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Ioana Ciornei says: ==================== dpaa2-eth: add support for xdp bulk enqueue The first patch moves the DEV_MAP_BULK_SIZE macro into the xdp.h header file so that drivers can take advantage of it and use it. The following 3 patches are there to setup the scene for using the bulk enqueue feature. First of all, the prototype of the enqueue function is changed so that it returns the number of enqueued frames. Second, the bulk enqueue interface is used but without any functional changes, still one frame at a time is enqueued. Third, the .ndo_xdp_xmit callback is split into two stages, create all FDs for the xdp_frames received and then enqueue them. The last patch of the series builds on top of the others and instead of issuing an enqueue operation for each FD it issues a bulk enqueue call for as many frames as possible. This is repeated until all frames are enqueued or the maximum number of retries is hit. We do not use the XDP_XMIT_FLUSH flag since the architecture is not capable to store all frames dequeued in a NAPI cycle, instead we send out right away all frames received in a .ndo_xdp_xmit call. Changes in v2: - statically allocate an array of dpaa2_fd by frame queue - use the DEV_MAP_BULK_SIZE as the maximum number of xdp_frames received in .ndo_xdp_xmit() ==================== Signed-off-by: David S. Miller <davem@davemloft.net> |
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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 Restructured Text 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.