diff options
| -rw-r--r-- | src/device/device_const.c | 18 | ||||
| -rw-r--r-- | src/include/device/device.h | 1 |
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); |