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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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drivers/pci/probe.c
+9 -4
View File
@@ -226,7 +226,8 @@ int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
goto fail;
if ((sizeof(resource_size_t) < 8) && (sz64 > 0x100000000ULL)) {
dev_err(&dev->dev, "can't handle 64-bit BAR\n");
dev_err(&dev->dev, "reg %x: can't handle 64-bit BAR\n",
pos);
goto fail;
}
@@ -294,8 +295,11 @@ void __devinit pci_read_bridge_bases(struct pci_bus *child)
if (pci_is_root_bus(child)) /* It's a host bus, nothing to read */
return;
dev_info(&dev->dev, "PCI bridge to [bus %02x-%02x]%s\n",
child->secondary, child->subordinate,
dev->transparent ? " (subtractive decode)": "");
if (dev->transparent) {
dev_info(&dev->dev, "transparent bridge\n");
for(i = 3; i < PCI_BUS_NUM_RESOURCES; i++)
child->resource[i] = child->parent->resource[i - 3];
}
@@ -645,13 +649,14 @@ int __devinit pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max,
(child->number > bus->subordinate) ||
(child->number < bus->number) ||
(child->subordinate < bus->number)) {
pr_debug("PCI: Bus #%02x (-#%02x) is %s "
"hidden behind%s bridge #%02x (-#%02x)\n",
dev_info(&child->dev, "[bus %02x-%02x] %s "
"hidden behind%s bridge %s [bus %02x-%02x]\n",
child->number, child->subordinate,
(bus->number > child->subordinate &&
bus->subordinate < child->number) ?
"wholly" : "partially",
bus->self->transparent ? " transparent" : "",
dev_name(&bus->dev),
bus->number, bus->subordinate);
}
bus = bus->parent;