drivers/net/mlx5/mlx5_vlan.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright 2015 6WIND S.A.
   3  * Copyright 2015 Mellanox Technologies, Ltd
   4  */
   5
   6 #include <stddef.h>
   7 #include <errno.h>
   8 #include <stdint.h>
   9 #include <unistd.h>
  10
  11 #include <rte_ethdev_driver.h>
  12 #include <rte_common.h>
  13 #include <rte_malloc.h>
  14 #include <rte_hypervisor.h>
  15
  16 #include "mlx5.h"
  17 #include "mlx5_autoconf.h"
  18 #include "mlx5_rxtx.h"
  19 #include "mlx5_utils.h"
  20 #include "mlx5_devx.h"
  21
  22 /**
  23  * DPDK callback to configure a VLAN filter.
  24  *
  25  * @param dev
  26  *   Pointer to Ethernet device structure.
  27  * @param vlan_id
  28  *   VLAN ID to filter.
  29  * @param on
  30  *   Toggle filter.
  31  *
  32  * @return
  33  *   0 on success, a negative errno value otherwise and rte_errno is set.
  34  */
  35 int
  36 mlx5_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
  37 {
  38         struct mlx5_priv *priv = dev->data->dev_private;
  39         unsigned int i;
  40
  41         DRV_LOG(DEBUG, "port %u %s VLAN filter ID %" PRIu16,
  42                 dev->data->port_id, (on ? "enable" : "disable"), vlan_id);
  43         MLX5_ASSERT(priv->vlan_filter_n <= RTE_DIM(priv->vlan_filter));
  44         for (i = 0; (i != priv->vlan_filter_n); ++i)
  45                 if (priv->vlan_filter[i] == vlan_id)
  46                         break;
  47         /* Check if there's room for another VLAN filter. */
  48         if (i == RTE_DIM(priv->vlan_filter)) {
  49                 rte_errno = ENOMEM;
  50                 return -rte_errno;
  51         }
  52         if (i < priv->vlan_filter_n) {
  53                 MLX5_ASSERT(priv->vlan_filter_n != 0);
  54                 /* Enabling an existing VLAN filter has no effect. */
  55                 if (on)
  56                         goto out;
  57                 /* Remove VLAN filter from list. */
  58                 --priv->vlan_filter_n;
  59                 memmove(&priv->vlan_filter[i],
  60                         &priv->vlan_filter[i + 1],
  61                         sizeof(priv->vlan_filter[i]) *
  62                         (priv->vlan_filter_n - i));
  63                 priv->vlan_filter[priv->vlan_filter_n] = 0;
  64         } else {
  65                 MLX5_ASSERT(i == priv->vlan_filter_n);
  66                 /* Disabling an unknown VLAN filter has no effect. */
  67                 if (!on)
  68                         goto out;
  69                 /* Add new VLAN filter. */
  70                 priv->vlan_filter[priv->vlan_filter_n] = vlan_id;
  71                 ++priv->vlan_filter_n;
  72         }
  73 out:
  74         if (dev->data->dev_started)
  75                 return mlx5_traffic_restart(dev);
  76         return 0;
  77 }
  78
  79 /**
  80  * Callback to set/reset VLAN stripping for a specific queue.
  81  *
  82  * @param dev
  83  *   Pointer to Ethernet device structure.
  84  * @param queue
  85  *   RX queue index.
  86  * @param on
  87  *   Enable/disable VLAN stripping.
  88  */
  89 void
  90 mlx5_vlan_strip_queue_set(struct rte_eth_dev *dev, uint16_t queue, int on)
  91 {
  92         struct mlx5_priv *priv = dev->data->dev_private;
  93         struct mlx5_rxq_data *rxq = (*priv->rxqs)[queue];
  94         struct mlx5_rxq_ctrl *rxq_ctrl =
  95                 container_of(rxq, struct mlx5_rxq_ctrl, rxq);
  96         int ret = 0;
  97
  98         /* Validate hw support */
  99         if (!priv->config.hw_vlan_strip) {
 100                 DRV_LOG(ERR, "port %u VLAN stripping is not supported",
 101                         dev->data->port_id);
 102                 return;
 103         }
 104         /* Validate queue number */
 105         if (queue >= priv->rxqs_n) {
 106                 DRV_LOG(ERR, "port %u VLAN stripping, invalid queue number %d",
 107                         dev->data->port_id, queue);
 108                 return;
 109         }
 110         DRV_LOG(DEBUG, "port %u set VLAN stripping offloads %d for port %uqueue %d",
 111                 dev->data->port_id, on, rxq->port_id, queue);
 112         if (!rxq_ctrl->obj) {
 113                 /* Update related bits in RX queue. */
 114                 rxq->vlan_strip = !!on;
 115                 return;
 116         }
 117         ret = priv->obj_ops->rxq_obj_modify_vlan_strip(rxq_ctrl->obj, on);
 118         if (ret) {
 119                 DRV_LOG(ERR, "port %u failed to modify object %d stripping "
 120                         "mode: %s", dev->data->port_id,
 121                         rxq_ctrl->obj->type, strerror(rte_errno));
 122                 return;
 123         }
 124         /* Update related bits in RX queue. */
 125         rxq->vlan_strip = !!on;
 126 }
 127
 128 /**
 129  * Callback to set/reset VLAN offloads for a port.
 130  *
 131  * @param dev
 132  *   Pointer to Ethernet device structure.
 133  * @param mask
 134  *   VLAN offload bit mask.
 135  *
 136  * @return
 137  *   0 on success, a negative errno value otherwise and rte_errno is set.
 138  */
 139 int
 140 mlx5_vlan_offload_set(struct rte_eth_dev *dev, int mask)
 141 {
 142         struct mlx5_priv *priv = dev->data->dev_private;
 143         unsigned int i;
 144
 145         if (mask & ETH_VLAN_STRIP_MASK) {
 146                 int hw_vlan_strip = !!(dev->data->dev_conf.rxmode.offloads &
 147                                        DEV_RX_OFFLOAD_VLAN_STRIP);
 148
 149                 if (!priv->config.hw_vlan_strip) {
 150                         DRV_LOG(ERR, "port %u VLAN stripping is not supported",
 151                                 dev->data->port_id);
 152                         return 0;
 153                 }
 154                 /* Run on every RX queue and set/reset VLAN stripping. */
 155                 for (i = 0; (i != priv->rxqs_n); i++)
 156                         mlx5_vlan_strip_queue_set(dev, i, hw_vlan_strip);
 157         }
 158         return 0;
 159 }