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-rw-r--r--src/device/device_const.c26
-rw-r--r--src/include/device/device.h5
2 files changed, 31 insertions, 0 deletions
diff --git a/src/device/device_const.c b/src/device/device_const.c
index 90b68679e9..ec128e877d 100644
--- a/src/device/device_const.c
+++ b/src/device/device_const.c
@@ -22,6 +22,7 @@
#include <device/device.h>
#include <device/path.h>
#include <device/pci.h>
+#include <device/pci_def.h>
#include <device/resource.h>
/** Linked list of ALL devices */
@@ -172,6 +173,31 @@ DEVTREE_CONST struct device *find_dev_path(
return child;
}
+DEVTREE_CONST struct device *pcidev_path_behind(
+ const struct bus *parent, pci_devfn_t devfn)
+{
+ const struct device_path path = {
+ .type = DEVICE_PATH_PCI,
+ .pci.devfn = devfn,
+ };
+ return find_dev_path(parent, &path);
+}
+
+DEVTREE_CONST struct device *pcidev_path_on_root(pci_devfn_t devfn)
+{
+ DEVTREE_CONST struct device *pci_domain;
+
+ pci_domain = dev_find_path(NULL, DEVICE_PATH_DOMAIN);
+ if (!pci_domain)
+ return NULL;
+ return pcidev_path_behind(pci_domain->link_list, devfn);
+}
+
+DEVTREE_CONST struct device *pcidev_on_root(uint8_t dev, uint8_t fn)
+{
+ return pcidev_path_on_root(PCI_DEVFN(dev, fn));
+}
+
/**
* Given an SMBus bus and a device number, find the device structure.
*
diff --git a/src/include/device/device.h b/src/include/device/device.h
index 5e539ea339..540b7e3899 100644
--- a/src/include/device/device.h
+++ b/src/include/device/device.h
@@ -276,6 +276,11 @@ DEVTREE_CONST struct device *dev_find_slot_pnp(u16 port, u16 device);
DEVTREE_CONST struct device *dev_bus_each_child(const struct bus *parent,
DEVTREE_CONST struct device *prev_child);
+DEVTREE_CONST struct device *pcidev_path_behind(const struct bus *parent,
+ pci_devfn_t devfn);
+DEVTREE_CONST struct device *pcidev_path_on_root(pci_devfn_t devfn);
+DEVTREE_CONST struct device *pcidev_on_root(uint8_t dev, uint8_t fn);
+
void scan_smbus(struct device *bus);
void scan_generic_bus(struct device *bus);
void scan_static_bus(struct device *bus);