Re: [PATCH v2 8/9] PCI: Exclude PCIe ports used for tunneling in pcie_bandwidth_available()

Lukas Wunner
2023-11-06T18:56:54Z

On Mon, Nov 06, 2023 at 12:44:25PM -0600, Mario Limonciello wrote:
> Tangentially related; the link speed is currently symmetric but there are
> two sysfs files. Mika left a comment in drivers/thunderbolt/switch.c it may
> be asymmetric in the future. So we may need to keep that in mind on any
> design that builds on top of them.

Aren't asymmetric Thunderbolt speeds just a DisplayPort thing?

> As 'thunderbolt' can be a module or built in, we need to bring code into PCI
> core so that it works in early boot before it loads.

tb_switch_get_generation() is small enough that it could be moved to the
PCI core. I doubt that we need to make thunderbolt built-in only
or move a large amount of code to the PCI core.

Thanks,

Lukas