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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright 2015 6WIND S.A.
* Copyright 2015 Mellanox.
*/
#include <stddef.h>
#include <errno.h>
#include <assert.h>
#include <stdint.h>
/* Verbs headers do not support -pedantic. */
#ifdef PEDANTIC
#pragma GCC diagnostic ignored "-Wpedantic"
#endif
#include <infiniband/mlx5dv.h>
#include <infiniband/verbs.h>
#ifdef PEDANTIC
#pragma GCC diagnostic error "-Wpedantic"
#endif
#include <rte_ethdev_driver.h>
#include <rte_common.h>
#include "mlx5_utils.h"
#include "mlx5.h"
#include "mlx5_autoconf.h"
#include "mlx5_glue.h"
/**
* DPDK callback to configure a VLAN filter.
*
* @param dev
* Pointer to Ethernet device structure.
* @param vlan_id
* VLAN ID to filter.
* @param on
* Toggle filter.
*
* @return
* 0 on success, negative errno value on failure.
*/
int
mlx5_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
{
struct priv *priv = dev->data->dev_private;
unsigned int i;
int ret = 0;
priv_lock(priv);
DEBUG("%p: %s VLAN filter ID %" PRIu16,
(void *)dev, (on ? "enable" : "disable"), vlan_id);
assert(priv->vlan_filter_n <= RTE_DIM(priv->vlan_filter));
for (i = 0; (i != priv->vlan_filter_n); ++i)
if (priv->vlan_filter[i] == vlan_id)
break;
/* Check if there's room for another VLAN filter. */
if (i == RTE_DIM(priv->vlan_filter)) {
ret = -ENOMEM;
goto out;
}
if (i < priv->vlan_filter_n) {
assert(priv->vlan_filter_n != 0);
/* Enabling an existing VLAN filter has no effect. */
if (on)
goto out;
/* Remove VLAN filter from list. */
--priv->vlan_filter_n;
memmove(&priv->vlan_filter[i],
&priv->vlan_filter[i + 1],
sizeof(priv->vlan_filter[i]) *
(priv->vlan_filter_n - i));
priv->vlan_filter[priv->vlan_filter_n] = 0;
} else {
assert(i == priv->vlan_filter_n);
/* Disabling an unknown VLAN filter has no effect. */
if (!on)
goto out;
/* Add new VLAN filter. */
priv->vlan_filter[priv->vlan_filter_n] = vlan_id;
++priv->vlan_filter_n;
}
if (dev->data->dev_started)
priv_dev_traffic_restart(priv, dev);
out:
priv_unlock(priv);
return ret;
}
/**
* Set/reset VLAN stripping for a specific queue.
*
* @param priv
* Pointer to private structure.
* @param idx
* RX queue index.
* @param on
* Enable/disable VLAN stripping.
*/
static void
priv_vlan_strip_queue_set(struct priv *priv, uint16_t idx, int on)
{
struct mlx5_rxq_data *rxq = (*priv->rxqs)[idx];
struct mlx5_rxq_ctrl *rxq_ctrl =
container_of(rxq, struct mlx5_rxq_ctrl, rxq);
struct ibv_wq_attr mod;
uint16_t vlan_offloads =
(on ? IBV_WQ_FLAGS_CVLAN_STRIPPING : 0) |
0;
int err;
DEBUG("set VLAN offloads 0x%x for port %d queue %d",
vlan_offloads, rxq->port_id, idx);
if (!rxq_ctrl->ibv) {
/* Update related bits in RX queue. */
rxq->vlan_strip = !!on;
return;
}
mod = (struct ibv_wq_attr){
.attr_mask = IBV_WQ_ATTR_FLAGS,
.flags_mask = IBV_WQ_FLAGS_CVLAN_STRIPPING,
.flags = vlan_offloads,
};
err = mlx5_glue->modify_wq(rxq_ctrl->ibv->wq, &mod);
if (err) {
ERROR("%p: failed to modified stripping mode: %s",
(void *)priv, strerror(err));
return;
}
/* Update related bits in RX queue. */
rxq->vlan_strip = !!on;
}
/**
* Callback to set/reset VLAN stripping for a specific queue.
*
* @param dev
* Pointer to Ethernet device structure.
* @param queue
* RX queue index.
* @param on
* Enable/disable VLAN stripping.
*/
void
mlx5_vlan_strip_queue_set(struct rte_eth_dev *dev, uint16_t queue, int on)
{
struct priv *priv = dev->data->dev_private;
/* Validate hw support */
if (!priv->config.hw_vlan_strip) {
ERROR("VLAN stripping is not supported");
return;
}
/* Validate queue number */
if (queue >= priv->rxqs_n) {
ERROR("VLAN stripping, invalid queue number %d", queue);
return;
}
priv_lock(priv);
priv_vlan_strip_queue_set(priv, queue, on);
priv_unlock(priv);
}
/**
* Callback to set/reset VLAN offloads for a port.
*
* @param dev
* Pointer to Ethernet device structure.
* @param mask
* VLAN offload bit mask.
*/
int
mlx5_vlan_offload_set(struct rte_eth_dev *dev, int mask)
{
struct priv *priv = dev->data->dev_private;
unsigned int i;
if (mask & ETH_VLAN_STRIP_MASK) {
int hw_vlan_strip = !!(dev->data->dev_conf.rxmode.offloads &
DEV_RX_OFFLOAD_VLAN_STRIP);
if (!priv->config.hw_vlan_strip) {
ERROR("VLAN stripping is not supported");
return 0;
}
/* Run on every RX queue and set/reset VLAN stripping. */
priv_lock(priv);
for (i = 0; (i != priv->rxqs_n); i++)
priv_vlan_strip_queue_set(priv, i, hw_vlan_strip);
priv_unlock(priv);
}
return 0;
}
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