From af86fa4001ca5644ae20cc2c52cdf67bb7db9752 Mon Sep 17 00:00:00 2001 From: Yinghai Lu Date: Tue, 20 Oct 2015 11:36:53 -0500 Subject: [PATCH] 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 Tested-by: David Ahern Tested-by: Khalid Aziz Signed-off-by: Yinghai Lu Signed-off-by: Bjorn Helgaas --- arch/sparc/kernel/pci.c | 7 ++++++- arch/sparc/kernel/pci_common.c | 17 +++++++++++++++-- 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 b91d7f146175..badf0951d73c 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 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); 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. */ -- 2.39.5