Re-use PCI setup functions from hw/vfio/pci.c to realize the vfio-user
PCI device.

Originally-by: John Johnson <john.g.johnson@oracle.com>
Signed-off-by: Elena Ufimtseva <elena.ufimtseva@oracle.com>
Signed-off-by: Jagannathan Raman <jag.raman@oracle.com>
Signed-off-by: John Levon <john.levon@nutanix.com>
---
 hw/vfio/pci.h      |  8 ++++++++
 hw/vfio-user/pci.c | 28 ++++++++++++++++++++++++++++
 hw/vfio/pci.c      | 16 ++++++++--------
 3 files changed, 44 insertions(+), 8 deletions(-)

diff --git a/hw/vfio/pci.h b/hw/vfio/pci.h
index c5fc4aa500..f6524cffb5 100644
--- a/hw/vfio/pci.h
+++ b/hw/vfio/pci.h
@@ -220,6 +220,14 @@ Object *vfio_pci_get_object(VFIODevice *vbasedev);
 int vfio_pci_save_config(VFIODevice *vbasedev, QEMUFile *f, Error **errp);
 int vfio_pci_load_config(VFIODevice *vbasedev, QEMUFile *f);
 void vfio_pci_put_device(VFIOPCIDevice *vdev);
+bool vfio_populate_device(VFIOPCIDevice *vdev, Error **errp);
+void vfio_teardown_msi(VFIOPCIDevice *vdev);
+void vfio_bars_exit(VFIOPCIDevice *vdev);
+bool vfio_add_capabilities(VFIOPCIDevice *vdev, Error **errp);
+void vfio_register_err_notifier(VFIOPCIDevice *vdev);
+void vfio_register_req_notifier(VFIOPCIDevice *vdev);
+bool vfio_pci_config_setup(VFIOPCIDevice *vdev, Error **errp);
+bool vfio_interrupt_setup(VFIOPCIDevice *vdev, Error **errp);
 
 uint64_t vfio_vga_read(void *opaque, hwaddr addr, unsigned size);
 void vfio_vga_write(void *opaque, hwaddr addr, uint64_t data, unsigned size);
diff --git a/hw/vfio-user/pci.c b/hw/vfio-user/pci.c
index 81fc91037d..08edb611ff 100644
--- a/hw/vfio-user/pci.c
+++ b/hw/vfio-user/pci.c
@@ -115,8 +115,36 @@ static void vfio_user_pci_realize(PCIDevice *pdev, Error **errp)
         goto error;
     }
 
+    if (!vfio_populate_device(vdev, errp)) {
+        goto error;
+    }
+
+    if (!vfio_pci_config_setup(vdev, errp)) {
+        goto error;
+    }
+
+    /*
+     * vfio_pci_config_setup will have registered the device's BARs
+     * and setup any MSIX BARs, so errors after it succeeds must
+     * use out_teardown
+     */
+
+    if (!vfio_add_capabilities(vdev, errp)) {
+        goto out_teardown;
+    }
+
+    if (!vfio_interrupt_setup(vdev, errp)) {
+        goto out_teardown;
+    }
+
+    vfio_register_err_notifier(vdev);
+    vfio_register_req_notifier(vdev);
+
     return;
 
+out_teardown:
+    vfio_teardown_msi(vdev);
+    vfio_bars_exit(vdev);
 error:
     error_prepend(errp, VFIO_MSG_PREFIX, vdev->vbasedev.name);
 }
diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c
index ef4095b3ad..fce41cbf1a 100644
--- a/hw/vfio/pci.c
+++ b/hw/vfio/pci.c
@@ -1770,7 +1770,7 @@ static bool vfio_msix_setup(VFIOPCIDevice *vdev, int pos, Error **errp)
     return true;
 }
 
-static void vfio_teardown_msi(VFIOPCIDevice *vdev)
+void vfio_teardown_msi(VFIOPCIDevice *vdev)
 {
     msi_uninit(&vdev->pdev);
 
@@ -1869,7 +1869,7 @@ static void vfio_bars_register(VFIOPCIDevice *vdev)
     }
 }
 
-static void vfio_bars_exit(VFIOPCIDevice *vdev)
+void vfio_bars_exit(VFIOPCIDevice *vdev)
 {
     int i;
 
@@ -2460,7 +2460,7 @@ static void vfio_add_ext_cap(VFIOPCIDevice *vdev)
     g_free(config);
 }
 
-static bool vfio_add_capabilities(VFIOPCIDevice *vdev, Error **errp)
+bool vfio_add_capabilities(VFIOPCIDevice *vdev, Error **errp)
 {
     PCIDevice *pdev = &vdev->pdev;
 
@@ -2807,7 +2807,7 @@ bool vfio_populate_vga(VFIOPCIDevice *vdev, Error **errp)
     return true;
 }
 
-static bool vfio_populate_device(VFIOPCIDevice *vdev, Error **errp)
+bool vfio_populate_device(VFIOPCIDevice *vdev, Error **errp)
 {
     VFIODevice *vbasedev = &vdev->vbasedev;
     struct vfio_region_info *reg_info = NULL;
@@ -2943,7 +2943,7 @@ static void vfio_err_notifier_handler(void *opaque)
  * and continue after disabling error recovery support for the
  * device.
  */
-static void vfio_register_err_notifier(VFIOPCIDevice *vdev)
+void vfio_register_err_notifier(VFIOPCIDevice *vdev)
 {
     Error *err = NULL;
     int32_t fd;
@@ -3002,7 +3002,7 @@ static void vfio_req_notifier_handler(void *opaque)
     }
 }
 
-static void vfio_register_req_notifier(VFIOPCIDevice *vdev)
+void vfio_register_req_notifier(VFIOPCIDevice *vdev)
 {
     struct vfio_irq_info irq_info;
     Error *err = NULL;
@@ -3056,7 +3056,7 @@ static void vfio_unregister_req_notifier(VFIOPCIDevice *vdev)
     vdev->req_enabled = false;
 }
 
-static bool vfio_pci_config_setup(VFIOPCIDevice *vdev, Error **errp)
+bool vfio_pci_config_setup(VFIOPCIDevice *vdev, Error **errp)
 {
     PCIDevice *pdev = &vdev->pdev;
     VFIODevice *vbasedev = &vdev->vbasedev;
@@ -3162,7 +3162,7 @@ static bool vfio_pci_config_setup(VFIOPCIDevice *vdev, Error **errp)
     return true;
 }
 
-static bool vfio_interrupt_setup(VFIOPCIDevice *vdev, Error **errp)
+bool vfio_interrupt_setup(VFIOPCIDevice *vdev, Error **errp)
 {
     PCIDevice *pdev = &vdev->pdev;
 
-- 
2.43.0