drivers/gpu/drm/i915/selftests/igt_mmap.c

/*
 * SPDX-License-Identifier: MIT
 *
 * Copyright © 2019 Intel Corporation
 */

#include <drm/drm_file.h>

#include "i915_drv.h"
#include "igt_mmap.h"

unsigned long igt_mmap_node(struct drm_i915_private *i915,
			    struct drm_vma_offset_node *node,
			    unsigned long addr,
			    unsigned long prot,
			    unsigned long flags)
{
	struct file *file;
	int err;

	/* Pretend to open("/dev/dri/card0") */
	file = mock_drm_getfile(i915->drm.primary, O_RDWR);
	if (IS_ERR(file))
		return PTR_ERR(file);

	err = drm_vma_node_allow(node, file->private_data);
	if (err) {
		addr = err;
		goto out_file;
	}

	addr = vm_mmap(file, addr, drm_vma_node_size(node) << PAGE_SHIFT,
		       prot, flags, drm_vma_node_offset_addr(node));

	drm_vma_node_revoke(node, file->private_data);
out_file:
	fput(file);
	return addr;
}