[PATCH v2 23/29] vfio-user: implement VFIO_USER_DEVICE_RESET

[John Levon <john.levon@nutanix.com>]

Hook this call up to the legacy reset handler for vfio-user-pci.

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-user/device.h |  2 ++
 hw/vfio-user/device.c | 12 ++++++++++++
 hw/vfio-user/pci.c    | 15 +++++++++++++++
 3 files changed, 29 insertions(+)

diff --git a/hw/vfio-user/device.h b/hw/vfio-user/device.h
index a5a2aa9ba6..25cd4c8a00 100644
--- a/hw/vfio-user/device.h
+++ b/hw/vfio-user/device.h
@@ -20,6 +20,8 @@
 int vfio_user_get_device_info(VFIOUserProxy *proxy,
                               struct vfio_device_info *info);
 
+void vfio_user_device_reset(VFIOUserProxy *proxy);
+
 extern VFIODeviceIOOps vfio_user_device_io_ops_sock;
 
 #endif /* VFIO_USER_DEVICE_H */
diff --git a/hw/vfio-user/device.c b/hw/vfio-user/device.c
index 45b91d22f0..b37f7329a1 100644
--- a/hw/vfio-user/device.c
+++ b/hw/vfio-user/device.c
@@ -49,6 +49,18 @@ int vfio_user_get_device_info(VFIOUserProxy *proxy,
     return 0;
 }
 
+void vfio_user_device_reset(VFIOUserProxy *proxy)
+{
+    VFIOUserHdr msg;
+
+    vfio_user_request_msg(&msg, VFIO_USER_DEVICE_RESET, sizeof(msg), 0);
+
+    vfio_user_send_wait(proxy, &msg, NULL, 0);
+    if (msg.flags & VFIO_USER_ERROR) {
+        error_printf("reset reply error %d\n", msg.error_reply);
+    }
+}
+
 static int vfio_user_get_region_info(VFIOUserProxy *proxy,
                                      struct vfio_region_info *info,
                                      VFIOUserFDs *fds)
diff --git a/hw/vfio-user/pci.c b/hw/vfio-user/pci.c
index 5904e7ebc5..2c3edb7378 100644
--- a/hw/vfio-user/pci.c
+++ b/hw/vfio-user/pci.c
@@ -251,6 +251,20 @@ static void vfio_user_instance_finalize(Object *obj)
     }
 }
 
+static void vfio_user_pci_reset(DeviceState *dev)
+{
+    VFIOPCIDevice *vdev = VFIO_PCI_BASE(dev);
+    VFIODevice *vbasedev = &vdev->vbasedev;
+
+    vfio_pci_pre_reset(vdev);
+
+    if (vbasedev->reset_works) {
+        vfio_user_device_reset(vbasedev->proxy);
+    }
+
+    vfio_pci_post_reset(vdev);
+}
+
 static const Property vfio_user_pci_dev_properties[] = {
     DEFINE_PROP_UINT32("x-pci-vendor-id", VFIOPCIDevice,
                        vendor_id, PCI_ANY_ID),
@@ -269,6 +283,7 @@ static void vfio_user_pci_dev_class_init(ObjectClass *klass, const void *data)
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *pdc = PCI_DEVICE_CLASS(klass);
 
+    device_class_set_legacy_reset(dc, vfio_user_pci_reset);
     device_class_set_props(dc, vfio_user_pci_dev_properties);
     dc->desc = "VFIO over socket PCI device assignment";
     pdc->realize = vfio_user_pci_realize;
-- 
2.43.0