On 3. 9. 2024 21:49, Dean Marx wrote:
On Wed, Aug 21, 2024 at 10:53 AM Juraj Linkeš <juraj.lin...@pantheon.tech> wrote:

    The scatter Rx offload capability is needed for the pmd_buffer_scatter
    test suite. The command that retrieves the capability is:
    show port <port_id> rx_offload capabilities

    The command also retrieves a lot of other capabilities (RX_OFFLOAD_*)
    which are all added into a Flag. The Flag members correspond to NIC
    capability names so a convenience function that looks for the supported
    Flags in a testpmd output is also added.

    The NIC capability names (mentioned above) are copy-pasted from the
    Flag. Dynamic addition of Enum members runs into problems with typing
    (mypy doesn't know about the members) and documentation generation
    (Sphinx doesn't know about the members).

    Signed-off-by: Juraj Linkeš <juraj.lin...@pantheon.tech>


<snip>

    +    RX_OFFLOAD_VLAN_FILTER = 1 << 9
    +    #: Device supports VLAN offload.
    +    RX_OFFLOAD_VLAN_EXTEND = auto()
    +    #: Device supports receiving segmented mbufs.
    +    RX_OFFLOAD_SCATTER = 1 << 13


This was an interesting section, I'm not super familiar with bitwise shifting in python flags so I figured I'd ask while it's in mind if there's any specific reason for shifting these two flags? Not a critique of the code, just genuinely curious.


It's there just to mirror the flags in DPDK code.

Reviewed-by: Dean Marx <dm...@iol.unh.edu <mailto:dm...@iol.unh.edu>>

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