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 	bool noexec		:1;
34 	bool is_heap		:1;
35 };
36 
37 struct panfrost_gem_mapping {
38 	struct list_head node;
39 	struct kref refcount;
40 	struct panfrost_gem_object *obj;
41 	struct drm_mm_node mmnode;
42 	struct panfrost_mmu *mmu;
43 	bool active		:1;
44 };
45 
46 static inline
47 struct  panfrost_gem_object *to_panfrost_bo(struct drm_gem_object *obj)
48 {
49 	return container_of(to_drm_gem_shmem_obj(obj), struct panfrost_gem_object, base);
50 }
51 
52 static inline struct panfrost_gem_mapping *
53 drm_mm_node_to_panfrost_mapping(struct drm_mm_node *node)
54 {
55 	return container_of(node, struct panfrost_gem_mapping, mmnode);
56 }
57 
58 struct drm_gem_object *panfrost_gem_create_object(struct drm_device *dev, size_t size);
59 
60 struct drm_gem_object *
61 panfrost_gem_prime_import_sg_table(struct drm_device *dev,
62 				   struct dma_buf_attachment *attach,
63 				   struct sg_table *sgt);
64 
65 struct panfrost_gem_object *
66 panfrost_gem_create_with_handle(struct drm_file *file_priv,
67 				struct drm_device *dev, size_t size,
68 				u32 flags,
69 				uint32_t *handle);
70 
71 int panfrost_gem_open(struct drm_gem_object *obj, struct drm_file *file_priv);
72 void panfrost_gem_close(struct drm_gem_object *obj,
73 			struct drm_file *file_priv);
74 
75 struct panfrost_gem_mapping *
76 panfrost_gem_mapping_get(struct panfrost_gem_object *bo,
77 			 struct panfrost_file_priv *priv);
78 void panfrost_gem_mapping_put(struct panfrost_gem_mapping *mapping);
79 void panfrost_gem_teardown_mappings(struct panfrost_gem_object *bo);
80 
81 void panfrost_gem_shrinker_init(struct drm_device *dev);
82 void panfrost_gem_shrinker_cleanup(struct drm_device *dev);
83 
84 #endif /* __PANFROST_GEM_H__ */
85