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 
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 
34 void *msm_gem_prime_vmap(struct drm_gem_object *obj)
35 {
36 	return msm_gem_vaddr(obj);
37 }
38 
39 void msm_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
40 {
41 	/* TODO msm_gem_vunmap() */
42 }
43 
44 int msm_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma)
45 {
46 	int ret;
47 
48 	mutex_lock(&obj->dev->struct_mutex);
49 	ret = drm_gem_mmap_obj(obj, obj->size, vma);
50 	mutex_unlock(&obj->dev->struct_mutex);
51 	if (ret < 0)
52 		return ret;
53 
54 	return msm_gem_mmap_obj(vma->vm_private_data, vma);
55 }
56 
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->size, sg);
61 }
62 
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 
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