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Depending on the device configuration, the ice hardware may share the PTP hardware clock timer between multiple PFs. Each PF is informed by firmware during initialization of the PTP timer association. When bringing up PTP, only the PFs which own the timer shall allocate a PTP hardware clock. Other PFs associated with that timer must report the correct PTP clock index in order to allow userspace software the ability to know which ports are connected to the same clock. To support this, the firmware has driver shared parameters. These parameters enable one PF to write the clock index into firmware, and have other PFs read the associated value out. This enables the driver to have only a single PF allocate and control the device timer registers, while other PFs associated with that timer can report the correct clock in the ETHTOOL_GET_TS_INFO report. Add support for the necessary admin queue commands to enable reading and writing of the driver shared parameters. This will be used in a future change to enable sharing the PTP clock index between PF drivers. Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Tony Brelinski <tonyx.brelinski@intel.com> Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com> |
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| kernel | ||
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| .clang-format | ||
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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.