1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * Copyright (C) 2015-2018 Etnaviv Project
4  */
5 
6 #ifndef __ETNAVIV_GEM_H__
7 #define __ETNAVIV_GEM_H__
8 
9 #include <linux/reservation.h>
10 #include "etnaviv_cmdbuf.h"
11 #include "etnaviv_drv.h"
12 
13 struct dma_fence;
14 struct etnaviv_gem_ops;
15 struct etnaviv_gem_object;
16 
17 struct etnaviv_gem_userptr {
18 	uintptr_t ptr;
19 	struct mm_struct *mm;
20 	bool ro;
21 };
22 
23 struct etnaviv_vram_mapping {
24 	struct list_head obj_node;
25 	struct list_head scan_node;
26 	struct list_head mmu_node;
27 	struct etnaviv_gem_object *object;
28 	struct etnaviv_iommu *mmu;
29 	struct drm_mm_node vram_node;
30 	unsigned int use;
31 	u32 iova;
32 };
33 
34 struct etnaviv_gem_object {
35 	struct drm_gem_object base;
36 	const struct etnaviv_gem_ops *ops;
37 	struct mutex lock;
38 
39 	u32 flags;
40 
41 	struct list_head gem_node;
42 	struct etnaviv_gpu *gpu;     /* non-null if active */
43 	atomic_t gpu_active;
44 	u32 access;
45 
46 	struct page **pages;
47 	struct sg_table *sgt;
48 	void *vaddr;
49 
50 	/* normally (resv == &_resv) except for imported bo's */
51 	struct reservation_object *resv;
52 	struct reservation_object _resv;
53 
54 	struct list_head vram_list;
55 
56 	/* cache maintenance */
57 	u32 last_cpu_prep_op;
58 
59 	struct etnaviv_gem_userptr userptr;
60 };
61 
62 static inline
63 struct etnaviv_gem_object *to_etnaviv_bo(struct drm_gem_object *obj)
64 {
65 	return container_of(obj, struct etnaviv_gem_object, base);
66 }
67 
68 struct etnaviv_gem_ops {
69 	int (*get_pages)(struct etnaviv_gem_object *);
70 	void (*release)(struct etnaviv_gem_object *);
71 	void *(*vmap)(struct etnaviv_gem_object *);
72 	int (*mmap)(struct etnaviv_gem_object *, struct vm_area_struct *);
73 };
74 
75 static inline bool is_active(struct etnaviv_gem_object *etnaviv_obj)
76 {
77 	return atomic_read(&etnaviv_obj->gpu_active) != 0;
78 }
79 
80 #define MAX_CMDS 4
81 
82 struct etnaviv_gem_submit_bo {
83 	u32 flags;
84 	struct etnaviv_gem_object *obj;
85 	struct etnaviv_vram_mapping *mapping;
86 	struct dma_fence *excl;
87 	unsigned int nr_shared;
88 	struct dma_fence **shared;
89 };
90 
91 /* Created per submit-ioctl, to track bo's and cmdstream bufs, etc,
92  * associated with the cmdstream submission for synchronization (and
93  * make it easier to unwind when things go wrong, etc).
94  */
95 struct etnaviv_gem_submit {
96 	struct drm_sched_job sched_job;
97 	struct kref refcount;
98 	struct etnaviv_gpu *gpu;
99 	struct dma_fence *out_fence, *in_fence;
100 	int out_fence_id;
101 	struct list_head node; /* GPU active submit list */
102 	struct etnaviv_cmdbuf cmdbuf;
103 	bool runtime_resumed;
104 	u32 exec_state;
105 	u32 flags;
106 	unsigned int nr_pmrs;
107 	struct etnaviv_perfmon_request *pmrs;
108 	unsigned int nr_bos;
109 	struct etnaviv_gem_submit_bo bos[0];
110 	/* No new members here, the previous one is variable-length! */
111 };
112 
113 void etnaviv_submit_put(struct etnaviv_gem_submit * submit);
114 
115 int etnaviv_gem_wait_bo(struct etnaviv_gpu *gpu, struct drm_gem_object *obj,
116 	struct timespec *timeout);
117 int etnaviv_gem_new_private(struct drm_device *dev, size_t size, u32 flags,
118 	struct reservation_object *robj, const struct etnaviv_gem_ops *ops,
119 	struct etnaviv_gem_object **res);
120 void etnaviv_gem_obj_add(struct drm_device *dev, struct drm_gem_object *obj);
121 struct page **etnaviv_gem_get_pages(struct etnaviv_gem_object *obj);
122 void etnaviv_gem_put_pages(struct etnaviv_gem_object *obj);
123 
124 struct etnaviv_vram_mapping *etnaviv_gem_mapping_get(
125 	struct drm_gem_object *obj, struct etnaviv_gpu *gpu);
126 void etnaviv_gem_mapping_reference(struct etnaviv_vram_mapping *mapping);
127 void etnaviv_gem_mapping_unreference(struct etnaviv_vram_mapping *mapping);
128 
129 #endif /* __ETNAVIV_GEM_H__ */
130