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 ; |
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 |
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 * |
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 | |