1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* Copyright 2019 Linaro, Ltd, Rob Herring <robh@kernel.org> */
3
4 #ifndef __PANFROST_GEM_H__
5 #define __PANFROST_GEM_H__
6
7 #include <drm/drm_gem_shmem_helper.h>
8 #include <drm/drm_mm.h>
9
10 struct panfrost_mmu;
11
12 struct panfrost_gem_object {
13 struct drm_gem_shmem_object base;
14 struct sg_table *sgts;
15
16 /*
17 * Use a list for now. If searching a mapping ever becomes the
18 * bottleneck, we should consider using an RB-tree, or even better,
19 * let the core store drm_gem_object_mapping entries (where we
20 * could place driver specific data) instead of drm_gem_object ones
21 * in its drm_file->object_idr table.
22 *
23 * struct drm_gem_object_mapping {
24 * struct drm_gem_object *obj;
25 * void *driver_priv;
26 * };
27 */
28 struct {
29 struct list_head list;
30 struct mutex lock;
31 } mappings;
32
33 /*
34 * Count the number of jobs referencing this BO so we don't let the
35 * shrinker reclaim this object prematurely.
36 */
37 atomic_t gpu_usecount;
38
39 /*
40 * Object chunk size currently mapped onto physical memory
41 */
42 size_t heap_rss_size;
43
44 bool noexec :1;
45 bool is_heap :1;
46 };
47
48 struct panfrost_gem_mapping {
49 struct list_head node;
50 struct kref refcount;
51 struct panfrost_gem_object *obj;
52 struct drm_mm_node mmnode;
53 struct panfrost_mmu *mmu;
54 bool active :1;
55 };
56
57 static inline
to_panfrost_bo(struct drm_gem_object * obj)58 struct panfrost_gem_object *to_panfrost_bo(struct drm_gem_object *obj)
59 {
60 return container_of(to_drm_gem_shmem_obj(obj), struct panfrost_gem_object, base);
61 }
62
63 static inline struct panfrost_gem_mapping *
drm_mm_node_to_panfrost_mapping(struct drm_mm_node * node)64 drm_mm_node_to_panfrost_mapping(struct drm_mm_node *node)
65 {
66 return container_of(node, struct panfrost_gem_mapping, mmnode);
67 }
68
69 struct drm_gem_object *panfrost_gem_create_object(struct drm_device *dev, size_t size);
70
71 struct drm_gem_object *
72 panfrost_gem_prime_import_sg_table(struct drm_device *dev,
73 struct dma_buf_attachment *attach,
74 struct sg_table *sgt);
75
76 struct panfrost_gem_object *
77 panfrost_gem_create(struct drm_device *dev, size_t size, u32 flags);
78
79 int panfrost_gem_open(struct drm_gem_object *obj, struct drm_file *file_priv);
80 void panfrost_gem_close(struct drm_gem_object *obj,
81 struct drm_file *file_priv);
82
83 struct panfrost_gem_mapping *
84 panfrost_gem_mapping_get(struct panfrost_gem_object *bo,
85 struct panfrost_file_priv *priv);
86 void panfrost_gem_mapping_put(struct panfrost_gem_mapping *mapping);
87 void panfrost_gem_teardown_mappings_locked(struct panfrost_gem_object *bo);
88
89 int panfrost_gem_shrinker_init(struct drm_device *dev);
90 void panfrost_gem_shrinker_cleanup(struct drm_device *dev);
91
92 #endif /* __PANFROST_GEM_H__ */
93