/*
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* Copyright (c) 2018, Mellanox Technologies. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#ifndef __MLX5_EN_XDP_H__
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#define __MLX5_EN_XDP_H__
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#include "en.h"
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#define MLX5E_XDP_MIN_INLINE (ETH_HLEN + VLAN_HLEN)
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#define MLX5E_XDP_TX_DS_COUNT \
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((sizeof(struct mlx5e_tx_wqe) / MLX5_SEND_WQE_DS) + 1 /* SG DS */)
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int mlx5e_xdp_max_mtu(struct mlx5e_params *params);
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bool mlx5e_xdp_handle(struct mlx5e_rq *rq, struct mlx5e_dma_info *di,
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void *va, u16 *rx_headroom, u32 *len);
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bool mlx5e_poll_xdpsq_cq(struct mlx5e_cq *cq);
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void mlx5e_free_xdpsq_descs(struct mlx5e_xdpsq *sq);
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bool mlx5e_xmit_xdp_frame(struct mlx5e_xdpsq *sq, struct mlx5e_xdp_info *xdpi);
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int mlx5e_xdp_xmit(struct net_device *dev, int n, struct xdp_frame **frames,
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u32 flags);
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static inline void mlx5e_xdp_tx_enable(struct mlx5e_priv *priv)
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{
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set_bit(MLX5E_STATE_XDP_TX_ENABLED, &priv->state);
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}
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static inline void mlx5e_xdp_tx_disable(struct mlx5e_priv *priv)
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{
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clear_bit(MLX5E_STATE_XDP_TX_ENABLED, &priv->state);
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/* let other device's napi(s) see our new state */
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synchronize_rcu();
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}
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static inline bool mlx5e_xdp_tx_is_enabled(struct mlx5e_priv *priv)
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{
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return test_bit(MLX5E_STATE_XDP_TX_ENABLED, &priv->state);
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}
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static inline void mlx5e_xmit_xdp_doorbell(struct mlx5e_xdpsq *sq)
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{
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struct mlx5_wq_cyc *wq = &sq->wq;
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struct mlx5e_tx_wqe *wqe;
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u16 pi = mlx5_wq_cyc_ctr2ix(wq, sq->pc - 1); /* last pi */
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wqe = mlx5_wq_cyc_get_wqe(wq, pi);
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mlx5e_notify_hw(wq, sq->pc, sq->uar_map, &wqe->ctrl);
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}
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#endif
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