pci: introduce multifunction property.

introduce multifunction property.
Also introduce new convenient device creation function which
will be used later.

For bisectability this patch doesn't do anything, but sets the property
resulting in no functional changes.
Actual changes will be introduced by later patch.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>

2 files changed, 28 insertions, 3 deletions

diff --git a/hw/pci.c b/hw/pci.c
index 81fff66e2d..bbb14d3b0a 100644
--- a/hw/pci.c
+++ b/hw/pci.c
@@ -69,6 +69,8 @@ static struct BusInfo pci_bus_info = {
         DEFINE_PROP_PCI_DEVFN("addr", PCIDevice, devfn, -1),
         DEFINE_PROP_STRING("romfile", PCIDevice, romfile),
         DEFINE_PROP_UINT32("rombar",  PCIDevice, rom_bar, 1),
+        DEFINE_PROP_BIT("multifunction", PCIDevice, cap_present,
+                        QEMU_PCI_CAP_MULTIFUNCTION_BITNR, false),
         DEFINE_PROP_END_OF_LIST()
     }
 };
@@ -1659,22 +1661,36 @@ void pci_qdev_register_many(PCIDeviceInfo *info)
     }
 }
 
-PCIDevice *pci_create(PCIBus *bus, int devfn, const char *name)
+PCIDevice *pci_create_multifunction(PCIBus *bus, int devfn, bool multifunction,
+                                    const char *name)
 {
     DeviceState *dev;
 
     dev = qdev_create(&bus->qbus, name);
     qdev_prop_set_uint32(dev, "addr", devfn);
+    qdev_prop_set_bit(dev, "multifunction", multifunction);
     return DO_UPCAST(PCIDevice, qdev, dev);
 }
 
-PCIDevice *pci_create_simple(PCIBus *bus, int devfn, const char *name)
+PCIDevice *pci_create_simple_multifunction(PCIBus *bus, int devfn,
+                                           bool multifunction,
+                                           const char *name)
 {
-    PCIDevice *dev = pci_create(bus, devfn, name);
+    PCIDevice *dev = pci_create_multifunction(bus, devfn, multifunction, name);
     qdev_init_nofail(&dev->qdev);
     return dev;
 }
 
+PCIDevice *pci_create(PCIBus *bus, int devfn, const char *name)
+{
+    return pci_create_multifunction(bus, devfn, false, name);
+}
+
+PCIDevice *pci_create_simple(PCIBus *bus, int devfn, const char *name)
+{
+    return pci_create_simple_multifunction(bus, devfn, false, name);
+}
+
 static int pci_find_space(PCIDevice *pdev, uint8_t size)
 {
     int config_size = pci_config_size(pdev);
diff --git a/hw/pci.h b/hw/pci.h
index 5fda430a97..2097a7ca9f 100644
--- a/hw/pci.h
+++ b/hw/pci.h
@@ -111,6 +111,10 @@ typedef struct PCIIORegion {
 enum {
     QEMU_PCI_CAP_MSIX = 0x1,
     QEMU_PCI_CAP_EXPRESS = 0x2,
+
+    /* multifunction capable device */
+#define QEMU_PCI_CAP_MULTIFUNCTION_BITNR        2
+    QEMU_PCI_CAP_MULTIFUNCTION = (1 << QEMU_PCI_CAP_MULTIFUNCTION_BITNR),
 };
 
 struct PCIDevice {
@@ -342,6 +346,11 @@ typedef struct {
 void pci_qdev_register(PCIDeviceInfo *info);
 void pci_qdev_register_many(PCIDeviceInfo *info);
 
+PCIDevice *pci_create_multifunction(PCIBus *bus, int devfn, bool multifunction,
+                                    const char *name);
+PCIDevice *pci_create_simple_multifunction(PCIBus *bus, int devfn,
+                                           bool multifunction,
+                                           const char *name);
 PCIDevice *pci_create(PCIBus *bus, int devfn, const char *name);
 PCIDevice *pci_create_simple(PCIBus *bus, int devfn, const char *name);