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
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 
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