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