Revert "venus: remove vn_ring_wait_all"

This reverts commit 7253e61d9d.

Signed-off-by: Yiwei Zhang <zzyiwei@chromium.org>
Reviewed-by: Chia-I Wu <olvaffe@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14657>

src/virtio/vulkan/vn_instance.h

@@ -111,6 +111,13 @@ VkResult
 vn_instance_ring_submit(struct vn_instance *instance,
                         const struct vn_cs_encoder *cs);
 
+static inline void
+vn_instance_ring_wait(struct vn_instance *instance)
+{
+   struct vn_ring *ring = &instance->ring.ring;
+   vn_ring_wait_all(ring);
+}
+
 struct vn_instance_submit_command {
    /* empty command implies errors */
    struct vn_cs_encoder command;

src/virtio/vulkan/vn_ring.c

@@ -238,3 +238,12 @@ vn_ring_wait(const struct vn_ring *ring, uint32_t seqno)
 {
    vn_ring_wait_seqno(ring, seqno);
 }
+
+void
+vn_ring_wait_all(const struct vn_ring *ring)
+{
+   /* load from tail rather than ring->cur for atomicity */
+   const uint32_t pending_seqno =
+      atomic_load_explicit(ring->shared.tail, memory_order_relaxed);
+   vn_ring_wait(ring, pending_seqno);
+}

src/virtio/vulkan/vn_ring.h

@@ -99,4 +99,7 @@ vn_ring_submit(struct vn_ring *ring,
 void
 vn_ring_wait(const struct vn_ring *ring, uint32_t seqno);
 
+void
+vn_ring_wait_all(const struct vn_ring *ring);
+
 #endif /* VN_RING_H */