drm/i915: do not export the instances of struct intel_ring_buffer

Introduce intel_init_render_ring_buffer(), intel_init_bsd_ring_buffer
for ring initialization.

Signed-off-by: Xiang, Haihao <haihao.xiang@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

3 files changed, 31 insertions, 16 deletions

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 325f52bc1401..7b33b4d5ebff 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -4496,28 +4496,18 @@ i915_gem_init_ringbuffer(struct drm_device *dev)
         drm_i915_private_t *dev_priv = dev->dev_private;
         int ret;
 
-        dev_priv->render_ring = render_ring;
-
-        if (!I915_NEED_GFX_HWS(dev)) {
-                dev_priv->render_ring.status_page.page_addr
-                        = dev_priv->status_page_dmah->vaddr;
-                memset(dev_priv->render_ring.status_page.page_addr,
-                                0, PAGE_SIZE);
-        }
-
         if (HAS_PIPE_CONTROL(dev)) {
                 ret = i915_gem_init_pipe_control(dev);
                 if (ret)
                         return ret;
         }
 
-        ret = intel_init_ring_buffer(dev, &dev_priv->render_ring);
+        ret = intel_init_render_ring_buffer(dev);
         if (ret)
                 goto cleanup_pipe_control;
 
         if (HAS_BSD(dev)) {
-                dev_priv->bsd_ring = bsd_ring;
-                ret = intel_init_ring_buffer(dev, &dev_priv->bsd_ring);
+                ret = intel_init_bsd_ring_buffer(dev);
                 if (ret)
                         goto cleanup_render_ring;
         }
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 45f66e289af1..178e2cea9835 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -793,7 +793,7 @@ void intel_fill_struct(struct drm_device *dev,
         intel_ring_advance(dev, ring);
 }
 
-struct intel_ring_buffer render_ring = {
+static struct intel_ring_buffer render_ring = {
         .name                   = "render ring",
         .id                     = RING_RENDER,
         .regs                   = {
@@ -831,7 +831,7 @@ struct intel_ring_buffer render_ring = {
 
 /* ring buffer for bit-stream decoder */
 
-struct intel_ring_buffer bsd_ring = {
+static struct intel_ring_buffer bsd_ring = {
         .name                   = "bsd ring",
         .id                     = RING_BSD,
         .regs                   = {
@@ -866,3 +866,28 @@ struct intel_ring_buffer bsd_ring = {
         .status_page            = {NULL, 0, NULL},
         .map                    = {0,}
 };
+
+int intel_init_render_ring_buffer(struct drm_device *dev)
+{
+        drm_i915_private_t *dev_priv = dev->dev_private;
+
+        dev_priv->render_ring = render_ring;
+
+        if (!I915_NEED_GFX_HWS(dev)) {
+                dev_priv->render_ring.status_page.page_addr
+                        = dev_priv->status_page_dmah->vaddr;
+                memset(dev_priv->render_ring.status_page.page_addr,
+                                0, PAGE_SIZE);
+        }
+
+        return intel_init_ring_buffer(dev, &dev_priv->render_ring);
+}
+
+int intel_init_bsd_ring_buffer(struct drm_device *dev)
+{
+        drm_i915_private_t *dev_priv = dev->dev_private;
+
+        dev_priv->bsd_ring = bsd_ring;
+
+        return intel_init_ring_buffer(dev, &dev_priv->bsd_ring);
+}
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h
index 8dc0e62b7d2a..5603d6e945e9 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.h
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.h
@@ -133,7 +133,7 @@ void intel_ring_advance(struct drm_device *dev,
 u32 intel_ring_get_seqno(struct drm_device *dev,
                 struct intel_ring_buffer *ring);
 
-extern struct intel_ring_buffer render_ring;
-extern struct intel_ring_buffer bsd_ring;
+int intel_init_render_ring_buffer(struct drm_device *dev);
+int intel_init_bsd_ring_buffer(struct drm_device *dev);
 
 #endif /* _INTEL_RINGBUFFER_H_ */