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Subject[PATCH 02/13] PCI: Add busn_res operation functions
Date
will use them insert/update busn res in pci_bus

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
---
drivers/pci/probe.c | 44 ++++++++++++++++++++++++++++++++++++++++++++
include/linux/pci.h | 3 +++
2 files changed, 47 insertions(+), 0 deletions(-)
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index a114173..71261da 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -1622,6 +1622,50 @@ 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 = &iobusn_resource;
+ int ret;
+
+ res->start = (pci_domain_nr(b) << 8) | bus;
+ res->end = (pci_domain_nr(b) << 8) | bus_max;
+ res->flags = IORESOURCE_BUS;
+
+ 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: %06llx-%06llx %s inserted under %06llx-%06llx\n",
+ (unsigned long long)res->start,
+ (unsigned long long)res->end,
+ ret ? "can not be" : "is",
+ (unsigned long long)parent_res->start,
+ (unsigned long long)parent_res->end);
+}
+
+void pci_bus_update_busn_res_end(struct pci_bus *b, int bus_max)
+{
+ struct resource *res = &b->busn_res;
+ unsigned long long old_end = res->end;
+
+ res->end &= ~0xff;
+ res->end |= bus_max;
+ dev_printk(KERN_DEBUG, &b->dev,
+ "busn_res: %06llx-%06llx end updated to %06llx-%06llx\n",
+ (unsigned long long)res->start,
+ old_end,
+ (unsigned long long)res->start,
+ (unsigned long long)res->end);
+}
+
+void pci_bus_release_busn_res(struct pci_bus *b)
+{
+ release_resource(&b->busn_res);
+}
+
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 94ad468..3da935c 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -665,6 +665,9 @@ 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


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