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Ido Schimmel says: ==================== mlxsw: Line cards status tracking When a line card is provisioned, netdevs corresponding to the ports found on the line card are registered. User space can then perform various logical configurations (e.g., splitting, setting MTU) on these netdevs. However, since the line card is not present / powered on (i.e., it is not in 'active' state), user space cannot access the various components found on the line card. For example, user space cannot read the temperature of gearboxes or transceiver modules found on the line card via hwmon / thermal. Similarly, it cannot dump the EEPROM contents of these transceiver modules. The above is only possible when the line card becomes active. This patchset solves the problem by tracking the status of each line card and invoking callbacks from interested parties when a line card becomes active / inactive. Patchset overview: Patch #1 adds the infrastructure in the line cards core that allows users to registers a set of callbacks that are invoked when a line card becomes active / inactive. To avoid races, if a line card is already active during registration, the got_active() callback is invoked. Patches #2-#3 are preparations. Patch #4 changes the port module core to register a set of callbacks with the line cards core. See detailed description with examples in the commit message. Patches #5-#6 do the same with regards to thermal / hwmon support, so that user space will be able to monitor the temperature of various components on the line card when it becomes active. ==================== 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.