Hello,
On Wed, 28 Nov 2018 07:48:09 -0500 (EST)
Mouse wrote:
> >> This reminds me - how does a driver know if any kind of MSI support
> >> is even available?
> > it shouldn't need to.
>
> Okay, then I'm missing something. I've seen hardware where enabling
> MSI is something
Jared McNeill wrote:
>On Wed, 28 Nov 2018, Jaromír Doleček wrote:
>
>> pci_intr_alloc() checks what the device claims to support down the
>> call stack, reading the PCI config space. I assume there some
>> negotiation between the PCI bus and the device. I hope device can't
>> claim to support
>> This reminds me - how does a driver know if any kind of MSI support
>> is even available?
> it shouldn't need to.
Okay, then I'm missing something. I've seen hardware where enabling
MSI is something device-specific (a value in a register, typically),
meaning _something_ MD, presumably the
On Wed, 28 Nov 2018, Jaromír Doleček wrote:
pci_intr_alloc() checks what the device claims to support down the
call stack, reading the PCI config space. I assume there some
negotiation between the PCI bus and the device. I hope device can't
claim to support e.g. MSI-X if the bus doesn't.
