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
msm_gem_prime_mmap(struct drm_gem_object * obj,struct vm_area_struct * vma)14 int msm_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma)
15 {
16 int ret;
17
18 /* Ensure the mmap offset is initialized. We lazily initialize it,
19 * so if it has not been first mmap'd directly as a GEM object, the
20 * mmap offset will not be already initialized.
21 */
22 ret = drm_gem_create_mmap_offset(obj);
23 if (ret)
24 return ret;
25
26 return drm_gem_prime_mmap(obj, vma);
27 }
28
msm_gem_prime_get_sg_table(struct drm_gem_object * obj)29 struct sg_table *msm_gem_prime_get_sg_table(struct drm_gem_object *obj)
30 {
31 struct msm_gem_object *msm_obj = to_msm_bo(obj);
32 int npages = obj->size >> PAGE_SHIFT;
33
34 if (WARN_ON(!msm_obj->pages)) /* should have already pinned! */
35 return ERR_PTR(-ENOMEM);
36
37 return drm_prime_pages_to_sg(obj->dev, msm_obj->pages, npages);
38 }
39
msm_gem_prime_vmap(struct drm_gem_object * obj,struct iosys_map * map)40 int msm_gem_prime_vmap(struct drm_gem_object *obj, struct iosys_map *map)
41 {
42 void *vaddr;
43
44 vaddr = msm_gem_get_vaddr(obj);
45 if (IS_ERR(vaddr))
46 return PTR_ERR(vaddr);
47 iosys_map_set_vaddr(map, vaddr);
48
49 return 0;
50 }
51
msm_gem_prime_vunmap(struct drm_gem_object * obj,struct iosys_map * map)52 void msm_gem_prime_vunmap(struct drm_gem_object *obj, struct iosys_map *map)
53 {
54 msm_gem_put_vaddr(obj);
55 }
56
msm_gem_prime_import_sg_table(struct drm_device * dev,struct dma_buf_attachment * attach,struct sg_table * sg)57 struct drm_gem_object *msm_gem_prime_import_sg_table(struct drm_device *dev,
58 struct dma_buf_attachment *attach, struct sg_table *sg)
59 {
60 return msm_gem_import(dev, attach->dmabuf, sg);
61 }
62
msm_gem_prime_pin(struct drm_gem_object * obj)63 int msm_gem_prime_pin(struct drm_gem_object *obj)
64 {
65 if (!obj->import_attach)
66 msm_gem_get_pages(obj);
67 return 0;
68 }
69
msm_gem_prime_unpin(struct drm_gem_object * obj)70 void msm_gem_prime_unpin(struct drm_gem_object *obj)
71 {
72 if (!obj->import_attach)
73 msm_gem_put_pages(obj);
74 }
75