linux/drivers/gpu/drm/xen/xen_drm_front_gem.c

// SPDX-License-Identifier: GPL-2.0 OR MIT

/*
 *  Xen para-virtual DRM device
 *
 * Copyright (C) 2016-2018 EPAM Systems Inc.
 *
 * Author: Oleksandr Andrushchenko <[email protected]>
 */

#include <linux/dma-buf.h>
#include <linux/scatterlist.h>
#include <linux/shmem_fs.h>
#include <linux/vmalloc.h>

#include <drm/drm_gem.h>
#include <drm/drm_prime.h>
#include <drm/drm_probe_helper.h>

#include <xen/balloon.h>
#include <xen/xen.h>

#include "xen_drm_front.h"
#include "xen_drm_front_gem.h"

struct xen_gem_object { … };

static inline struct xen_gem_object *
to_xen_gem_obj(struct drm_gem_object *gem_obj)
{ … }

static int gem_alloc_pages_array(struct xen_gem_object *xen_obj,
				 size_t buf_size)
{ … }

static void gem_free_pages_array(struct xen_gem_object *xen_obj)
{ … }

static int xen_drm_front_gem_object_mmap(struct drm_gem_object *gem_obj,
					 struct vm_area_struct *vma)
{ … }

static const struct vm_operations_struct xen_drm_drv_vm_ops = …;

static const struct drm_gem_object_funcs xen_drm_front_gem_object_funcs = …;

static struct xen_gem_object *gem_create_obj(struct drm_device *dev,
					     size_t size)
{ … }

static struct xen_gem_object *gem_create(struct drm_device *dev, size_t size)
{ … }

struct drm_gem_object *xen_drm_front_gem_create(struct drm_device *dev,
						size_t size)
{ … }

void xen_drm_front_gem_free_object_unlocked(struct drm_gem_object *gem_obj)
{ … }

struct page **xen_drm_front_gem_get_pages(struct drm_gem_object *gem_obj)
{ … }

struct sg_table *xen_drm_front_gem_get_sg_table(struct drm_gem_object *gem_obj)
{ … }

struct drm_gem_object *
xen_drm_front_gem_import_sg_table(struct drm_device *dev,
				  struct dma_buf_attachment *attach,
				  struct sg_table *sgt)
{ … }

int xen_drm_front_gem_prime_vmap(struct drm_gem_object *gem_obj,
				 struct iosys_map *map)
{ … }

void xen_drm_front_gem_prime_vunmap(struct drm_gem_object *gem_obj,
				    struct iosys_map *map)
{ … }