pci: add pci_for_each_bus_depth_first (eb0acfdd) · Commits · SUMMER2020 / students / proj-2021291

hw/pci/pci.c

+28 −0

Original line number	Diff line number	Diff line
		@@ -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);

+14 −0

Original line number	Diff line number	Diff line
		@@ -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);