Lines Matching +full:fixed +full:- +full:layout

1 .. SPDX-License-Identifier: GPL-2.0
8 via :doc:`af_xdp`. Refer to :doc:`xdp-rx-metadata` on how to access similar
16 every socket that shares the same umem. The metadata layout is a fixed UAPI,
22 ``xdp_desc->addr`` in the umem frame. Within a frame, the metadata
23 layout is as follows::
27     +-----------------+---------+----------------------------+
29     +-----------------+---------+----------------------------+
32                           xdp_desc->addr
36 use ``xdp_desc->addr - tx_metadata_len`` to locate
43 - ``XDP_TXMD_FLAGS_TIMESTAMP``: requests the device to put transmission
45 - ``XDP_TXMD_FLAGS_CHECKSUM``: requests the device to calculate L4
52 bit in the ``options`` field. Also note that in a multi-buffer packet
68 Refer to ``xsk-flags`` features bitmask in
71 - ``tx-timestamp``: device supports ``XDP_TXMD_FLAGS_TIMESTAMP``
72 - ``tx-checksum``: device supports ``XDP_TXMD_FLAGS_CHECKSUM``
81 for a more bare-bones example.