gve: Add Rx HWTS metadata to AF_XDP ZC mode

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By overlaying the struct gve_xdp_buff on top of the struct xdp_buff_xsk
that AF_XDP utilizes, the driver records the 32 bit timestamp via the
completion descriptor and the cached 64 bit NIC timestamp via gve_priv.

The driver's implementation of xmo_rx_timestamp extends the timestamp to
the full and up to date 64 bit timestamp and returns it to the user.

gve_rx_xsk_dqo is modified to accept a pointer to the completion
descriptor and no longer takes a buf_len explicitly as it can be pulled
out of the descriptor.

With this patch gve now supports bpf_xdp_metadata_rx_timestamp.

Signed-off-by: Tim Hostetler <thostet@google.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Reviewed-by: Harshitha Ramamurthy <hramamurthy@google.com>
Signed-off-by: Joshua Washington <joshwash@google.com>
Link: https://patch.msgid.link/20251114211146.292068-5-joshwash@google.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

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This commit is contained in:

Tim Hostetler 2025-11-14 13:11:46 -08:00 • committed by Paolo Abeni

parent 66adaf1021

commit 1b42e07af1

2 changed files with 21 additions and 2 deletions

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7

drivers/net/ethernet/google/gve/gve_main.c

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16

drivers/net/ethernet/google/gve/gve_rx_dqo.c

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