322b598be4
FPGA user applications may be interested in interrupts generated by DFL features. For example, users can implement their own FPGA logics with interrupts enabled in AFU (Accelerated Function Unit, dynamic region of DFL based FPGA). So user applications need to be notified to handle these interrupts. In order to allow userspace applications to monitor interrupts, driver requires userspace to provide eventfds as interrupt notification channels. Applications then poll/select on the eventfds to get notified. This patch introduces a generic helper functions to do eventfds binding with given interrupts. Sub feature drivers are expected to use XXX_GET_IRQ_NUM to query irq info, and XXX_SET_IRQ to set eventfds for interrupts. This patch also introduces helper functions for these 2 ioctls. Signed-off-by: Luwei Kang <luwei.kang@intel.com> Signed-off-by: Wu Hao <hao.wu@intel.com> Signed-off-by: Xu Yilun <yilun.xu@intel.com> Signed-off-by: Tom Rix <trix@redhat.com> Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com> Acked-by: Wu Hao <hao.wu@intel.com> Signed-off-by: Moritz Fischer <mdf@kernel.org>
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.