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There is a maximum TX burst size that the ENA device can handle. It is exposed by the device to the driver and the driver needs to comply with it to avoid bugs. In this commit we: 1. Add ena_com_is_doorbell_needed(), which calculates the number of llq entries that will be used to hold a packet, and will return true if they exceed the number of allowed entries in a burst. If the function returns true, a doorbell needs to be invoked to send this packet in the next burst. 2. Follow the available entries in the current burst: - Every doorbell a new burst begins - With each write of an llq entry, the available entries in the current burst are decreased by 1. Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com> Signed-off-by: Sameeh Jubran <sameehj@amazon.com> Signed-off-by: David S. Miller <davem@davemloft.net> |
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README |
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.