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net/mlx5: Accel, add common metadata functions

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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>
This commit is contained in:
Boris Pismenny 2018-07-13 14:33:51 +03:00 committed by David S. Miller
parent 790af90c00
commit 10e71acca2
3 changed files with 45 additions and 29 deletions
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37
drivers/net/ethernet/mellanox/mlx5/core/accel/accel.h Normal file
View File

@ -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__ */

19
drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec_rxtx.c
View File

@ -37,6 +37,7 @@
#include "en_accel/ipsec_rxtx.h"
#include "en_accel/ipsec.h"
#include "accel/accel.h"
#include "en.h"
enum {
@ -346,19 +347,12 @@ mlx5e_ipsec_build_sp(struct net_device *netdev, struct sk_buff *skb,
}
struct sk_buff *mlx5e_ipsec_handle_rx_skb(struct net_device *netdev,
struct sk_buff *skb)
struct sk_buff *skb, u32 *cqe_bcnt)
{
struct mlx5e_ipsec_metadata *mdata;
struct ethhdr *old_eth;
struct ethhdr *new_eth;
struct xfrm_state *xs;
__be16 *ethtype;
/* Detect inline metadata */
if (skb->len < ETH_HLEN + MLX5E_METADATA_ETHER_LEN)
return skb;
ethtype = (__be16 *)(skb->data + ETH_ALEN * 2);
if (*ethtype != cpu_to_be16(MLX5E_METADATA_ETHER_TYPE))
if (!is_metadata_hdr_valid(skb))
return skb;
/* Use the metadata */
@ -369,12 +363,7 @@ struct sk_buff *mlx5e_ipsec_handle_rx_skb(struct net_device *netdev,
return NULL;
}
/* 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);
remove_metadata_hdr(skb);
return skb;
}

18
drivers/net/ethernet/mellanox/mlx5/core/en_accel/tls_rxtx.c
View File

@ -33,6 +33,8 @@
#include "en_accel/tls.h"
#include "en_accel/tls_rxtx.h"
#include "accel/accel.h"
#include <net/inet6_hashtables.h>
#include <linux/ipv6.h>
@ -350,16 +352,9 @@ void mlx5e_tls_handle_rx_skb(struct net_device *netdev, struct sk_buff *skb,
u32 *cqe_bcnt)
{
struct mlx5e_tls_metadata *mdata;
struct ethhdr *old_eth;
struct ethhdr *new_eth;
__be16 *ethtype;
struct mlx5e_priv *priv;
/* Detect inline metadata */
if (skb->len < ETH_HLEN + MLX5E_METADATA_ETHER_LEN)
return;
ethtype = (__be16 *)(skb->data + ETH_ALEN * 2);
if (*ethtype != cpu_to_be16(MLX5E_METADATA_ETHER_TYPE))
if (!is_metadata_hdr_valid(skb))
return;
/* Use the metadata */
@ -383,11 +378,6 @@ void mlx5e_tls_handle_rx_skb(struct net_device *netdev, struct sk_buff *skb,
return;
}
/* 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);
remove_metadata_hdr(skb);
*cqe_bcnt -= MLX5E_METADATA_ETHER_LEN;
}