vkr: handle device lost in vkr_context_submit_fence

Mark the sync and add it to the pending list as usual on
VK_ERROR_DEVICE_LOST.  This guarantees that syncs are still retired in
order.

Part-of: <https://gitlab.freedesktop.org/virgl/virglrenderer/-/merge_requests/723>

src/venus/vkr_context.c

@@ -141,7 +141,9 @@ vkr_context_submit_fence_locked(struct virgl_context *base,
       return -ENOMEM;
 
    result = vkQueueSubmit(queue->base.handle.queue, 0, NULL, sync->fence);
-   if (result != VK_SUCCESS) {
+   if (result == VK_ERROR_DEVICE_LOST) {
+      sync->device_lost = true;
+   } else if (result != VK_SUCCESS) {
       vkr_device_free_queue_sync(dev, sync);
       return -1;
    }

src/venus/vkr_queue.c

@@ -53,6 +53,7 @@ vkr_device_alloc_queue_sync(struct vkr_device *dev,
       vkResetFences(dev->base.handle.device, 1, &sync->fence);
    }
 
+   sync->device_lost = false;
    sync->flags = fence_flags;
    sync->queue_id = queue_id;
    sync->fence_cookie = fence_cookie;
@@ -101,9 +102,11 @@ vkr_queue_get_signaled_syncs(struct vkr_queue *queue,
       mtx_unlock(&queue->mutex);
    } else {
       LIST_FOR_EACH_ENTRY_SAFE (sync, tmp, &queue->pending_syncs, head) {
+         if (!sync->device_lost) {
             VkResult result = vkGetFenceStatus(dev->base.handle.device, sync->fence);
             if (result == VK_NOT_READY)
                break;
+         }
 
          bool is_last_sync = sync->head.next == &queue->pending_syncs;
 
@@ -201,8 +204,13 @@ vkr_queue_thread(void *arg)
 
       mtx_unlock(&queue->mutex);
 
-      VkResult result =
+      VkResult result;
-         vkWaitForFences(dev->base.handle.device, 1, &sync->fence, true, ns_per_sec * 3);
+      if (sync->device_lost) {
+         result = VK_ERROR_DEVICE_LOST;
+      } else {
+         result = vkWaitForFences(dev->base.handle.device, 1, &sync->fence, true,
+                                  ns_per_sec * 3);
+      }
 
       mtx_lock(&queue->mutex);
 

src/venus/vkr_queue.h

@@ -10,6 +10,7 @@
 
 struct vkr_queue_sync {
    VkFence fence;
+   bool device_lost;
 
    uint32_t flags;
    uint64_t queue_id;