freedreno/drm/virtio: Limit guest handles passed to virtgpu

We only need to have virtgpu in the loop for shared buffers when
implicit sync is in play.  The rest of the time we can rely on userspace
fence waits.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21143>

src/freedreno/drm/virtio/virtio_pipe.c

@@ -122,9 +122,13 @@ virtio_pipe_wait(struct fd_pipe *pipe, const struct fd_fence *fence, uint64_t ti
 {
    MESA_TRACE_FUNC();
 
+   assert(fence->use_fence_fd);
+
    if (fence->use_fence_fd)
       return sync_wait(fence->fence_fd, timeout / 1000000);
 
+   /* TODO remove !use_fence_fd path */
+
    struct msm_ccmd_wait_fence_req req = {
          .hdr = MSM_CCMD(WAIT_FENCE, sizeof(req)),
          .queue_id = to_virtio_pipe(pipe)->queue_id,

src/freedreno/drm/virtio/virtio_ringbuffer.c

@@ -140,10 +140,12 @@ flush_submit_list(struct list_head *submit_list)
       guest_handles = malloc(fd_submit->nr_bos * sizeof(guest_handles[0]));
    }
 
+   uint32_t nr_guest_handles = 0;
    for (unsigned i = 0; i < fd_submit->nr_bos; i++) {
       struct virtio_bo *virtio_bo = to_virtio_bo(fd_submit->bos[i]);
 
-      guest_handles[i] = virtio_bo->base.handle;
+      if (virtio_bo->base.alloc_flags & FD_BO_SHARED)
+         guest_handles[nr_guest_handles++] = virtio_bo->base.handle;
 
       submit_bos[i].flags = fd_submit->bos[i]->reloc_flags;
       submit_bos[i].handle = virtio_bo->res_id;
@@ -185,9 +187,10 @@ flush_submit_list(struct list_head *submit_list)
 
    if (pipe->no_implicit_sync) {
       req->flags |= MSM_SUBMIT_NO_IMPLICIT;
+      nr_guest_handles = 0;
    }
 
-   virtio_execbuf_fenced(dev, &req->hdr, guest_handles, req->nr_bos,
+   virtio_execbuf_fenced(dev, &req->hdr, guest_handles, nr_guest_handles,
                          fd_submit->in_fence_fd, &out_fence->fence_fd,
                          virtio_pipe->ring_idx);