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| author |   Yinghai Lu <yinghai@kernel.org> | 2015-10-20 11:36:53 -0500 |
|---|---|---|
| committer |   Bjorn Helgaas <bhelgaas@google.com> | 2015-10-29 17:35:46 -0500 |
| commit | af86fa4001ca5644ae20cc2c52cdf67bb7db9752 (patch) | |
| tree | 54e20db34eb04b1561900c8b4325408f24a02b62 /arch/sparc/kernel/pci_impl.h | |
| parent | PCI: Expand Enhanced Allocation BAR output (diff) | |
| download | wireguard-linux-af86fa4001ca5644ae20cc2c52cdf67bb7db9752.tar.xz wireguard-linux-af86fa4001ca5644ae20cc2c52cdf67bb7db9752.zip | |
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_impl.h')
| -rw-r--r-- | arch/sparc/kernel/pci_impl.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/sparc/kernel/pci_impl.h b/arch/sparc/kernel/pci_impl.h index 75803c780af3..37222ca849df 100644 --- a/arch/sparc/kernel/pci_impl.h +++ b/arch/sparc/kernel/pci_impl.h @@ -97,6 +97,7 @@ struct pci_pbm_info { /* PBM I/O and Memory space resources. */ struct resource io_space; struct resource mem_space; + struct resource mem64_space; struct resource busn; /* Base of PCI Config space, can be per-PBM or shared. */ |