1 /*
2 * Copyright (C) 2015 Etnaviv Project
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License version 2 as published by
6 * the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
11 * more details.
12 *
13 * You should have received a copy of the GNU General Public License along with
14 * this program. If not, see <http://www.gnu.org/licenses/>.
15 */
16
17 #ifndef __ETNAVIV_GEM_H__
18 #define __ETNAVIV_GEM_H__
19
20 #include <linux/reservation.h>
21 #include "etnaviv_drv.h"
22
23 struct etnaviv_gem_ops;
24 struct etnaviv_gem_object;
25
26 struct etnaviv_gem_userptr {
27 uintptr_t ptr;
28 struct task_struct *task;
29 struct work_struct *work;
30 bool ro;
31 };
32
33 struct etnaviv_vram_mapping {
34 struct list_head obj_node;
35 struct list_head scan_node;
36 struct list_head mmu_node;
37 struct etnaviv_gem_object *object;
38 struct etnaviv_iommu *mmu;
39 struct drm_mm_node vram_node;
40 unsigned int use;
41 u32 iova;
42 };
43
44 struct etnaviv_gem_object {
45 struct drm_gem_object base;
46 const struct etnaviv_gem_ops *ops;
47 struct mutex lock;
48
49 u32 flags;
50
51 struct list_head gem_node;
52 struct etnaviv_gpu *gpu; /* non-null if active */
53 atomic_t gpu_active;
54 u32 access;
55
56 struct page **pages;
57 struct sg_table *sgt;
58 void *vaddr;
59
60 /* normally (resv == &_resv) except for imported bo's */
61 struct reservation_object *resv;
62 struct reservation_object _resv;
63
64 struct list_head vram_list;
65
66 /* cache maintenance */
67 u32 last_cpu_prep_op;
68
69 struct etnaviv_gem_userptr userptr;
70 };
71
72 static inline
to_etnaviv_bo(struct drm_gem_object * obj)73 struct etnaviv_gem_object *to_etnaviv_bo(struct drm_gem_object *obj)
74 {
75 return container_of(obj, struct etnaviv_gem_object, base);
76 }
77
78 struct etnaviv_gem_ops {
79 int (*get_pages)(struct etnaviv_gem_object *);
80 void (*release)(struct etnaviv_gem_object *);
81 void *(*vmap)(struct etnaviv_gem_object *);
82 int (*mmap)(struct etnaviv_gem_object *, struct vm_area_struct *);
83 };
84
is_active(struct etnaviv_gem_object * etnaviv_obj)85 static inline bool is_active(struct etnaviv_gem_object *etnaviv_obj)
86 {
87 return atomic_read(&etnaviv_obj->gpu_active) != 0;
88 }
89
90 #define MAX_CMDS 4
91
92 struct etnaviv_gem_submit_bo {
93 u32 flags;
94 struct etnaviv_gem_object *obj;
95 struct etnaviv_vram_mapping *mapping;
96 };
97
98 /* Created per submit-ioctl, to track bo's and cmdstream bufs, etc,
99 * associated with the cmdstream submission for synchronization (and
100 * make it easier to unwind when things go wrong, etc). This only
101 * lasts for the duration of the submit-ioctl.
102 */
103 struct etnaviv_gem_submit {
104 struct drm_device *dev;
105 struct etnaviv_gpu *gpu;
106 struct ww_acquire_ctx ticket;
107 u32 fence;
108 unsigned int nr_bos;
109 struct etnaviv_gem_submit_bo bos[0];
110 };
111
112 int etnaviv_gem_wait_bo(struct etnaviv_gpu *gpu, struct drm_gem_object *obj,
113 struct timespec *timeout);
114 int etnaviv_gem_new_private(struct drm_device *dev, size_t size, u32 flags,
115 struct reservation_object *robj, const struct etnaviv_gem_ops *ops,
116 struct etnaviv_gem_object **res);
117 int etnaviv_gem_obj_add(struct drm_device *dev, struct drm_gem_object *obj);
118 struct page **etnaviv_gem_get_pages(struct etnaviv_gem_object *obj);
119 void etnaviv_gem_put_pages(struct etnaviv_gem_object *obj);
120
121 struct etnaviv_vram_mapping *etnaviv_gem_mapping_get(
122 struct drm_gem_object *obj, struct etnaviv_gpu *gpu);
123 void etnaviv_gem_mapping_reference(struct etnaviv_vram_mapping *mapping);
124 void etnaviv_gem_mapping_unreference(struct etnaviv_vram_mapping *mapping);
125
126 #endif /* __ETNAVIV_GEM_H__ */
127