diff --git a/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c b/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c
index 018d02cc4af5..85528eeaacbc 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c
@@ -10,6 +10,7 @@
 
 #include "i915_drv.h"
 #include "i915_gem_lmem.h"
+#include "i915_gem_mman.h"
 #include "i915_gem_object.h"
 #include "i915_scatterlist.h"
 
@@ -105,7 +106,41 @@ static void i915_gem_dmabuf_vunmap(struct dma_buf *dma_buf, struct dma_buf_map *
 	i915_gem_object_unpin_map(obj);
 }
 
-static int i915_gem_dmabuf_mmap(struct dma_buf *dma_buf, struct vm_area_struct *vma)
+/**
+ * i915_gem_dmabuf_update_vma - Setup VMA information for exported LMEM
+ * objects
+ * @obj: valid LMEM object
+ * @vma: va;od vma
+ *
+ * NOTE: on success, the final _object_put() will be done by the VMA
+ * vm_close() callback.
+ */
+static int i915_gem_dmabuf_update_vma(struct drm_i915_gem_object *obj,
+				      struct vm_area_struct *vma)
+{
+	struct i915_mmap_offset *mmo;
+	int err;
+
+	i915_gem_object_get(obj);
+	mmo = i915_gem_mmap_offset_attach(obj, I915_MMAP_TYPE_WC, NULL);
+	if (IS_ERR(mmo)) {
+		err = PTR_ERR(mmo);
+		goto out;
+	}
+
+	err = i915_gem_update_vma_info(obj, mmo, vma);
+	if (err)
+		goto out;
+
+	return 0;
+
+out:
+	i915_gem_object_put(obj);
+	return err;
+}
+
+static int i915_gem_dmabuf_mmap(struct dma_buf *dma_buf,
+				struct vm_area_struct *vma)
 {
 	struct drm_i915_gem_object *obj = dma_buf_to_obj(dma_buf);
 	int ret;
@@ -113,16 +148,20 @@ static int i915_gem_dmabuf_mmap(struct dma_buf *dma_buf, struct vm_area_struct *
 	if (obj->base.size < vma->vm_end - vma->vm_start)
 		return -EINVAL;
 
-	if (!obj->base.filp)
-		return -ENODEV;
+	/* shmem */
+	if (obj->base.filp) {
+		ret = call_mmap(obj->base.filp, vma);
+		if (ret)
+			return ret;
 
-	ret = call_mmap(obj->base.filp, vma);
-	if (ret)
-		return ret;
+		vma_set_file(vma, obj->base.filp);
+		return 0;
+	}
 
-	vma_set_file(vma, obj->base.filp);
+	if (i915_gem_object_is_lmem(obj))
+		return i915_gem_dmabuf_update_vma(obj, vma);
 
-	return 0;
+	return -ENODEV;
 }
 
 static int i915_gem_begin_cpu_access(struct dma_buf *dma_buf, enum dma_data_direction direction)
@@ -254,10 +293,6 @@ struct drm_gem_object *i915_gem_prime_import(struct drm_device *dev,
 			 */
 			return &i915_gem_object_get(obj)->base;
 		}
-
-		/* not our device, but still a i915 object? */
-		if (i915_gem_object_is_lmem(obj))
-			return ERR_PTR(-ENOTSUPP);
 	}
 
 	/* need to attach */
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_mman.c b/drivers/gpu/drm/i915/gem/i915_gem_mman.c
index 4e8a05c35252..33ccd4d665d4 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_mman.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_mman.c
@@ -620,10 +620,10 @@ insert_mmo(struct drm_i915_gem_object *obj, struct i915_mmap_offset *mmo)
 	return mmo;
 }
 
-static struct i915_mmap_offset *
-mmap_offset_attach(struct drm_i915_gem_object *obj,
-		   enum i915_mmap_type mmap_type,
-		   struct drm_file *file)
+struct i915_mmap_offset *
+i915_gem_mmap_offset_attach(struct drm_i915_gem_object *obj,
+			    enum i915_mmap_type mmap_type,
+			    struct drm_file *file)
 {
 	struct drm_i915_private *i915 = to_i915(obj->base.dev);
 	struct i915_mmap_offset *mmo;
@@ -696,7 +696,7 @@ __assign_mmap_offset(struct drm_file *file,
 		goto out;
 	}
 
-	mmo = mmap_offset_attach(obj, mmap_type, file);
+	mmo = i915_gem_mmap_offset_attach(obj, mmap_type, file);
 	if (IS_ERR(mmo)) {
 		err = PTR_ERR(mmo);
 		goto out;
@@ -867,56 +867,22 @@ static struct file *mmap_singleton(struct drm_i915_private *i915)
 	return file;
 }
 
-/*
- * This overcomes the limitation in drm_gem_mmap's assignment of a
- * drm_gem_object as the vma->vm_private_data. Since we need to
- * be able to resolve multiple mmap offsets which could be tied
- * to a single gem object.
- */
-int i915_gem_mmap(struct file *filp, struct vm_area_struct *vma)
+int i915_gem_update_vma_info(struct drm_i915_gem_object *obj,
+			     struct i915_mmap_offset *mmo,
+			     struct vm_area_struct *vma)
 {
-	struct drm_vma_offset_node *node;
-	struct drm_file *priv = filp->private_data;
-	struct drm_device *dev = priv->minor->dev;
-	struct drm_i915_gem_object *obj = NULL;
-	struct i915_mmap_offset *mmo = NULL;
 	struct file *anon;
 
-	if (drm_dev_is_unplugged(dev))
-		return -ENODEV;
-
-	rcu_read_lock();
-	drm_vma_offset_lock_lookup(dev->vma_offset_manager);
-	node = drm_vma_offset_exact_lookup_locked(dev->vma_offset_manager,
-						  vma->vm_pgoff,
-						  vma_pages(vma));
-	if (node && drm_vma_node_is_allowed(node, priv)) {
-		/*
-		 * Skip 0-refcnted objects as it is in the process of being
-		 * destroyed and will be invalid when the vma manager lock
-		 * is released.
-		 */
-		mmo = container_of(node, struct i915_mmap_offset, vma_node);
-		obj = i915_gem_object_get_rcu(mmo->obj);
-	}
-	drm_vma_offset_unlock_lookup(dev->vma_offset_manager);
-	rcu_read_unlock();
-	if (!obj)
-		return node ? -EACCES : -EINVAL;
-
 	if (i915_gem_object_is_readonly(obj)) {
-		if (vma->vm_flags & VM_WRITE) {
-			i915_gem_object_put(obj);
+		if (vma->vm_flags & VM_WRITE)
 			return -EINVAL;
-		}
+
 		vma->vm_flags &= ~VM_MAYWRITE;
 	}
 
-	anon = mmap_singleton(to_i915(dev));
-	if (IS_ERR(anon)) {
-		i915_gem_object_put(obj);
+	anon = mmap_singleton(to_i915(obj->base.dev));
+	if (IS_ERR(anon))
 		return PTR_ERR(anon);
-	}
 
 	vma->vm_flags |= VM_PFNMAP | VM_DONTEXPAND | VM_DONTDUMP;
 	vma->vm_private_data = mmo;
@@ -962,6 +928,50 @@ int i915_gem_mmap(struct file *filp, struct vm_area_struct *vma)
 	return 0;
 }
 
+/*
+ * This overcomes the limitation in drm_gem_mmap's assignment of a
+ * drm_gem_object as the vma->vm_private_data. Since we need to
+ * be able to resolve multiple mmap offsets which could be tied
+ * to a single gem object.
+ */
+int i915_gem_mmap(struct file *filp, struct vm_area_struct *vma)
+{
+	struct drm_vma_offset_node *node;
+	struct drm_file *priv = filp->private_data;
+	struct drm_device *dev = priv->minor->dev;
+	struct drm_i915_gem_object *obj = NULL;
+	struct i915_mmap_offset *mmo = NULL;
+	int err;
+
+	if (drm_dev_is_unplugged(dev))
+		return -ENODEV;
+
+	rcu_read_lock();
+	drm_vma_offset_lock_lookup(dev->vma_offset_manager);
+	node = drm_vma_offset_exact_lookup_locked(dev->vma_offset_manager,
+						  vma->vm_pgoff,
+						  vma_pages(vma));
+	if (node && drm_vma_node_is_allowed(node, priv)) {
+		/*
+		 * Skip 0-refcnted objects as it is in the process of being
+		 * destroyed and will be invalid when the vma manager lock
+		 * is released.
+		 */
+		mmo = container_of(node, struct i915_mmap_offset, vma_node);
+		obj = i915_gem_object_get_rcu(mmo->obj);
+	}
+	drm_vma_offset_unlock_lookup(dev->vma_offset_manager);
+	rcu_read_unlock();
+	if (!obj)
+		return node ? -EACCES : -EINVAL;
+
+	err = i915_gem_update_vma_info(obj, mmo, vma);
+	if (err)
+		i915_gem_object_put(obj);
+
+	return err;
+}
+
 #if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
 #include "selftests/i915_gem_mman.c"
 #endif
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_mman.h b/drivers/gpu/drm/i915/gem/i915_gem_mman.h
index 7c5ccdf59359..dfd19da0b3e7 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_mman.h
+++ b/drivers/gpu/drm/i915/gem/i915_gem_mman.h
@@ -10,6 +10,8 @@
 #include <linux/mm_types.h>
 #include <linux/types.h>
 
+#include "gem/i915_gem_object_types.h"
+
 struct drm_device;
 struct drm_file;
 struct drm_i915_gem_object;
@@ -31,4 +33,11 @@ void i915_gem_object_release_mmap_gtt(struct drm_i915_gem_object *obj);
 
 void i915_gem_object_release_mmap_offset(struct drm_i915_gem_object *obj);
 
+struct i915_mmap_offset *
+i915_gem_mmap_offset_attach(struct drm_i915_gem_object *obj,
+			    enum i915_mmap_type mmap_type,
+			    struct drm_file *file);
+int i915_gem_update_vma_info(struct drm_i915_gem_object *obj,
+			     struct i915_mmap_offset *mmo,
+			     struct vm_area_struct *vma);
 #endif
diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c
index 85fff8bed08c..5701549b5d13 100644
--- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c
+++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c
@@ -583,7 +583,7 @@ static bool assert_mmap_offset(struct drm_i915_private *i915,
 	if (IS_ERR(obj))
 		return false;
 
-	mmo = mmap_offset_attach(obj, I915_MMAP_OFFSET_GTT, NULL);
+	mmo = i915_gem_mmap_offset_attach(obj, I915_MMAP_OFFSET_GTT, NULL);
 	i915_gem_object_put(obj);
 
 	return PTR_ERR_OR_ZERO(mmo) == expected;
@@ -686,7 +686,7 @@ static int igt_mmap_offset_exhaustion(void *arg)
 		goto out;
 	}
 
-	mmo = mmap_offset_attach(obj, I915_MMAP_OFFSET_GTT, NULL);
+	mmo = i915_gem_mmap_offset_attach(obj, I915_MMAP_OFFSET_GTT, NULL);
 	if (IS_ERR(mmo)) {
 		pr_err("Unable to insert object into reclaimed hole\n");
 		err = PTR_ERR(mmo);
@@ -860,7 +860,7 @@ static int __igt_mmap(struct drm_i915_private *i915,
 	if (err)
 		return err;
 
-	mmo = mmap_offset_attach(obj, type, NULL);
+	mmo = i915_gem_mmap_offset_attach(obj, type, NULL);
 	if (IS_ERR(mmo))
 		return PTR_ERR(mmo);
 
@@ -996,7 +996,7 @@ static int __igt_mmap_access(struct drm_i915_private *i915,
 	if (!can_mmap(obj, type) || !can_access(obj))
 		return 0;
 
-	mmo = mmap_offset_attach(obj, type, NULL);
+	mmo = i915_gem_mmap_offset_attach(obj, type, NULL);
 	if (IS_ERR(mmo))
 		return PTR_ERR(mmo);
 
@@ -1109,7 +1109,7 @@ static int __igt_mmap_gpu(struct drm_i915_private *i915,
 	if (err)
 		return err;
 
-	mmo = mmap_offset_attach(obj, type, NULL);
+	mmo = i915_gem_mmap_offset_attach(obj, type, NULL);
 	if (IS_ERR(mmo))
 		return PTR_ERR(mmo);
 
@@ -1285,7 +1285,7 @@ static int __igt_mmap_revoke(struct drm_i915_private *i915,
 	if (!can_mmap(obj, type))
 		return 0;
 
-	mmo = mmap_offset_attach(obj, type, NULL);
+	mmo = i915_gem_mmap_offset_attach(obj, type, NULL);
 	if (IS_ERR(mmo))
 		return PTR_ERR(mmo);
 
