[PATCH 0/8] wifi: ath12k: Introduce device group abstraction
Kalle Valo
kvalo at kernel.org
Tue Apr 23 02:39:07 PDT 2024
Harshitha Prem <quic_hprem at quicinc.com> writes:
> To support multi-link operation, multiple devices with different bands say
> 2 GHz or 5 GHz or 6 GHz can be combined together as a group and provide
> an abstraction to mac80211.
>
> Device group abstraction - when there are multiple devices that are
> connected by any means of communication interface between them, then these
> devices can be combined together as a single group using a group id to form
> a group abstraction. In ath12k driver, this abstraction would be named as
> ath12k_hw_group (ag).
>
> Please find below illustration of device group abstraction with two
> devices.
>
> Grouping of multiple devices (in future)
> +------------------------------------------------------------------------+
> | +-------------------------------------+ +-------------------+ |
> | | +-----------+ | | +-----------+ | | +-----------+ | |
> | | | ar (2GHz) | | | | ar (5GHz) | | | | ar (6GHz) | | |
> | | +-----------+ | | +-----------+ | | +-----------+ | |
> | | ath12k_base (ab) | | ath12k_base (ab) | |
> | | (Dual band device) | | | |
> | +-------------------------------------+ +-------------------+ |
> | ath12k_hw_group (ag) based on group id |
> +------------------------------------------------------------------------+
>
> Say for example, device 1 has two radios (2 GHz and 5 GHz band) and
> device 2 has one radio (6 GHz).
>
> In existing code -
> device 1 will have two hardware abstractions hw1 (2 GHz) and hw2
> (5 GHz) will be registered separately to mac80211 as phy0 and phy1
> respectively. Similarly, device 2 will register its hw (6GHz) as
> phy2 to mac80211.
>
> In future, with multi-link abstraction
>
> combination 1 - Different group id for device1 and device 2
> Device 1 will create a single hardware abstraction hw1
> (2 GHz and 5 GHz) and will be registered to mac80211 as
> phy0. similarly, device 2 will register its hardware
> (6 GHz) to mac80211 as phy1.
>
> combination 2 - Same group id for device1 and device 2
> Both device details are combined together as a group, say
> group1, with single hardware abstraction of radios 2 GHz,
> 5 GHz and 6 GHz band details and will be registered to
> mac80211 as phy0.
>
> Add base infrastructure changes to add device grouping abstraction with
> a single device.
>
> This patch series brings the base code changes with following order:
> 1. Refactor existing code which would facilitate in introducing
> device group abstraction.
> 2. Create a device group abstraction during device probe.
> 3. Start the device group only after QMI firmware ready event is
> received for all the devices that are combined in the group.
> 4. Move the hardware abstractions (ath12k_hw - ah) from device
> (ath12k_base - ab) to device group abstraction (ag) as it would
> ease in having different combinations of group abstraction that
> can be registered to mac80211.
>
>
> Depends-on:
> [PATCH 0/3] wifi: ath12k: Refactor the hardware recovery
> procedures
Are you referring to this patchset:
https://patchwork.kernel.org/project/linux-wireless/list/?series=821155&state=*&order=date
That was sent three months ago and at least I couldn't find a newer
version. So I'll just drop this patchset for now without even looking at
it.
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