drm/msm: wire up vmap shrinker

Signed-off-by: Rob Clark <robdclark@gmail.com>

1 files changed, 20 insertions, 5 deletions

diff --git a/drivers/gpu/drm/msm/msm_gem.c b/drivers/gpu/drm/msm/msm_gem.c
index c05fc1d0dce7..886cfe0383ff 100644
--- a/drivers/gpu/drm/msm/msm_gem.c
+++ b/drivers/gpu/drm/msm/msm_gem.c
@@ -421,6 +421,7 @@ void *msm_gem_get_vaddr_locked(struct drm_gem_object *obj)
 		if (msm_obj->vaddr == NULL)
 			return ERR_PTR(-ENOMEM);
 	}
+	msm_obj->vmap_count++;
 	return msm_obj->vaddr;
 }
 
@@ -435,13 +436,17 @@ void *msm_gem_get_vaddr(struct drm_gem_object *obj)
 
 void msm_gem_put_vaddr_locked(struct drm_gem_object *obj)
 {
+	struct msm_gem_object *msm_obj = to_msm_bo(obj);
 	WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex));
-	/* no-op for now */
+	WARN_ON(msm_obj->vmap_count < 1);
+	msm_obj->vmap_count--;
 }
 
 void msm_gem_put_vaddr(struct drm_gem_object *obj)
 {
-	/* no-op for now */
+	mutex_lock(&obj->dev->struct_mutex);
+	msm_gem_put_vaddr_locked(obj);
+	mutex_unlock(&obj->dev->struct_mutex);
 }
 
 /* Update madvise status, returns true if not purged, else
@@ -470,8 +475,7 @@ void msm_gem_purge(struct drm_gem_object *obj)
 
 	put_iova(obj);
 
-	vunmap(msm_obj->vaddr);
-	msm_obj->vaddr = NULL;
+	msm_gem_vunmap(obj);
 
 	put_pages(obj);
 
@@ -491,6 +495,17 @@ void msm_gem_purge(struct drm_gem_object *obj)
 			0, (loff_t)-1);
 }
 
+void msm_gem_vunmap(struct drm_gem_object *obj)
+{
+	struct msm_gem_object *msm_obj = to_msm_bo(obj);
+
+	if (!msm_obj->vaddr || WARN_ON(!is_vunmapable(msm_obj)))
+		return;
+
+	vunmap(msm_obj->vaddr);
+	msm_obj->vaddr = NULL;
+}
+
 /* must be called before _move_to_active().. */
 int msm_gem_sync_object(struct drm_gem_object *obj,
 		struct msm_fence_context *fctx, bool exclusive)
@@ -694,7 +709,7 @@ void msm_gem_free_object(struct drm_gem_object *obj)
 
 		drm_prime_gem_destroy(obj, msm_obj->sgt);
 	} else {
-		vunmap(msm_obj->vaddr);
+		msm_gem_vunmap(obj);
 		put_pages(obj);
 	}