[PATCH 24/26] vfio-user: pci reset

[John Levon]

From: Jagannathan Raman <jag.raman@oracle.com>

Message to tell the server to reset the 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/user-pci.c | 15 +++++++++++++++
 hw/vfio/user.c     | 12 ++++++++++++
 hw/vfio/user.h     |  1 +
 3 files changed, 28 insertions(+)

diff --git a/hw/vfio/user-pci.c b/hw/vfio/user-pci.c
index 8cd397b75a..84802556e9 100644
--- a/hw/vfio/user-pci.c
+++ b/hw/vfio/user-pci.c
@@ -393,6 +393,20 @@ 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 const Property vfio_user_pci_dev_properties[] = {
     DEFINE_PROP_STRING("socket", VFIOUserPCIDevice, sock_name),
     DEFINE_PROP_BOOL("no-direct-dma", VFIOUserPCIDevice, no_direct_dma, false),
@@ -405,6 +419,7 @@ static void vfio_user_pci_dev_class_init(ObjectClass 
*klass, 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;
diff --git a/hw/vfio/user.c b/hw/vfio/user.c
index 6f0358bd8f..9fba36e196 100644
--- a/hw/vfio/user.c
+++ b/hw/vfio/user.c
@@ -1491,6 +1491,18 @@ static int vfio_user_region_write(VFIOUserProxy *proxy, 
uint8_t index,
     return ret;
 }
 
+void vfio_user_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);
+    }
+}
+
 
 /*
  * Socket-based io_ops
diff --git a/hw/vfio/user.h b/hw/vfio/user.h
index fa6bc9a9d6..d9aa1759df 100644
--- a/hw/vfio/user.h
+++ b/hw/vfio/user.h
@@ -119,5 +119,6 @@ void vfio_user_send_wait(VFIOUserProxy *proxy, VFIOUserHdr 
*hdr,
 void vfio_user_send_reply(VFIOUserProxy *proxy, VFIOUserHdr *hdr, int size);
 void vfio_user_send_error(VFIOUserProxy *proxy, VFIOUserHdr *hdr, int error);
 void vfio_user_putfds(VFIOUserMsg *msg);
+void vfio_user_reset(VFIOUserProxy *proxy);
 
 #endif /* VFIO_USER_H */
-- 
2.34.1