On 10/08/15 16:30, Chuck Tuffli wrote:
> As part of trying to understand a hardware issue, I'm trying to track
> down the kernel code which prints:
>
> [ 1077.119096] pcieport 0000:00:02.0: PCI bridge to [bus 02-02]
> [ 1077.119098] pcieport 0000:00:02.0: bridge window [io disabled]
> [ 1077.119101] pcieport 0000:00:02.0: bridge window [mem disabled]
> [ 1077.119104] pcieport 0000:00:02.0: bridge window [mem pref disabled]
>
> to the system log / dmesg. Grep'ing the kernel source for strings such
> as "PCI bridge to" or "bridge window" hasn't turned up any candidates.
> Can someone point me in the right direction? TIA.
drivers/pci/setup-bus.c: (I'm looking in 4.3-rc4):
static void __pci_setup_bridge(struct pci_bus *bus, unsigned long type)
{
struct pci_dev *bridge = bus->self;
dev_info(&bridge->dev, "PCI bridge to %pR\n",
&bus->busn_res);
if (type & IORESOURCE_IO)
pci_setup_bridge_io(bridge);
if (type & IORESOURCE_MEM)
pci_setup_bridge_mmio(bridge);
if (type & IORESOURCE_PREFETCH)
pci_setup_bridge_mmio_pref(bridge);
pci_write_config_word(bridge, PCI_BRIDGE_CONTROL, bus->bridge_ctl);
}
Each of the calls to pci_setup_bridge_{io,mmio,mmio_pref}() prints a "bridge window"
line.
--
~Randy
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