diff options
| author | Ido Schimmel <idosch@mellanox.com> | 2015-08-06 17:41:56 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-08-10 08:54:10 +0300 |
| commit | d003462a50de8605e66be0966e6370ab9821e07e (patch) | |
| tree | 3cee43925b4037dc5efd5b6212aa47f2945bbc27 /drivers/net/ethernet/mellanox/mlxsw/pci.c | |
| parent | 7b7b9cff7468fdf38ab189dde6ecb4750b171bc8 (diff) | |
| download | linux-d003462a50de8605e66be0966e6370ab9821e07e.tar.xz | |
mlxsw: Simplify mlxsw_sx_port_xmit function
Previously we only checked if the transmission queue is not full in the
middle of the xmit function. This lead to complex logic due to the fact
that sometimes we need to reallocate the headroom for our Tx header.
Allow the switch driver to know if the transmission queue is not full
before sending the packet and remove this complex logic.
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlxsw/pci.c')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlxsw/pci.c | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/drivers/net/ethernet/mellanox/mlxsw/pci.c b/drivers/net/ethernet/mellanox/mlxsw/pci.c index 3ec52ea10f83..a34f4742aa00 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/pci.c +++ b/drivers/net/ethernet/mellanox/mlxsw/pci.c @@ -1443,6 +1443,15 @@ mlxsw_pci_sdq_pick(struct mlxsw_pci *mlxsw_pci, return mlxsw_pci_sdq_get(mlxsw_pci, sdqn); } +static bool mlxsw_pci_skb_transmit_busy(void *bus_priv, + const struct mlxsw_tx_info *tx_info) +{ + struct mlxsw_pci *mlxsw_pci = bus_priv; + struct mlxsw_pci_queue *q = mlxsw_pci_sdq_pick(mlxsw_pci, tx_info); + + return !mlxsw_pci_queue_elem_info_producer_get(q); +} + static int mlxsw_pci_skb_transmit(void *bus_priv, struct sk_buff *skb, const struct mlxsw_tx_info *tx_info) { @@ -1625,11 +1634,12 @@ err_in_mbox_map: } static const struct mlxsw_bus mlxsw_pci_bus = { - .kind = "pci", - .init = mlxsw_pci_init, - .fini = mlxsw_pci_fini, - .skb_transmit = mlxsw_pci_skb_transmit, - .cmd_exec = mlxsw_pci_cmd_exec, + .kind = "pci", + .init = mlxsw_pci_init, + .fini = mlxsw_pci_fini, + .skb_transmit_busy = mlxsw_pci_skb_transmit_busy, + .skb_transmit = mlxsw_pci_skb_transmit, + .cmd_exec = mlxsw_pci_cmd_exec, }; static int mlxsw_pci_sw_reset(struct mlxsw_pci *mlxsw_pci) |