[RFC v4 19/21] vfio-user: pci reset

[John Johnson]

Message to tell the server to reset the device.

Signed-off-by: Elena Ufimtseva <elena.ufimts...@oracle.com>
Signed-off-by: John G Johnson <john.g.john...@oracle.com>
Signed-off-by: Jagannathan Raman <jag.ra...@oracle.com>
---
 hw/vfio/user.h |  1 +
 hw/vfio/pci.c  | 15 +++++++++++++++
 hw/vfio/user.c | 12 ++++++++++++
 3 files changed, 28 insertions(+)

diff --git a/hw/vfio/user.h b/hw/vfio/user.h
index e6c1091..7504681 100644
--- a/hw/vfio/user.h
+++ b/hw/vfio/user.h
@@ -88,6 +88,7 @@ void vfio_user_send_reply(VFIOProxy *proxy, VFIOUserHdr *hdr, 
int size);
 void vfio_user_send_error(VFIOProxy *proxy, VFIOUserHdr *hdr, int error);
 void vfio_user_putfds(VFIOUserMsg *msg);
 int vfio_user_validate_version(VFIODevice *vbasedev, Error **errp);
+void vfio_user_reset(VFIOProxy *proxy);
 
 extern VFIODevIO vfio_dev_io_sock;
 extern VFIOContIO vfio_cont_io_sock;
diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c
index 7479dc4..d47b98e 100644
--- a/hw/vfio/pci.c
+++ b/hw/vfio/pci.c
@@ -3713,6 +3713,20 @@ 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_reset(vbasedev->proxy);
+    }
+
+    vfio_pci_post_reset(vdev);
+}
+
 static Property vfio_user_pci_dev_properties[] = {
     DEFINE_PROP_STRING("socket", VFIOUserPCIDevice, sock_name),
     DEFINE_PROP_BOOL("secure-dma", VFIOUserPCIDevice, secure_dma, false),
@@ -3726,6 +3740,7 @@ static void vfio_user_pci_dev_class_init(ObjectClass 
*klass, void *data)
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *pdc = PCI_DEVICE_CLASS(klass);
 
+    dc->reset = 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;
diff --git a/hw/vfio/user.c b/hw/vfio/user.c
index e377b0f..33d8f06 100644
--- a/hw/vfio/user.c
+++ b/hw/vfio/user.c
@@ -1398,6 +1398,18 @@ static int vfio_user_region_write(VFIOProxy *proxy, 
uint8_t index, off_t offset,
     return ret;
 }
 
+void vfio_user_reset(VFIOProxy *proxy)
+{
+    VFIOUserHdr msg;
+
+    vfio_user_request_msg(&msg, VFIO_USER_DEVICE_RESET, sizeof(msg), 0);
+
+    vfio_user_send_wait(proxy, &msg, NULL, 0, false);
+    if (msg.flags & VFIO_USER_ERROR) {
+        error_printf("reset reply error %d\n", msg.error_reply);
+    }
+}
+
 
 /*
  * Socket-based io_ops
-- 
1.8.3.1