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_glue.h>
  31 #include <mlx5_devx_cmds.h>
  32
  33 #include "mlx5.h"
  34 #include "mlx5_autoconf.h"
  35 #include "mlx5_rxtx.h"
  36 #include "mlx5_utils.h"
  37
  38 /**
  39  * DPDK callback to configure a VLAN filter.
  40  *
  41  * @param dev
  42  *   Pointer to Ethernet device structure.
  43  * @param vlan_id
  44  *   VLAN ID to filter.
  45  * @param on
  46  *   Toggle filter.
  47  *
  48  * @return
  49  *   0 on success, a negative errno value otherwise and rte_errno is set.
  50  */
  51 int
  52 mlx5_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
  53 {
  54         struct mlx5_priv *priv = dev->data->dev_private;
  55         unsigned int i;
  56
  57         DRV_LOG(DEBUG, "port %u %s VLAN filter ID %" PRIu16,
  58                 dev->data->port_id, (on ? "enable" : "disable"), vlan_id);
  59         assert(priv->vlan_filter_n <= RTE_DIM(priv->vlan_filter));
  60         for (i = 0; (i != priv->vlan_filter_n); ++i)
  61                 if (priv->vlan_filter[i] == vlan_id)
  62                         break;
  63         /* Check if there's room for another VLAN filter. */
  64         if (i == RTE_DIM(priv->vlan_filter)) {
  65                 rte_errno = ENOMEM;
  66                 return -rte_errno;
  67         }
  68         if (i < priv->vlan_filter_n) {
  69                 assert(priv->vlan_filter_n != 0);
  70                 /* Enabling an existing VLAN filter has no effect. */
  71                 if (on)
  72                         goto out;
  73                 /* Remove VLAN filter from list. */
  74                 --priv->vlan_filter_n;
  75                 memmove(&priv->vlan_filter[i],
  76                         &priv->vlan_filter[i + 1],
  77                         sizeof(priv->vlan_filter[i]) *
  78                         (priv->vlan_filter_n - i));
  79                 priv->vlan_filter[priv->vlan_filter_n] = 0;
  80         } else {
  81                 assert(i == priv->vlan_filter_n);
  82                 /* Disabling an unknown VLAN filter has no effect. */
  83                 if (!on)
  84                         goto out;
  85                 /* Add new VLAN filter. */
  86                 priv->vlan_filter[priv->vlan_filter_n] = vlan_id;
  87                 ++priv->vlan_filter_n;
  88         }
  89 out:
  90         if (dev->data->dev_started)
  91                 return mlx5_traffic_restart(dev);
  92         return 0;
  93 }
  94
  95 /**
  96  * Callback to set/reset VLAN stripping for a specific queue.
  97  *
  98  * @param dev
  99  *   Pointer to Ethernet device structure.
 100  * @param queue
 101  *   RX queue index.
 102  * @param on
 103  *   Enable/disable VLAN stripping.
 104  */
 105 void
 106 mlx5_vlan_strip_queue_set(struct rte_eth_dev *dev, uint16_t queue, int on)
 107 {
 108         struct mlx5_priv *priv = dev->data->dev_private;
 109         struct mlx5_rxq_data *rxq = (*priv->rxqs)[queue];
 110         struct mlx5_rxq_ctrl *rxq_ctrl =
 111                 container_of(rxq, struct mlx5_rxq_ctrl, rxq);
 112         struct ibv_wq_attr mod;
 113         uint16_t vlan_offloads =
 114                 (on ? IBV_WQ_FLAGS_CVLAN_STRIPPING : 0) |
 115                 0;
 116         int ret = 0;
 117
 118         /* Validate hw support */
 119         if (!priv->config.hw_vlan_strip) {
 120                 DRV_LOG(ERR, "port %u VLAN stripping is not supported",
 121                         dev->data->port_id);
 122                 return;
 123         }
 124         /* Validate queue number */
 125         if (queue >= priv->rxqs_n) {
 126                 DRV_LOG(ERR, "port %u VLAN stripping, invalid queue number %d",
 127                         dev->data->port_id, queue);
 128                 return;
 129         }
 130         DRV_LOG(DEBUG, "port %u set VLAN offloads 0x%x for port %uqueue %d",
 131                 dev->data->port_id, vlan_offloads, rxq->port_id, queue);
 132         if (!rxq_ctrl->obj) {
 133                 /* Update related bits in RX queue. */
 134                 rxq->vlan_strip = !!on;
 135                 return;
 136         }
 137         if (rxq_ctrl->obj->type == MLX5_RXQ_OBJ_TYPE_IBV) {
 138                 mod = (struct ibv_wq_attr){
 139                         .attr_mask = IBV_WQ_ATTR_FLAGS,
 140                         .flags_mask = IBV_WQ_FLAGS_CVLAN_STRIPPING,
 141                         .flags = vlan_offloads,
 142                 };
 143                 ret = mlx5_glue->modify_wq(rxq_ctrl->obj->wq, &mod);
 144         } else if (rxq_ctrl->obj->type == MLX5_RXQ_OBJ_TYPE_DEVX_RQ) {
 145                 struct mlx5_devx_modify_rq_attr rq_attr;
 146
 147                 memset(&rq_attr, 0, sizeof(rq_attr));
 148                 rq_attr.rq_state = MLX5_RQC_STATE_RDY;
 149                 rq_attr.state = MLX5_RQC_STATE_RDY;
 150                 rq_attr.vsd = (on ? 0 : 1);
 151                 rq_attr.modify_bitmask = MLX5_MODIFY_RQ_IN_MODIFY_BITMASK_VSD;
 152                 ret = mlx5_devx_cmd_modify_rq(rxq_ctrl->obj->rq, &rq_attr);
 153         }
 154         if (ret) {
 155                 DRV_LOG(ERR, "port %u failed to modify object %d stripping "
 156                         "mode: %s", dev->data->port_id,
 157                         rxq_ctrl->obj->type, strerror(rte_errno));
 158                 return;
 159         }
 160         /* Update related bits in RX queue. */
 161         rxq->vlan_strip = !!on;
 162 }
 163
 164 /**
 165  * Callback to set/reset VLAN offloads for a port.
 166  *
 167  * @param dev
 168  *   Pointer to Ethernet device structure.
 169  * @param mask
 170  *   VLAN offload bit mask.
 171  *
 172  * @return
 173  *   0 on success, a negative errno value otherwise and rte_errno is set.
 174  */
 175 int
 176 mlx5_vlan_offload_set(struct rte_eth_dev *dev, int mask)
 177 {
 178         struct mlx5_priv *priv = dev->data->dev_private;
 179         unsigned int i;
 180
 181         if (mask & ETH_VLAN_STRIP_MASK) {
 182                 int hw_vlan_strip = !!(dev->data->dev_conf.rxmode.offloads &
 183                                        DEV_RX_OFFLOAD_VLAN_STRIP);
 184
 185                 if (!priv->config.hw_vlan_strip) {
 186                         DRV_LOG(ERR, "port %u VLAN stripping is not supported",
 187                                 dev->data->port_id);
 188                         return 0;
 189                 }
 190                 /* Run on every RX queue and set/reset VLAN stripping. */
 191                 for (i = 0; (i != priv->rxqs_n); i++)
 192                         mlx5_vlan_strip_queue_set(dev, i, hw_vlan_strip);
 193         }
 194         return 0;
 195 }