diff options
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx5/core/en/xdp.h')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/en/xdp.h | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.h b/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.h new file mode 100644 index 000000000..bc2d9034a --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.h @@ -0,0 +1,186 @@ +/* + * 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 <linux/indirect_call_wrapper.h> + +#include "en.h" +#include "en/txrx.h" + +#define MLX5E_XDP_MIN_INLINE (ETH_HLEN + VLAN_HLEN) + +#define MLX5E_XDP_INLINE_WQE_MAX_DS_CNT 16 +#define MLX5E_XDP_INLINE_WQE_SZ_THRSD \ + (MLX5E_XDP_INLINE_WQE_MAX_DS_CNT * MLX5_SEND_WQE_DS - \ + sizeof(struct mlx5_wqe_inline_seg)) + +struct mlx5e_xsk_param; +int mlx5e_xdp_max_mtu(struct mlx5e_params *params, struct mlx5e_xsk_param *xsk); +bool mlx5e_xdp_handle(struct mlx5e_rq *rq, struct page *page, + struct bpf_prog *prog, struct xdp_buff *xdp); +void mlx5e_xdp_mpwqe_complete(struct mlx5e_xdpsq *sq); +bool mlx5e_poll_xdpsq_cq(struct mlx5e_cq *cq); +void mlx5e_free_xdpsq_descs(struct mlx5e_xdpsq *sq); +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); + +INDIRECT_CALLABLE_DECLARE(bool mlx5e_xmit_xdp_frame_mpwqe(struct mlx5e_xdpsq *sq, + struct mlx5e_xmit_data *xdptxd, + struct skb_shared_info *sinfo, + int check_result)); +INDIRECT_CALLABLE_DECLARE(bool mlx5e_xmit_xdp_frame(struct mlx5e_xdpsq *sq, + struct mlx5e_xmit_data *xdptxd, + struct skb_shared_info *sinfo, + int check_result)); +INDIRECT_CALLABLE_DECLARE(int mlx5e_xmit_xdp_frame_check_mpwqe(struct mlx5e_xdpsq *sq)); +INDIRECT_CALLABLE_DECLARE(int mlx5e_xmit_xdp_frame_check(struct mlx5e_xdpsq *sq)); + +static inline void mlx5e_xdp_tx_enable(struct mlx5e_priv *priv) +{ + set_bit(MLX5E_STATE_XDP_TX_ENABLED, &priv->state); + + if (priv->channels.params.xdp_prog) + set_bit(MLX5E_STATE_XDP_ACTIVE, &priv->state); +} + +static inline void mlx5e_xdp_tx_disable(struct mlx5e_priv *priv) +{ + if (priv->channels.params.xdp_prog) + clear_bit(MLX5E_STATE_XDP_ACTIVE, &priv->state); + + clear_bit(MLX5E_STATE_XDP_TX_ENABLED, &priv->state); + /* Let other device's napi(s) and XSK wakeups see our new state. */ + synchronize_net(); +} + +static inline bool mlx5e_xdp_tx_is_enabled(struct mlx5e_priv *priv) +{ + return test_bit(MLX5E_STATE_XDP_TX_ENABLED, &priv->state); +} + +static inline bool mlx5e_xdp_is_active(struct mlx5e_priv *priv) +{ + return test_bit(MLX5E_STATE_XDP_ACTIVE, &priv->state); +} + +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; + } +} + +/* Enable inline WQEs to shift some load from a congested HCA (HW) to + * a less congested cpu (SW). + */ +static inline bool mlx5e_xdp_get_inline_state(struct mlx5e_xdpsq *sq, bool cur) +{ + u16 outstanding = sq->xdpi_fifo_pc - sq->xdpi_fifo_cc; + +#define MLX5E_XDP_INLINE_WATERMARK_LOW 10 +#define MLX5E_XDP_INLINE_WATERMARK_HIGH 128 + + if (cur && outstanding <= MLX5E_XDP_INLINE_WATERMARK_LOW) + return false; + + if (!cur && outstanding >= MLX5E_XDP_INLINE_WATERMARK_HIGH) + return true; + + return cur; +} + +static inline bool mlx5e_xdp_mpwqe_is_full(struct mlx5e_tx_mpwqe *session, u8 max_sq_mpw_wqebbs) +{ + if (session->inline_on) + return session->ds_count + MLX5E_XDP_INLINE_WQE_MAX_DS_CNT > + max_sq_mpw_wqebbs * MLX5_SEND_WQEBB_NUM_DS; + + return mlx5e_tx_mpwqe_is_full(session, max_sq_mpw_wqebbs); +} + +struct mlx5e_xdp_wqe_info { + u8 num_wqebbs; + u8 num_pkts; +}; + +static inline void +mlx5e_xdp_mpwqe_add_dseg(struct mlx5e_xdpsq *sq, + struct mlx5e_xmit_data *xdptxd, + struct mlx5e_xdpsq_stats *stats) +{ + struct mlx5e_tx_mpwqe *session = &sq->mpwqe; + struct mlx5_wqe_data_seg *dseg = + (struct mlx5_wqe_data_seg *)session->wqe + session->ds_count; + u32 dma_len = xdptxd->len; + + session->pkt_count++; + session->bytes_count += dma_len; + + if (session->inline_on && dma_len <= MLX5E_XDP_INLINE_WQE_SZ_THRSD) { + struct mlx5_wqe_inline_seg *inline_dseg = + (struct mlx5_wqe_inline_seg *)dseg; + u16 ds_len = sizeof(*inline_dseg) + dma_len; + u16 ds_cnt = DIV_ROUND_UP(ds_len, MLX5_SEND_WQE_DS); + + inline_dseg->byte_count = cpu_to_be32(dma_len | MLX5_INLINE_SEG); + memcpy(inline_dseg->data, xdptxd->data, dma_len); + + session->ds_count += ds_cnt; + stats->inlnw++; + return; + } + + dseg->addr = cpu_to_be64(xdptxd->dma_addr); + dseg->byte_count = cpu_to_be32(dma_len); + dseg->lkey = sq->mkey_be; + session->ds_count++; +} + +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 |