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This patch adds support for XDP_TX and XDP_REDIRECT for the DQ RDA queue format. To appropriately support transmission of XDP frames, a new pending packet type GVE_TX_PENDING_PACKET_DQO_XDP_FRAME is introduced for completion handling, as there was a previous assumption that completed packets would be SKBs. XDP_TX handling completes the basic XDP actions, so the feature is recorded accordingly. This patch also enables the ndo_xdp_xmit callback allowing DQ to handle XDP_REDIRECT packets originating from another interface. The XDP spinlock is moved to common TX ring fields so that it can be used in both GQ and DQ. Originally, it was in a section which was mutually exclusive for GQ and DQ. In summary, 3 XDP features are exposed for the DQ RDA queue format: 1) NETDEV_XDP_ACT_BASIC 2) NETDEV_XDP_ACT_NDO_XMIT 3) NETDEV_XDP_ACT_REDIRECT Note that XDP and header-data split are mutually exclusive for the time being due to lack of multi-buffer XDP support. This patch does not add support for the DQ QPL format. That is to come in a future patch series. Reviewed-by: Willem de Bruijn <willemb@google.com> Signed-off-by: Praveen Kaligineedi <pkaligineedi@google.com> Signed-off-by: Joshua Washington <joshwash@google.com> Signed-off-by: Harshitha Ramamurthy <hramamurthy@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.