Messages in this thread Patch in this message | | | From | Jesse Barnes <> | Subject | [PATCH] PCI mmconfig support for Intel 915 bridges | Date | Wed, 10 Jan 2007 18:53:03 -0800 |
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This is a resend of the patch I sent earlier to Oliver. It adds 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 <jbarnes@virtuousgeek.org>
Thanks, Jesse
diff -Napur -X /home/jbarnes/dontdiff linux-2.6.19-mmconfig.orig/arch/i386/pci/mmconfig-shared.c linux-2.6.19-mmconfig/arch/i386/pci/mmconfig-shared.c --- linux-2.6.19-mmconfig.orig/arch/i386/pci/mmconfig-shared.c 2007-01-07 10:10:29.000000000 -0800 +++ linux-2.6.19-mmconfig/arch/i386/pci/mmconfig-shared.c 2007-01-10 18:46:46.000000000 -0800 @@ -71,6 +71,26 @@ static __init const char *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 __init const char *pci_mmcfg_intel_945(void) { u32 pciexbar, mask = 0, len = 0; @@ -126,6 +146,7 @@ struct pci_mmcfg_hostbridge_probe { static __initdata struct pci_mmcfg_hostbridge_probe pci_mmcfg_probes[] = { { 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 }, }; - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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