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/*-
* BSD LICENSE
*
* Copyright 2015 6WIND S.A.
* Copyright 2015 Mellanox.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of 6WIND S.A. nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <stddef.h>
#include <errno.h>
#include <assert.h>
#include <stdint.h>
/* DPDK headers don't like -pedantic. */
#ifdef PEDANTIC
#pragma GCC diagnostic ignored "-pedantic"
#endif
#include <rte_ethdev.h>
#include <rte_common.h>
#ifdef PEDANTIC
#pragma GCC diagnostic error "-pedantic"
#endif
#include "mlx5_utils.h"
#include "mlx5.h"
#include "mlx5_autoconf.h"
/**
* 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, errno value on failure.
*/
static int
vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
{
struct priv *priv = dev->data->dev_private;
unsigned int i;
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))
return ENOMEM;
if (i < priv->vlan_filter_n) {
assert(priv->vlan_filter_n != 0);
/* Enabling an existing VLAN filter has no effect. */
if (on)
return 0;
/* Remove VLAN filter from list. */
--priv->vlan_filter_n;
memmove(&priv->vlan_filter[i],
&priv->vlan_filter[i + 1],
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)
return 0;
/* Add new VLAN filter. */
priv->vlan_filter[priv->vlan_filter_n] = vlan_id;
++priv->vlan_filter_n;
}
/* Rehash flows in all hash RX queues. */
priv_mac_addrs_disable(priv);
priv_special_flow_disable_all(priv);
return priv_rehash_flows(priv);
}
/**
* 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;
int ret;
priv_lock(priv);
ret = vlan_filter_set(dev, vlan_id, on);
priv_unlock(priv);
assert(ret >= 0);
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 rxq *rxq = (*priv->rxqs)[idx];
struct rxq_ctrl *rxq_ctrl = container_of(rxq, struct rxq_ctrl, rxq);
struct ibv_exp_wq_attr mod;
uint16_t vlan_offloads =
(on ? IBV_EXP_RECEIVE_WQ_CVLAN_STRIP : 0) |
0;
int err;
DEBUG("set VLAN offloads 0x%x for port %d queue %d",
vlan_offloads, rxq->port_id, idx);
mod = (struct ibv_exp_wq_attr){
.attr_mask = IBV_EXP_WQ_ATTR_VLAN_OFFLOADS,
.vlan_offloads = vlan_offloads,
};
err = ibv_exp_modify_wq(rxq_ctrl->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->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.
*/
void
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.hw_vlan_strip;
if (!priv->hw_vlan_strip) {
ERROR("VLAN stripping is not supported");
return;
}
/* 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);
}
}
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