Re: [PATCH v3 4/5] PCI: dwc: Expose endpoint DMA resources

[sashiko-bot@kernel.org]

> Expose the DesignWare endpoint-integrated eDMA register window, logical
> DMA channels, and linked-list descriptor memories through the EPC
> auxiliary resource API. This lets endpoint functions decide which
> channels to publish to the host.
> 
> When the DMA register window is already visible through a reserved BAR
> region, report its BAR and offset. Otherwise report it as a normal
> physical resource so an endpoint function can map it. DMA channel
> resources carry hardware channel selectors and refer to linked-list
> descriptor memory by ID.
> 
> Expose DMA resources only after the local DW eDMA provider has been
> registered, and only expose channels whose linked-list descriptor memory
> is available. DWC non-LL exposure needs a metadata ABI and host parser
> extension, so leave it unsupported for now. Reject VF auxiliary resource
> queries because the RC-programmable DWC eDMA/HDMA register window is
> assigned to a PF BAR only.
> 
> Signed-off-by: Koichiro Den <den@valinux.co.jp>

Sashiko has reviewed this patch and found no issues. It looks great!

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Sashiko AI review · https://sashiko.dev/#/patchset/20260620170438.3756593-1-den@valinux.co.jp?part=4