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 <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_rx.h"
  20 #include "mlx5_utils.h"
  21 #include "mlx5_devx.h"
  22
  23 /**
  24  * DPDK callback to configure a VLAN filter.
  25  *
  26  * @param dev
  27  *   Pointer to Ethernet device structure.
  28  * @param vlan_id
  29  *   VLAN ID to filter.
  30  * @param on
  31  *   Toggle filter.
  32  *
  33  * @return
  34  *   0 on success, a negative errno value otherwise and rte_errno is set.
  35  */
  36 int
  37 mlx5_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
  38 {
  39         struct mlx5_priv *priv = dev->data->dev_private;
  40         unsigned int i;
  41
  42         DRV_LOG(DEBUG, "port %u %s VLAN filter ID %" PRIu16,
  43                 dev->data->port_id, (on ? "enable" : "disable"), vlan_id);
  44         MLX5_ASSERT(priv->vlan_filter_n <= RTE_DIM(priv->vlan_filter));
  45         for (i = 0; (i != priv->vlan_filter_n); ++i)
  46                 if (priv->vlan_filter[i] == vlan_id)
  47                         break;
  48         /* Check if there's room for another VLAN filter. */
  49         if (i == RTE_DIM(priv->vlan_filter)) {
  50                 rte_errno = ENOMEM;
  51                 return -rte_errno;
  52         }
  53         if (i < priv->vlan_filter_n) {
  54                 MLX5_ASSERT(priv->vlan_filter_n != 0);
  55                 /* Enabling an existing VLAN filter has no effect. */
  56                 if (on)
  57                         goto out;
  58                 /* Remove VLAN filter from list. */
  59                 --priv->vlan_filter_n;
  60                 memmove(&priv->vlan_filter[i],
  61                         &priv->vlan_filter[i + 1],
  62                         sizeof(priv->vlan_filter[i]) *
  63                         (priv->vlan_filter_n - i));
  64                 priv->vlan_filter[priv->vlan_filter_n] = 0;
  65         } else {
  66                 MLX5_ASSERT(i == priv->vlan_filter_n);
  67                 /* Disabling an unknown VLAN filter has no effect. */
  68                 if (!on)
  69                         goto out;
  70                 /* Add new VLAN filter. */
  71                 priv->vlan_filter[priv->vlan_filter_n] = vlan_id;
  72                 ++priv->vlan_filter_n;
  73         }
  74 out:
  75         if (dev->data->dev_started)
  76                 return mlx5_traffic_restart(dev);
  77         return 0;
  78 }
  79
  80 /**
  81  * Callback to set/reset VLAN stripping for a specific queue.
  82  *
  83  * @param dev
  84  *   Pointer to Ethernet device structure.
  85  * @param queue
  86  *   RX queue index.
  87  * @param on
  88  *   Enable/disable VLAN stripping.
  89  */
  90 void
  91 mlx5_vlan_strip_queue_set(struct rte_eth_dev *dev, uint16_t queue, int on)
  92 {
  93         struct mlx5_priv *priv = dev->data->dev_private;
  94         struct mlx5_rxq_data *rxq = (*priv->rxqs)[queue];
  95         struct mlx5_rxq_ctrl *rxq_ctrl =
  96                 container_of(rxq, struct mlx5_rxq_ctrl, rxq);
  97         int ret = 0;
  98
  99         /* Validate hw support */
 100         if (!priv->config.hw_vlan_strip) {
 101                 DRV_LOG(ERR, "port %u VLAN stripping is not supported",
 102                         dev->data->port_id);
 103                 return;
 104         }
 105         /* Validate queue number */
 106         if (queue >= priv->rxqs_n) {
 107                 DRV_LOG(ERR, "port %u VLAN stripping, invalid queue number %d",
 108                         dev->data->port_id, queue);
 109                 return;
 110         }
 111         DRV_LOG(DEBUG, "port %u set VLAN stripping offloads %d for port %uqueue %d",
 112                 dev->data->port_id, on, rxq->port_id, queue);
 113         if (!rxq_ctrl->obj) {
 114                 /* Update related bits in RX queue. */
 115                 rxq->vlan_strip = !!on;
 116                 return;
 117         }
 118         ret = priv->obj_ops.rxq_obj_modify_vlan_strip(rxq_ctrl->obj, on);
 119         if (ret) {
 120                 DRV_LOG(ERR, "Port %u failed to modify object stripping mode:"
 121                         " %s", dev->data->port_id, 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 }