From 6a0668fc41fa479df617151c2d4e297299a4ffe2 Mon Sep 17 00:00:00 2001 From: Olivier Galibert Date: Tue, 13 Feb 2007 13:26:20 +0100 Subject: [PATCH] [PATCH] mmconfig: Reserve resources but only when we're sure about them. Put back the resource reservation as per 4c6e052adfe285ede5884e4e8c4d33af33932c13 but use it *only* when the range(s) come from a chipset probe instead of the bios. Signed-off-by: Olivier Galibert Signed-off-by: Andi Kleen Cc: Andi Kleen Signed-off-by: Andrew Morton --- arch/i386/pci/mmconfig-shared.c | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) diff --git a/arch/i386/pci/mmconfig-shared.c b/arch/i386/pci/mmconfig-shared.c index d72f0439147c..4757554b08cf 100644 --- a/arch/i386/pci/mmconfig-shared.c +++ b/arch/i386/pci/mmconfig-shared.c @@ -166,6 +166,37 @@ static int __init pci_mmcfg_check_hostbridge(void) return name != NULL; } +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); + res->start = pci_mmcfg_config[i].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 known_bridge = 0; @@ -199,6 +230,8 @@ void __init pci_mmcfg_init(int type) if (pci_mmcfg_arch_init()) { if (type == 1) unreachable_devices(); + if (known_bridge) + pci_mmcfg_insert_resources(); pci_probe = (pci_probe & ~PCI_PROBE_MASK) | PCI_PROBE_MMCONF; } } -- 2.30.2