This series addresses a recent AF_XDP zero-copy regression.
In commit f3fef2b6e1cc ("i40e: Remove umem from VSI") a regression was
introduced; When the VSI was reset, the setup code would try to enable
AF_XDP ZC unconditionally (as long as there was a umem placed in the
netdev._rx struct). Here, we add a bitmap to the VSI that tracks if a
certain queue pair has been "zero-copy enabled" via the ndo_bpf. The
bitmap is used in i40e_xsk_umem, and enables zero-copy if and only if
XDP is enabled, the corresponding qid in the bitmap is set and the
umem is non-NULL.
Thanks,
Björn
Björn Töpel (2):
i40e: move i40e_xsk_umem function
i40e: add tracking of AF_XDP ZC state for each queue pair
drivers/net/ethernet/intel/i40e/i40e.h | 16 ++----------
drivers/net/ethernet/intel/i40e/i40e_main.c | 28 +++++++++++++++++++++
drivers/net/ethernet/intel/i40e/i40e_xsk.c | 3 +++
3 files changed, 33 insertions(+), 14 deletions(-)
--
2.19.1
