diff options
| author | Boris Pismenny <borisp@mellanox.com> | 2018-07-13 14:33:51 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-07-16 00:13:11 -0700 |
| commit | 10e71acca28262a9db47ce9b0a10dcd8b38bbdeb (patch) | |
| tree | 377d6b367c0de4eb20810c54f62f81ef2b5e5ba9 /drivers/net/ethernet/mellanox/mlx5/core/accel | |
| parent | 790af90c00d277b7fc8bd2ba18fcfa40941bf134 (diff) | |
net/mlx5: Accel, add common metadata functions
This patch adds common functions to handle mellanox metadata headers.
These functions are used by IPsec and TLS to process FPGA metadata.
Signed-off-by: Boris Pismenny <borisp@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx5/core/accel')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/accel/accel.h | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/accel/accel.h b/drivers/net/ethernet/mellanox/mlx5/core/accel/accel.h new file mode 100644 index 000000000000..c13260467750 --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlx5/core/accel/accel.h @@ -0,0 +1,37 @@ +#ifndef __MLX5E_ACCEL_H__ +#define __MLX5E_ACCEL_H__ + +#ifdef CONFIG_MLX5_ACCEL + +#include <linux/skbuff.h> +#include <linux/netdevice.h> +#include "en.h" + +static inline bool is_metadata_hdr_valid(struct sk_buff *skb) +{ + __be16 *ethtype; + + if (unlikely(skb->len < ETH_HLEN + MLX5E_METADATA_ETHER_LEN)) + return false; + ethtype = (__be16 *)(skb->data + ETH_ALEN * 2); + if (*ethtype != cpu_to_be16(MLX5E_METADATA_ETHER_TYPE)) + return false; + return true; +} + +static inline void remove_metadata_hdr(struct sk_buff *skb) +{ + struct ethhdr *old_eth; + struct ethhdr *new_eth; + + /* Remove the metadata from the buffer */ + old_eth = (struct ethhdr *)skb->data; + new_eth = (struct ethhdr *)(skb->data + MLX5E_METADATA_ETHER_LEN); + memmove(new_eth, old_eth, 2 * ETH_ALEN); + /* Ethertype is already in its new place */ + skb_pull_inline(skb, MLX5E_METADATA_ETHER_LEN); +} + +#endif /* CONFIG_MLX5_ACCEL */ + +#endif /* __MLX5E_EN_ACCEL_H__ */ |