a318c70ad1
This patch adds a partial support for the XDP_REDIRECT directive which instructs the driver to pass the packet to an interface specified by the program. The directive is passed to the driver by calling bpf_redirect() or bpf_redirect_map() functions from the eBPF program. To lay the ground for integration with the existing XDP TX implementation the patch removes the redundant page ref count increase in ena_xdp_xmit_frame() and then decrease in ena_clean_rx_irq(). Instead it only DMA unmaps descriptors for which XDP TX or REDIRECT directive was received. The XDP Redirect support is still missing .ndo_xdp_xmit function implementation, which allows to redirect packet to an ENA interface, which would be added in a later patch. Signed-off-by: Shay Agroskin <shayagr@amazon.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>