qxl: add ring prep code for s/r

This prepare the ring code for s/r additions, the release ring will need
reinitialising.

Signed-off-by: Dave Airlie <airlied@redhat.com>

2 files changed, 9 insertions, 2 deletions

diff --git a/drivers/gpu/drm/qxl/qxl_cmd.c b/drivers/gpu/drm/qxl/qxl_cmd.c
index 92cf1afd60e5..93c2f2cceb51 100644
--- a/drivers/gpu/drm/qxl/qxl_cmd.c
+++ b/drivers/gpu/drm/qxl/qxl_cmd.c
@@ -49,6 +49,11 @@ void qxl_ring_free(struct qxl_ring *ring)
         kfree(ring);
 }
 
+void qxl_ring_init_hdr(struct qxl_ring *ring)
+{
+        ring->ring->header.notify_on_prod = ring->n_elements;
+}
+
 struct qxl_ring *
 qxl_ring_create(struct qxl_ring_header *header,
                 int element_size,
@@ -69,7 +74,7 @@ qxl_ring_create(struct qxl_ring_header *header,
         ring->prod_notify = prod_notify;
         ring->push_event = push_event;
         if (set_prod_notify)
-                header->notify_on_prod = ring->n_elements;
+                qxl_ring_init_hdr(ring);
         spin_lock_init(&ring->lock);
         return ring;
 }
@@ -87,7 +92,7 @@ static int qxl_check_header(struct qxl_ring *ring)
         return ret;
 }
 
-static int qxl_check_idle(struct qxl_ring *ring)
+int qxl_check_idle(struct qxl_ring *ring)
 {
         int ret;
         struct qxl_ring_header *header = &(ring->ring->header);
diff --git a/drivers/gpu/drm/qxl/qxl_drv.h b/drivers/gpu/drm/qxl/qxl_drv.h
index 056330e5fecf..aec9f1f9c814 100644
--- a/drivers/gpu/drm/qxl/qxl_drv.h
+++ b/drivers/gpu/drm/qxl/qxl_drv.h
@@ -340,6 +340,8 @@ struct qxl_ring *qxl_ring_create(struct qxl_ring_header *header,
                                  bool set_prod_notify,
                                  wait_queue_head_t *push_event);
 void qxl_ring_free(struct qxl_ring *ring);
+void qxl_ring_init_hdr(struct qxl_ring *ring);
+int qxl_check_idle(struct qxl_ring *ring);
 
 static inline void *
 qxl_fb_virtual_address(struct qxl_device *qdev, unsigned long physical)