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Subject[PATCH v10 17/29] x86/PCI: Refine pci_acpi_scan_root() with generic pci_host_bridge
Date
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
CC: Thomas Gleixner <tglx@linutronix.de>
CC: x86@kernel.org
---
arch/x86/pci/acpi.c | 37 +++++++++++++++++++++----------------
1 files changed, 21 insertions(+), 16 deletions(-)

diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c
index d6aab1c..ec16499 100644
--- a/arch/x86/pci/acpi.c
+++ b/arch/x86/pci/acpi.c
@@ -354,6 +354,19 @@ static void probe_pci_root_info(struct pci_root_info *info,
}
}

+static int pci_host_bridge_prepare(struct pci_host_bridge *bridge)
+{
+ struct pci_sysdata *sd = dev_get_drvdata(&bridge->dev);
+
+ ACPI_COMPANION_SET(&bridge->dev, sd->companion);
+ return 0;
+}
+
+static struct pci_host_bridge_ops pci_host_ops = {
+ .pci_ops = &pci_root_ops,
+ .prepare = pci_host_bridge_prepare,
+};
+
struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
{
struct acpi_device *device = root->device;
@@ -364,6 +377,7 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
LIST_HEAD(crs_res);
LIST_HEAD(resources);
struct pci_bus *bus;
+ struct pci_host_bridge *host = NULL;
struct pci_sysdata *sd;
int node;

@@ -430,14 +444,13 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)

if (!setup_mcfg_map(info, domain, (u8)root->secondary.start,
(u8)root->secondary.end, root->mcfg_addr))
- bus = pci_create_root_bus(NULL, domain, &pci_root_ops,
- sd, &resources);
-
- if (bus) {
- pci_scan_child_bus(bus);
- pci_set_host_bridge_release(
- to_pci_host_bridge(bus->bridge),
- release_pci_root_info, info);
+ host = pci_scan_host_bridge(NULL, domain, sd, &resources,
+ &pci_host_ops);
+
+ if (host) {
+ bus = host->bus;
+ pci_set_host_bridge_release(host,
+ release_pci_root_info, info);
} else {
resource_list_free(&resources);
teardown_mcfg_map(info);
@@ -460,14 +473,6 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
return bus;
}

-int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge)
-{
- struct pci_sysdata *sd = bridge->bus->sysdata;
-
- ACPI_COMPANION_SET(&bridge->dev, sd->companion);
- return 0;
-}
-
int __init pci_acpi_init(void)
{
struct pci_dev *dev = NULL;
--
1.7.1


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