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	/*
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
48struct 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
57static inline
58struct  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
63static inline struct panfrost_gem_mapping *
64drm_mm_node_to_panfrost_mapping(struct drm_mm_node *node)
65{
66	return container_of(node, struct panfrost_gem_mapping, mmnode);
67}
68
69struct drm_gem_object *panfrost_gem_create_object(struct drm_device *dev, size_t size);
70
71struct drm_gem_object *
72panfrost_gem_prime_import_sg_table(struct drm_device *dev,
73				   struct dma_buf_attachment *attach,
74				   struct sg_table *sgt);
75
76struct panfrost_gem_object *
77panfrost_gem_create(struct drm_device *dev, size_t size, u32 flags);
78
79int panfrost_gem_open(struct drm_gem_object *obj, struct drm_file *file_priv);
80void panfrost_gem_close(struct drm_gem_object *obj,
81			struct drm_file *file_priv);
82
83struct panfrost_gem_mapping *
84panfrost_gem_mapping_get(struct panfrost_gem_object *bo,
85			 struct panfrost_file_priv *priv);
86void panfrost_gem_mapping_put(struct panfrost_gem_mapping *mapping);
87void panfrost_gem_teardown_mappings_locked(struct panfrost_gem_object *bo);
88
89int panfrost_gem_shrinker_init(struct drm_device *dev);
90void panfrost_gem_shrinker_cleanup(struct drm_device *dev);
91
92#endif /* __PANFROST_GEM_H__ */
93