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
10struct panfrost_mmu;
11
12struct 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
43struct 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
52static inline
53struct  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
58static inline struct panfrost_gem_mapping *
59drm_mm_node_to_panfrost_mapping(struct drm_mm_node *node)
60{
61	return container_of(node, struct panfrost_gem_mapping, mmnode);
62}
63
64struct drm_gem_object *panfrost_gem_create_object(struct drm_device *dev, size_t size);
65
66struct drm_gem_object *
67panfrost_gem_prime_import_sg_table(struct drm_device *dev,
68				   struct dma_buf_attachment *attach,
69				   struct sg_table *sgt);
70
71struct panfrost_gem_object *
72panfrost_gem_create(struct drm_device *dev, size_t size, u32 flags);
73
74int panfrost_gem_open(struct drm_gem_object *obj, struct drm_file *file_priv);
75void panfrost_gem_close(struct drm_gem_object *obj,
76			struct drm_file *file_priv);
77
78struct panfrost_gem_mapping *
79panfrost_gem_mapping_get(struct panfrost_gem_object *bo,
80			 struct panfrost_file_priv *priv);
81void panfrost_gem_mapping_put(struct panfrost_gem_mapping *mapping);
82void panfrost_gem_teardown_mappings_locked(struct panfrost_gem_object *bo);
83
84void panfrost_gem_shrinker_init(struct drm_device *dev);
85void panfrost_gem_shrinker_cleanup(struct drm_device *dev);
86
87#endif /* __PANFROST_GEM_H__ */