> This patch completes the transition of the ice driver to use the Page
> Pool and libeth APIs, following the same direction as commit
> 5fa4caff59f2
> ("iavf: switch to Page Pool"). With the legacy page splitting and
> recycling logic already removed, the driver is now in a clean state to
> adopt the modern memory model.
>
> The Page Pool integration simplifies buffer management by offloading
> DMA mapping and recycling to the core infrastructure. This eliminates
> the need for driver-specific handling of headroom, buffer sizing, and
> page order. The libeth helper is used for CPU-side processing, while
> DMA-for-device is handled by the Page Pool core.
>
> Additionally, this patch extends the conversion to cover XDP support.
> The driver now uses libeth_xdp helpers for Rx buffer processing, and
> optimizes XDP_TX by skipping per-frame DMA mapping. Instead, all
> buffers are mapped as bi-directional up front, leveraging Page Pool's
> lifecycle management. This significantly reduces overhead in
> virtualized environments.
>
> Performance observations:
> - In typical scenarios (netperf, XDP_PASS, XDP_DROP), performance remains
> on par with the previous implementation.
> - In XDP_TX mode:
> * With IOMMU enabled, performance improves dramatically - over 5x
> increase - due to reduced DMA mapping overhead and better memory
> reuse.
> * With IOMMU disabled, performance remains comparable to the
> previous
> implementation, with no significant changes observed.
>
> This change is also a step toward a more modular and unified XDP
> implementation across Intel Ethernet drivers, aligning with ongoing
> efforts to consolidate and streamline feature support.
>
> Suggested-by: Maciej Fijalkowski <[email protected]>
> Suggested-by: Alexander Lobakin <[email protected]>
> Reviewed-by: Alexander Lobakin <[email protected]>
> Signed-off-by: Michal Kubiak <[email protected]>
> ---
> drivers/net/ethernet/intel/Kconfig | 1 +
> drivers/net/ethernet/intel/ice/ice_base.c | 85 ++--
> drivers/net/ethernet/intel/ice/ice_ethtool.c | 17 +-
> drivers/net/ethernet/intel/ice/ice_lib.c | 1 -
> drivers/net/ethernet/intel/ice/ice_main.c | 10 +-
> drivers/net/ethernet/intel/ice/ice_txrx.c | 443 +++---------------
> drivers/net/ethernet/intel/ice/ice_txrx.h | 33 +-
> drivers/net/ethernet/intel/ice/ice_txrx_lib.c | 65 ++-
> drivers/net/ethernet/intel/ice/ice_txrx_lib.h | 9 -
> drivers/net/ethernet/intel/ice/ice_xsk.c | 76 +--
> drivers/net/ethernet/intel/ice/ice_xsk.h | 6 +-
> 11 files changed, 200 insertions(+), 546 deletions(-)
Tested-by: Priya Singh <[email protected]>
