summaryrefslogtreecommitdiffstats
path: root/arch/sparc/kernel
diff options
context:
space:
mode:
authorDavid S. Miller <davem@davemloft.net>2014-08-12 23:22:39 -0700
committerDavid S. Miller <davem@davemloft.net>2014-08-13 21:17:49 -0700
commit93a6423bd84d977bd768a001c6c3868e6a20b63a (patch)
tree5134930d02aaa372ded8a4f78bcd1ceae53dcae6 /arch/sparc/kernel
parentf0094b28f3038936c1985be64dbe83f0e950b671 (diff)
downloadop-kernel-dev-93a6423bd84d977bd768a001c6c3868e6a20b63a.zip
op-kernel-dev-93a6423bd84d977bd768a001c6c3868e6a20b63a.tar.gz
sparc64: Expand PCI bridge probing debug logging.
Dump the various aspects of the PCI bridge probed at boot time, most importantly the bridge number ranges, and the ranges property. This helps diagnose PCI resource issues and other problems by giving ofpci_debug=1 on the boot command line. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/kernel')
-rw-r--r--arch/sparc/kernel/pci.c24
1 files changed, 23 insertions, 1 deletions
diff --git a/arch/sparc/kernel/pci.c b/arch/sparc/kernel/pci.c
index 539babf..da24fb6 100644
--- a/arch/sparc/kernel/pci.c
+++ b/arch/sparc/kernel/pci.c
@@ -432,6 +432,11 @@ static void of_scan_pci_bridge(struct pci_pbm_info *pbm,
node->full_name);
return;
}
+
+ if (ofpci_verbose)
+ printk(" Bridge bus range [%u --> %u]\n",
+ busrange[0], busrange[1]);
+
ranges = of_get_property(node, "ranges", &len);
simba = 0;
if (ranges == NULL) {
@@ -451,6 +456,10 @@ static void of_scan_pci_bridge(struct pci_pbm_info *pbm,
pci_bus_insert_busn_res(bus, busrange[0], busrange[1]);
bus->bridge_ctl = 0;
+ if (ofpci_verbose)
+ printk(" Bridge ranges[%p] simba[%d]\n",
+ ranges, simba);
+
/* parse ranges property, or cook one up by hand for Simba */
/* PCI #address-cells == 3 and #size-cells == 2 always */
res = &dev->resource[PCI_BRIDGE_RESOURCES];
@@ -468,6 +477,14 @@ static void of_scan_pci_bridge(struct pci_pbm_info *pbm,
}
i = 1;
for (; len >= 32; len -= 32, ranges += 8) {
+ u64 start;
+
+ if (ofpci_verbose)
+ printk(" RAW Range[%08x:%08x:%08x:%08x:%08x:%08x:"
+ "%08x:%08x]\n",
+ ranges[0], ranges[1], ranges[2], ranges[3],
+ ranges[4], ranges[5], ranges[6], ranges[7]);
+
flags = pci_parse_of_flags(ranges[0]);
size = GET_64BIT(ranges, 6);
if (flags == 0 || size == 0)
@@ -490,8 +507,13 @@ static void of_scan_pci_bridge(struct pci_pbm_info *pbm,
}
res->flags = flags;
- region.start = GET_64BIT(ranges, 1);
+ region.start = start = GET_64BIT(ranges, 1);
region.end = region.start + size - 1;
+
+ if (ofpci_verbose)
+ printk(" Using flags[%08x] start[%016llx] size[%016llx]\n",
+ flags, start, size);
+
pcibios_bus_to_resource(dev->bus, res, &region);
}
after_ranges:
OpenPOWER on IntegriCloud