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 | 57 |
1 files changed, 54 insertions, 3 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.h b/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.h index 553956cadc8a..8b537a4b0840 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.h +++ b/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.h @@ -74,16 +74,68 @@ static inline void mlx5e_xmit_xdp_doorbell(struct mlx5e_xdpsq *sq) } } +/* Enable inline WQEs to shift some load from a congested HCA (HW) to + * a less congested cpu (SW). + */ +static inline void mlx5e_xdp_update_inline_state(struct mlx5e_xdpsq *sq) +{ + u16 outstanding = sq->xdpi_fifo_pc - sq->xdpi_fifo_cc; + struct mlx5e_xdp_mpwqe *session = &sq->mpwqe; + +#define MLX5E_XDP_INLINE_WATERMARK_LOW 10 +#define MLX5E_XDP_INLINE_WATERMARK_HIGH 128 + + if (session->inline_on) { + if (outstanding <= MLX5E_XDP_INLINE_WATERMARK_LOW) + session->inline_on = 0; + return; + } + + /* inline is false */ + if (outstanding >= MLX5E_XDP_INLINE_WATERMARK_HIGH) + session->inline_on = 1; +} + static inline void -mlx5e_xdp_mpwqe_add_dseg(struct mlx5e_xdpsq *sq, dma_addr_t dma_addr, u16 dma_len) +mlx5e_xdp_mpwqe_add_dseg(struct mlx5e_xdpsq *sq, struct mlx5e_xdp_info *xdpi, + struct mlx5e_xdpsq_stats *stats) { struct mlx5e_xdp_mpwqe *session = &sq->mpwqe; + dma_addr_t dma_addr = xdpi->dma_addr; + struct xdp_frame *xdpf = xdpi->xdpf; struct mlx5_wqe_data_seg *dseg = - (struct mlx5_wqe_data_seg *)session->wqe + session->ds_count++; + (struct mlx5_wqe_data_seg *)session->wqe + session->ds_count; + u16 dma_len = xdpf->len; + session->pkt_count++; + +#define MLX5E_XDP_INLINE_WQE_SZ_THRSD (256 - sizeof(struct mlx5_wqe_inline_seg)) + + 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); + + if (unlikely(session->ds_count + ds_cnt > session->max_ds_count)) { + /* Not enough space for inline wqe, send with memory pointer */ + session->complete = true; + goto no_inline; + } + + inline_dseg->byte_count = cpu_to_be32(dma_len | MLX5_INLINE_SEG); + memcpy(inline_dseg->data, xdpf->data, dma_len); + + session->ds_count += ds_cnt; + stats->inlnw++; + return; + } + +no_inline: dseg->addr = cpu_to_be64(dma_addr); dseg->byte_count = cpu_to_be32(dma_len); dseg->lkey = sq->mkey_be; + session->ds_count++; } static inline void mlx5e_xdpsq_fetch_wqe(struct mlx5e_xdpsq *sq, @@ -110,5 +162,4 @@ mlx5e_xdpi_fifo_pop(struct mlx5e_xdp_info_fifo *fifo) { return fifo->xi[(*fifo->cc)++ & fifo->mask]; } - #endif |