[Intel-wired-lan] [net-next v6 0/4] igb: enable RX network flow classification

[Gangfeng]

After apply this series of patches, igb driver will supports advanced
RX filter that direct receive packets by flows to different hardware
queue. Enables tight control on routing a flow in the platform.

In our product, we use the the RX traffic classification to gurantee the
PTP(ethertype is 0x88F7) packets won't be flooded by best effort packet.
PTP packets is always be processed by Linux network stack.

step 1. 
  use the ethertype filter to filter most of packet(0x0800) to HW queue;
step 2.
  Add a rule to forward the PTP packets to another HW queue

The ethtool commands and options:

-n --show-nfc
   Retrieves the receive network flow classification configurations

-N --config-nfc
   Configures the receive network flow classification classification

Change history of this patches:
Version 1:
  Split the patch to 3 patches for review;
  Save the filters and restore them after a reset;
  In ethtool command, use key word "proto" to replace "vlan-etype:
  Fix bugs
Version 2:
  Rebase the patches on the the latest dev-queue;
Version 3:
  Report a meaningful error code for misoperation;
Version 4:
  Rebase the patches on latest dev-queue;
  Update the patch description and code comments; 
Version 5:
  Rebase the patches on latest dev-queue;
  Update the patch description; 
Version 6:
  Init the nfc_lock in igb_sw_init()

Gangfeng Huang (4):
  igb: add support of RX network flow classification
  igb: support RX flow classification by ethertype
  igb: support RX flow classification by VLAN priority
  igb: fix error code in igb_add_ethtool_nfc_entry()

 drivers/net/ethernet/intel/igb/e1000_82575.h   |   5 +
 drivers/net/ethernet/intel/igb/e1000_defines.h |   4 +
 drivers/net/ethernet/intel/igb/e1000_regs.h    |   1 +
 drivers/net/ethernet/intel/igb/igb.h           |  53 ++++
 drivers/net/ethernet/intel/igb/igb_ethtool.c   | 345 +++++++++++++++++++++++++
 drivers/net/ethernet/intel/igb/igb_main.c      |  45 ++++
 drivers/net/ethernet/intel/igb/igb_ptp.c       |   4 +-
 7 files changed, 455 insertions(+), 2 deletions(-)

-- 
2.7.2