1 /*
2 * Copyright (C) 2013 Red Hat
3 * Author: Rob Clark <robdclark@gmail.com>
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 as published by
7 * the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along with
15 * this program. If not, see <http://www.gnu.org/licenses/>.
16 */
17
18 #include "msm_drv.h"
19 #include "msm_gem.h"
20
21 #include <linux/dma-buf.h>
22
msm_gem_prime_get_sg_table(struct drm_gem_object * obj)23 struct sg_table *msm_gem_prime_get_sg_table(struct drm_gem_object *obj)
24 {
25 struct msm_gem_object *msm_obj = to_msm_bo(obj);
26 int npages = obj->size >> PAGE_SHIFT;
27
28 if (WARN_ON(!msm_obj->pages)) /* should have already pinned! */
29 return NULL;
30
31 return drm_prime_pages_to_sg(msm_obj->pages, npages);
32 }
33
msm_gem_prime_vmap(struct drm_gem_object * obj)34 void *msm_gem_prime_vmap(struct drm_gem_object *obj)
35 {
36 return msm_gem_get_vaddr(obj);
37 }
38
msm_gem_prime_vunmap(struct drm_gem_object * obj,void * vaddr)39 void msm_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
40 {
41 msm_gem_put_vaddr(obj);
42 }
43
msm_gem_prime_mmap(struct drm_gem_object * obj,struct vm_area_struct * vma)44 int msm_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma)
45 {
46 int ret;
47
48 ret = drm_gem_mmap_obj(obj, obj->size, vma);
49 if (ret < 0)
50 return ret;
51
52 return msm_gem_mmap_obj(vma->vm_private_data, vma);
53 }
54
msm_gem_prime_import_sg_table(struct drm_device * dev,struct dma_buf_attachment * attach,struct sg_table * sg)55 struct drm_gem_object *msm_gem_prime_import_sg_table(struct drm_device *dev,
56 struct dma_buf_attachment *attach, struct sg_table *sg)
57 {
58 return msm_gem_import(dev, attach->dmabuf, sg);
59 }
60
msm_gem_prime_pin(struct drm_gem_object * obj)61 int msm_gem_prime_pin(struct drm_gem_object *obj)
62 {
63 if (!obj->import_attach)
64 msm_gem_get_pages(obj);
65 return 0;
66 }
67
msm_gem_prime_unpin(struct drm_gem_object * obj)68 void msm_gem_prime_unpin(struct drm_gem_object *obj)
69 {
70 if (!obj->import_attach)
71 msm_gem_put_pages(obj);
72 }
73
msm_gem_prime_res_obj(struct drm_gem_object * obj)74 struct reservation_object *msm_gem_prime_res_obj(struct drm_gem_object *obj)
75 {
76 struct msm_gem_object *msm_obj = to_msm_bo(obj);
77
78 return msm_obj->resv;
79 }
80