From: Zhenzhong Duan <zhenzhong.duan@intel.com>

The 2nd parameter of pci_device_get_iommu_bus_devfn() about root PCIBus
backed by an IOMMU for the PCI device, the 3rd is about aliased PCIBus
of the PCI device.

Meanwhile the 3rd and 4th parameters are optional, pass NULL if they
are not needed.

Reviewed-by: Clément Mathieu--Drif <clement.mathieu--drif@eviden.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Message-ID: <20250929034206.439266-4-zhenzhong.duan@intel.com>
Fixes: a849ff5d6f ("pci: Add a pci-level initialization function for IOMMU notifiers")
Fixes: f0f37daf8e ("pci: Add a PCI-level API for PRI")
Fixes: e9b457500a ("pci: Add a pci-level API for ATS")
Fixes: 042cbc9aec ("pci: Add an API to get IOMMU's min page size and virtual address width")
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/pci/pci.c | 18 ++++++++----------
 1 file changed, 8 insertions(+), 10 deletions(-)

diff --git a/hw/pci/pci.c b/hw/pci/pci.c
index 4854d3d618..541e03b38c 100644
--- a/hw/pci/pci.c
+++ b/hw/pci/pci.c
@@ -2964,7 +2964,7 @@ int pci_iommu_init_iotlb_notifier(PCIDevice *dev, IOMMUNotifier *n,
     PCIBus *iommu_bus;
     int devfn;
 
-    pci_device_get_iommu_bus_devfn(dev, &bus, &iommu_bus, &devfn);
+    pci_device_get_iommu_bus_devfn(dev, &iommu_bus, &bus, &devfn);
     if (iommu_bus && iommu_bus->iommu_ops->init_iotlb_notifier) {
         iommu_bus->iommu_ops->init_iotlb_notifier(bus, iommu_bus->iommu_opaque,
                                                   devfn, n, fn, opaque);
@@ -3022,7 +3022,7 @@ int pci_pri_request_page(PCIDevice *dev, uint32_t pasid, bool priv_req,
         return -EPERM;
     }
 
-    pci_device_get_iommu_bus_devfn(dev, &bus, &iommu_bus, &devfn);
+    pci_device_get_iommu_bus_devfn(dev, &iommu_bus, &bus, &devfn);
     if (iommu_bus && iommu_bus->iommu_ops->pri_request_page) {
         return iommu_bus->iommu_ops->pri_request_page(bus,
                                                      iommu_bus->iommu_opaque,
@@ -3046,7 +3046,7 @@ int pci_pri_register_notifier(PCIDevice *dev, uint32_t pasid,
         return -EPERM;
     }
 
-    pci_device_get_iommu_bus_devfn(dev, &bus, &iommu_bus, &devfn);
+    pci_device_get_iommu_bus_devfn(dev, &iommu_bus, &bus, &devfn);
     if (iommu_bus && iommu_bus->iommu_ops->pri_register_notifier) {
         iommu_bus->iommu_ops->pri_register_notifier(bus,
                                                     iommu_bus->iommu_opaque,
@@ -3063,7 +3063,7 @@ void pci_pri_unregister_notifier(PCIDevice *dev, uint32_t pasid)
     PCIBus *iommu_bus;
     int devfn;
 
-    pci_device_get_iommu_bus_devfn(dev, &bus, &iommu_bus, &devfn);
+    pci_device_get_iommu_bus_devfn(dev, &iommu_bus, &bus, &devfn);
     if (iommu_bus && iommu_bus->iommu_ops->pri_unregister_notifier) {
         iommu_bus->iommu_ops->pri_unregister_notifier(bus,
                                                       iommu_bus->iommu_opaque,
@@ -3095,7 +3095,7 @@ ssize_t pci_ats_request_translation(PCIDevice *dev, uint32_t pasid,
         return -EPERM;
     }
 
-    pci_device_get_iommu_bus_devfn(dev, &bus, &iommu_bus, &devfn);
+    pci_device_get_iommu_bus_devfn(dev, &iommu_bus, &bus, &devfn);
     if (iommu_bus && iommu_bus->iommu_ops->ats_request_translation) {
         return iommu_bus->iommu_ops->ats_request_translation(bus,
                                                      iommu_bus->iommu_opaque,
@@ -3119,7 +3119,7 @@ int pci_iommu_register_iotlb_notifier(PCIDevice *dev, uint32_t pasid,
         return -EPERM;
     }
 
-    pci_device_get_iommu_bus_devfn(dev, &bus, &iommu_bus, &devfn);
+    pci_device_get_iommu_bus_devfn(dev, &iommu_bus, &bus, &devfn);
     if (iommu_bus && iommu_bus->iommu_ops->register_iotlb_notifier) {
         iommu_bus->iommu_ops->register_iotlb_notifier(bus,
                                            iommu_bus->iommu_opaque, devfn,
@@ -3141,7 +3141,7 @@ int pci_iommu_unregister_iotlb_notifier(PCIDevice *dev, uint32_t pasid,
         return -EPERM;
     }
 
-    pci_device_get_iommu_bus_devfn(dev, &bus, &iommu_bus, &devfn);
+    pci_device_get_iommu_bus_devfn(dev, &iommu_bus, &bus, &devfn);
     if (iommu_bus && iommu_bus->iommu_ops->unregister_iotlb_notifier) {
         iommu_bus->iommu_ops->unregister_iotlb_notifier(bus,
                                                         iommu_bus->iommu_opaque,
@@ -3155,11 +3155,9 @@ int pci_iommu_unregister_iotlb_notifier(PCIDevice *dev, uint32_t pasid,
 int pci_iommu_get_iotlb_info(PCIDevice *dev, uint8_t *addr_width,
                              uint32_t *min_page_size)
 {
-    PCIBus *bus;
     PCIBus *iommu_bus;
-    int devfn;
 
-    pci_device_get_iommu_bus_devfn(dev, &bus, &iommu_bus, &devfn);
+    pci_device_get_iommu_bus_devfn(dev, &iommu_bus, NULL, NULL);
     if (iommu_bus && iommu_bus->iommu_ops->get_iotlb_info) {
         iommu_bus->iommu_ops->get_iotlb_info(iommu_bus->iommu_opaque,
                                              addr_width, min_page_size);
-- 
MST