Commit a798fbac authored by Jesus Sanchez-Palencia's avatar Jesus Sanchez-Palencia Committed by Jeff Kirsher

igb: Use an advanced ctx descriptor for launchtime

On i210, Launchtime (TxTime) requires the usage of an "Advanced
Transmit Context Descriptor" for retrieving the timestamp of a packet.

The igb driver correctly builds such descriptor on the segmentation
flow (i.e. igb_tso()) or on the checksum one (i.e. igb_tx_csum()), but the
feature is broken for AF_PACKET if the IGB_TX_FLAGS_VLAN is not set,
which happens due to an early return on igb_tx_csum().

This flag is only set by the kernel when a VLAN interface is used,
thus we can't just rely on it. Here we are fixing this issue by checking
if launchtime is enabled for the current tx_ring before performing the
early return.
Signed-off-by: default avatarJesus Sanchez-Palencia <jesus.sanchez-palencia@intel.com>
Tested-by: default avatarAaron Brown <aaron.f.brown@intel.com>
Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
parent ee400a3f
......@@ -5816,7 +5816,8 @@ static void igb_tx_csum(struct igb_ring *tx_ring, struct igb_tx_buffer *first)
if (skb->ip_summed != CHECKSUM_PARTIAL) {
csum_failed:
if (!(first->tx_flags & IGB_TX_FLAGS_VLAN))
if (!(first->tx_flags & IGB_TX_FLAGS_VLAN) &&
!tx_ring->launchtime_enable)
return;
goto no_csum;
}
......
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