From: Jesse Barnes Add support for Intel 915 bridge chips to the new PCI MMConfig detection code. Tested and works on my sole 915 based platform (a Toshiba laptop). I added register masking per Oliver's suggestion, and moved the __init qualifier to after the 'static const char' to match Ogawa-san's recent cleanup patches. Over time we can probably associate more PCI IDs with this routine, since i915 family contains a few other chips. But since I didn't have platforms to test such additions on, they're left out for now. Signed-off-by: Jesse Barnes Acked-by: Olivier Galibert Cc: Andi Kleen Signed-off-by: Andrew Morton --- arch/i386/pci/mmconfig-shared.c | 21 +++++++++++++++++++++ 1 files changed, 21 insertions(+) diff -puN arch/i386/pci/mmconfig-shared.c~pci-mmconfig-support-for-intel-915-bridges arch/i386/pci/mmconfig-shared.c --- a/arch/i386/pci/mmconfig-shared.c~pci-mmconfig-support-for-intel-915-bridges +++ a/arch/i386/pci/mmconfig-shared.c @@ -70,6 +70,26 @@ static const char __init *pci_mmcfg_e752 return "Intel Corporation E7520 Memory Controller Hub"; } +static const char __init *pci_mmcfg_intel_915(void) +{ + u32 pciexbar, len = 0; + + pci_conf1_read(0, 0, PCI_DEVFN(0,0), 0x48, 4, &pciexbar); + + /* No enable bit or size field, so assume 256M range is enabled. */ + len = 0x10000000U; + pci_mmcfg_config_num = 1; + pciexbar &= 0xe0000000; /* mask out potentially bogus bits */ + + pci_mmcfg_config = kzalloc(sizeof(pci_mmcfg_config[0]), GFP_KERNEL); + pci_mmcfg_config[0].base_address = pciexbar; + pci_mmcfg_config[0].pci_segment_group_number = 0; + pci_mmcfg_config[0].start_bus_number = 0; + pci_mmcfg_config[0].end_bus_number = (len >> 20) - 1; + + return "Intel Corporation 915PM/GM/GMS Express Memory Controller Hub"; +} + static const char __init *pci_mmcfg_intel_945(void) { u32 pciexbar, mask = 0, len = 0; @@ -125,6 +145,7 @@ struct pci_mmcfg_hostbridge_probe { static struct pci_mmcfg_hostbridge_probe pci_mmcfg_probes[] __initdata = { { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7520_MCH, pci_mmcfg_e7520 }, + { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82915GM_HB, pci_mmcfg_intel_915 }, { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82945G_HB, pci_mmcfg_intel_945 }, }; _