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powerpc/powernv: Fix PCI resource handling

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Recent changes to the handling of PCI resources for host bridges
are breaking the PowerNV code for assigning resources on IODA.

The root of the problem is that the pci_bus attached to a host
bridge no longer has its "legacy" resource pointers populated
but only uses the newer list instead.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Benjamin Herrenschmidt 2012-01-25 13:31:56 +11:00
parent 897e01a08c
commit f7ea82beb2
1 changed files with 27 additions and 16 deletions
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43
arch/powerpc/platforms/powernv/pci-ioda.c
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@ -204,11 +204,10 @@ static void __devinit pnv_ioda_offset_bus(struct pci_bus *bus,
pr_devel(" -> OBR %s [%x] +%016llx\n",
bus->self ? pci_name(bus->self) : "root", flags, offset);
for (i = 0; i < 2; i++) {
r = bus->resource[i];
pci_bus_for_each_resource(bus, r, i) {
if (r && (r->flags & flags)) {
bus->resource[i]->start += offset;
bus->resource[i]->end += offset;
r->start += offset;
r->end += offset;
}
}
list_for_each_entry(dev, &bus->devices, bus_list)
@ -288,12 +287,17 @@ static void __devinit pnv_ioda_calc_bus(struct pci_bus *bus, unsigned int flags,
* assignment algorithm is going to be uber-trivial for now, we
* can try to be smarter later at filling out holes.
*/
start = bus->self ? 0 : bus->resource[bres]->start;
/* Don't hand out IO 0 */
if ((flags & IORESOURCE_IO) && !bus->self)
start += 0x1000;
if (bus->self) {
/* No offset for downstream bridges */
start = 0;
} else {
/* Offset from the root */
if (flags & IORESOURCE_IO)
/* Don't hand out IO 0 */
start = hose->io_resource.start + 0x1000;
else
start = hose->mem_resources[0].start;
}
while(!list_empty(&head)) {
w = list_first_entry(&head, struct resource_wrap, link);
list_del(&w->link);
@ -321,13 +325,20 @@ static void __devinit pnv_ioda_calc_bus(struct pci_bus *bus, unsigned int flags,
empty:
/* Only setup P2P's, not the PHB itself */
if (bus->self) {
WARN_ON(bus->resource[bres] == NULL);
bus->resource[bres]->start = 0;
bus->resource[bres]->flags = (*size) ? flags : 0;
bus->resource[bres]->end = (*size) ? (*size - 1) : 0;
struct resource *res = bus->resource[bres];
/* Clear prefetch bus resources for now */
bus->resource[2]->flags = 0;
if (WARN_ON(res == NULL))
return;
/*
* FIXME: We should probably export and call
* pci_bridge_check_ranges() to properly re-initialize
* the PCI portion of the flags here, and to detect
* what the bridge actually supports.
*/
res->start = 0;
res->flags = (*size) ? flags : 0;
res->end = (*size) ? (*size - 1) : 0;
}
pr_devel("<- CBR %s [%x] *size=%016llx *align=%016llx\n",