On Thu, 2015-10-08 at 14:38 -0700, Yinghai Lu wrote:
> Found "no compatible bridge window" warning in boot log from T5-8.
>
> pci 0000:00:01.0: can't claim BAR 15 [mem 0x100000000-0x4afffffff pref]: no compatible bridge window
>
> That resource is above 4G, but does not get offset correctly as
> root bus only report io and mem32.
>
> 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 [bus 00-77]
>
> Add mem64 handling in pci_common for sparc, so we can have 64bit resource
> registered for root bus at first.
>
> After patch, will have:
> 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_bus 0000:00: root bus resource [bus 00-77]
>
> -v2: mem64_space should use mem_space.start as offset.
> -v3: add IORESOURCE_MEM_64 flag
> -v4: set name for mem64_space, otherwise /proc/iomem will have <bad> for name
>
> Fixes: commit d63e2e1f3df9 ("sparc/PCI: Clip bridge windows to fit in upstream windows")
> Link: http://lkml.kernel.org/r/CAE9FiQU1gJY1LYrxs+ma5LCTEEe4xmtjRG0aXJ9K_Tsu+m9Wuw@xxxxxxxxxxxxxx
> Reported-by: David Ahern <david.ahern@xxxxxxxxxx>
> Tested-by: David Ahern <david.ahern@xxxxxxxxxx>
> Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx>
Tested on sparc platforms
Tested-by: Khalid Aziz <khalid.aziz@xxxxxxxxxx>
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