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@xxxxxx>
---
arch/x86/pci/i386.c | 9 +++++--
drivers/pci/pci.c | 2 +-
drivers/pci/probe.c | 13 +++++++---
drivers/pci/setup-bus.c | 21 ++++++++++++----
drivers/pci/setup-res.c | 60 +++++++++++++++++++++++++----------------------
5 files changed, 63 insertions(+), 42 deletions(-)
diff --git a/arch/x86/pci/i386.c b/arch/x86/pci/i386.c
index f5fac0f..10e2c8b 100644
--- a/arch/x86/pci/i386.c
+++ b/arch/x86/pci/i386.c
@@ -129,7 +129,9 @@ static void __init pcibios_allocate_bus_resources(struct list_head *bus_list)
continue;
if (!r->start ||
pci_claim_resource(dev, idx) < 0) {
- dev_info(&dev->dev, "BAR %d: can't allocate %pR\n", idx, r);
+ dev_info(&dev->dev,
+ "can't reserve window %pR\n",
+ r);
/*
* Something is wrong with the region.
* Invalidate the resource to prevent
@@ -165,10 +167,11 @@ static void __init pcibios_allocate_resources(int pass)
disabled = !(command & PCI_COMMAND_MEMORY);
if (pass == disabled) {
dev_dbg(&dev->dev,
- "BAR %d: claiming %pr (d=%d, p=%d)\n",
+ "BAR %d: reserving %pr (d=%d, p=%d)\n",
idx, r, disabled, pass);
if (pci_claim_resource(dev, idx) < 0) {
- dev_info(&dev->dev, "BAR %d: can't claim %pR\n", idx, r);
+ dev_info(&dev->dev,
+ "can't reserve %pR\n", r);
/* We'll assign a new address later */
r->end -= r->start;
r->start = 0;
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index b4c62a6..c3cd7f4 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -2539,7 +2539,7 @@ int pci_resource_bar(struct pci_dev *dev, int resno, enum pci_bar_type *type)
return reg;
}
- dev_err(&dev->dev, "BAR: invalid resource #%d\n", resno);
+ dev_err(&dev->dev, "BAR %d: invalid resource\n", resno);
return 0;
}
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 964fac4..5c4ce1b 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -223,7 +223,8 @@ 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;
}
@@ -291,8 +292,11 @@ 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];
}
@@ -642,13 +646,14 @@ 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;
diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index ed6916b..502d170 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -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, ®ion, 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;
}
diff --git a/drivers/pci/setup-res.c b/drivers/pci/setup-res.c
index a00ae3b..7d678bb 100644
--- a/drivers/pci/setup-res.c
+++ b/drivers/pci/setup-res.c
@@ -51,12 +51,6 @@ void pci_update_resource(struct pci_dev *dev, int resno)
pcibios_resource_to_bus(dev, ®ion, 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 (PCI address [%#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;
}
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