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[v3,5/9] pci, acpi, mcfg: Provide generic implementation of MCFG code initialization.

Message ID 1425987320-15020-6-git-send-email-tomasz.nowicki@linaro.org
State New
Headers show

Commit Message

Tomasz Nowicki March 10, 2015, 11:35 a.m. UTC 
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 <tomasz.nowicki@linaro.org>
---
 drivers/acpi/mcfg.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
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Patch

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);
+}