diff --git a/sys/dev/pci/pci.c b/sys/dev/pci/pci.c
--- a/sys/dev/pci/pci.c
+++ b/sys/dev/pci/pci.c
@@ -3170,6 +3170,21 @@
 	return (NULL);
 }
 
+struct pci_map *
+pci_first_bar(device_t dev)
+{
+	struct pci_devinfo *dinfo;
+
+	dinfo = device_get_ivars(dev);
+	return (STAILQ_FIRST(&dinfo->cfg.maps));
+}
+
+struct pci_map *
+pci_next_bar(struct pci_map *pm)
+{
+	return (STAILQ_NEXT(pm, pm_link));
+}
+
 int
 pci_bar_enabled(device_t dev, struct pci_map *pm)
 {
diff --git a/sys/dev/pci/pcivar.h b/sys/dev/pci/pcivar.h
--- a/sys/dev/pci/pcivar.h
+++ b/sys/dev/pci/pcivar.h
@@ -717,6 +717,8 @@
 extern uint32_t	pci_generation;
 
 struct pci_map *pci_find_bar(device_t dev, int reg);
+struct pci_map *pci_first_bar(device_t dev);
+struct pci_map *pci_next_bar(struct pci_map *pm);
 int	pci_bar_enabled(device_t dev, struct pci_map *pm);
 struct pcicfg_vpd *pci_fetch_vpd_list(device_t dev);