On Fri, Oct 2, 2015 at 1:00 PM, Khalid Aziz <khalid.aziz@xxxxxxxxxx> wrote: > On Wed, 2015-09-30 at 22:52 -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 ... > PCI: Scanning PBM /pci@301 > pci_sun4v f0339c2c: PCI host bridge to bus 0009:00 > pci_bus 0009:00: root bus resource [io 0x2027e40000000-0x2027e4fffffff] (bus address [0x0000-0xfffffff]) > pci_bus 0009:00: root bus resource [mem 0x2024000100000-0x202407effffff] (bus address [0x00000000-0x7eefffff]) > pci_bus 0009:00: root bus resource [mem 0x2024100000000-0x2024dffffffff] (bus address [0xfff00000-0xdffefffff]) Looks like offset for mmio64 is not right. Please check attached patch on the this platform and T5-8. Thanks Yinghai
--- arch/sparc/kernel/pci.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) Index: linux-2.6/arch/sparc/kernel/pci.c =================================================================== --- linux-2.6.orig/arch/sparc/kernel/pci.c +++ linux-2.6/arch/sparc/kernel/pci.c @@ -659,7 +659,7 @@ struct pci_bus *pci_scan_one_pbm(struct pbm->mem_space.start); if (pbm->mem64_space.flags) pci_add_resource_offset(&resources, &pbm->mem64_space, - pbm->mem_space.start); + pbm->mem64_space.start); pbm->busn.start = pbm->pci_first_busno; pbm->busn.end = pbm->pci_last_busno; pbm->busn.flags = IORESOURCE_BUS;
