qemu: add pci helper functions (Marcelo Tosatti)

Add pci_find_bus/pci_find_device to be used by PCI hotplug.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6592 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 20 insertions, 0 deletions

diff --git a/hw/pci.c b/hw/pci.c
index 0e57d2190b..d0e16fe44f 100644
--- a/hw/pci.c
+++ b/hw/pci.c
@@ -711,6 +711,26 @@ static void pci_bridge_write_config(PCIDevice *d,
     pci_default_write_config(d, address, val, len);
 }
 
+PCIBus *pci_find_bus(int bus_num)
+{
+    PCIBus *bus = first_bus;
+
+    while (bus && bus->bus_num != bus_num)
+        bus = bus->next;
+
+    return bus;
+}
+
+PCIDevice *pci_find_device(int bus_num, int slot, int function)
+{
+    PCIBus *bus = pci_find_bus(bus_num);
+
+    if (!bus)
+        return NULL;
+
+    return bus->devices[PCI_DEVFN(slot, function)];
+}
+
 PCIBus *pci_bridge_init(PCIBus *bus, int devfn, uint16_t vid, uint16_t did,
                         pci_map_irq_fn map_irq, const char *name)
 {