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| author | Petr Machata | 2019-06-30 08:04:53 +0200 |
|---|---|---|
| committer | David S. Miller | 2019-07-02 03:58:34 +0200 |
| commit | 0714256c3d76793b6ce52e74b4fa207cfb502246 (patch) | |
| tree | 2c8ed35eb37f57dde9fbe4f586c47345e26156fd /drivers/net/ethernet/mellanox/mlxsw/core.h | |
| parent | mlxsw: core: Add support for using SKB control buffer (diff) | |
| download | kernel-qcow2-linux-0714256c3d76793b6ce52e74b4fa207cfb502246.tar.gz kernel-qcow2-linux-0714256c3d76793b6ce52e74b4fa207cfb502246.tar.xz kernel-qcow2-linux-0714256c3d76793b6ce52e74b4fa207cfb502246.zip | |
mlxsw: pci: PTP: Hook into packet transmit path
On Spectrum-1, timestamps are delivered separately from the packets, and
need to paired up. Therefore, at some point after mlxsw_sp_port_xmit()
is invoked, it is necessary to involve the chip-specific driver code to
allow it to do the necessary bookkeeping and matching.
On Spectrum-2, timestamps are delivered in CQE. For that reason,
position the point of driver involvement into mlxsw_pci_cqe_sdq_handle()
to make it hopefully easier to extend for Spectrum-2 in the future.
To tell the driver what port the packet was sent on, keep tx_info
in SKB control buffer.
Introduce a new driver core interface mlxsw_core_ptp_transmitted(), a
driver callback ptp_transmitted, and a PTP op transmitted. The callee is
responsible for taking care of releasing the SKB passed to the new
interfaces, and correspondingly have the new stub callbacks just call
dev_kfree_skb_any().
Follow-up patches will introduce the actual content into
mlxsw_sp1_ptp_transmitted() in particular.
Signed-off-by: Petr Machata <petrm@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlxsw/core.h')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlxsw/core.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlxsw/core.h b/drivers/net/ethernet/mellanox/mlxsw/core.h index 06babcc58c7a..8efcff4b59cb 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/core.h +++ b/drivers/net/ethernet/mellanox/mlxsw/core.h @@ -48,6 +48,8 @@ bool mlxsw_core_skb_transmit_busy(struct mlxsw_core *mlxsw_core, const struct mlxsw_tx_info *tx_info); int mlxsw_core_skb_transmit(struct mlxsw_core *mlxsw_core, struct sk_buff *skb, const struct mlxsw_tx_info *tx_info); +void mlxsw_core_ptp_transmitted(struct mlxsw_core *mlxsw_core, + struct sk_buff *skb, u8 local_port); struct mlxsw_rx_listener { void (*func)(struct sk_buff *skb, u8 local_port, void *priv); @@ -296,6 +298,13 @@ struct mlxsw_driver { u64 *p_linear_size); int (*params_register)(struct mlxsw_core *mlxsw_core); void (*params_unregister)(struct mlxsw_core *mlxsw_core); + + /* Notify a driver that a timestamped packet was transmitted. Driver + * is responsible for freeing the passed-in SKB. + */ + void (*ptp_transmitted)(struct mlxsw_core *mlxsw_core, + struct sk_buff *skb, u8 local_port); + u8 txhdr_len; const struct mlxsw_config_profile *profile; bool res_query_enabled; @@ -419,6 +428,7 @@ enum mlxsw_devlink_param_id { }; struct mlxsw_skb_cb { + struct mlxsw_tx_info tx_info; }; static inline struct mlxsw_skb_cb *mlxsw_skb_cb(struct sk_buff *skb) |