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authorYinghai Lu <yinghai@kernel.org>2015-10-20 11:36:53 -0500
committerBjorn Helgaas <bhelgaas@google.com>2015-10-29 17:35:46 -0500
commitaf86fa4001ca5644ae20cc2c52cdf67bb7db9752 (patch)
tree54e20db34eb04b1561900c8b4325408f24a02b62 /arch/sparc/kernel/pci_common.c
parent597becb4adb7d57b8e9d857a68f764ce96a141b8 (diff)
sparc/PCI: Add mem64 resource parsing for root bus
David reported that a T5-8 sparc system failed to boot with: pci_sun4v f02dbcfc: PCI host bridge to bus 0000:00 pci_bus 0000:00: root bus resource [io 0x804000000000-0x80400fffffff] (bus address [0x0000-0xfffffff]) pci_bus 0000:00: root bus resource [mem 0x800000000000-0x80007effffff] (bus address [0x00000000-0x7effffff]) pci 0000:00:01.0: can't claim BAR 15 [mem 0x100000000-0x4afffffff pref]: no compatible bridge window Note that we don't know about a host bridge aperture that contains BAR 15. OF does report a MEM64 aperture, but before this patch, pci_determine_mem_io_space() ignored it. Add support for host bridge apertures with 64-bit PCI addresses. Also set IORESOURCE_MEM_64 for PCI device and bridge resources in PCI 64-bit memory space. Sparc doesn't actually print the device and bridge resources, but after this patch, we should have the equivalent of this: pci_sun4v f02dbcfc: PCI host bridge to bus 0000:00 pci_bus 0000:00: root bus resource [io 0x804000000000-0x80400fffffff] (bus address [0x0000-0xfffffff]) pci_bus 0000:00: root bus resource [mem 0x800000000000-0x80007effffff] (bus address [0x00000000-0x7effffff]) pci_bus 0000:00: root bus resource [mem 0x800100000000-0x8007ffffffff] (bus address [0x100000000-0x7ffffffff]) pci 0000:00:01.0: bridge window [mem 0x800100000000-0x8004afffffff 64bit pref] [bhelgaas: changelog, URL to David's report] Fixes: d63e2e1f3df9 ("sparc/PCI: Clip bridge windows to fit in upstream windows") Link: http://lkml.kernel.org/r/5514391F.2030300@oracle.com Reported-by: David Ahern <david.ahern@oracle.com> Tested-by: David Ahern <david.ahern@oracle.com> Tested-by: Khalid Aziz <khalid.aziz@oracle.com> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'arch/sparc/kernel/pci_common.c')
-rw-r--r--arch/sparc/kernel/pci_common.c17
1 files changed, 15 insertions, 2 deletions
diff --git a/arch/sparc/kernel/pci_common.c b/arch/sparc/kernel/pci_common.c
index 944a06536ecc..33524c1d5328 100644
--- a/arch/sparc/kernel/pci_common.c
+++ b/arch/sparc/kernel/pci_common.c
@@ -406,6 +406,7 @@ void pci_determine_mem_io_space(struct pci_pbm_info *pbm)
}
num_pbm_ranges = i / sizeof(*pbm_ranges);
+ memset(&pbm->mem64_space, 0, sizeof(struct resource));
for (i = 0; i < num_pbm_ranges; i++) {
const struct linux_prom_pci_ranges *pr = &pbm_ranges[i];
@@ -451,7 +452,12 @@ void pci_determine_mem_io_space(struct pci_pbm_info *pbm)
break;
case 3:
- /* XXX 64-bit MEM handling XXX */
+ /* 64-bit MEM handling */
+ pbm->mem64_space.start = a;
+ pbm->mem64_space.end = a + size - 1UL;
+ pbm->mem64_space.flags = IORESOURCE_MEM;
+ saw_mem = 1;
+ break;
default:
break;
@@ -465,15 +471,22 @@ void pci_determine_mem_io_space(struct pci_pbm_info *pbm)
prom_halt();
}
- printk("%s: PCI IO[%llx] MEM[%llx]\n",
+ printk("%s: PCI IO[%llx] MEM[%llx]",
pbm->name,
pbm->io_space.start,
pbm->mem_space.start);
+ if (pbm->mem64_space.flags)
+ printk(" MEM64[%llx]",
+ pbm->mem64_space.start);
+ printk("\n");
pbm->io_space.name = pbm->mem_space.name = pbm->name;
+ pbm->mem64_space.name = pbm->name;
request_resource(&ioport_resource, &pbm->io_space);
request_resource(&iomem_resource, &pbm->mem_space);
+ if (pbm->mem64_space.flags)
+ request_resource(&iomem_resource, &pbm->mem64_space);
pci_register_legacy_regions(&pbm->io_space,
&pbm->mem_space);