Contributors: 16
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Maxim Mikityanskiy |
667 |
65.14% |
10 |
23.81% |
| Magnus Karlsson |
84 |
8.20% |
3 |
7.14% |
| Amir Vadai |
79 |
7.71% |
2 |
4.76% |
| Tariq Toukan |
60 |
5.86% |
5 |
11.90% |
| Or Gerlitz |
28 |
2.73% |
3 |
7.14% |
| Saeed Mahameed |
28 |
2.73% |
5 |
11.90% |
| Aya Levin |
12 |
1.17% |
2 |
4.76% |
| Björn Töpel |
12 |
1.17% |
1 |
2.38% |
| Hadar Hen Zion |
12 |
1.17% |
3 |
7.14% |
| Mohamad Haj Yahia |
9 |
0.88% |
1 |
2.38% |
| Achiad Shochat |
8 |
0.78% |
2 |
4.76% |
| Gal Pressman |
8 |
0.78% |
1 |
2.38% |
| Yuval Avnery |
6 |
0.59% |
1 |
2.38% |
| Erez Shitrit |
4 |
0.39% |
1 |
2.38% |
| Maor Gottlieb |
4 |
0.39% |
1 |
2.38% |
| Parav Pandit |
3 |
0.29% |
1 |
2.38% |
| Total |
1024 |
|
42 |
|
// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/* Copyright (c) 2019-2020, Mellanox Technologies inc. All rights reserved. */
#include <net/xdp_sock_drv.h>
#include "pool.h"
#include "setup.h"
#include "en/params.h"
static int mlx5e_xsk_map_pool(struct mlx5e_priv *priv,
struct xsk_buff_pool *pool)
{
struct device *dev = mlx5_core_dma_dev(priv->mdev);
return xsk_pool_dma_map(pool, dev, DMA_ATTR_SKIP_CPU_SYNC);
}
static void mlx5e_xsk_unmap_pool(struct mlx5e_priv *priv,
struct xsk_buff_pool *pool)
{
return xsk_pool_dma_unmap(pool, DMA_ATTR_SKIP_CPU_SYNC);
}
static int mlx5e_xsk_get_pools(struct mlx5e_xsk *xsk)
{
if (!xsk->pools) {
xsk->pools = kcalloc(MLX5E_MAX_NUM_CHANNELS,
sizeof(*xsk->pools), GFP_KERNEL);
if (unlikely(!xsk->pools))
return -ENOMEM;
}
xsk->refcnt++;
xsk->ever_used = true;
return 0;
}
static void mlx5e_xsk_put_pools(struct mlx5e_xsk *xsk)
{
if (!--xsk->refcnt) {
kfree(xsk->pools);
xsk->pools = NULL;
}
}
static int mlx5e_xsk_add_pool(struct mlx5e_xsk *xsk, struct xsk_buff_pool *pool, u16 ix)
{
int err;
err = mlx5e_xsk_get_pools(xsk);
if (unlikely(err))
return err;
xsk->pools[ix] = pool;
return 0;
}
static void mlx5e_xsk_remove_pool(struct mlx5e_xsk *xsk, u16 ix)
{
xsk->pools[ix] = NULL;
mlx5e_xsk_put_pools(xsk);
}
static bool mlx5e_xsk_is_pool_sane(struct xsk_buff_pool *pool)
{
return xsk_pool_get_headroom(pool) <= 0xffff &&
xsk_pool_get_chunk_size(pool) <= 0xffff;
}
void mlx5e_build_xsk_param(struct xsk_buff_pool *pool, struct mlx5e_xsk_param *xsk)
{
xsk->headroom = xsk_pool_get_headroom(pool);
xsk->chunk_size = xsk_pool_get_chunk_size(pool);
xsk->unaligned = pool->unaligned;
}
static int mlx5e_xsk_enable_locked(struct mlx5e_priv *priv,
struct xsk_buff_pool *pool, u16 ix)
{
struct mlx5e_params *params = &priv->channels.params;
struct mlx5e_xsk_param xsk;
struct mlx5e_channel *c;
int err;
if (unlikely(mlx5e_xsk_get_pool(&priv->channels.params, &priv->xsk, ix)))
return -EBUSY;
if (unlikely(!mlx5e_xsk_is_pool_sane(pool)))
return -EINVAL;
err = mlx5e_xsk_map_pool(priv, pool);
if (unlikely(err))
return err;
err = mlx5e_xsk_add_pool(&priv->xsk, pool, ix);
if (unlikely(err))
goto err_unmap_pool;
mlx5e_build_xsk_param(pool, &xsk);
if (priv->channels.params.rq_wq_type == MLX5_WQ_TYPE_LINKED_LIST_STRIDING_RQ &&
mlx5e_mpwrq_umr_mode(priv->mdev, &xsk) == MLX5E_MPWRQ_UMR_MODE_OVERSIZED) {
const char *recommendation = is_power_of_2(xsk.chunk_size) ?
"Upgrade firmware" : "Disable striding RQ";
mlx5_core_warn(priv->mdev, "Expected slowdown with XSK frame size %u. %s for better performance.\n",
xsk.chunk_size, recommendation);
}
if (!test_bit(MLX5E_STATE_OPENED, &priv->state)) {
/* XSK objects will be created on open. */
goto validate_closed;
}
if (!params->xdp_prog) {
/* XSK objects will be created when an XDP program is set,
* and the channels are reopened.
*/
goto validate_closed;
}
c = priv->channels.c[ix];
err = mlx5e_open_xsk(priv, params, &xsk, pool, c);
if (unlikely(err))
goto err_remove_pool;
mlx5e_activate_xsk(c);
mlx5e_trigger_napi_icosq(c);
/* Don't wait for WQEs, because the newer xdpsock sample doesn't provide
* any Fill Ring entries at the setup stage.
*/
mlx5e_rx_res_xsk_update(priv->rx_res, &priv->channels, ix, true);
mlx5e_deactivate_rq(&c->rq);
mlx5e_flush_rq(&c->rq, MLX5_RQC_STATE_RDY);
return 0;
err_remove_pool:
mlx5e_xsk_remove_pool(&priv->xsk, ix);
err_unmap_pool:
mlx5e_xsk_unmap_pool(priv, pool);
return err;
validate_closed:
/* Check the configuration in advance, rather than fail at a later stage
* (in mlx5e_xdp_set or on open) and end up with no channels.
*/
if (!mlx5e_validate_xsk_param(params, &xsk, priv->mdev)) {
err = -EINVAL;
goto err_remove_pool;
}
return 0;
}
static int mlx5e_xsk_disable_locked(struct mlx5e_priv *priv, u16 ix)
{
struct xsk_buff_pool *pool = mlx5e_xsk_get_pool(&priv->channels.params,
&priv->xsk, ix);
struct mlx5e_channel *c;
if (unlikely(!pool))
return -EINVAL;
if (!test_bit(MLX5E_STATE_OPENED, &priv->state))
goto remove_pool;
/* XSK RQ and SQ are only created if XDP program is set. */
if (!priv->channels.params.xdp_prog)
goto remove_pool;
c = priv->channels.c[ix];
mlx5e_activate_rq(&c->rq);
mlx5e_trigger_napi_icosq(c);
mlx5e_wait_for_min_rx_wqes(&c->rq, MLX5E_RQ_WQES_TIMEOUT);
mlx5e_rx_res_xsk_update(priv->rx_res, &priv->channels, ix, false);
mlx5e_deactivate_xsk(c);
mlx5e_close_xsk(c);
remove_pool:
mlx5e_xsk_remove_pool(&priv->xsk, ix);
mlx5e_xsk_unmap_pool(priv, pool);
return 0;
}
static int mlx5e_xsk_enable_pool(struct mlx5e_priv *priv, struct xsk_buff_pool *pool,
u16 ix)
{
int err;
mutex_lock(&priv->state_lock);
err = mlx5e_xsk_enable_locked(priv, pool, ix);
mutex_unlock(&priv->state_lock);
return err;
}
static int mlx5e_xsk_disable_pool(struct mlx5e_priv *priv, u16 ix)
{
int err;
mutex_lock(&priv->state_lock);
err = mlx5e_xsk_disable_locked(priv, ix);
mutex_unlock(&priv->state_lock);
return err;
}
int mlx5e_xsk_setup_pool(struct net_device *dev, struct xsk_buff_pool *pool, u16 qid)
{
struct mlx5e_priv *priv = netdev_priv(dev);
struct mlx5e_params *params = &priv->channels.params;
if (unlikely(qid >= params->num_channels))
return -EINVAL;
return pool ? mlx5e_xsk_enable_pool(priv, pool, qid) :
mlx5e_xsk_disable_pool(priv, qid);
}