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0714256c3d
On Spectrum-1, timestamps are delivered separately from the packets, and need to paired up. Therefore, at some point after mlxsw_sp_port_xmit() is invoked, it is necessary to involve the chip-specific driver code to allow it to do the necessary bookkeeping and matching. On Spectrum-2, timestamps are delivered in CQE. For that reason, position the point of driver involvement into mlxsw_pci_cqe_sdq_handle() to make it hopefully easier to extend for Spectrum-2 in the future. To tell the driver what port the packet was sent on, keep tx_info in SKB control buffer. Introduce a new driver core interface mlxsw_core_ptp_transmitted(), a driver callback ptp_transmitted, and a PTP op transmitted. The callee is responsible for taking care of releasing the SKB passed to the new interfaces, and correspondingly have the new stub callbacks just call dev_kfree_skb_any(). Follow-up patches will introduce the actual content into mlxsw_sp1_ptp_transmitted() in particular. 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>
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.