Hi Mark,
Às 3:57 PM de 5/5/2017, Marc Zyngier escreveu:
> Joao,
>
> On 05/05/17 15:11, Joao Pinto wrote:
>> Hello,
>> I am currently adding the support for both MSI and MSI-x in pcie-designware and
>> I am now facing a dificulty.
>>
>> My test endpoint is a USB 3.1 MSI / MSI-X capable and I tested that with
>> the changes introduced by this patch we are able to enable MSI and MSI-X
>> in this endpoint (depends on the usage of the MSI_FLAG_PCI_MSIX flag).
>>
>> The problem I am facing now is that Intc for the USB 3.1 Endpoint is completely
>> bogus (524288) when it should be 1, and so I am not receiving any interrupts
>> from the endpoint.
>
> It is not bogus at all. It is computed from the PCI requester ID in
> pci_msi_domain_calc_hwirq. What you're seeing is the PCI/MDI domain
> view of that interrupt, which is completely virtual.
>
> The real thing happens in your own irqdomain, where the hwirq for IRQ46
> is probably 1 (only you can know that). As for why it doesn't work, see
> below:
>
snip (...)
> static struct irq_chip dw_msi_irq_chip = {
> .name = "PCI-MSI",
> - .irq_enable = pci_msi_unmask_irq,
> - .irq_disable = pci_msi_mask_irq,
> - .irq_mask = pci_msi_mask_irq,
> - .irq_unmask = pci_msi_unmask_irq,
> + .irq_mask = dw_msi_mask_irq,
> + .irq_unmask = dw_msi_unmask_irq,
> };
>
> I haven't dug any further, but this should be fixed first.
>
> Thanks,
>
> M.
>
Thanks for the help! I will check it out!
Joao
