[PATCH 03/23] PCI: Add busn_res operation functions

Yinghai Lu
2012-02-24T10:20:57Z

will use them insert/update busn res in pci_bus

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
---
drivers/pci/probe.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++
include/linux/pci.h | 3 +++
2 files changed, 50 insertions(+), 0 deletions(-)

diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index dc904bd..1859ea8 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -1626,6 +1626,53 @@ err_out:
return NULL;
}

+void pci_bus_insert_busn_res(struct pci_bus *b, int bus, int bus_max)
+{
+ struct resource *res = &b->busn_res;
+ struct resource *parent_res;
+ int ret;
+
+ res->start = bus;
+ res->end = bus_max;
+ res->flags = IORESOURCE_BUS;
+
+ /* no parent for root bus' busn_res */
+ if (!pci_is_root_bus(b)) {
+ parent_res = &b->parent->busn_res;
+
+ ret = insert_resource(parent_res, res);
+
+ dev_printk(KERN_DEBUG, &b->dev,
+ "busn_res: %pR %s inserted under %pR\n",
+ res, ret ? "can not be" : "is", parent_res);
+ } else
+ dev_printk(KERN_DEBUG, &b->dev,
+ "busn_res: %pR for root bus\n",
+ res);
+}
+
+void pci_bus_update_busn_res_end(struct pci_bus *b, int bus_max)
+{
+ struct resource *res = &b->busn_res;
+ struct resource old_res = *res;
+
+ res->end = bus_max;
+ dev_printk(KERN_DEBUG, &b->dev,
+ "busn_res: %pR end updated to %pR\n",
+ &old_res, res);
+}
+
+void pci_bus_release_busn_res(struct pci_bus *b)
+{
+ struct resource *res = &b->busn_res;
+ int ret;
+
+ ret = release_resource(res);
+ dev_printk(KERN_DEBUG, &b->dev,
+ "busn_res: %pR %s released\n",
+ res, ret ? "can not be" : "is");
+}
+
struct pci_bus * __devinit pci_scan_root_bus(struct device *parent, 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 2a33c5e..9584ad6 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -646,6 +646,9 @@ struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, void *sysdata);
struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
struct pci_ops *ops, void *sysdata,
struct list_head *resources);
+void pci_bus_insert_busn_res(struct pci_bus *b, int bus, int busmax);
+void pci_bus_update_busn_res_end(struct pci_bus *b, int busmax);
+void pci_bus_release_busn_res(struct pci_bus *b);
struct pci_bus * __devinit pci_scan_root_bus(struct device *parent, int bus,
struct pci_ops *ops, void *sysdata,
struct list_head *resources);
--
1.7.7