drm/i915: Extract ringbuffer destroy & generalize alloc to take a ringbuf
More prep work: with Execlists, we are going to start creating a lot
of extra ringbuffers soon, so these functions are handy.
No functional changes.
v2: rename allocate/destroy_ring_buffer to alloc/destroy_ringbuffer_obj
because the name is more meaningful and to mirror a similar function in
the context world: i915_gem_alloc_context_obj(). Change suggested by Brad
Volkin.
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Oscar Mateo <oscar.mateo@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index e18ed05..40b17f2 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -1482,15 +1482,25 @@
return 0;
}
-static int allocate_ring_buffer(struct intel_engine_cs *ring)
+static void intel_destroy_ringbuffer_obj(struct intel_ringbuffer *ringbuf)
{
- struct drm_device *dev = ring->dev;
+ if (!ringbuf->obj)
+ return;
+
+ iounmap(ringbuf->virtual_start);
+ i915_gem_object_ggtt_unpin(ringbuf->obj);
+ drm_gem_object_unreference(&ringbuf->obj->base);
+ ringbuf->obj = NULL;
+}
+
+static int intel_alloc_ringbuffer_obj(struct drm_device *dev,
+ struct intel_ringbuffer *ringbuf)
+{
struct drm_i915_private *dev_priv = to_i915(dev);
- struct intel_ringbuffer *ringbuf = ring->buffer;
struct drm_i915_gem_object *obj;
int ret;
- if (intel_ring_initialized(ring))
+ if (ringbuf->obj)
return 0;
obj = NULL;
@@ -1562,7 +1572,7 @@
goto error;
}
- ret = allocate_ring_buffer(ring);
+ ret = intel_alloc_ringbuffer_obj(dev, ringbuf);
if (ret) {
DRM_ERROR("Failed to allocate ringbuffer %s: %d\n", ring->name, ret);
goto error;
@@ -1603,11 +1613,7 @@
intel_stop_ring_buffer(ring);
WARN_ON(!IS_GEN2(ring->dev) && (I915_READ_MODE(ring) & MODE_IDLE) == 0);
- iounmap(ringbuf->virtual_start);
-
- i915_gem_object_ggtt_unpin(ringbuf->obj);
- drm_gem_object_unreference(&ringbuf->obj->base);
- ringbuf->obj = NULL;
+ intel_destroy_ringbuffer_obj(ringbuf);
ring->preallocated_lazy_request = NULL;
ring->outstanding_lazy_seqno = 0;