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 <assert.h>
   9 #include <stdint.h>
  10
  11 /*
  12  * Not needed by this file; included to work around the lack of off_t
  13  * definition for mlx5dv.h with unpatched rdma-core versions.
  14  */
  15 #include <sys/types.h>
  16
  17 /* Verbs headers do not support -pedantic. */
  18 #ifdef PEDANTIC
  19 #pragma GCC diagnostic ignored "-Wpedantic"
  20 #endif
  21 #include <infiniband/mlx5dv.h>
  22 #include <infiniband/verbs.h>
  23 #ifdef PEDANTIC
  24 #pragma GCC diagnostic error "-Wpedantic"
  25 #endif
  26
  27 #include <rte_ethdev_driver.h>
  28 #include <rte_common.h>
  29
  30 #include "mlx5.h"
  31 #include "mlx5_autoconf.h"
  32 #include "mlx5_glue.h"
  33 #include "mlx5_rxtx.h"
  34 #include "mlx5_utils.h"
  35
  36 /**
  37  * DPDK callback to configure a VLAN filter.
  38  *
  39  * @param dev
  40  *   Pointer to Ethernet device structure.
  41  * @param vlan_id
  42  *   VLAN ID to filter.
  43  * @param on
  44  *   Toggle filter.
  45  *
  46  * @return
  47  *   0 on success, a negative errno value otherwise and rte_errno is set.
  48  */
  49 int
  50 mlx5_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
  51 {
  52         struct mlx5_priv *priv = dev->data->dev_private;
  53         unsigned int i;
  54
  55         DRV_LOG(DEBUG, "port %u %s VLAN filter ID %" PRIu16,
  56                 dev->data->port_id, (on ? "enable" : "disable"), vlan_id);
  57         assert(priv->vlan_filter_n <= RTE_DIM(priv->vlan_filter));
  58         for (i = 0; (i != priv->vlan_filter_n); ++i)
  59                 if (priv->vlan_filter[i] == vlan_id)
  60                         break;
  61         /* Check if there's room for another VLAN filter. */
  62         if (i == RTE_DIM(priv->vlan_filter)) {
  63                 rte_errno = ENOMEM;
  64                 return -rte_errno;
  65         }
  66         if (i < priv->vlan_filter_n) {
  67                 assert(priv->vlan_filter_n != 0);
  68                 /* Enabling an existing VLAN filter has no effect. */
  69                 if (on)
  70                         goto out;
  71                 /* Remove VLAN filter from list. */
  72                 --priv->vlan_filter_n;
  73                 memmove(&priv->vlan_filter[i],
  74                         &priv->vlan_filter[i + 1],
  75                         sizeof(priv->vlan_filter[i]) *
  76                         (priv->vlan_filter_n - i));
  77                 priv->vlan_filter[priv->vlan_filter_n] = 0;
  78         } else {
  79                 assert(i == priv->vlan_filter_n);
  80                 /* Disabling an unknown VLAN filter has no effect. */
  81                 if (!on)
  82                         goto out;
  83                 /* Add new VLAN filter. */
  84                 priv->vlan_filter[priv->vlan_filter_n] = vlan_id;
  85                 ++priv->vlan_filter_n;
  86         }
  87 out:
  88         if (dev->data->dev_started)
  89                 return mlx5_traffic_restart(dev);
  90         return 0;
  91 }
  92
  93 /**
  94  * Callback to set/reset VLAN stripping for a specific queue.
  95  *
  96  * @param dev
  97  *   Pointer to Ethernet device structure.
  98  * @param queue
  99  *   RX queue index.
 100  * @param on
 101  *   Enable/disable VLAN stripping.
 102  */
 103 void
 104 mlx5_vlan_strip_queue_set(struct rte_eth_dev *dev, uint16_t queue, int on)
 105 {
 106         struct mlx5_priv *priv = dev->data->dev_private;
 107         struct mlx5_rxq_data *rxq = (*priv->rxqs)[queue];
 108         struct mlx5_rxq_ctrl *rxq_ctrl =
 109                 container_of(rxq, struct mlx5_rxq_ctrl, rxq);
 110         struct ibv_wq_attr mod;
 111         uint16_t vlan_offloads =
 112                 (on ? IBV_WQ_FLAGS_CVLAN_STRIPPING : 0) |
 113                 0;
 114         int ret;
 115
 116         /* Validate hw support */
 117         if (!priv->config.hw_vlan_strip) {
 118                 DRV_LOG(ERR, "port %u VLAN stripping is not supported",
 119                         dev->data->port_id);
 120                 return;
 121         }
 122         /* Validate queue number */
 123         if (queue >= priv->rxqs_n) {
 124                 DRV_LOG(ERR, "port %u VLAN stripping, invalid queue number %d",
 125                         dev->data->port_id, queue);
 126                 return;
 127         }
 128         DRV_LOG(DEBUG, "port %u set VLAN offloads 0x%x for port %uqueue %d",
 129                 dev->data->port_id, vlan_offloads, rxq->port_id, queue);
 130         if (!rxq_ctrl->ibv) {
 131                 /* Update related bits in RX queue. */
 132                 rxq->vlan_strip = !!on;
 133                 return;
 134         }
 135         mod = (struct ibv_wq_attr){
 136                 .attr_mask = IBV_WQ_ATTR_FLAGS,
 137                 .flags_mask = IBV_WQ_FLAGS_CVLAN_STRIPPING,
 138                 .flags = vlan_offloads,
 139         };
 140         ret = mlx5_glue->modify_wq(rxq_ctrl->ibv->wq, &mod);
 141         if (ret) {
 142                 DRV_LOG(ERR, "port %u failed to modified stripping mode: %s",
 143                         dev->data->port_id, strerror(rte_errno));
 144                 return;
 145         }
 146         /* Update related bits in RX queue. */
 147         rxq->vlan_strip = !!on;
 148 }
 149
 150 /**
 151  * Callback to set/reset VLAN offloads for a port.
 152  *
 153  * @param dev
 154  *   Pointer to Ethernet device structure.
 155  * @param mask
 156  *   VLAN offload bit mask.
 157  *
 158  * @return
 159  *   0 on success, a negative errno value otherwise and rte_errno is set.
 160  */
 161 int
 162 mlx5_vlan_offload_set(struct rte_eth_dev *dev, int mask)
 163 {
 164         struct mlx5_priv *priv = dev->data->dev_private;
 165         unsigned int i;
 166
 167         if (mask & ETH_VLAN_STRIP_MASK) {
 168                 int hw_vlan_strip = !!(dev->data->dev_conf.rxmode.offloads &
 169                                        DEV_RX_OFFLOAD_VLAN_STRIP);
 170
 171                 if (!priv->config.hw_vlan_strip) {
 172                         DRV_LOG(ERR, "port %u VLAN stripping is not supported",
 173                                 dev->data->port_id);
 174                         return 0;
 175                 }
 176                 /* Run on every RX queue and set/reset VLAN stripping. */
 177                 for (i = 0; (i != priv->rxqs_n); i++)
 178                         mlx5_vlan_strip_queue_set(dev, i, hw_vlan_strip);
 179         }
 180         return 0;
 181 }