diff options
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 | |
parent | 597becb4adb7d57b8e9d857a68f764ce96a141b8 (diff) | |
download | op-kernel-dev-af86fa4001ca5644ae20cc2c52cdf67bb7db9752.zip op-kernel-dev-af86fa4001ca5644ae20cc2c52cdf67bb7db9752.tar.gz |
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')
-rw-r--r-- | arch/sparc/kernel/pci.c | 7 | ||||
-rw-r--r-- | arch/sparc/kernel/pci_common.c | 17 | ||||
-rw-r--r-- | arch/sparc/kernel/pci_impl.h | 1 |
3 files changed, 22 insertions, 3 deletions
diff --git a/arch/sparc/kernel/pci.c b/arch/sparc/kernel/pci.c index b91d7f1..badf095 100644 --- a/arch/sparc/kernel/pci.c +++ b/arch/sparc/kernel/pci.c @@ -185,8 +185,10 @@ static unsigned long pci_parse_of_flags(u32 addr0) if (addr0 & 0x02000000) { flags = IORESOURCE_MEM | PCI_BASE_ADDRESS_SPACE_MEMORY; - flags |= (addr0 >> 22) & PCI_BASE_ADDRESS_MEM_TYPE_64; flags |= (addr0 >> 28) & PCI_BASE_ADDRESS_MEM_TYPE_1M; + if (addr0 & 0x01000000) + flags |= IORESOURCE_MEM_64 + | PCI_BASE_ADDRESS_MEM_TYPE_64; if (addr0 & 0x40000000) flags |= IORESOURCE_PREFETCH | PCI_BASE_ADDRESS_MEM_PREFETCH; @@ -655,6 +657,9 @@ struct pci_bus *pci_scan_one_pbm(struct pci_pbm_info *pbm, pbm->io_space.start); pci_add_resource_offset(&resources, &pbm->mem_space, pbm->mem_space.start); + if (pbm->mem64_space.flags) + pci_add_resource_offset(&resources, &pbm->mem64_space, + pbm->mem_space.start); pbm->busn.start = pbm->pci_first_busno; pbm->busn.end = pbm->pci_last_busno; pbm->busn.flags = IORESOURCE_BUS; diff --git a/arch/sparc/kernel/pci_common.c b/arch/sparc/kernel/pci_common.c index 944a065..33524c1 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); diff --git a/arch/sparc/kernel/pci_impl.h b/arch/sparc/kernel/pci_impl.h index 75803c7..37222ca 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. */ |