drm/i915: Move the eviction logic to its own file.

The eviction code is the gnarly underbelly of memory management, and is
clearer if kept separated from the normal domain management in GEM.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Eric Anholt <eric@anholt.net>

1 files changed, 2 insertions, 229 deletions

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 45b998218d0c..b5a7b00264a6 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -49,9 +49,6 @@ static int i915_gem_object_wait_rendering(struct drm_gem_object *obj);
 static int i915_gem_object_bind_to_gtt(struct drm_gem_object *obj,
 					   unsigned alignment);
 static void i915_gem_clear_fence_reg(struct drm_gem_object *obj);
-static int i915_gem_evict_something(struct drm_device *dev, int min_size,
-				    unsigned alignment);
-static int i915_gem_evict_from_inactive_list(struct drm_device *dev);
 static int i915_gem_phys_pwrite(struct drm_device *dev, struct drm_gem_object *obj,
 				struct drm_i915_gem_pwrite *args,
 				struct drm_file *file_priv);
@@ -1885,19 +1882,6 @@ i915_gem_flush(struct drm_device *dev,
 				flush_domains);
 }
 
-static void
-i915_gem_flush_ring(struct drm_device *dev,
-	       uint32_t invalidate_domains,
-	       uint32_t flush_domains,
-	       struct intel_ring_buffer *ring)
-{
-	if (flush_domains & I915_GEM_DOMAIN_CPU)
-		drm_agp_chipset_flush(dev);
-	ring->flush(dev, ring,
-			invalidate_domains,
-			flush_domains);
-}
-
 /**
  * Ensures that all rendering to the object has completed and the object is
  * safe to unbind from the GTT or access from the CPU.
@@ -2008,53 +1992,7 @@ i915_gem_object_unbind(struct drm_gem_object *obj)
 	return ret;
 }
 
-static int
-i915_gem_scan_inactive_list_and_evict(struct drm_device *dev, int min_size,
-				      unsigned alignment, int *found)
-{
-	drm_i915_private_t *dev_priv = dev->dev_private;
-	struct drm_gem_object *obj;
-	struct drm_i915_gem_object *obj_priv;
-	struct drm_gem_object *best = NULL;
-	struct drm_gem_object *first = NULL;
-
-	/* Try to find the smallest clean object */
-	list_for_each_entry(obj_priv, &dev_priv->mm.inactive_list, list) {
-		struct drm_gem_object *obj = &obj_priv->base;
-		if (obj->size >= min_size) {
-			if ((!obj_priv->dirty ||
-			     i915_gem_object_is_purgeable(obj_priv)) &&
-			    (!best || obj->size < best->size)) {
-				best = obj;
-				if (best->size == min_size)
-					break;
-			}
-			if (!first)
-			    first = obj;
-		}
-	}
-
-	obj = best ? best : first;
-
-	if (!obj) {
-		*found = 0;
-		return 0;
-	}
-
-	*found = 1;
-
-#if WATCH_LRU
-	DRM_INFO("%s: evicting %p\n", __func__, obj);
-#endif
-	obj_priv = to_intel_bo(obj);
-	BUG_ON(obj_priv->pin_count != 0);
-	BUG_ON(obj_priv->active);
-
-	/* Wait on the rendering and unbind the buffer. */
-	return i915_gem_object_unbind(obj);
-}
-
-static int
+int
 i915_gpu_idle(struct drm_device *dev)
 {
 	drm_i915_private_t *dev_priv = dev->dev_private;
@@ -2095,147 +2033,6 @@ i915_gpu_idle(struct drm_device *dev)
 	return ret;
 }
 
-static int
-i915_gem_evict_everything(struct drm_device *dev)
-{
-	drm_i915_private_t *dev_priv = dev->dev_private;
-	int ret;
-	bool lists_empty;
-
-	spin_lock(&dev_priv->mm.active_list_lock);
-	lists_empty = (list_empty(&dev_priv->mm.inactive_list) &&
-		       list_empty(&dev_priv->mm.flushing_list) &&
-		       list_empty(&dev_priv->render_ring.active_list) &&
-		       (!HAS_BSD(dev)
-			|| list_empty(&dev_priv->bsd_ring.active_list)));
-	spin_unlock(&dev_priv->mm.active_list_lock);
-
-	if (lists_empty)
-		return -ENOSPC;
-
-	/* Flush everything (on to the inactive lists) and evict */
-	ret = i915_gpu_idle(dev);
-	if (ret)
-		return ret;
-
-	BUG_ON(!list_empty(&dev_priv->mm.flushing_list));
-
-	ret = i915_gem_evict_from_inactive_list(dev);
-	if (ret)
-		return ret;
-
-	spin_lock(&dev_priv->mm.active_list_lock);
-	lists_empty = (list_empty(&dev_priv->mm.inactive_list) &&
-		       list_empty(&dev_priv->mm.flushing_list) &&
-		       list_empty(&dev_priv->render_ring.active_list) &&
-		       (!HAS_BSD(dev)
-			|| list_empty(&dev_priv->bsd_ring.active_list)));
-	spin_unlock(&dev_priv->mm.active_list_lock);
-	BUG_ON(!lists_empty);
-
-	return 0;
-}
-
-static int
-i915_gem_evict_something(struct drm_device *dev,
-			 int min_size, unsigned alignment)
-{
-	drm_i915_private_t *dev_priv = dev->dev_private;
-	int ret, found;
-
-	struct intel_ring_buffer *render_ring = &dev_priv->render_ring;
-	struct intel_ring_buffer *bsd_ring = &dev_priv->bsd_ring;
-	for (;;) {
-		i915_gem_retire_requests(dev);
-
-		/* If there's an inactive buffer available now, grab it
-		 * and be done.
-		 */
-		ret = i915_gem_scan_inactive_list_and_evict(dev, min_size,
-							    alignment,
-							    &found);
-		if (found)
-			return ret;
-
-		/* If we didn't get anything, but the ring is still processing
-		 * things, wait for the next to finish and hopefully leave us
-		 * a buffer to evict.
-		 */
-		if (!list_empty(&render_ring->request_list)) {
-			struct drm_i915_gem_request *request;
-
-			request = list_first_entry(&render_ring->request_list,
-						   struct drm_i915_gem_request,
-						   list);
-
-			ret = i915_wait_request(dev,
-					request->seqno, request->ring);
-			if (ret)
-				return ret;
-
-			continue;
-		}
-
-		if (HAS_BSD(dev) && !list_empty(&bsd_ring->request_list)) {
-			struct drm_i915_gem_request *request;
-
-			request = list_first_entry(&bsd_ring->request_list,
-						   struct drm_i915_gem_request,
-						   list);
-
-			ret = i915_wait_request(dev,
-					request->seqno, request->ring);
-			if (ret)
-				return ret;
-
-			continue;
-		}
-
-		/* If we didn't have anything on the request list but there
-		 * are buffers awaiting a flush, emit one and try again.
-		 * When we wait on it, those buffers waiting for that flush
-		 * will get moved to inactive.
-		 */
-		if (!list_empty(&dev_priv->mm.flushing_list)) {
-			struct drm_gem_object *obj = NULL;
-			struct drm_i915_gem_object *obj_priv;
-
-			/* Find an object that we can immediately reuse */
-			list_for_each_entry(obj_priv, &dev_priv->mm.flushing_list, list) {
-				obj = &obj_priv->base;
-				if (obj->size >= min_size)
-					break;
-
-				obj = NULL;
-			}
-
-			if (obj != NULL) {
-				uint32_t seqno;
-
-				i915_gem_flush_ring(dev,
-					       obj->write_domain,
-					       obj->write_domain,
-					       obj_priv->ring);
-				seqno = i915_add_request(dev, NULL,
-						obj->write_domain,
-						obj_priv->ring);
-				if (seqno == 0)
-					return -ENOMEM;
-				continue;
-			}
-		}
-
-		/* If we didn't do any of the above, there's no single buffer
-		 * large enough to swap out for the new one, so just evict
-		 * everything and start again. (This should be rare.)
-		 */
-		if (!list_empty (&dev_priv->mm.inactive_list))
-			return i915_gem_evict_from_inactive_list(dev);
-		else
-			return i915_gem_evict_everything(dev);
-	}
-}
-
 int
 i915_gem_object_get_pages(struct drm_gem_object *obj,
 			  gfp_t gfpmask)
@@ -4548,30 +4345,6 @@ void i915_gem_free_object(struct drm_gem_object *obj)
 	i915_gem_free_object_tail(obj);
 }
 
-/** Unbinds all inactive objects. */
-static int
-i915_gem_evict_from_inactive_list(struct drm_device *dev)
-{
-	drm_i915_private_t *dev_priv = dev->dev_private;
-
-	while (!list_empty(&dev_priv->mm.inactive_list)) {
-		struct drm_gem_object *obj;
-		int ret;
-
-		obj = &list_first_entry(&dev_priv->mm.inactive_list,
-					struct drm_i915_gem_object,
-					list)->base;
-
-		ret = i915_gem_object_unbind(obj);
-		if (ret != 0) {
-			DRM_ERROR("Error unbinding object: %d\n", ret);
-			return ret;
-		}
-	}
-
-	return 0;
-}
-
 int
 i915_gem_idle(struct drm_device *dev)
 {
@@ -4596,7 +4369,7 @@ i915_gem_idle(struct drm_device *dev)
 
 	/* Under UMS, be paranoid and evict. */
 	if (!drm_core_check_feature(dev, DRIVER_MODESET)) {
-		ret = i915_gem_evict_from_inactive_list(dev);
+		ret = i915_gem_evict_inactive(dev);
 		if (ret) {
 			mutex_unlock(&dev->struct_mutex);
 			return ret;