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ixgbevf: add support for software timestamps 

Add a call to skb_tx_timestamp in the ixgbevf_tx_map function. This
enables software timestamping for packets sent over this device driver.
The call is placed just prior to when we notify hardware of the new
packet, in order to software timestamp as close as possible to when the
hardware will transmit.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Jacob Keller 2018-10-05 09:33:55 -07:00 committed by Jeff Kirsher
parent 7fa57ca443
commit 9fc145fcb5
1 changed files with 2 additions and 0 deletions
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2
drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
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@ -4016,6 +4016,8 @@ static void ixgbevf_tx_map(struct ixgbevf_ring *tx_ring,
/* set the timestamp */
first->time_stamp = jiffies;
skb_tx_timestamp(skb);
/* Force memory writes to complete before letting h/w know there
* are new descriptors to fetch. (Only applicable for weak-ordered
* memory model archs, such as IA-64).