[PATCH v4 5/9] pci, acpi, mcfg: Provide generic implementation of MCFG code initialization.
From: Tomasz Nowicki <hidden>
Date: 2015-03-11 14:15:41
Also in:
linux-acpi, linux-pci, lkml
Subsystem:
acpi, the rest · Maintainers:
"Rafael J. Wysocki", Linus Torvalds
Those two functions are required by ACPI subsystem to make PCI config space accessible. Generic code assume to do nothing for early init call but late init call does as follow: - parse MCFG table and add regions to ECAM resource list - map regions - add regions to iomem_resource Signed-off-by: Tomasz Nowicki <redacted> --- drivers/acpi/mcfg.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+)
diff --git a/drivers/acpi/mcfg.c b/drivers/acpi/mcfg.c
index a2e2326..1e646fc 100644
--- a/drivers/acpi/mcfg.c
+++ b/drivers/acpi/mcfg.c@@ -79,3 +79,23 @@ int __init acpi_parse_mcfg(struct acpi_table_header *header) return 0; } + +void __init __weak pci_mmcfg_early_init(void) +{ + +} + +void __init __weak pci_mmcfg_late_init(void) +{ + struct pci_mmcfg_region *cfg; + + acpi_table_parse(ACPI_SIG_MCFG, acpi_parse_mcfg); + + if (list_empty(&pci_mmcfg_list)) + return; + if (!pci_mmcfg_arch_init()) + free_all_mmcfg(); + + list_for_each_entry(cfg, &pci_mmcfg_list, list) + insert_resource(&iomem_resource, &cfg->res); +}
--
1.9.1