLAN offloads 0x%x for port %uqueue %d",
 122                 dev->data->port_id, vlan_offloads, rxq->port_id, queue);
 123         if (!rxq_ctrl->ibv) {
 124                 /* Update related bits in RX queue. */
 125                 rxq->vlan_strip = !!on;
 126                 return;
 127         }
 128         mod = (struct ibv_wq_attr){
 129                 .attr_mask = IBV_WQ_ATTR_FLAGS,
 130                 .flags_mask = IBV_WQ_FLAGS_CVLAN_STRIPPING,
 131                 .flags = vlan_offloads,
 132         };
 133         ret = mlx5_glue->modify_wq(rxq_ctrl->ibv->wq, &mod);
 134         if (ret) {
 135                 DRV_LOG(ERR, "port %u failed to modified stripping mode: %s",
 136                         dev->data->port_id, strerror(rte_errno));
 137                 return;
 138         }
 139         /* Update related bits in RX queue. */
 140         rxq->vlan_strip = !!on;
 141 }
 142
 143 /**
 144  * Callback to set/reset VLAN offloads for a port.
 145  *
 146  * @param dev
 147  *   Pointer to Ethernet device structure.
 148  * @param mask
 149  *   VLAN offload bit mask.
 150  *
 151  * @return
 152  *   0 on success, a negative errno value otherwise and rte_errno is set.
 153  */
 154 int
 155 mlx5_vlan_offload_set(struct rte_eth_dev *dev, int mask)
 156 {
 157         struct priv *priv = dev->data->dev_private;
 158         unsigned int i;
 159
 160         if (mask & ETH_VLAN_STRIP_MASK) {
 161                 int hw_vlan_strip = !!(dev->data->dev_conf.rxmode.offloads &
 162                                        DEV_RX_OFFLOAD_VLAN_STRIP);
 163
 164                 if (!priv->config.hw_vlan_strip) {
 165                         DRV_LOG(ERR, "port %u VLAN stripping is not supported",
 166                                 dev->data->port_id);
 167                         return 0;
 168                 }
 169                 /* Run on every RX queue and set/reset VLAN stripping. */
 170                 for (i = 0; (i != priv->rxqs_n); i++)
 171                         mlx5_vlan_strip_queue_set(dev, i, hw_vlan_strip);
 172         }
 173         return 0;
 174 }