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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
Download Patch File Download Diff File Expand all files Collapse all files

60
drivers/pci/setup-res.c
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@@ -51,12 +51,6 @@ void pci_update_resource(struct pci_dev *dev, int resno)
pcibios_resource_to_bus(dev, &region, res);
dev_dbg(&dev->dev, "BAR %d: got res %pR bus [%#llx-%#llx] "
"flags %#lx\n", resno, res,
(unsigned long long)region.start,
(unsigned long long)region.end,
(unsigned long)res->flags);
new = region.start | (res->flags & PCI_REGION_FLAG_MASK);
if (res->flags & IORESOURCE_IO)
mask = (u32)PCI_BASE_ADDRESS_IO_MASK;
@@ -91,9 +85,9 @@ void pci_update_resource(struct pci_dev *dev, int resno)
}
}
res->flags &= ~IORESOURCE_UNSET;
dev_dbg(&dev->dev, "BAR %d: moved to %pR (bus addr [%#llx-%#llx])\n",
resno, res, (unsigned long long)region.start,
(unsigned long long)region.end);
dev_info(&dev->dev, "BAR %d: set to %pR (PCI address [%#llx-%#llx]\n",
resno, res, (unsigned long long)region.start,
(unsigned long long)region.end);
}
int pci_claim_resource(struct pci_dev *dev, int resource)
@@ -103,20 +97,17 @@ int pci_claim_resource(struct pci_dev *dev, int resource)
int err;
root = pci_find_parent_resource(dev, res);
err = -EINVAL;
if (root != NULL)
err = request_resource(root, res);
if (err) {
const char *dtype = resource < PCI_BRIDGE_RESOURCES ? "device" : "bridge";
dev_err(&dev->dev, "BAR %d: %s of %s %pR\n",
resource,
root ? "address space collision on" :
"no parent found for",
dtype, res);
if (!root) {
dev_err(&dev->dev, "no compatible bridge window for %pR\n",
res);
return -EINVAL;
}
err = request_resource(root, res);
if (err)
dev_err(&dev->dev,
"address space collision: %pR already in use\n", res);
return err;
}
EXPORT_SYMBOL(pci_claim_resource);
@@ -124,7 +115,7 @@ EXPORT_SYMBOL(pci_claim_resource);
#ifdef CONFIG_PCI_QUIRKS
void pci_disable_bridge_window(struct pci_dev *dev)
{
dev_dbg(&dev->dev, "Disabling bridge window.\n");
dev_info(&dev->dev, "disabling bridge mem windows\n");
/* MMIO Base/Limit */
pci_write_config_dword(dev, PCI_MEMORY_BASE, 0x0000fff0);
@@ -165,6 +156,7 @@ static int __pci_assign_resource(struct pci_bus *bus, struct pci_dev *dev,
if (!ret) {
res->flags &= ~IORESOURCE_STARTALIGN;
dev_info(&dev->dev, "BAR %d: assigned %pR\n", resno, res);
if (resno < PCI_BRIDGE_RESOURCES)
pci_update_resource(dev, resno);
}
@@ -178,10 +170,11 @@ int pci_assign_resource(struct pci_dev *dev, int resno)
resource_size_t align;
struct pci_bus *bus;
int ret;
char *type;
align = pci_resource_alignment(dev, res);
if (!align) {
dev_info(&dev->dev, "BAR %d: can't allocate %pR "
dev_info(&dev->dev, "BAR %d: can't assign %pR "
"(bogus alignment)\n", resno, res);
return -EINVAL;
}
@@ -197,9 +190,20 @@ int pci_assign_resource(struct pci_dev *dev, int resno)
break;
}
if (ret)
dev_info(&dev->dev, "BAR %d: can't allocate %pR\n",
resno, res);
if (ret) {
if (res->flags & IORESOURCE_MEM)
if (res->flags & IORESOURCE_PREFETCH)
type = "mem pref";
else
type = "mem";
else if (res->flags & IORESOURCE_IO)
type = "io";
else
type = "unknown";
dev_info(&dev->dev,
"BAR %d: can't assign %s (size %#llx)\n",
resno, type, (unsigned long long) resource_size(res));
}
return ret;
}
@@ -272,8 +276,8 @@ int pci_enable_resources(struct pci_dev *dev, int mask)
continue;
if (!r->parent) {
dev_err(&dev->dev, "device not available because of "
"BAR %d %pR collisions\n", i, r);
dev_err(&dev->dev, "device not available "
"(can't reserve %pR)\n", r);
return -EINVAL;
}