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PCI: improve discovery/configuration messages

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This makes PCI resource management messages more consistent and adds a few
new messages to aid debugging.

Whenever we assign resources to a device, update a BAR, or change a
bridge aperture, it's worth noting it.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Bjorn Helgaas
2009-11-04 10:32:57 -07:00
committed by Jesse Barnes
parent 0207c356ef
commit 865df576e8
5 changed files with 63 additions and 42 deletions
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21
drivers/pci/setup-bus.c
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@@ -74,8 +74,8 @@ void pci_setup_cardbus(struct pci_bus *bus)
struct resource *res;
struct pci_bus_region region;
dev_info(&bridge->dev, "CardBus bridge, secondary bus %04x:%02x\n",
pci_domain_nr(bus), bus->number);
dev_info(&bridge->dev, "CardBus bridge to [bus %02x-%02x]\n",
bus->secondary, bus->subordinate);
res = bus->resource[0];
pcibios_resource_to_bus(bridge, &region, res);
@@ -145,8 +145,8 @@ static void pci_setup_bridge(struct pci_bus *bus)
if (pci_is_enabled(bridge))
return;
dev_info(&bridge->dev, "PCI bridge, secondary bus %04x:%02x\n",
pci_domain_nr(bus), bus->number);
dev_info(&bridge->dev, "PCI bridge to [bus %02x-%02x]\n",
bus->secondary, bus->subordinate);
/* Set up the top and bottom of the PCI I/O segment for this bus. */
res = bus->resource[0];
@@ -338,6 +338,10 @@ static void pbus_size_io(struct pci_bus *bus, resource_size_t min_size)
#endif
size = ALIGN(size + size1, 4096);
if (!size) {
if (b_res->start || b_res->end)
dev_info(&bus->self->dev, "disabling bridge window "
"%pR to [bus %02x-%02x] (unused)\n", b_res,
bus->secondary, bus->subordinate);
b_res->flags = 0;
return;
}
@@ -383,8 +387,9 @@ static int pbus_size_mem(struct pci_bus *bus, unsigned long mask,
align = pci_resource_alignment(dev, r);
order = __ffs(align) - 20;
if (order > 11) {
dev_warn(&dev->dev, "BAR %d: bad alignment %llx: "
"%pR\n", i, (unsigned long long)align, r);
dev_warn(&dev->dev, "disabling BAR %d: %pR "
"(bad alignment %#llx)\n", i, r,
(unsigned long long) align);
r->flags = 0;
continue;
}
@@ -418,6 +423,10 @@ static int pbus_size_mem(struct pci_bus *bus, unsigned long mask,
}
size = ALIGN(size, min_align);
if (!size) {
if (b_res->start || b_res->end)
dev_info(&bus->self->dev, "disabling bridge window "
"%pR to [bus %02x-%02x] (unused)\n", b_res,
bus->secondary, bus->subordinate);
b_res->flags = 0;
return 1;
}