drm/i915: Wrap vma->pin_count accessors with small inline helpers

In the next few patches, the VMA pinning API is overhauled and to reduce
the churn we pull out the update to the accessors into a prep patch.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1470324762-2545-14-git-send-email-chris@chris-wilson.co.uk

drivers/gpu/drm/i915/i915_debugfs.c

@@ -168,7 +168,7 @@ describe_obj(struct seq_file *m, struct drm_i915_gem_object *obj)
 	if (obj->base.name)
 		seq_printf(m, " (name: %d)", obj->base.name);
 	list_for_each_entry(vma, &obj->vma_list, obj_link) {
-		if (vma->pin_count > 0)
+		if (i915_vma_is_pinned(vma))
 			pin_count++;
 	}
 	seq_printf(m, " (pinned x %d)", pin_count);

drivers/gpu/drm/i915/i915_gem.c

@@ -153,10 +153,10 @@ i915_gem_get_aperture_ioctl(struct drm_device *dev, void *data,
 	pinned = 0;
 	mutex_lock(&dev->struct_mutex);
 	list_for_each_entry(vma, &ggtt->base.active_list, vm_link)
-		if (vma->pin_count)
+		if (i915_vma_is_pinned(vma))
 			pinned += vma->node.size;
 	list_for_each_entry(vma, &ggtt->base.inactive_list, vm_link)
-		if (vma->pin_count)
+		if (i915_vma_is_pinned(vma))
 			pinned += vma->node.size;
 	mutex_unlock(&dev->struct_mutex);
 
@@ -2809,7 +2809,7 @@ static void i915_gem_object_finish_gtt(struct drm_i915_gem_object *obj)
 
 static void __i915_vma_iounmap(struct i915_vma *vma)
 {
-	GEM_BUG_ON(vma->pin_count);
+	GEM_BUG_ON(i915_vma_is_pinned(vma));
 
 	if (vma->iomap == NULL)
 		return;
@@ -2836,7 +2836,7 @@ int i915_vma_unbind(struct i915_vma *vma)
 		 * take a pin on the vma so that the second unbind is
 		 * aborted.
 		 */
-		vma->pin_count++;
+		__i915_vma_pin(vma);
 
 		for_each_active(active, idx) {
 			ret = i915_gem_active_retire(&vma->last_read[idx],
@@ -2845,14 +2845,14 @@ int i915_vma_unbind(struct i915_vma *vma)
 				break;
 		}
 
-		vma->pin_count--;
+		__i915_vma_unpin(vma);
 		if (ret)
 			return ret;
 
 		GEM_BUG_ON(i915_vma_is_active(vma));
 	}
 
-	if (vma->pin_count)
+	if (i915_vma_is_pinned(vma))
 		return -EBUSY;
 
 	if (!drm_mm_node_allocated(&vma->node))
@@ -3297,7 +3297,7 @@ restart:
 		if (!drm_mm_node_allocated(&vma->node))
 			continue;
 
-		if (vma->pin_count) {
+		if (i915_vma_is_pinned(vma)) {
 			DRM_DEBUG("can not change the cache level of pinned objects\n");
 			return -EBUSY;
 		}
@@ -3734,11 +3734,11 @@ i915_gem_object_do_pin(struct drm_i915_gem_object *obj,
 			  i915_gem_obj_to_vma(obj, vm);
 
 	if (vma) {
-		if (WARN_ON(vma->pin_count == DRM_I915_GEM_OBJECT_MAX_PIN_COUNT))
+		if (WARN_ON(i915_vma_pin_count(vma) == DRM_I915_GEM_OBJECT_MAX_PIN_COUNT))
 			return -EBUSY;
 
 		if (i915_vma_misplaced(vma, size, alignment, flags)) {
-			WARN(vma->pin_count,
+			WARN(i915_vma_is_pinned(vma),
 			     "bo is already pinned in %s with incorrect alignment:"
 			     " offset=%08x %08x, req.alignment=%llx, req.map_and_fenceable=%d,"
 			     " obj->map_and_fenceable=%d\n",
@@ -3776,7 +3776,7 @@ i915_gem_object_do_pin(struct drm_i915_gem_object *obj,
 
 	GEM_BUG_ON(i915_vma_misplaced(vma, size, alignment, flags));
 
-	vma->pin_count++;
+	__i915_vma_pin(vma);
 	return 0;
 }
 
@@ -3815,10 +3815,10 @@ i915_gem_object_ggtt_unpin_view(struct drm_i915_gem_object *obj,
 {
 	struct i915_vma *vma = i915_gem_obj_to_ggtt_view(obj, view);
 
-	WARN_ON(vma->pin_count == 0);
+	WARN_ON(!i915_vma_is_pinned(vma));
 	WARN_ON(!i915_gem_obj_ggtt_bound_view(obj, view));
 
-	--vma->pin_count;
+	__i915_vma_unpin(vma);
 }
 
 int
@@ -4686,7 +4686,7 @@ bool i915_gem_obj_is_pinned(struct drm_i915_gem_object *obj)
 {
 	struct i915_vma *vma;
 	list_for_each_entry(vma, &obj->vma_list, obj_link)
-		if (vma->pin_count > 0)
+		if (i915_vma_is_pinned(vma))
 			return true;
 
 	return false;

drivers/gpu/drm/i915/i915_gem_evict.c

@@ -49,7 +49,7 @@ gpu_is_idle(struct drm_i915_private *dev_priv)
 static bool
 mark_free(struct i915_vma *vma, struct list_head *unwind)
 {
-	if (vma->pin_count)
+	if (i915_vma_is_pinned(vma))
 		return false;
 
 	if (WARN_ON(!list_empty(&vma->exec_list)))
@@ -183,7 +183,7 @@ found:
 	 */
 	list_for_each_entry_safe(vma, next, &eviction_list, exec_list) {
 		if (drm_mm_scan_remove_block(&vma->node))
-			vma->pin_count++;
+			__i915_vma_pin(vma);
 		else
 			list_del_init(&vma->exec_list);
 	}
@@ -195,7 +195,7 @@ found:
 				       exec_list);
 
 		list_del_init(&vma->exec_list);
-		vma->pin_count--;
+		__i915_vma_unpin(vma);
 		if (ret == 0)
 			ret = i915_vma_unbind(vma);
 	}
@@ -220,8 +220,8 @@ i915_gem_evict_for_vma(struct i915_vma *target)
 
 		vma = container_of(node, typeof(*vma), node);
 
-		if (vma->pin_count) {
-			if (!vma->exec_entry || (vma->pin_count > 1))
+		if (i915_vma_is_pinned(vma)) {
+			if (!vma->exec_entry || i915_vma_pin_count(vma) > 1)
 				/* Object is pinned for some other use */
 				return -EBUSY;
 
@@ -281,7 +281,7 @@ int i915_gem_evict_vm(struct i915_address_space *vm, bool do_idle)
 	}
 
 	list_for_each_entry_safe(vma, next, &vm->inactive_list, vm_link)
-		if (vma->pin_count == 0)
+		if (!i915_vma_is_pinned(vma))
 			WARN_ON(i915_vma_unbind(vma));
 
 	return 0;

drivers/gpu/drm/i915/i915_gem_execbuffer.c

@@ -261,7 +261,7 @@ i915_gem_execbuffer_unreserve_vma(struct i915_vma *vma)
 		i915_gem_object_unpin_fence(obj);
 
 	if (entry->flags & __EXEC_OBJECT_HAS_PIN)
-		vma->pin_count--;
+		__i915_vma_unpin(vma);
 
 	entry->flags &= ~(__EXEC_OBJECT_HAS_FENCE | __EXEC_OBJECT_HAS_PIN);
 }

drivers/gpu/drm/i915/i915_gem_fence.c

@@ -431,7 +431,7 @@ i915_gem_object_pin_fence(struct drm_i915_gem_object *obj)
 
 		WARN_ON(!ggtt_vma ||
 			dev_priv->fence_regs[obj->fence_reg].pin_count >
-			ggtt_vma->pin_count);
+			i915_vma_pin_count(ggtt_vma));
 		dev_priv->fence_regs[obj->fence_reg].pin_count++;
 		return true;
 	} else

drivers/gpu/drm/i915/i915_gem_gtt.c

@@ -3334,7 +3334,7 @@ i915_vma_retire(struct i915_gem_active *active,
 		return;
 
 	list_move_tail(&vma->vm_link, &vma->vm->inactive_list);
-	if (unlikely(vma->closed && !vma->pin_count))
+	if (unlikely(vma->closed && !i915_vma_is_pinned(vma)))
 		WARN_ON(i915_vma_unbind(vma));
 }
 
@@ -3357,7 +3357,7 @@ void i915_vma_close(struct i915_vma *vma)
 	vma->closed = true;
 
 	list_del_init(&vma->obj_link);
-	if (!i915_vma_is_active(vma) && !vma->pin_count)
+	if (!i915_vma_is_active(vma) && !i915_vma_is_pinned(vma))
 		WARN_ON(i915_vma_unbind(vma));
 }
 
@@ -3666,12 +3666,12 @@ int i915_vma_bind(struct i915_vma *vma, enum i915_cache_level cache_level,
 
 	if (vma->bound == 0 && vma->vm->allocate_va_range) {
 		/* XXX: i915_vma_pin() will fix this +- hack */
-		vma->pin_count++;
+		__i915_vma_pin(vma);
 		trace_i915_va_alloc(vma);
 		ret = vma->vm->allocate_va_range(vma->vm,
 						 vma->node.start,
 						 vma->node.size);
-		vma->pin_count--;
+		__i915_vma_unpin(vma);
 		if (ret)
 			return ret;
 	}
@@ -3707,6 +3707,6 @@ void __iomem *i915_vma_pin_iomap(struct i915_vma *vma)
 		vma->iomap = ptr;
 	}
 
-	vma->pin_count++;
+	__i915_vma_pin(vma);
 	return ptr;
 }

drivers/gpu/drm/i915/i915_gem_gtt.h

@@ -609,6 +609,34 @@ i915_ggtt_view_equal(const struct i915_ggtt_view *a,
 	return true;
 }
 
+static inline int i915_vma_pin_count(const struct i915_vma *vma)
+{
+	return vma->pin_count;
+}
+
+static inline bool i915_vma_is_pinned(const struct i915_vma *vma)
+{
+	return i915_vma_pin_count(vma);
+}
+
+static inline void __i915_vma_pin(struct i915_vma *vma)
+{
+	vma->pin_count++;
+	GEM_BUG_ON(!i915_vma_is_pinned(vma));
+}
+
+static inline void __i915_vma_unpin(struct i915_vma *vma)
+{
+	GEM_BUG_ON(!i915_vma_is_pinned(vma));
+	vma->pin_count--;
+}
+
+static inline void i915_vma_unpin(struct i915_vma *vma)
+{
+	GEM_BUG_ON(!drm_mm_node_allocated(&vma->node));
+	__i915_vma_unpin(vma);
+}
+
 /**
  * i915_vma_pin_iomap - calls ioremap_wc to map the GGTT VMA via the aperture
  * @vma: VMA to iomap
@@ -637,9 +665,8 @@ void __iomem *i915_vma_pin_iomap(struct i915_vma *vma);
 static inline void i915_vma_unpin_iomap(struct i915_vma *vma)
 {
 	lockdep_assert_held(&vma->vm->dev->struct_mutex);
-	GEM_BUG_ON(vma->pin_count == 0);
 	GEM_BUG_ON(vma->iomap == NULL);
-	vma->pin_count--;
+	i915_vma_unpin(vma);
 }
 
 #endif

drivers/gpu/drm/i915/i915_gpu_error.c

@@ -818,7 +818,7 @@ static u32 capture_pinned_bo(struct drm_i915_error_buffer *err,
 			break;
 
 		list_for_each_entry(vma, &obj->vma_list, obj_link)
-			if (vma->vm == vm && vma->pin_count > 0)
+			if (vma->vm == vm && i915_vma_is_pinned(vma))
 				capture_bo(err++, vma);
 	}
 
@@ -1230,7 +1230,7 @@ static void i915_gem_capture_vm(struct drm_i915_private *dev_priv,
 
 	list_for_each_entry(obj, &dev_priv->mm.bound_list, global_list) {
 		list_for_each_entry(vma, &obj->vma_list, obj_link)
-			if (vma->vm == vm && vma->pin_count > 0)
+			if (vma->vm == vm && i915_vma_is_pinned(vma))
 				i++;
 	}
 	error->pinned_bo_count[ndx] = i - error->active_bo_count[ndx];