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authorMichael S. Tsirkin <mst@redhat.com>2013-10-14 18:01:07 +0300
committerMichael S. Tsirkin <mst@redhat.com>2014-01-26 13:06:49 +0200
commiteb0acfdde604930688c47fe1ba99bec2bd84b7ad (patch)
treebb169f4088ca405e51683abcdfdc7a04c329a121
parent4d25299cb2b57a16fd3194e938eeb78d219400ba (diff)
downloadqemu-arm-eb0acfdde604930688c47fe1ba99bec2bd84b7ad.tar.gz
pci: add pci_for_each_bus_depth_first
Useful for ACPI hotplug. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
-rw-r--r--hw/pci/pci.c28
-rw-r--r--include/hw/pci/pci.h14
2 files changed, 42 insertions, 0 deletions
diff --git a/hw/pci/pci.c b/hw/pci/pci.c
index aa2a395499..2aca8a4d7e 100644
--- a/hw/pci/pci.c
+++ b/hw/pci/pci.c
@@ -1704,6 +1704,34 @@ static PCIBus *pci_find_bus_nr(PCIBus *bus, int bus_num)
return NULL;
}
+void pci_for_each_bus_depth_first(PCIBus *bus,
+ void *(*begin)(PCIBus *bus, void *parent_state),
+ void (*end)(PCIBus *bus, void *state),
+ void *parent_state)
+{
+ PCIBus *sec;
+ void *state;
+
+ if (!bus) {
+ return;
+ }
+
+ if (begin) {
+ state = begin(bus, parent_state);
+ } else {
+ state = parent_state;
+ }
+
+ QLIST_FOREACH(sec, &bus->child, sibling) {
+ pci_for_each_bus_depth_first(sec, begin, end, state);
+ }
+
+ if (end) {
+ end(bus, state);
+ }
+}
+
+
PCIDevice *pci_find_device(PCIBus *bus, int bus_num, uint8_t devfn)
{
bus = pci_find_bus_nr(bus, bus_num);
diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h
index 754b82de81..52523467b6 100644
--- a/include/hw/pci/pci.h
+++ b/include/hw/pci/pci.h
@@ -387,6 +387,20 @@ int pci_bus_num(PCIBus *s);
void pci_for_each_device(PCIBus *bus, int bus_num,
void (*fn)(PCIBus *bus, PCIDevice *d, void *opaque),
void *opaque);
+void pci_for_each_bus_depth_first(PCIBus *bus,
+ void *(*begin)(PCIBus *bus, void *parent_state),
+ void (*end)(PCIBus *bus, void *state),
+ void *parent_state);
+
+/* Use this wrapper when specific scan order is not required. */
+static inline
+void pci_for_each_bus(PCIBus *bus,
+ void (*fn)(PCIBus *bus, void *opaque),
+ void *opaque)
+{
+ pci_for_each_bus_depth_first(bus, NULL, fn, opaque);
+}
+
PCIBus *pci_find_primary_bus(void);
PCIBus *pci_device_root_bus(const PCIDevice *d);
const char *pci_root_bus_path(PCIDevice *dev);