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author | Michael S. Tsirkin <mst@redhat.com> | 2013-10-14 18:01:07 +0300 |
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committer | Michael S. Tsirkin <mst@redhat.com> | 2014-01-26 13:06:49 +0200 |
commit | eb0acfdde604930688c47fe1ba99bec2bd84b7ad (patch) | |
tree | bb169f4088ca405e51683abcdfdc7a04c329a121 | |
parent | 4d25299cb2b57a16fd3194e938eeb78d219400ba (diff) | |
download | hqemu-eb0acfdde604930688c47fe1ba99bec2bd84b7ad.zip hqemu-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.c | 28 | ||||
-rw-r--r-- | include/hw/pci/pci.h | 14 |
2 files changed, 42 insertions, 0 deletions
diff --git a/hw/pci/pci.c b/hw/pci/pci.c index aa2a395..2aca8a4 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 754b82d..5252346 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); |