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net/mlx5e: Check the minimum inline header mode before xmit 

Each send queue (SQ) has inline mode that defines the minimal required
inline headers in the SQ WQE.
Before sending each packet check that the minimum required headers
on the WQE are copied.

Signed-off-by: Hadar Hen Zion <hadarh@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Hadar Hen Zion 2016-07-24 16:12:39 +03:00 committed by David S. Miller
parent 5fc382d875
commit ae76715d15
3 changed files with 53 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/net/ethernet/mellanox/mlx5/core/en.h
View File

@ -398,6 +398,7 @@ struct mlx5e_sq {
u32 sqn;
u16 bf_buf_size;
u16 max_inline;
u8 min_inline_mode;
u16 edge;
struct device *pdev;
struct mlx5e_tstamp *tstamp;

49
drivers/net/ethernet/mellanox/mlx5/core/en_tx.c
View File

@ -128,6 +128,50 @@ u16 mlx5e_select_queue(struct net_device *dev, struct sk_buff *skb,
return priv->channeltc_to_txq_map[channel_ix][up];
}
static inline int mlx5e_skb_l2_header_offset(struct sk_buff *skb)
{
#define MLX5E_MIN_INLINE (ETH_HLEN + VLAN_HLEN)
return max(skb_network_offset(skb), MLX5E_MIN_INLINE);
}
static inline int mlx5e_skb_l3_header_offset(struct sk_buff *skb)
{
struct flow_keys keys;
if (skb_transport_header_was_set(skb))
return skb_transport_offset(skb);
else if (skb_flow_dissect_flow_keys(skb, &keys, 0))
return keys.control.thoff;
else
return mlx5e_skb_l2_header_offset(skb);
}
static inline unsigned int mlx5e_calc_min_inline(enum mlx5_inline_modes mode,
struct sk_buff *skb)
{
int hlen;
switch (mode) {
case MLX5_INLINE_MODE_TCP_UDP:
hlen = eth_get_headlen(skb->data, skb_headlen(skb));
if (hlen == ETH_HLEN && !skb_vlan_tag_present(skb))
hlen += VLAN_HLEN;
return hlen;
case MLX5_INLINE_MODE_IP:
/* When transport header is set to zero, it means no transport
* header. When transport header is set to 0xff's, it means
* transport header wasn't set.
*/
if (skb_transport_offset(skb))
return mlx5e_skb_l3_header_offset(skb);
/* fall through */
case MLX5_INLINE_MODE_L2:
default:
return mlx5e_skb_l2_header_offset(skb);
}
}
static inline u16 mlx5e_get_inline_hdr_size(struct mlx5e_sq *sq,
struct sk_buff *skb, bool bf)
{
@ -135,8 +179,6 @@ static inline u16 mlx5e_get_inline_hdr_size(struct mlx5e_sq *sq,
* headers and occur before the data gather.
* Therefore these headers must be copied into the WQE
*/
#define MLX5E_MIN_INLINE (ETH_HLEN + VLAN_HLEN)
if (bf) {
u16 ihs = skb_headlen(skb);
@ -146,8 +188,7 @@ static inline u16 mlx5e_get_inline_hdr_size(struct mlx5e_sq *sq,
if (ihs <= sq->max_inline)
return skb_headlen(skb);
}
return max(skb_network_offset(skb), MLX5E_MIN_INLINE);
return mlx5e_calc_min_inline(sq->min_inline_mode, skb);
}
static inline void mlx5e_tx_skb_pull_inline(unsigned char **skb_data,

7
include/linux/mlx5/device.h
View File

@ -129,6 +129,13 @@ __mlx5_mask(typ, fld))
tmp; \
})
enum mlx5_inline_modes {
MLX5_INLINE_MODE_NONE,
MLX5_INLINE_MODE_L2,
MLX5_INLINE_MODE_IP,
MLX5_INLINE_MODE_TCP_UDP,
};
enum {
MLX5_MAX_COMMANDS = 32,
MLX5_CMD_DATA_BLOCK_SIZE = 512,