Len Ovens wrote:
Device 00:1c.3 is one of the PCIe ports of the southbridge.
Device 04:00 is the ASM1083 PCIe/PCI bridge.
Devices 05:xx are the chips on the PCI cards.
Bus 00: is the "root complex", i.e., CPU/northbridge/southbridge.
Bus 04: is the PCIe connection between the southbridge and the ASM1083.
Bus 05: is the PCI bus.
"[04-05]" means that both buses are reachable through this bridge.
> So it sounds like you are saying that the PCIe devices are assigned
There are different kinds of interrupts. 0-15 are ISA-compatible
interrupts; the next four or eight can be used for PCI interrupts.
(The interrupt controller (IOAPIC) has only a limited number of
Message-signaled interrupts (MSIs) are implemented with a different
mechanism and do not need to go through the IOAPIC; you can have any
number of them, and they are never shared between devices.
> Looking at /proc/interrupts, I see that ahci (which from lspci seems
Yes, it's an MSI.
> (and why do I have an ISA bridge?)
Because you have ISA devices. (Intel likes to call them "legacy", but
they are still there.)
> I would guess that if I installed a PCIe card that was PCI HW with
Linux-audio-user mailing list