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-rw-r--r--src/device/device_const.c18
-rw-r--r--src/include/device/device.h1
2 files changed, 19 insertions, 0 deletions
diff --git a/src/device/device_const.c b/src/device/device_const.c
index 1853b4c4d2..c1b0b063ff 100644
--- a/src/device/device_const.c
+++ b/src/device/device_const.c
@@ -183,6 +183,24 @@ DEVTREE_CONST struct device *pcidev_path_behind(
return find_dev_path(parent, &path);
}
+DEVTREE_CONST struct device *pcidev_path_on_bus(unsigned int bus, pci_devfn_t devfn)
+{
+ DEVTREE_CONST struct bus *parent = pci_root_bus();
+ DEVTREE_CONST struct device *dev = parent->children;
+
+ /* FIXME: Write the loop with topology links. */
+ while (dev) {
+ if (dev->path.type != DEVICE_PATH_PCI) {
+ dev = dev->next;
+ continue;
+ }
+ if (dev->bus->secondary == bus)
+ return pcidev_path_behind(dev->bus, devfn);
+ dev = dev->next;
+ }
+ return NULL;
+}
+
DEVTREE_CONST struct bus *pci_root_bus(void)
{
DEVTREE_CONST struct device *pci_domain;
diff --git a/src/include/device/device.h b/src/include/device/device.h
index a200de0876..007c51f629 100644
--- a/src/include/device/device.h
+++ b/src/include/device/device.h
@@ -288,6 +288,7 @@ DEVTREE_CONST struct device *dev_bus_each_child(const struct bus *parent,
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_path_on_bus(unsigned int bus, pci_devfn_t devfn);
DEVTREE_CONST struct device *pcidev_on_root(uint8_t dev, uint8_t fn);
DEVTREE_CONST struct bus *pci_root_bus(void);