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-rw-r--r--src/device/device_const.c13
-rw-r--r--src/include/device/device.h4
2 files changed, 17 insertions, 0 deletions
diff --git a/src/device/device_const.c b/src/device/device_const.c
index 2e0ccc4c3b..de404dc0d1 100644
--- a/src/device/device_const.c
+++ b/src/device/device_const.c
@@ -232,6 +232,19 @@ DEVTREE_CONST struct device *pcidev_on_root(uint8_t dev, uint8_t fn)
return pcidev_path_on_root(PCI_DEVFN(dev, fn));
}
+DEVTREE_CONST struct device *pcidev_path_behind_pci2pci_bridge(
+ const struct device *bridge,
+ pci_devfn_t devfn)
+{
+ if (!bridge || (bridge->path.type != DEVICE_PATH_PCI)) {
+ assert(0);
+ /* Return NULL in case asserts are non-fatal. */
+ return NULL;
+ }
+
+ return pcidev_path_behind(bridge->link_list, devfn);
+}
+
DEVTREE_CONST struct device *pcidev_path_on_root_debug(pci_devfn_t devfn, const char *func)
{
DEVTREE_CONST struct device *dev = pcidev_path_on_root(devfn);
diff --git a/src/include/device/device.h b/src/include/device/device.h
index 4e9c594bc0..a33702a234 100644
--- a/src/include/device/device.h
+++ b/src/include/device/device.h
@@ -293,6 +293,10 @@ 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);
+/* Find PCI device with given D#:F# sitting behind the given PCI-to-PCI bridge device. */
+DEVTREE_CONST struct device *pcidev_path_behind_pci2pci_bridge(
+ const struct device *bridge,
+ pci_devfn_t devfn);
/* To be deprecated, avoid using.
*