drivers/gpu/drm/msm/msm_gem_prime.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2013 Red Hat
 * Author: Rob Clark <robdclark@gmail.com>
 */

#include <linux/dma-buf.h>

#include <drm/drm_prime.h>

#include "msm_drv.h"
#include "msm_gem.h"

struct sg_table *msm_gem_prime_get_sg_table(struct drm_gem_object *obj)
{
	struct msm_gem_object *msm_obj = to_msm_bo(obj);
	int npages = obj->size >> PAGE_SHIFT;

	if (WARN_ON(!msm_obj->pages))  /* should have already pinned! */
		return ERR_PTR(-ENOMEM);

	return drm_prime_pages_to_sg(obj->dev, msm_obj->pages, npages);
}

int msm_gem_prime_vmap(struct drm_gem_object *obj, struct iosys_map *map)
{
	void *vaddr;

	vaddr = msm_gem_get_vaddr_locked(obj);
	if (IS_ERR(vaddr))
		return PTR_ERR(vaddr);
	iosys_map_set_vaddr(map, vaddr);

	return 0;
}

void msm_gem_prime_vunmap(struct drm_gem_object *obj, struct iosys_map *map)
{
	msm_gem_put_vaddr_locked(obj);
}

struct drm_gem_object *msm_gem_prime_import_sg_table(struct drm_device *dev,
		struct dma_buf_attachment *attach, struct sg_table *sg)
{
	return msm_gem_import(dev, attach->dmabuf, sg);
}

int msm_gem_prime_pin(struct drm_gem_object *obj)
{
	struct page **pages;
	int ret = 0;

	if (obj->import_attach)
		return 0;

	pages = msm_gem_pin_pages_locked(obj);
	if (IS_ERR(pages))
		ret = PTR_ERR(pages);

	return ret;
}

void msm_gem_prime_unpin(struct drm_gem_object *obj)
{
	if (obj->import_attach)
		return;

	msm_gem_unpin_pages_locked(obj);
}