From 4c6e052adfe285ede5884e4e8c4d33af33932c13 Mon Sep 17 00:00:00 2001 From: Aaron Durbin Date: Tue, 26 Sep 2006 10:52:40 +0200 Subject: [PATCH] [PATCH] MMCONFIG and new Intel motherboards On Sat, Sep 09, 2006 at 04:14:29PM +0200, Andi Kleen wrote: > [patch] Looks reasonable, but probably not for 2.6.18 because this stuff > is already too fragile and it is probably too risky to do any big changes now > since not enough testing time is left. Can you please resubmit > it with proper description and signed-off-by line? I can queue it for .19 then > > -Andi Patch inserts PCI memory mapped config region(s) into the resource map. This will allow for the MMCCONFIG regions to be marked as busy in the iomem address space as well as the regions(s) showing up in /proc/iomem. Signed-off-by: Aaron Durbin Signed-off-by: Andi Kleen --- arch/x86_64/pci/mmconfig.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/arch/x86_64/pci/mmconfig.c b/arch/x86_64/pci/mmconfig.c index 8bea51030d..8c0722b95c 100644 --- a/arch/x86_64/pci/mmconfig.c +++ b/arch/x86_64/pci/mmconfig.c @@ -163,6 +163,37 @@ static __init void unreachable_devices(void) } } +static __init void pci_mmcfg_insert_resources(void) +{ +#define PCI_MMCFG_RESOURCE_NAME_LEN 19 + int i; + struct resource *res; + char *names; + unsigned num_buses; + + res = kcalloc(PCI_MMCFG_RESOURCE_NAME_LEN + sizeof(*res), + pci_mmcfg_config_num, GFP_KERNEL); + + if (!res) { + printk(KERN_ERR "PCI: Unable to allocate MMCONFIG resources\n"); + return; + } + + names = (void *)&res[pci_mmcfg_config_num]; + for (i = 0; i < pci_mmcfg_config_num; i++, res++) { + num_buses = pci_mmcfg_config[i].end_bus_number - + pci_mmcfg_config[i].start_bus_number + 1; + res->name = names; + snprintf(names, PCI_MMCFG_RESOURCE_NAME_LEN, "PCI MMCONFIG %u", + pci_mmcfg_config[i].pci_segment_group_number); + res->start = pci_mmcfg_config[i].base_address; + res->end = res->start + (num_buses << 20) - 1; + res->flags = IORESOURCE_MEM | IORESOURCE_BUSY; + insert_resource(&iomem_resource, res); + names += PCI_MMCFG_RESOURCE_NAME_LEN; + } +} + void __init pci_mmcfg_init(int type) { int i; @@ -206,6 +237,7 @@ void __init pci_mmcfg_init(int type) } unreachable_devices(); + pci_mmcfg_insert_resources(); raw_pci_ops = &pci_mmcfg; pci_probe = (pci_probe & ~PCI_PROBE_MASK) | PCI_PROBE_MMCONF; -- 2.39.5