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 bool noexec :1;
40 bool is_heap :1;
41 };
42
43 struct panfrost_gem_mapping {
44 struct list_head node;
45 struct kref refcount;
46 struct panfrost_gem_object *obj;
47 struct drm_mm_node mmnode;
48 struct panfrost_mmu *mmu;
49 bool active :1;
50 };
51
52 static inline
to_panfrost_bo(struct drm_gem_object * obj)53 struct panfrost_gem_object *to_panfrost_bo(struct drm_gem_object *obj)
54 {
55 return container_of(to_drm_gem_shmem_obj(obj), struct panfrost_gem_object, base);
56 }
57
58 static inline struct panfrost_gem_mapping *
drm_mm_node_to_panfrost_mapping(struct drm_mm_node * node)59 drm_mm_node_to_panfrost_mapping(struct drm_mm_node *node)
60 {
61 return container_of(node, struct panfrost_gem_mapping, mmnode);
62 }
63
64 struct drm_gem_object *panfrost_gem_create_object(struct drm_device *dev, size_t size);
65
66 struct drm_gem_object *
67 panfrost_gem_prime_import_sg_table(struct drm_device *dev,
68 struct dma_buf_attachment *attach,
69 struct sg_table *sgt);
70
71 struct panfrost_gem_object *
72 panfrost_gem_create(struct drm_device *dev, size_t size, u32 flags);
73
74 int panfrost_gem_open(struct drm_gem_object *obj, struct drm_file *file_priv);
75 void panfrost_gem_close(struct drm_gem_object *obj,
76 struct drm_file *file_priv);
77
78 struct panfrost_gem_mapping *
79 panfrost_gem_mapping_get(struct panfrost_gem_object *bo,
80 struct panfrost_file_priv *priv);
81 void panfrost_gem_mapping_put(struct panfrost_gem_mapping *mapping);
82 void panfrost_gem_teardown_mappings_locked(struct panfrost_gem_object *bo);
83
84 void panfrost_gem_shrinker_init(struct drm_device *dev);
85 void panfrost_gem_shrinker_cleanup(struct drm_device *dev);
86
87 #endif /* __PANFROST_GEM_H__ */
88