ab32f56a41
This patch adds the routines for transmission of ptp packets. When the ptp pdelay_req packet to be transmitted, it uses the deferred xmit worker to schedule the packets. During irq_setup, interrupt for Sync, Pdelay_req and Pdelay_rsp are enabled. So interrupt is triggered for all three packets. But for p2p1step, we require only time stamp of Pdelay_req packet. Hence to avoid posting of the completion from ISR routine for Sync and Pdelay_resp packets, ts_en flag is introduced. This controls which packets need to processed for timestamp. After the packet is transmitted, ISR is triggered. The time at which packet transmitted is recorded to separate register. This value is reconstructed to absolute time and posted to the user application through socket error queue. Signed-off-by: Christian Eggers <ceggers@arri.de> Co-developed-by: Arun Ramadoss <arun.ramadoss@microchip.com> Signed-off-by: Arun Ramadoss <arun.ramadoss@microchip.com> Reviewed-by: Vladimir Oltean <olteanv@gmail.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 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.