1 /*
2 * Copyright (c) 2018, Mellanox Technologies. All rights reserved.
3 *
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:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
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.
22 *
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
30 * SOFTWARE.
31 */
32 #ifndef __MLX5_EN_XDP_H__
33 #define __MLX5_EN_XDP_H__
34
35 #include "en.h"
36
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_DS_COUNT \
41 ((sizeof(struct mlx5e_tx_wqe) / MLX5_SEND_WQE_DS) + 1 /* SG DS */)
42
43 bool mlx5e_xdp_handle(struct mlx5e_rq *rq, struct mlx5e_dma_info *di,
44 void *va, u16 *rx_headroom, u32 *len);
45 bool mlx5e_poll_xdpsq_cq(struct mlx5e_cq *cq);
46 void mlx5e_free_xdpsq_descs(struct mlx5e_xdpsq *sq);
47
48 bool mlx5e_xmit_xdp_frame(struct mlx5e_xdpsq *sq, struct mlx5e_xdp_info *xdpi);
49 int mlx5e_xdp_xmit(struct net_device *dev, int n, struct xdp_frame **frames,
50 u32 flags);
51
mlx5e_xmit_xdp_doorbell(struct mlx5e_xdpsq * sq)52 static inline void mlx5e_xmit_xdp_doorbell(struct mlx5e_xdpsq *sq)
53 {
54 struct mlx5_wq_cyc *wq = &sq->wq;
55 struct mlx5e_tx_wqe *wqe;
56 u16 pi = mlx5_wq_cyc_ctr2ix(wq, sq->pc - 1); /* last pi */
57
58 wqe = mlx5_wq_cyc_get_wqe(wq, pi);
59
60 mlx5e_notify_hw(wq, sq->pc, sq->uar_map, &wqe->ctrl);
61 }
62
63 #endif
64
