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/*
* Copyright (c) 2016, Mellanox Technologies. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* 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.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "en.h"
#include "en/dim.h"
static void
mlx5e_complete_dim_work(struct dim *dim, struct dim_cq_moder moder,
struct mlx5_core_dev *mdev, struct mlx5_core_cq *mcq)
{
mlx5e_modify_cq_moderation(mdev, mcq, moder.usec, moder.pkts,
mlx5e_cq_period_mode(moder.cq_period_mode));
dim->state = DIM_START_MEASURE;
}
void mlx5e_rx_dim_work(struct work_struct *work)
{
struct dim *dim = container_of(work, struct dim, work);
struct mlx5e_rq *rq = dim->priv;
struct dim_cq_moder cur_moder =
net_dim_get_rx_moderation(dim->mode, dim->profile_ix);
mlx5e_complete_dim_work(dim, cur_moder, rq->mdev, &rq->cq.mcq);
}
void mlx5e_tx_dim_work(struct work_struct *work)
{
struct dim *dim = container_of(work, struct dim, work);
struct mlx5e_txqsq *sq = dim->priv;
struct dim_cq_moder cur_moder =
net_dim_get_tx_moderation(dim->mode, dim->profile_ix);
mlx5e_complete_dim_work(dim, cur_moder, sq->cq.mdev, &sq->cq.mcq);
}
static struct dim *mlx5e_dim_enable(struct mlx5_core_dev *mdev,
void (*work_fun)(struct work_struct *), int cpu,
u8 cq_period_mode, struct mlx5_core_cq *mcq,
void *queue)
{
struct dim *dim;
int err;
dim = kvzalloc_node(sizeof(*dim), GFP_KERNEL, cpu_to_node(cpu));
if (!dim)
return ERR_PTR(-ENOMEM);
INIT_WORK(&dim->work, work_fun);
dim->mode = cq_period_mode;
dim->priv = queue;
err = mlx5e_modify_cq_period_mode(mdev, mcq, dim->mode);
if (err) {
kvfree(dim);
return ERR_PTR(err);
}
return dim;
}
static void mlx5e_dim_disable(struct dim *dim)
{
cancel_work_sync(&dim->work);
kvfree(dim);
}
int mlx5e_dim_rx_change(struct mlx5e_rq *rq, bool enable)
{
if (enable == !!rq->dim)
return 0;
if (enable) {
struct mlx5e_channel *c = rq->channel;
struct dim *dim;
dim = mlx5e_dim_enable(rq->mdev, mlx5e_rx_dim_work, c->cpu,
c->rx_cq_moder.cq_period_mode, &rq->cq.mcq, rq);
if (IS_ERR(dim))
return PTR_ERR(dim);
rq->dim = dim;
__set_bit(MLX5E_RQ_STATE_DIM, &rq->state);
} else {
__clear_bit(MLX5E_RQ_STATE_DIM, &rq->state);
synchronize_net();
mlx5e_dim_disable(rq->dim);
rq->dim = NULL;
}
return 0;
}
int mlx5e_dim_tx_change(struct mlx5e_txqsq *sq, bool enable)
{
if (enable == !!sq->dim)
return 0;
if (enable) {
struct mlx5e_channel *c = sq->channel;
struct dim *dim;
dim = mlx5e_dim_enable(sq->mdev, mlx5e_tx_dim_work, c->cpu,
c->tx_cq_moder.cq_period_mode, &sq->cq.mcq, sq);
if (IS_ERR(dim))
return PTR_ERR(dim);
sq->dim = dim;
__set_bit(MLX5E_SQ_STATE_DIM, &sq->state);
} else {
__clear_bit(MLX5E_SQ_STATE_DIM, &sq->state);
synchronize_net();
mlx5e_dim_disable(sq->dim);
sq->dim = NULL;
}
return 0;
}
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