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d92e4e6e33
On Spectrum-1, timestamps arrive through a pair of dedicated events: MLXSW_TRAP_ID_PTP_ING_FIFO and _EGR_FIFO. The payload delivered with those traps is contents of the timestamp FIFO at a given port in a given direction. Add a Spectrum-1-specific handler for these two events which decodes the timestamps and forwards them to the PTP module. Add a function that parses a packet, dispatching to ptp_classify_raw(), and decodes PTP message type, domain number, and sequence ID. Add a new mlxsw dependency on the PTP classifier. Add helpers that can store and retrieve unmatched timestamps and SKBs to the hash table added in a preceding patch. Add the matching code itself: upon arrival of a timestamp or a packet, look up the corresponding unmatched entry, and match it up. If there is none, add a new unmatched entry. This logic is the same on ingress as on egress. Packets and timestamps that never matched need to be eventually disposed of. A garbage collector added in a follow-up patch will take care of that. Since currently all this code is turned off, no crud will accumulate in the hash table. Signed-off-by: Petr Machata <petrm@mellanox.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: Ido Schimmel <idosch@mellanox.com> 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.