summaryrefslogtreecommitdiffstats
path: root/drivers/pci/setup-bus.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/pci/setup-bus.c')
-rw-r--r--drivers/pci/setup-bus.c34
1 files changed, 22 insertions, 12 deletions
diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index f2461bf9243d..bbcef1a053ab 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -846,7 +846,7 @@ static resource_size_t window_alignment(struct pci_bus *bus, unsigned long type)
* Per spec, I/O windows are 4K-aligned, but some bridges have
* an extension to support 1K alignment.
*/
- if (bus->self->io_window_1k)
+ if (bus->self && bus->self->io_window_1k)
align = PCI_P2P_DEFAULT_IO_ALIGN_1K;
else
align = PCI_P2P_DEFAULT_IO_ALIGN;
@@ -920,7 +920,7 @@ static void pbus_size_io(struct pci_bus *bus, resource_size_t min_size,
calculate_iosize(size, min_size, size1, add_size, children_add_size,
resource_size(b_res), min_align);
if (!size0 && !size1) {
- if (b_res->start || b_res->end)
+ if (bus->self && (b_res->start || b_res->end))
pci_info(bus->self, "disabling bridge window %pR to %pR (unused)\n",
b_res, &bus->busn_res);
b_res->flags = 0;
@@ -930,7 +930,7 @@ static void pbus_size_io(struct pci_bus *bus, resource_size_t min_size,
b_res->start = min_align;
b_res->end = b_res->start + size0 - 1;
b_res->flags |= IORESOURCE_STARTALIGN;
- if (size1 > size0 && realloc_head) {
+ if (bus->self && size1 > size0 && realloc_head) {
add_to_list(realloc_head, bus->self, b_res, size1-size0,
min_align);
pci_info(bus->self, "bridge window %pR to %pR add_size %llx\n",
@@ -1073,7 +1073,7 @@ static int pbus_size_mem(struct pci_bus *bus, unsigned long mask,
calculate_memsize(size, min_size, add_size, children_add_size,
resource_size(b_res), add_align);
if (!size0 && !size1) {
- if (b_res->start || b_res->end)
+ if (bus->self && (b_res->start || b_res->end))
pci_info(bus->self, "disabling bridge window %pR to %pR (unused)\n",
b_res, &bus->busn_res);
b_res->flags = 0;
@@ -1082,7 +1082,7 @@ static int pbus_size_mem(struct pci_bus *bus, unsigned long mask,
b_res->start = min_align;
b_res->end = size0 + min_align - 1;
b_res->flags |= IORESOURCE_STARTALIGN;
- if (size1 > size0 && realloc_head) {
+ if (bus->self && size1 > size0 && realloc_head) {
add_to_list(realloc_head, bus->self, b_res, size1-size0, add_align);
pci_info(bus->self, "bridge window %pR to %pR add_size %llx add_align %llx\n",
b_res, &bus->busn_res,
@@ -1196,8 +1196,9 @@ void __pci_bus_size_bridges(struct pci_bus *bus, struct list_head *realloc_head)
unsigned long mask, prefmask, type2 = 0, type3 = 0;
resource_size_t additional_io_size = 0, additional_mmio_size = 0,
additional_mmio_pref_size = 0;
- struct resource *b_res;
- int ret;
+ struct resource *pref;
+ struct pci_host_bridge *host;
+ int hdr_type, i, ret;
list_for_each_entry(dev, &bus->devices, bus_list) {
struct pci_bus *b = dev->subordinate;
@@ -1217,10 +1218,20 @@ void __pci_bus_size_bridges(struct pci_bus *bus, struct list_head *realloc_head)
}
/* The root bus? */
- if (pci_is_root_bus(bus))
- return;
+ if (pci_is_root_bus(bus)) {
+ host = to_pci_host_bridge(bus->bridge);
+ if (!host->size_windows)
+ return;
+ pci_bus_for_each_resource(bus, pref, i)
+ if (pref && (pref->flags & IORESOURCE_PREFETCH))
+ break;
+ hdr_type = -1; /* Intentionally invalid - not a PCI device. */
+ } else {
+ pref = &bus->self->resource[PCI_BRIDGE_RESOURCES + 2];
+ hdr_type = bus->self->hdr_type;
+ }
- switch (bus->self->hdr_type) {
+ switch (hdr_type) {
case PCI_HEADER_TYPE_CARDBUS:
/* Don't size CardBuses yet */
break;
@@ -1242,10 +1253,9 @@ void __pci_bus_size_bridges(struct pci_bus *bus, struct list_head *realloc_head)
* the size required to put all 64-bit prefetchable
* resources in it.
*/
- b_res = &bus->self->resource[PCI_BRIDGE_RESOURCES];
mask = IORESOURCE_MEM;
prefmask = IORESOURCE_MEM | IORESOURCE_PREFETCH;
- if (b_res[2].flags & IORESOURCE_MEM_64) {
+ if (pref && (pref->flags & IORESOURCE_MEM_64)) {
prefmask |= IORESOURCE_MEM_64;
ret = pbus_size_mem(bus, prefmask, prefmask,
prefmask, prefmask,