Commit d7cd206d authored by Petr Machata's avatar Petr Machata Committed by David S. Miller

mlxsw: core: Add support for using SKB control buffer

The SKB control buffer is useful (and used) for bookkeeping of information
related to that SKB. Add helpers so that the mlxsw driver(s) can safely use
the buffer as well. The structure is currently empty, individual users will
add members to it as necessary.

Note that SKB allocation functions already clear the buffer, so the cleanup
is only necessary when ndo_start_xmit is called.
Signed-off-by: default avatarPetr Machata <petrm@mellanox.com>
Acked-by: default avatarJiri Pirko <jiri@mellanox.com>
Signed-off-by: default avatarIdo Schimmel <idosch@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent aed4b572
...@@ -418,4 +418,13 @@ enum mlxsw_devlink_param_id { ...@@ -418,4 +418,13 @@ enum mlxsw_devlink_param_id {
MLXSW_DEVLINK_PARAM_ID_ACL_REGION_REHASH_INTERVAL, MLXSW_DEVLINK_PARAM_ID_ACL_REGION_REHASH_INTERVAL,
}; };
struct mlxsw_skb_cb {
};
static inline struct mlxsw_skb_cb *mlxsw_skb_cb(struct sk_buff *skb)
{
BUILD_BUG_ON(sizeof(mlxsw_skb_cb) > sizeof(skb->cb));
return (struct mlxsw_skb_cb *) skb->cb;
}
#endif #endif
...@@ -790,6 +790,8 @@ static netdev_tx_t mlxsw_sp_port_xmit(struct sk_buff *skb, ...@@ -790,6 +790,8 @@ static netdev_tx_t mlxsw_sp_port_xmit(struct sk_buff *skb,
u64 len; u64 len;
int err; int err;
memset(skb->cb, 0, sizeof(struct mlxsw_skb_cb));
if (mlxsw_core_skb_transmit_busy(mlxsw_sp->core, &tx_info)) if (mlxsw_core_skb_transmit_busy(mlxsw_sp->core, &tx_info))
return NETDEV_TX_BUSY; return NETDEV_TX_BUSY;
......
...@@ -299,6 +299,8 @@ static netdev_tx_t mlxsw_sx_port_xmit(struct sk_buff *skb, ...@@ -299,6 +299,8 @@ static netdev_tx_t mlxsw_sx_port_xmit(struct sk_buff *skb,
u64 len; u64 len;
int err; int err;
memset(skb->cb, 0, sizeof(struct mlxsw_skb_cb));
if (mlxsw_core_skb_transmit_busy(mlxsw_sx->core, &tx_info)) if (mlxsw_core_skb_transmit_busy(mlxsw_sx->core, &tx_info))
return NETDEV_TX_BUSY; return NETDEV_TX_BUSY;
......
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