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Message-ID: <20190612155605.22450-15-maximmi@mellanox.com>
Date: Wed, 12 Jun 2019 15:57:02 +0000
From: Maxim Mikityanskiy <maximmi@...lanox.com>
To: Alexei Starovoitov <ast@...nel.org>,
Daniel Borkmann <daniel@...earbox.net>,
Björn Töpel <bjorn.topel@...el.com>,
Magnus Karlsson <magnus.karlsson@...el.com>
CC: "bpf@...r.kernel.org" <bpf@...r.kernel.org>,
"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
"David S. Miller" <davem@...emloft.net>,
Saeed Mahameed <saeedm@...lanox.com>,
Jonathan Lemon <bsd@...com>,
Tariq Toukan <tariqt@...lanox.com>,
Martin KaFai Lau <kafai@...com>,
Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
Jakub Kicinski <jakub.kicinski@...ronome.com>,
Maciej Fijalkowski <maciejromanfijalkowski@...il.com>,
Maxim Mikityanskiy <maximmi@...lanox.com>
Subject: [PATCH bpf-next v4 14/17] 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 <maximmi@...lanox.com>
Reviewed-by: Tariq Toukan <tariqt@...lanox.com>
Acked-by: Saeed Mahameed <saeedm@...lanox.com>
---
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 <linux/bpf_trace.h>
#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 79f684cb8f51..44557ecd4d34 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
@@ -3724,7 +3724,7 @@ 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;
}
@@ -4169,7 +4169,7 @@ 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;
}
--
2.19.1
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