[Intel-wired-lan] [PATCH v4 0/4] i40e: Support for XDP

[Björn Töpel]

From: Björn Töpel <bjorn.topel at intel.com>

This series adds XDP support for i40e-based NICs.

The first patch prepares i40e_fetch_rx_buffer() for upcoming changes,
followed by XDP_RX support, the third adds XDP_TX support and the last
patch validates bpf_xdp_adjust_head() support.

Thanks to Alex, Daniel, John and Scott for all the feedback!

v4:
  * Removed unused i40e_page_is_reserved function
  * Prior running the XDP program, set the struct xdp_buff
    data_hard_start member

v3:
  * Rebased patch set on Jeff's dev-queue branch
  * MSI-X is no longer a prerequisite for XDP
  * RCU locking for the XDP program and XDP_RX support is introduced
    in the same patch
  * Rx bytes is now bumped for XDP
  * Removed pointer-to-pointer clunkiness
  * Added comments to XDP preconditions in ndo_xdp
  * When a non-EOF is received, log once, and drop the frame

v2:
  * Fixed kbuild error for PAGE_SIZE >= 8192.
  * Renamed i40e_try_flip_rx_page to i40e_can_reuse_rx_page, which is
    more in line to the other Intel Ethernet drivers (igb/fm10k).
  * Validate xdp_adjust_head support in ndo_xdp/XDP_SETUP_PROG.


Björn


Björn Töpel (4):
  i40e: Sync DMA region prior skbuff allocation
  i40e: Initial support for XDP
  i40e: Add XDP_TX support
  i40e: Validate xdp_adjust_head support

 drivers/net/ethernet/intel/i40e/i40e.h         |  18 ++
 drivers/net/ethernet/intel/i40e/i40e_ethtool.c |   4 +
 drivers/net/ethernet/intel/i40e/i40e_main.c    | 380 ++++++++++++++++++++----
 drivers/net/ethernet/intel/i40e/i40e_txrx.c    | 383 ++++++++++++++++++++++---
 drivers/net/ethernet/intel/i40e/i40e_txrx.h    |   7 +
 5 files changed, 703 insertions(+), 89 deletions(-)

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2.9.3