v4.19.13 snapshot.
diff --git a/include/drm/drm_gem.h b/include/drm/drm_gem.h
new file mode 100644
index 0000000..3583b98
--- /dev/null
+++ b/include/drm/drm_gem.h
@@ -0,0 +1,296 @@
+#ifndef __DRM_GEM_H__
+#define __DRM_GEM_H__
+
+/*
+ * GEM Graphics Execution Manager Driver Interfaces
+ *
+ * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
+ * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
+ * Copyright (c) 2009-2010, Code Aurora Forum.
+ * All rights reserved.
+ * Copyright © 2014 Intel Corporation
+ * Daniel Vetter <daniel.vetter@ffwll.ch>
+ *
+ * Author: Rickard E. (Rik) Faith <faith@valinux.com>
+ * Author: Gareth Hughes <gareth@valinux.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <linux/kref.h>
+
+#include <drm/drm_vma_manager.h>
+
+/**
+ * struct drm_gem_object - GEM buffer object
+ *
+ * This structure defines the generic parts for GEM buffer objects, which are
+ * mostly around handling mmap and userspace handles.
+ *
+ * Buffer objects are often abbreviated to BO.
+ */
+struct drm_gem_object {
+ /**
+ * @refcount:
+ *
+ * Reference count of this object
+ *
+ * Please use drm_gem_object_get() to acquire and drm_gem_object_put()
+ * or drm_gem_object_put_unlocked() to release a reference to a GEM
+ * buffer object.
+ */
+ struct kref refcount;
+
+ /**
+ * @handle_count:
+ *
+ * This is the GEM file_priv handle count of this object.
+ *
+ * Each handle also holds a reference. Note that when the handle_count
+ * drops to 0 any global names (e.g. the id in the flink namespace) will
+ * be cleared.
+ *
+ * Protected by &drm_device.object_name_lock.
+ */
+ unsigned handle_count;
+
+ /**
+ * @dev: DRM dev this object belongs to.
+ */
+ struct drm_device *dev;
+
+ /**
+ * @filp:
+ *
+ * SHMEM file node used as backing storage for swappable buffer objects.
+ * GEM also supports driver private objects with driver-specific backing
+ * storage (contiguous CMA memory, special reserved blocks). In this
+ * case @filp is NULL.
+ */
+ struct file *filp;
+
+ /**
+ * @vma_node:
+ *
+ * Mapping info for this object to support mmap. Drivers are supposed to
+ * allocate the mmap offset using drm_gem_create_mmap_offset(). The
+ * offset itself can be retrieved using drm_vma_node_offset_addr().
+ *
+ * Memory mapping itself is handled by drm_gem_mmap(), which also checks
+ * that userspace is allowed to access the object.
+ */
+ struct drm_vma_offset_node vma_node;
+
+ /**
+ * @size:
+ *
+ * Size of the object, in bytes. Immutable over the object's
+ * lifetime.
+ */
+ size_t size;
+
+ /**
+ * @name:
+ *
+ * Global name for this object, starts at 1. 0 means unnamed.
+ * Access is covered by &drm_device.object_name_lock. This is used by
+ * the GEM_FLINK and GEM_OPEN ioctls.
+ */
+ int name;
+
+ /**
+ * @dma_buf:
+ *
+ * dma-buf associated with this GEM object.
+ *
+ * Pointer to the dma-buf associated with this gem object (either
+ * through importing or exporting). We break the resulting reference
+ * loop when the last gem handle for this object is released.
+ *
+ * Protected by &drm_device.object_name_lock.
+ */
+ struct dma_buf *dma_buf;
+
+ /**
+ * @import_attach:
+ *
+ * dma-buf attachment backing this object.
+ *
+ * Any foreign dma_buf imported as a gem object has this set to the
+ * attachment point for the device. This is invariant over the lifetime
+ * of a gem object.
+ *
+ * The &drm_driver.gem_free_object callback is responsible for cleaning
+ * up the dma_buf attachment and references acquired at import time.
+ *
+ * Note that the drm gem/prime core does not depend upon drivers setting
+ * this field any more. So for drivers where this doesn't make sense
+ * (e.g. virtual devices or a displaylink behind an usb bus) they can
+ * simply leave it as NULL.
+ */
+ struct dma_buf_attachment *import_attach;
+};
+
+/**
+ * DEFINE_DRM_GEM_FOPS() - macro to generate file operations for GEM drivers
+ * @name: name for the generated structure
+ *
+ * This macro autogenerates a suitable &struct file_operations for GEM based
+ * drivers, which can be assigned to &drm_driver.fops. Note that this structure
+ * cannot be shared between drivers, because it contains a reference to the
+ * current module using THIS_MODULE.
+ *
+ * Note that the declaration is already marked as static - if you need a
+ * non-static version of this you're probably doing it wrong and will break the
+ * THIS_MODULE reference by accident.
+ */
+#define DEFINE_DRM_GEM_FOPS(name) \
+ static const struct file_operations name = {\
+ .owner = THIS_MODULE,\
+ .open = drm_open,\
+ .release = drm_release,\
+ .unlocked_ioctl = drm_ioctl,\
+ .compat_ioctl = drm_compat_ioctl,\
+ .poll = drm_poll,\
+ .read = drm_read,\
+ .llseek = noop_llseek,\
+ .mmap = drm_gem_mmap,\
+ }
+
+void drm_gem_object_release(struct drm_gem_object *obj);
+void drm_gem_object_free(struct kref *kref);
+int drm_gem_object_init(struct drm_device *dev,
+ struct drm_gem_object *obj, size_t size);
+void drm_gem_private_object_init(struct drm_device *dev,
+ struct drm_gem_object *obj, size_t size);
+void drm_gem_vm_open(struct vm_area_struct *vma);
+void drm_gem_vm_close(struct vm_area_struct *vma);
+int drm_gem_mmap_obj(struct drm_gem_object *obj, unsigned long obj_size,
+ struct vm_area_struct *vma);
+int drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
+
+/**
+ * drm_gem_object_get - acquire a GEM buffer object reference
+ * @obj: GEM buffer object
+ *
+ * This function acquires an additional reference to @obj. It is illegal to
+ * call this without already holding a reference. No locks required.
+ */
+static inline void drm_gem_object_get(struct drm_gem_object *obj)
+{
+ kref_get(&obj->refcount);
+}
+
+/**
+ * __drm_gem_object_put - raw function to release a GEM buffer object reference
+ * @obj: GEM buffer object
+ *
+ * This function is meant to be used by drivers which are not encumbered with
+ * &drm_device.struct_mutex legacy locking and which are using the
+ * gem_free_object_unlocked callback. It avoids all the locking checks and
+ * locking overhead of drm_gem_object_put() and drm_gem_object_put_unlocked().
+ *
+ * Drivers should never call this directly in their code. Instead they should
+ * wrap it up into a ``driver_gem_object_put(struct driver_gem_object *obj)``
+ * wrapper function, and use that. Shared code should never call this, to
+ * avoid breaking drivers by accident which still depend upon
+ * &drm_device.struct_mutex locking.
+ */
+static inline void
+__drm_gem_object_put(struct drm_gem_object *obj)
+{
+ kref_put(&obj->refcount, drm_gem_object_free);
+}
+
+void drm_gem_object_put_unlocked(struct drm_gem_object *obj);
+void drm_gem_object_put(struct drm_gem_object *obj);
+
+/**
+ * drm_gem_object_reference - acquire a GEM buffer object reference
+ * @obj: GEM buffer object
+ *
+ * This is a compatibility alias for drm_gem_object_get() and should not be
+ * used by new code.
+ */
+static inline void drm_gem_object_reference(struct drm_gem_object *obj)
+{
+ drm_gem_object_get(obj);
+}
+
+/**
+ * __drm_gem_object_unreference - raw function to release a GEM buffer object
+ * reference
+ * @obj: GEM buffer object
+ *
+ * This is a compatibility alias for __drm_gem_object_put() and should not be
+ * used by new code.
+ */
+static inline void __drm_gem_object_unreference(struct drm_gem_object *obj)
+{
+ __drm_gem_object_put(obj);
+}
+
+/**
+ * drm_gem_object_unreference_unlocked - release a GEM buffer object reference
+ * @obj: GEM buffer object
+ *
+ * This is a compatibility alias for drm_gem_object_put_unlocked() and should
+ * not be used by new code.
+ */
+static inline void
+drm_gem_object_unreference_unlocked(struct drm_gem_object *obj)
+{
+ drm_gem_object_put_unlocked(obj);
+}
+
+/**
+ * drm_gem_object_unreference - release a GEM buffer object reference
+ * @obj: GEM buffer object
+ *
+ * This is a compatibility alias for drm_gem_object_put() and should not be
+ * used by new code.
+ */
+static inline void drm_gem_object_unreference(struct drm_gem_object *obj)
+{
+ drm_gem_object_put(obj);
+}
+
+int drm_gem_handle_create(struct drm_file *file_priv,
+ struct drm_gem_object *obj,
+ u32 *handlep);
+int drm_gem_handle_delete(struct drm_file *filp, u32 handle);
+
+
+void drm_gem_free_mmap_offset(struct drm_gem_object *obj);
+int drm_gem_create_mmap_offset(struct drm_gem_object *obj);
+int drm_gem_create_mmap_offset_size(struct drm_gem_object *obj, size_t size);
+
+struct page **drm_gem_get_pages(struct drm_gem_object *obj);
+void drm_gem_put_pages(struct drm_gem_object *obj, struct page **pages,
+ bool dirty, bool accessed);
+
+struct drm_gem_object *drm_gem_object_lookup(struct drm_file *filp, u32 handle);
+int drm_gem_dumb_map_offset(struct drm_file *file, struct drm_device *dev,
+ u32 handle, u64 *offset);
+int drm_gem_dumb_destroy(struct drm_file *file,
+ struct drm_device *dev,
+ uint32_t handle);
+
+#endif /* __DRM_GEM_H__ */