| /* |
| * Copyright (c) 2018, 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. |
| */ |
| #ifndef __MLX5_EN_XDP_H__ |
| #define __MLX5_EN_XDP_H__ |
| |
| #include "en.h" |
| |
| #define MLX5E_XDP_MAX_MTU ((int)(PAGE_SIZE - \ |
| MLX5_SKB_FRAG_SZ(XDP_PACKET_HEADROOM))) |
| #define MLX5E_XDP_MIN_INLINE (ETH_HLEN + VLAN_HLEN) |
| #define MLX5E_XDP_TX_EMPTY_DS_COUNT \ |
| (sizeof(struct mlx5e_tx_wqe) / MLX5_SEND_WQE_DS) |
| #define MLX5E_XDP_TX_DS_COUNT (MLX5E_XDP_TX_EMPTY_DS_COUNT + 1 /* SG DS */) |
| |
| bool mlx5e_xdp_handle(struct mlx5e_rq *rq, struct mlx5e_dma_info *di, |
| void *va, u16 *rx_headroom, u32 *len); |
| bool mlx5e_poll_xdpsq_cq(struct mlx5e_cq *cq, struct mlx5e_rq *rq); |
| void mlx5e_free_xdpsq_descs(struct mlx5e_xdpsq *sq, struct mlx5e_rq *rq); |
| void mlx5e_set_xmit_fp(struct mlx5e_xdpsq *sq, bool is_mpw); |
| void mlx5e_xdp_rx_poll_complete(struct mlx5e_rq *rq); |
| int mlx5e_xdp_xmit(struct net_device *dev, int n, struct xdp_frame **frames, |
| u32 flags); |
| |
| static inline void mlx5e_xmit_xdp_doorbell(struct mlx5e_xdpsq *sq) |
| { |
| if (sq->doorbell_cseg) { |
| mlx5e_notify_hw(&sq->wq, sq->pc, sq->uar_map, sq->doorbell_cseg); |
| sq->doorbell_cseg = NULL; |
| } |
| } |
| |
| static inline void |
| mlx5e_xdp_mpwqe_add_dseg(struct mlx5e_xdpsq *sq, dma_addr_t dma_addr, u16 dma_len) |
| { |
| struct mlx5e_xdp_mpwqe *session = &sq->mpwqe; |
| struct mlx5_wqe_data_seg *dseg = |
| (struct mlx5_wqe_data_seg *)session->wqe + session->ds_count++; |
| |
| dseg->addr = cpu_to_be64(dma_addr); |
| dseg->byte_count = cpu_to_be32(dma_len); |
| dseg->lkey = sq->mkey_be; |
| } |
| |
| static inline void mlx5e_xdpsq_fetch_wqe(struct mlx5e_xdpsq *sq, |
| struct mlx5e_tx_wqe **wqe) |
| { |
| struct mlx5_wq_cyc *wq = &sq->wq; |
| u16 pi = mlx5_wq_cyc_ctr2ix(wq, sq->pc); |
| |
| *wqe = mlx5_wq_cyc_get_wqe(wq, pi); |
| memset(*wqe, 0, sizeof(**wqe)); |
| } |
| |
| static inline void |
| mlx5e_xdpi_fifo_push(struct mlx5e_xdp_info_fifo *fifo, |
| struct mlx5e_xdp_info *xi) |
| { |
| u32 i = (*fifo->pc)++ & fifo->mask; |
| |
| fifo->xi[i] = *xi; |
| } |
| |
| static inline struct mlx5e_xdp_info |
| mlx5e_xdpi_fifo_pop(struct mlx5e_xdp_info_fifo *fifo) |
| { |
| return fifo->xi[(*fifo->cc)++ & fifo->mask]; |
| } |
| |
| #endif |