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When host PF changes the number of VFs, the ECPF esw driver will get a FW event. It should query the number of VFs enabled by host PF and update the VF reps accordingly. Note that host PF can't change the number of VFs dynamically, it has to reset the number of VFs to 0 before changing to a new positive number. The host event is registered when driver is moving to switchdev mode, and it's the last step to do in esw_offloads_init. It's unregistered and the work queue is flushed when driver quits from switchdev mode. In this way, the host event and devlink command are serialized. When driver is enabling switchdev mode, pay attention to the following two facts: 1. Host PF must not have VF initialized as the flow table in ECPF has ENCAP enabled as default. Such flow table can't be created with existing initialized VFs. 2. ECPF doesn't know how many VFs the host PF will enable, ECPF offloads flow steering shall create the flow table/groups based on the max number of VFs possibly supported by host PF. Signed-off-by: Bodong Wang <bodong@mellanox.com> Reviewed-by: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com> |
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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.