LXR dpdk/drivers/net/mlx5/linux/mlx5_vlan

   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/*
  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#include <ethdev_driver.h>
  18#include <rte_common.h>
  19#include <rte_malloc.h>
  20#include <rte_hypervisor.h>
  21
  22#include <mlx5.h>
  23#include <mlx5_nl.h>
  24#include <mlx5_malloc.h>
  25
  26/*
  27 * Release VLAN network device, created for VM workaround.
  28 *
  29 * @param[in] dev
  30 *   Ethernet device object, Netlink context provider.
  31 * @param[in] vlan
  32 *   Object representing the network device to release.
  33 */
  34void
  35mlx5_vlan_vmwa_release(struct rte_eth_dev *dev,
  36                            struct mlx5_vf_vlan *vlan)
  37{
  38        struct mlx5_priv *priv = dev->data->dev_private;
  39        struct mlx5_nl_vlan_vmwa_context *vmwa = priv->vmwa_context;
  40        struct mlx5_nl_vlan_dev *vlan_dev = &vmwa->vlan_dev[0];
  41
  42        MLX5_ASSERT(vlan->created);
  43        MLX5_ASSERT(priv->vmwa_context);
  44        if (!vlan->created || !vmwa)
  45                return;
  46        vlan->created = 0;
  47        rte_spinlock_lock(&vmwa->sl);
  48        MLX5_ASSERT(vlan_dev[vlan->tag].refcnt);
  49        if (--vlan_dev[vlan->tag].refcnt == 0 &&
  50            vlan_dev[vlan->tag].ifindex) {
  51                mlx5_nl_vlan_vmwa_delete(vmwa, vlan_dev[vlan->tag].ifindex);
  52                vlan_dev[vlan->tag].ifindex = 0;
  53        }
  54        rte_spinlock_unlock(&vmwa->sl);
  55}
  56
  57/**
  58 * Acquire VLAN interface with specified tag for VM workaround.
  59 *
  60 * @param[in] dev
  61 *   Ethernet device object, Netlink context provider.
  62 * @param[in] vlan
  63 *   Object representing the network device to acquire.
  64 */
  65void
  66mlx5_vlan_vmwa_acquire(struct rte_eth_dev *dev,
  67                            struct mlx5_vf_vlan *vlan)
  68{
  69        struct mlx5_priv *priv = dev->data->dev_private;
  70        struct mlx5_nl_vlan_vmwa_context *vmwa = priv->vmwa_context;
  71        struct mlx5_nl_vlan_dev *vlan_dev = &vmwa->vlan_dev[0];
  72
  73        MLX5_ASSERT(!vlan->created);
  74        MLX5_ASSERT(priv->vmwa_context);
  75        if (vlan->created || !vmwa)
  76                return;
  77        rte_spinlock_lock(&vmwa->sl);
  78        if (vlan_dev[vlan->tag].refcnt == 0) {
  79                MLX5_ASSERT(!vlan_dev[vlan->tag].ifindex);
  80                vlan_dev[vlan->tag].ifindex =
  81                        mlx5_nl_vlan_vmwa_create(vmwa, vmwa->vf_ifindex,
  82                                                 vlan->tag);
  83        }
  84        if (vlan_dev[vlan->tag].ifindex) {
  85                vlan_dev[vlan->tag].refcnt++;
  86                vlan->created = 1;
  87        }
  88        rte_spinlock_unlock(&vmwa->sl);
  89}
  90
  91/*
  92 * Create per ethernet device VLAN VM workaround context
  93 *
  94 * @param dev
  95 *   Pointer to Ethernet device structure.
  96 * @param ifindex
  97 *   Interface index.
  98 *
  99 * @Return
 100 *   Pointer to mlx5_nl_vlan_vmwa_context
 101 */
 102void *
 103mlx5_vlan_vmwa_init(struct rte_eth_dev *dev, uint32_t ifindex)
 104{
 105        struct mlx5_priv *priv = dev->data->dev_private;
 106        struct mlx5_dev_config *config = &priv->config;
 107        struct mlx5_nl_vlan_vmwa_context *vmwa;
 108        enum rte_hypervisor hv_type;
 109
 110        /* Do not engage workaround over PF. */
 111        if (!config->vf)
 112                return NULL;
 113        /* Check whether there is desired virtual environment */
 114        hv_type = rte_hypervisor_get();
 115        switch (hv_type) {
 116        case RTE_HYPERVISOR_UNKNOWN:
 117        case RTE_HYPERVISOR_VMWARE:
 118                /*
 119                 * The "white list" of configurations
 120                 * to engage the workaround.
 121                 */
 122                break;
 123        default:
 124                /*
 125                 * The configuration is not found in the "white list".
 126                 * We should not engage the VLAN workaround.
 127                 */
 128                return NULL;
 129        }
 130        vmwa = mlx5_malloc(MLX5_MEM_ZERO, sizeof(*vmwa), sizeof(uint32_t),
 131                           SOCKET_ID_ANY);
 132        if (!vmwa) {
 133                DRV_LOG(WARNING,
 134                        "Can not allocate memory"
 135                        " for VLAN workaround context");
 136                return NULL;
 137        }
 138        rte_spinlock_init(&vmwa->sl);
 139        vmwa->nl_socket = mlx5_nl_init(NETLINK_ROUTE);
 140        if (vmwa->nl_socket < 0) {
 141                DRV_LOG(WARNING,
 142                        "Can not create Netlink socket"
 143                        " for VLAN workaround context");
 144                mlx5_free(vmwa);
 145                return NULL;
 146        }
 147        vmwa->vf_ifindex = ifindex;
 148        /* Cleanup for existing VLAN devices. */
 149        return vmwa;
 150}
 151
 152/*
 153 * Destroy per ethernet device VLAN VM workaround context
 154 *
 155 * @param dev
 156 *   Pointer to VM context
 157 */
 158void
 159mlx5_vlan_vmwa_exit(void *vmctx)
 160{
 161        unsigned int i;
 162
 163        struct mlx5_nl_vlan_vmwa_context *vmwa = vmctx;
 164        /* Delete all remaining VLAN devices. */
 165        for (i = 0; i < RTE_DIM(vmwa->vlan_dev); i++) {
 166                if (vmwa->vlan_dev[i].ifindex)
 167                        mlx5_nl_vlan_vmwa_delete(vmwa,
 168                                                 vmwa->vlan_dev[i].ifindex);
 169        }
 170        if (vmwa->nl_socket >= 0)
 171                close(vmwa->nl_socket);
 172        mlx5_free(vmwa);
 173}
 174