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Linux kernel mirror (for testing)
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linux
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2013 Red Hat
4 * Author: Rob Clark <robdclark@gmail.com>
5 */
6
7#include <linux/dma-buf.h>
8
9#include <drm/drm_prime.h>
10
11#include "msm_drv.h"
12#include "msm_gem.h"
13
14struct sg_table *msm_gem_prime_get_sg_table(struct drm_gem_object *obj)
15{
16 struct msm_gem_object *msm_obj = to_msm_bo(obj);
17 int npages = obj->size >> PAGE_SHIFT;
18
19 if (WARN_ON(!msm_obj->pages)) /* should have already pinned! */
20 return ERR_PTR(-ENOMEM);
21
22 return drm_prime_pages_to_sg(obj->dev, msm_obj->pages, npages);
23}
24
25int msm_gem_prime_vmap(struct drm_gem_object *obj, struct iosys_map *map)
26{
27 void *vaddr;
28
29 vaddr = msm_gem_get_vaddr_locked(obj);
30 if (IS_ERR(vaddr))
31 return PTR_ERR(vaddr);
32 iosys_map_set_vaddr(map, vaddr);
33
34 return 0;
35}
36
37void msm_gem_prime_vunmap(struct drm_gem_object *obj, struct iosys_map *map)
38{
39 msm_gem_put_vaddr_locked(obj);
40}
41
42struct drm_gem_object *msm_gem_prime_import_sg_table(struct drm_device *dev,
43 struct dma_buf_attachment *attach, struct sg_table *sg)
44{
45 return msm_gem_import(dev, attach->dmabuf, sg);
46}
47
48int msm_gem_prime_pin(struct drm_gem_object *obj)
49{
50 struct page **pages;
51 int ret = 0;
52
53 if (obj->import_attach)
54 return 0;
55
56 pages = msm_gem_pin_pages_locked(obj);
57 if (IS_ERR(pages))
58 ret = PTR_ERR(pages);
59
60 return ret;
61}
62
63void msm_gem_prime_unpin(struct drm_gem_object *obj)
64{
65 if (obj->import_attach)
66 return;
67
68 msm_gem_unpin_pages_locked(obj);
69}