diff options
Diffstat (limited to 'arch/i386/pci/mmconfig.c')
| -rw-r--r-- | arch/i386/pci/mmconfig.c | 46 |
1 files changed, 43 insertions, 3 deletions
diff --git a/arch/i386/pci/mmconfig.c b/arch/i386/pci/mmconfig.c index 972180f738d..d0c3da3aa2a 100644 --- a/arch/i386/pci/mmconfig.c +++ b/arch/i386/pci/mmconfig.c @@ -67,7 +67,10 @@ static u32 get_base_addr(unsigned int seg, int bus, unsigned devfn) return 0; } -static inline void pci_exp_set_dev_base(unsigned int base, int bus, int devfn) +/* + * This is always called under pci_config_lock + */ +static void pci_exp_set_dev_base(unsigned int base, int bus, int devfn) { u32 dev_base = base | (bus << 20) | (devfn << 12); if (dev_base != mmcfg_last_accessed_device) { @@ -151,6 +154,38 @@ static struct pci_raw_ops pci_mmcfg = { .write = pci_mmcfg_write, }; + +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; + } +} + /* K8 systems have some devices (typically in the builtin northbridge) that are only accessible using type1 Normally this can be expressed in the MCFG by not listing them @@ -187,7 +222,9 @@ static __init void unreachable_devices(void) } } -void __init pci_mmcfg_init(void) + + +void __init pci_mmcfg_init(int type) { if ((pci_probe & PCI_PROBE_MMCONF) == 0) return; @@ -198,7 +235,9 @@ void __init pci_mmcfg_init(void) (pci_mmcfg_config[0].base_address == 0)) return; - if (!e820_all_mapped(pci_mmcfg_config[0].base_address, + /* Only do this check when type 1 works. If it doesn't work + assume we run on a Mac and always use MCFG */ + if (type == 1 && !e820_all_mapped(pci_mmcfg_config[0].base_address, pci_mmcfg_config[0].base_address + MMCONFIG_APER_MIN, E820_RESERVED)) { printk(KERN_ERR "PCI: BIOS Bug: MCFG area at %x is not E820-reserved\n", @@ -212,4 +251,5 @@ void __init pci_mmcfg_init(void) pci_probe = (pci_probe & ~PCI_PROBE_MASK) | PCI_PROBE_MMCONF; unreachable_devices(); + pci_mmcfg_insert_resources(); } |