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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright 2015 6WIND S.A.
* Copyright 2015 Mellanox Technologies, Ltd
*/
#include <stddef.h>
#include <stdint.h>
#include <errno.h>
#include <string.h>
#include <assert.h>
/* Verbs header. */
/* ISO C doesn't support unnamed structs/unions, disabling -pedantic. */
#ifdef PEDANTIC
#pragma GCC diagnostic ignored "-Wpedantic"
#endif
#include <infiniband/verbs.h>
#ifdef PEDANTIC
#pragma GCC diagnostic error "-Wpedantic"
#endif
#include <rte_malloc.h>
#include <rte_ethdev_driver.h>
#include "mlx5.h"
#include "mlx5_defs.h"
#include "mlx5_rxtx.h"
/**
* DPDK callback to update the RSS hash configuration.
*
* @param dev
* Pointer to Ethernet device structure.
* @param[in] rss_conf
* RSS configuration data.
*
* @return
* 0 on success, a negative errno value otherwise and rte_errno is set.
*/
int
mlx5_rss_hash_update(struct rte_eth_dev *dev,
struct rte_eth_rss_conf *rss_conf)
{
struct mlx5_priv *priv = dev->data->dev_private;
unsigned int i;
unsigned int idx;
if (rss_conf->rss_hf & MLX5_RSS_HF_MASK) {
rte_errno = EINVAL;
return -rte_errno;
}
if (rss_conf->rss_key && rss_conf->rss_key_len) {
if (rss_conf->rss_key_len != MLX5_RSS_HASH_KEY_LEN) {
DRV_LOG(ERR,
"port %u RSS key len must be %s Bytes long",
dev->data->port_id,
RTE_STR(MLX5_RSS_HASH_KEY_LEN));
rte_errno = EINVAL;
return -rte_errno;
}
priv->rss_conf.rss_key = rte_realloc(priv->rss_conf.rss_key,
rss_conf->rss_key_len, 0);
if (!priv->rss_conf.rss_key) {
rte_errno = ENOMEM;
return -rte_errno;
}
memcpy(priv->rss_conf.rss_key, rss_conf->rss_key,
rss_conf->rss_key_len);
priv->rss_conf.rss_key_len = rss_conf->rss_key_len;
}
priv->rss_conf.rss_hf = rss_conf->rss_hf;
/* Enable the RSS hash in all Rx queues. */
for (i = 0, idx = 0; idx != priv->rxqs_n; ++i) {
if (!(*priv->rxqs)[i])
continue;
(*priv->rxqs)[i]->rss_hash = !!rss_conf->rss_hf &&
!!(dev->data->dev_conf.rxmode.mq_mode & ETH_MQ_RX_RSS);
++idx;
}
return 0;
}
/**
* DPDK callback to get the RSS hash configuration.
*
* @param dev
* Pointer to Ethernet device structure.
* @param[in, out] rss_conf
* RSS configuration data.
*
* @return
* 0 on success, a negative errno value otherwise and rte_errno is set.
*/
int
mlx5_rss_hash_conf_get(struct rte_eth_dev *dev,
struct rte_eth_rss_conf *rss_conf)
{
struct mlx5_priv *priv = dev->data->dev_private;
if (!rss_conf) {
rte_errno = EINVAL;
return -rte_errno;
}
if (rss_conf->rss_key &&
(rss_conf->rss_key_len >= priv->rss_conf.rss_key_len)) {
memcpy(rss_conf->rss_key, priv->rss_conf.rss_key,
priv->rss_conf.rss_key_len);
}
rss_conf->rss_key_len = priv->rss_conf.rss_key_len;
rss_conf->rss_hf = priv->rss_conf.rss_hf;
return 0;
}
/**
* Allocate/reallocate RETA index table.
*
* @param dev
* Pointer to Ethernet device.
* @praram reta_size
* The size of the array to allocate.
*
* @return
* 0 on success, a negative errno value otherwise and rte_errno is set.
*/
int
mlx5_rss_reta_index_resize(struct rte_eth_dev *dev, unsigned int reta_size)
{
struct mlx5_priv *priv = dev->data->dev_private;
void *mem;
unsigned int old_size = priv->reta_idx_n;
if (priv->reta_idx_n == reta_size)
return 0;
mem = rte_realloc(priv->reta_idx,
reta_size * sizeof((*priv->reta_idx)[0]), 0);
if (!mem) {
rte_errno = ENOMEM;
return -rte_errno;
}
priv->reta_idx = mem;
priv->reta_idx_n = reta_size;
if (old_size < reta_size)
memset(&(*priv->reta_idx)[old_size], 0,
(reta_size - old_size) *
sizeof((*priv->reta_idx)[0]));
return 0;
}
/**
* DPDK callback to get the RETA indirection table.
*
* @param dev
* Pointer to Ethernet device structure.
* @param reta_conf
* Pointer to RETA configuration structure array.
* @param reta_size
* Size of the RETA table.
*
* @return
* 0 on success, a negative errno value otherwise and rte_errno is set.
*/
int
mlx5_dev_rss_reta_query(struct rte_eth_dev *dev,
struct rte_eth_rss_reta_entry64 *reta_conf,
uint16_t reta_size)
{
struct mlx5_priv *priv = dev->data->dev_private;
unsigned int idx;
unsigned int i;
if (!reta_size || reta_size > priv->reta_idx_n) {
rte_errno = EINVAL;
return -rte_errno;
}
/* Fill each entry of the table even if its bit is not set. */
for (idx = 0, i = 0; (i != reta_size); ++i) {
idx = i / RTE_RETA_GROUP_SIZE;
reta_conf[idx].reta[i % RTE_RETA_GROUP_SIZE] =
(*priv->reta_idx)[i];
}
return 0;
}
/**
* DPDK callback to update the RETA indirection table.
*
* @param dev
* Pointer to Ethernet device structure.
* @param reta_conf
* Pointer to RETA configuration structure array.
* @param reta_size
* Size of the RETA table.
*
* @return
* 0 on success, a negative errno value otherwise and rte_errno is set.
*/
int
mlx5_dev_rss_reta_update(struct rte_eth_dev *dev,
struct rte_eth_rss_reta_entry64 *reta_conf,
uint16_t reta_size)
{
int ret;
struct mlx5_priv *priv = dev->data->dev_private;
unsigned int idx;
unsigned int i;
unsigned int pos;
if (!reta_size) {
rte_errno = EINVAL;
return -rte_errno;
}
ret = mlx5_rss_reta_index_resize(dev, reta_size);
if (ret)
return ret;
for (idx = 0, i = 0; (i != reta_size); ++i) {
idx = i / RTE_RETA_GROUP_SIZE;
pos = i % RTE_RETA_GROUP_SIZE;
if (((reta_conf[idx].mask >> i) & 0x1) == 0)
continue;
assert(reta_conf[idx].reta[pos] < priv->rxqs_n);
(*priv->reta_idx)[i] = reta_conf[idx].reta[pos];
}
if (dev->data->dev_started) {
mlx5_dev_stop(dev);
return mlx5_dev_start(dev);
}
return 0;
}
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