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Subject[PATCH v10 15/29] PCI: Introduce new scan function pci_scan_host_bridge()
Date
Introduce new scan function pci_scan_host_bridge() to
support host bridge drivers that need to provide platform
own pci_host_bridge_ops.

Signed-off-by: Yijing Wang <wangyijing@huawei.com>
---
drivers/pci/probe.c | 23 +++++++++++++++++++++++
include/linux/pci.h | 3 +++
2 files changed, 26 insertions(+), 0 deletions(-)

diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 83cf7c6..708bcf1 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -2064,6 +2064,29 @@ void pci_bus_release_busn_res(struct pci_bus *b)
res, ret ? "can not be" : "is");
}

+struct pci_host_bridge *pci_scan_host_bridge(
+ struct device *parent, int domain,
+ void *sysdata, struct list_head *resources,
+ struct pci_host_bridge_ops *ops)
+{
+ struct pci_host_bridge *host;
+
+ host = pci_create_host_bridge(parent, domain, sysdata,
+ resources, ops);
+ if (!host)
+ return NULL;
+
+ host->bus = __pci_create_root_bus(host, ops->pci_ops);
+ if (!host->bus) {
+ pci_free_host_bridge(host);
+ return NULL;
+ }
+
+ pci_scan_child_bus(host->bus);
+ return host;
+}
+EXPORT_SYMBOL(pci_scan_host_bridge);
+
struct pci_bus *pci_scan_root_bus(struct device *parent, int domain,
int bus, struct pci_ops *ops, void *sysdata,
struct list_head *resources)
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 91fde6a..13edbf1 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -796,6 +796,9 @@ void pci_bus_release_busn_res(struct pci_bus *b);
struct pci_bus *pci_scan_root_bus(struct device *parent, int domain, int bus,
struct pci_ops *ops, void *sysdata,
struct list_head *resources);
+struct pci_host_bridge *pci_scan_host_bridge(struct device *parent,
+ int domain, void *sysdata, struct list_head *resources,
+ struct pci_host_bridge_ops *ops);
struct pci_bus *pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev,
int busnr);
void pcie_update_link_speed(struct pci_bus *bus, u16 link_status);
--
1.7.1


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