Commit ebf3a650 authored by Michael Ellerman's avatar Michael Ellerman Committed by Paul Mackerras

[POWERPC] Hide resources on Axon PCIE root complex nodes

The PCI bridge representing the PCIE root complex on Axon, contains
device BARs for a memory range and ROM that define inbound accesses.
This confuses the kernel resource management code -- the resources
need to be hidden when Axon is a host bridge.
Signed-off-by: default avatarMichael Ellerman <michael@ellerman.id.au>
Acked-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent 3a4295d1
......@@ -81,6 +81,42 @@ static void cell_progress(char *s, unsigned short hex)
printk("*** %04x : %s\n", hex, s ? s : "");
}
static void cell_fixup_pcie_rootcomplex(struct pci_dev *dev)
{
struct pci_controller *hose;
const char *s;
int i;
if (!machine_is(cell))
return;
/* We're searching for a direct child of the PHB */
if (dev->bus->self != NULL || dev->devfn != 0)
return;
hose = pci_bus_to_host(dev->bus);
if (hose == NULL)
return;
/* Only on PCIE */
if (!of_device_is_compatible(hose->dn, "pciex"))
return;
/* And only on axon */
s = of_get_property(hose->dn, "model", NULL);
if (!s || strcmp(s, "Axon") != 0)
return;
for (i = 0; i < PCI_BRIDGE_RESOURCES; i++) {
dev->resource[i].start = dev->resource[i].end = 0;
dev->resource[i].flags = 0;
}
printk(KERN_DEBUG "PCI: Hiding resources on Axon PCIE RC %s\n",
pci_name(dev));
}
DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, cell_fixup_pcie_rootcomplex);
static int __init cell_publish_devices(void)
{
int node;
......
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