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ixgbe: clean up Rx time stamping code

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Time stamping resources are per-interface so there is no need
to keep separate last_rx_timestamp for each Rx ring, move
last_rx_timestamp to the adapter structure.

With last_rx_timestamp inside adapter, ixgbe_ptp_rx_hwtstamp()
inline function is reduced to a single if statement so it is
no longer necessary. If statement is placed directly in
ixgbe_process_skb_fields() fixing likely/unlikely marking.

Checks for q_vector or adapter to be NULL are superfluous.

Comment about taking I/O hit is a leftover from previous design.

Signed-off-by: Jakub Kicinski <kubakici@wp.pl>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Jakub Kicinski 2014-04-02 10:33:28 +00:00 • committed by Jeff Kirsher
parent e66c083aab
commit eda183c21a
3 changed files with 15 additions and 45 deletions
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3
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
View file

@ -1664,7 +1664,8 @@ static void ixgbe_process_skb_fields(struct ixgbe_ring *rx_ring,
ixgbe_rx_checksum(rx_ring, rx_desc, skb);
ixgbe_ptp_rx_hwtstamp(rx_ring, rx_desc, skb);
if (unlikely(ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_STAT_TS)))
ixgbe_ptp_rx_hwtstamp(rx_ring->q_vector->adapter, skb);
if ((dev->features & NETIF_F_HW_VLAN_CTAG_RX) &&
ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_VP)) {