From a011b49f4ed7813777a15da12a426ab939c58f14 Mon Sep 17 00:00:00 2001 From: Maxim Mikityanskiy Date: Wed, 26 Jun 2019 17:35:35 +0300 Subject: net/mlx5e: Consider XSK in XDP MTU limit calculation Use the existing mlx5e_get_linear_rq_headroom function to calculate the headroom for mlx5e_xdp_max_mtu. This function takes the XSK headroom into consideration, which will be used in the following patches. Signed-off-by: Maxim Mikityanskiy Signed-off-by: Tariq Toukan Acked-by: Saeed Mahameed Signed-off-by: Daniel Borkmann --- drivers/net/ethernet/mellanox/mlx5/core/en/params.c | 4 ++-- drivers/net/ethernet/mellanox/mlx5/core/en/params.h | 2 ++ drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c | 5 +++-- drivers/net/ethernet/mellanox/mlx5/core/en/xdp.h | 3 ++- drivers/net/ethernet/mellanox/mlx5/core/en_main.c | 4 ++-- 5 files changed, 11 insertions(+), 7 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/params.c b/drivers/net/ethernet/mellanox/mlx5/core/en/params.c index 50a458dc3836..0de908b12fcc 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en/params.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en/params.c @@ -9,8 +9,8 @@ static inline bool mlx5e_rx_is_xdp(struct mlx5e_params *params, return params->xdp_prog || xsk; } -static inline u16 mlx5e_get_linear_rq_headroom(struct mlx5e_params *params, - struct mlx5e_xsk_param *xsk) +u16 mlx5e_get_linear_rq_headroom(struct mlx5e_params *params, + struct mlx5e_xsk_param *xsk) { u16 headroom = NET_IP_ALIGN; diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/params.h b/drivers/net/ethernet/mellanox/mlx5/core/en/params.h index ed420f3efe52..7f29b82dd8c2 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en/params.h +++ b/drivers/net/ethernet/mellanox/mlx5/core/en/params.h @@ -11,6 +11,8 @@ struct mlx5e_xsk_param { u16 chunk_size; }; +u16 mlx5e_get_linear_rq_headroom(struct mlx5e_params *params, + struct mlx5e_xsk_param *xsk); u32 mlx5e_rx_get_linear_frag_sz(struct mlx5e_params *params, struct mlx5e_xsk_param *xsk); u8 mlx5e_mpwqe_log_pkts_per_wqe(struct mlx5e_params *params); diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c b/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c index 1364bdff702c..ee99efde9143 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c @@ -32,10 +32,11 @@ #include #include "en/xdp.h" +#include "en/params.h" -int mlx5e_xdp_max_mtu(struct mlx5e_params *params) +int mlx5e_xdp_max_mtu(struct mlx5e_params *params, struct mlx5e_xsk_param *xsk) { - int hr = NET_IP_ALIGN + XDP_PACKET_HEADROOM; + int hr = mlx5e_get_linear_rq_headroom(params, xsk); /* Let S := SKB_DATA_ALIGN(sizeof(struct skb_shared_info)). * The condition checked in mlx5e_rx_is_linear_skb is: diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.h b/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.h index 86db5ad49a42..9200cb9f499b 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.h +++ b/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.h @@ -39,7 +39,8 @@ (sizeof(struct mlx5e_tx_wqe) / MLX5_SEND_WQE_DS) #define MLX5E_XDP_TX_DS_COUNT (MLX5E_XDP_TX_EMPTY_DS_COUNT + 1 /* SG DS */) -int mlx5e_xdp_max_mtu(struct mlx5e_params *params); +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 mlx5e_dma_info *di, void *va, u16 *rx_headroom, u32 *len); bool mlx5e_poll_xdpsq_cq(struct mlx5e_cq *cq); diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c index abc1d0f6cf53..96fb3fa32d63 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c @@ -3722,7 +3722,7 @@ int mlx5e_change_mtu(struct net_device *netdev, int new_mtu, if (params->xdp_prog && !mlx5e_rx_is_linear_skb(&new_channels.params)) { netdev_err(netdev, "MTU(%d) > %d is not allowed while XDP enabled\n", - new_mtu, mlx5e_xdp_max_mtu(params)); + new_mtu, mlx5e_xdp_max_mtu(params, NULL)); err = -EINVAL; goto out; } @@ -4167,7 +4167,7 @@ static int mlx5e_xdp_allowed(struct mlx5e_priv *priv, struct bpf_prog *prog) if (!mlx5e_rx_is_linear_skb(&new_channels.params)) { netdev_warn(netdev, "XDP is not allowed with MTU(%d) > %d\n", new_channels.params.sw_mtu, - mlx5e_xdp_max_mtu(&new_channels.params)); + mlx5e_xdp_max_mtu(&new_channels.params, NULL)); return -EINVAL; } -- cgit v1.2.3