2 * Copyright (c) 2018, Mellanox Technologies. All rights reserved.
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32 #ifndef __MLX5_EN_XDP_H__
33 #define __MLX5_EN_XDP_H__
37 #define MLX5E_XDP_MAX_MTU ((int)(PAGE_SIZE - \
38 MLX5_SKB_FRAG_SZ(XDP_PACKET_HEADROOM)))
39 #define MLX5E_XDP_MIN_INLINE (ETH_HLEN + VLAN_HLEN)
40 #define MLX5E_XDP_TX_EMPTY_DS_COUNT \
41 (sizeof(struct mlx5e_tx_wqe) / MLX5_SEND_WQE_DS)
42 #define MLX5E_XDP_TX_DS_COUNT (MLX5E_XDP_TX_EMPTY_DS_COUNT + 1 /* SG DS */)
44 bool mlx5e_xdp_handle(struct mlx5e_rq *rq, struct mlx5e_dma_info *di,
45 void *va, u16 *rx_headroom, u32 *len);
46 bool mlx5e_poll_xdpsq_cq(struct mlx5e_cq *cq, struct mlx5e_rq *rq);
47 void mlx5e_free_xdpsq_descs(struct mlx5e_xdpsq *sq, struct mlx5e_rq *rq);
48 void mlx5e_set_xmit_fp(struct mlx5e_xdpsq *sq, bool is_mpw);
49 void mlx5e_xdp_rx_poll_complete(struct mlx5e_rq *rq);
50 int mlx5e_xdp_xmit(struct net_device *dev, int n, struct xdp_frame **frames,
53 static inline void mlx5e_xdp_tx_enable(struct mlx5e_priv *priv)
55 set_bit(MLX5E_STATE_XDP_TX_ENABLED, &priv->state);
58 static inline void mlx5e_xdp_tx_disable(struct mlx5e_priv *priv)
60 clear_bit(MLX5E_STATE_XDP_TX_ENABLED, &priv->state);
61 /* let other device's napi(s) see our new state */
65 static inline bool mlx5e_xdp_tx_is_enabled(struct mlx5e_priv *priv)
67 return test_bit(MLX5E_STATE_XDP_TX_ENABLED, &priv->state);
70 static inline void mlx5e_xmit_xdp_doorbell(struct mlx5e_xdpsq *sq)
72 if (sq->doorbell_cseg) {
73 mlx5e_notify_hw(&sq->wq, sq->pc, sq->uar_map, sq->doorbell_cseg);
74 sq->doorbell_cseg = NULL;
79 mlx5e_xdp_mpwqe_add_dseg(struct mlx5e_xdpsq *sq, dma_addr_t dma_addr, u16 dma_len)
81 struct mlx5e_xdp_mpwqe *session = &sq->mpwqe;
82 struct mlx5_wqe_data_seg *dseg =
83 (struct mlx5_wqe_data_seg *)session->wqe + session->ds_count++;
85 dseg->addr = cpu_to_be64(dma_addr);
86 dseg->byte_count = cpu_to_be32(dma_len);
87 dseg->lkey = sq->mkey_be;
90 static inline void mlx5e_xdpsq_fetch_wqe(struct mlx5e_xdpsq *sq,
91 struct mlx5e_tx_wqe **wqe)
93 struct mlx5_wq_cyc *wq = &sq->wq;
94 u16 pi = mlx5_wq_cyc_ctr2ix(wq, sq->pc);
96 *wqe = mlx5_wq_cyc_get_wqe(wq, pi);
97 memset(*wqe, 0, sizeof(**wqe));
101 mlx5e_xdpi_fifo_push(struct mlx5e_xdp_info_fifo *fifo,
102 struct mlx5e_xdp_info *xi)
104 u32 i = (*fifo->pc)++ & fifo->mask;
109 static inline struct mlx5e_xdp_info
110 mlx5e_xdpi_fifo_pop(struct mlx5e_xdp_info_fifo *fifo)
112 return fifo->xi[(*fifo->cc)++ & fifo->mask];