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sparc64: Expand PCI bridge probing debug logging.

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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>
This commit is contained in:
David S. Miller 2014-08-12 23:22:39 -07:00
parent f0094b28f3
commit 93a6423bd8
1 changed files with 23 additions and 1 deletions
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24
arch/sparc/kernel/pci.c
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@ -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: