struct pci_device *pci_device_find_by_slot(uint32_t domain, uint32_t bus,
uint32_t dev, uint32_t func);
+struct pci_device *pci_device_get_parent_bridge(struct pci_device *dev);
+
void pci_get_strings(const struct pci_id_match *m,
const char **device_name, const char **vendor_name,
const char **subdevice_name, const char **subvendor_name);
return 0;
}
+
+#define PCI_CLASS_BRIDGE 0x06
+#define PCI_SUBCLASS_BRIDGE_PCI 0x04
+
+struct pci_device *
+pci_device_get_parent_bridge(struct pci_device *dev)
+{
+ struct pci_id_match bridge_match = {
+ PCI_MATCH_ANY, PCI_MATCH_ANY, PCI_MATCH_ANY, PCI_MATCH_ANY,
+ (PCI_CLASS_BRIDGE << 16) | (PCI_SUBCLASS_BRIDGE_PCI << 8),
+ 0
+ };
+
+ struct pci_device *bridge;
+ struct pci_device_iterator *iter;
+
+ if (dev == NULL)
+ return NULL;
+
+ iter = pci_id_match_iterator_create(& bridge_match);
+ if (iter == NULL)
+ return NULL;
+
+ while ((bridge = pci_device_next(iter)) != NULL) {
+ if (bridge->domain == dev->domain) {
+ const struct pci_bridge_info *info =
+ pci_device_get_bridge_info(bridge);
+
+ if (info != NULL) {
+ if (info->secondary_bus == dev->bus) {
+ break;
+ }
+ }
+ }
+ }
+
+ pci_iterator_destroy(iter);
+
+ return bridge;
+}