On Wed, Mar 05, 2025 at 05:21:20PM +0100, Alexander Lobakin wrote: > Add the following counterparts of functions from libeth_xdp which need > special care on XSk path: > > * building &xdp_buff (head and frags); > * running XDP prog and managing all possible verdicts; > * xmit (with S/G and metadata support); > * wakeup via CSD/IPI; > * FQ init/deinit and refilling. > > Xmit by default unrolls loops by 8 when filling Tx DMA descriptors. > XDP_REDIRECT verdict is considered default/likely(). Rx frags are > considered unlikely(). > It is assumed that Tx/completion queues are not mapped to any > interrupts, thus we clean them only when needed (=> 3/4 of > descriptors is busy) and keep need_wakeup set. > IPI for XSk wakeup showed better performance than triggering an SW > NIC interrupt, though it doesn't respect NIC's interrupt affinity. Maybe introduce this with xsk support on idpf (i suppose when set after this one) ? Otherwise, what is the reason to have this included? I didn't check in-depth if there are any functions used from this patch on drivers side. > > Suggested-by: Maciej Fijalkowski <maciej.fijalkowski@xxxxxxxxx> # lots of stuff > Signed-off-by: Alexander Lobakin <aleksander.lobakin@xxxxxxxxx> > --- > drivers/net/ethernet/intel/libeth/Kconfig | 2 +- > drivers/net/ethernet/intel/libeth/Makefile | 1 + > drivers/net/ethernet/intel/libeth/priv.h | 11 + > include/net/libeth/tx.h | 10 +- > include/net/libeth/xdp.h | 90 ++- > include/net/libeth/xsk.h | 685 +++++++++++++++++++++ > drivers/net/ethernet/intel/libeth/tx.c | 5 +- > drivers/net/ethernet/intel/libeth/xdp.c | 26 +- > drivers/net/ethernet/intel/libeth/xsk.c | 269 ++++++++ > 9 files changed, 1067 insertions(+), 32 deletions(-) > create mode 100644 include/net/libeth/xsk.h > create mode 100644 drivers/net/ethernet/intel/libeth/xsk.c > (...)
