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_devx_cmds.h"
  34 #include "mlx5_rxtx.h"
  35 #include "mlx5_utils.h"
  36
  37 /**
  38  * DPDK callback to configure a VLAN filter.
  39  *
  40  * @param dev
  41  *   Pointer to Ethernet device structure.
  42  * @param vlan_id
  43  *   VLAN ID to filter.
  44  * @param on
  45  *   Toggle filter.
  46  *
  47  * @return
  48  *   0 on success, a negative errno value otherwise and rte_errno is set.
  49  */
  50 int
  51 mlx5_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
  52 {
  53         struct mlx5_priv *priv = dev->data->dev_private;
  54         unsigned int i;
  55
  56         DRV_LOG(DEBUG, "port %u %s VLAN filter ID %" PRIu16,
  57                 dev->data->port_id, (on ? "enable" : "disable"), vlan_id);
  58         assert(priv->vlan_filter_n <= RTE_DIM(priv->vlan_filter));
  59         for (i = 0; (i != priv->vlan_filter_n); ++i)
  60                 if (priv->vlan_filter[i] == vlan_id)
  61                         break;
  62         /* Check if there's room for another VLAN filter. */
  63         if (i == RTE_DIM(priv->vlan_filter)) {
  64                 rte_errno = ENOMEM;
  65                 return -rte_errno;
  66         }
  67         if (i < priv->vlan_filter_n) {
  68                 assert(priv->vlan_filter_n != 0);
  69                 /* Enabling an existing VLAN filter has no effect. */
  70                 if (on)
  71                         goto out;
  72                 /* Remove VLAN filter from list. */
  73                 --priv->vlan_filter_n;
  74                 memmove(&priv->vlan_filter[i],
  75                         &priv->vlan_filter[i + 1],
  76                         sizeof(priv->vlan_filter[i]) *
  77                         (priv->vlan_filter_n - i));
  78                 priv->vlan_filter[priv->vlan_filter_n] = 0;
  79         } else {
  80                 assert(i == priv->vlan_filter_n);
  81                 /* Disabling an unknown VLAN filter has no effect. */
  82                 if (!on)
  83                         goto out;
  84                 /* Add new VLAN filter. */
  85                 priv->vlan_filter[priv->vlan_filter_n] = vlan_id;
  86                 ++priv->vlan_filter_n;
  87         }
  88 out:
  89         if (dev->data->dev_started)
  90                 return mlx5_traffic_restart(dev);
  91         return 0;
  92 }
  93
  94 /**
  95  * Callback to set/reset VLAN stripping for a specific queue.
  96  *
  97  * @param dev
  98  *   Pointer to Ethernet device structure.
  99  * @param queue
 100  *   RX queue index.
 101  * @param on
 102  *   Enable/disable VLAN stripping.
 103  */
 104 void
 105 mlx5_vlan_strip_queue_set(struct rte_eth_dev *dev, uint16_t queue, int on)
 106 {
 107         struct mlx5_priv *priv = dev->data->dev_private;
 108         struct mlx5_rxq_data *rxq = (*priv->rxqs)[queue];
 109         struct mlx5_rxq_ctrl *rxq_ctrl =
 110                 container_of(rxq, struct mlx5_rxq_ctrl, rxq);
 111         struct ibv_wq_attr mod;
 112         uint16_t vlan_offloads =
 113                 (on ? IBV_WQ_FLAGS_CVLAN_STRIPPING : 0) |
 114                 0;
 115         int ret = 0;
 116
 117         /* Validate hw support */
 118         if (!priv->config.hw_vlan_strip) {
 119                 DRV_LOG(ERR, "port %u VLAN stripping is not supported",
 120                         dev->data->port_id);
 121                 return;
 122         }
 123         /* Validate queue number */
 124         if (queue >= priv->rxqs_n) {
 125                 DRV_LOG(ERR, "port %u VLAN stripping, invalid queue number %d",
 126                         dev->data->port_id, queue);
 127                 return;
 128         }
 129         DRV_LOG(DEBUG, "port %u set VLAN offloads 0x%x for port %uqueue %d",
 130                 dev->data->port_id, vlan_offloads, rxq->port_id, queue);
 131         if (!rxq_ctrl->obj) {
 132                 /* Update related bits in RX queue. */
 133                 rxq->vlan_strip = !!on;
 134                 return;
 135         }
 136         if (rxq_ctrl->obj->type == MLX5_RXQ_OBJ_TYPE_IBV) {
 137                 mod = (struct ibv_wq_attr){
 138                         .attr_mask = IBV_WQ_ATTR_FLAGS,
 139                         .flags_mask = IBV_WQ_FLAGS_CVLAN_STRIPPING,
 140                         .flags = vlan_offloads,
 141                 };
 142                 ret = mlx5_glue->modify_wq(rxq_ctrl->obj->wq, &mod);
 143         } else if (rxq_ctrl->obj->type == MLX5_RXQ_OBJ_TYPE_DEVX_RQ) {
 144                 struct mlx5_devx_modify_rq_attr rq_attr;
 145
 146                 memset(&rq_attr, 0, sizeof(rq_attr));
 147                 rq_attr.rq_state = MLX5_RQC_STATE_RDY;
 148                 rq_attr.state = MLX5_RQC_STATE_RDY;
 149                 rq_attr.vsd = (on ? 0 : 1);
 150                 rq_attr.modify_bitmask = MLX5_MODIFY_RQ_IN_MODIFY_BITMASK_VSD;
 151                 ret = mlx5_devx_cmd_modify_rq(rxq_ctrl->obj->rq, &rq_attr);
 152         }
 153         if (ret) {
 154                 DRV_LOG(ERR, "port %u failed to modify object %d stripping "
 155                         "mode: %s", dev->data->port_id,
 156                         rxq_ctrl->obj->type, strerror(rte_errno));
 157                 return;
 158         }
 159         /* Update related bits in RX queue. */
 160         rxq->vlan_strip = !!on;
 161 }
 162
 163 /**
 164  * Callback to set/reset VLAN offloads for a port.
 165  *
 166  * @param dev
 167  *   Pointer to Ethernet device structure.
 168  * @param mask
 169  *   VLAN offload bit mask.
 170  *
 171  * @return
 172  *   0 on success, a negative errno value otherwise and rte_errno is set.
 173  */
 174 int
 175 mlx5_vlan_offload_set(struct rte_eth_dev *dev, int mask)
 176 {
 177         struct mlx5_priv *priv = dev->data->dev_private;
 178         unsigned int i;
 179
 180         if (mask & ETH_VLAN_STRIP_MASK) {
 181                 int hw_vlan_strip = !!(dev->data->dev_conf.rxmode.offloads &
 182                                        DEV_RX_OFFLOAD_VLAN_STRIP);
 183
 184                 if (!priv->config.hw_vlan_strip) {
 185                         DRV_LOG(ERR, "port %u VLAN stripping is not supported",
 186                                 dev->data->port_id);
 187                         return 0;
 188                 }
 189                 /* Run on every RX queue and set/reset VLAN stripping. */
 190                 for (i = 0; (i != priv->rxqs_n); i++)
 191                         mlx5_vlan_strip_queue_set(dev, i, hw_vlan_strip);
 192         }
 193         return 0;
 194 }