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1a4c53cf35
In IEEE 1394 bus, the type of asynchronous packet without any offset to node address space is called as phy packet. The destination of packet is IEEE 1394 phy itself. This type of packet is used for several purposes, mainly for selfID at the state of bus reset, to force selection of root node, and to adjust gap count. This commit adds tracepoints events for the type of asynchronous outbound packet. Like asynchronous outbound transaction packets, a pair of events are added to trace initiation and completion of transmission. In the case that the phy packet is sent by kernel API, the match between the initiation and completion is not so easy, since the data of 'struct fw_packet' is allocated statically. In the case that it is sent by userspace applications via cdev, the match is easy, since the data is allocated per each. This example is for Remote Access Packet by lsfirewirephy command in linux-firewire-utils: async_phy_outbound_initiate: \ packet=0xffff89fb34e42e78 generation=1 first_quadlet=0x00148200 \ second_quadlet=0xffeb7dff async_phy_outbound_complete: \ packet=0xffff89fb34e42e78 generation=1 status=1 timestamp=0x0619 Link: https://lore.kernel.org/r/20240430001404.734657-2-o-takashi@sakamocchi.jp Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> |
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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 reStructuredText 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.