5 * GEM Graphics Execution Manager Driver Interfaces
7 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
8 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
9 * Copyright (c) 2009-2010, Code Aurora Forum.
10 * All rights reserved.
11 * Copyright © 2014 Intel Corporation
12 * Daniel Vetter <daniel.vetter@ffwll.ch>
14 * Author: Rickard E. (Rik) Faith <faith@valinux.com>
15 * Author: Gareth Hughes <gareth@valinux.com>
17 * Permission is hereby granted, free of charge, to any person obtaining a
18 * copy of this software and associated documentation files (the "Software"),
19 * to deal in the Software without restriction, including without limitation
20 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
21 * and/or sell copies of the Software, and to permit persons to whom the
22 * Software is furnished to do so, subject to the following conditions:
24 * The above copyright notice and this permission notice (including the next
25 * paragraph) shall be included in all copies or substantial portions of the
28 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
29 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
30 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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38 * This structure defines the drm_mm memory object, which will be used by the
39 * DRM for its buffer objects.
41 struct drm_gem_object {
42 /** Reference count of this object */
46 * handle_count - gem file_priv handle count of this object
48 * Each handle also holds a reference. Note that when the handle_count
49 * drops to 0 any global names (e.g. the id in the flink namespace) will
52 * Protected by dev->object_name_lock.
54 unsigned handle_count;
56 /** Related drm device */
57 struct drm_device *dev;
59 /** File representing the shmem storage: filp in Linux parlance */
62 /* Mapping info for this object */
63 struct drm_vma_offset_node vma_node;
65 struct drm_hash_item map_list;
68 * Size of the object, in bytes. Immutable over the object's
74 * Global name for this object, starts at 1. 0 means unnamed.
75 * Access is covered by the object_name_lock in the related drm_device
80 * Memory domains. These monitor which caches contain read/write data
81 * related to the object. When transitioning from one set of domains
82 * to another, the driver is called to ensure that caches are suitably
83 * flushed and invalidated
85 uint32_t read_domains;
86 uint32_t write_domain;
89 * While validating an exec operation, the
90 * new read/write domain values are computed here.
91 * They will be transferred to the above values
92 * at the point that any cache flushing occurs
94 uint32_t pending_read_domains;
95 uint32_t pending_write_domain;
97 /* dma buf exported from this GEM object */
98 struct dma_buf *export_dma_buf;
100 /* dma buf attachment backing this object */
101 struct dma_buf_attachment *import_attach;
104 * dumb - created as dumb buffer
105 * Whether the gem object was created using the dumb buffer interface
106 * as such it may not be used for GPU rendering.
111 void drm_gem_object_release(struct drm_gem_object *obj);
112 void drm_gem_object_free(struct kref *kref);
113 int drm_gem_object_init(struct drm_device *dev,
114 struct drm_gem_object *obj, size_t size);
115 void drm_gem_private_object_init(struct drm_device *dev,
116 struct drm_gem_object *obj, size_t size);
117 void drm_gem_vm_open(struct vm_area_struct *vma);
118 void drm_gem_vm_close(struct vm_area_struct *vma);
119 int drm_gem_mmap_obj(struct drm_gem_object *obj, unsigned long obj_size,
120 struct vm_area_struct *vma);
121 int drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
123 int i915_gem_pager_ctor(void *handle, vm_ooffset_t size, vm_prot_t prot,
124 vm_ooffset_t foff, struct ucred *cred, u_short *color);
125 void i915_gem_pager_dtor(void * handle);
128 drm_gem_object_reference(struct drm_gem_object *obj)
130 kref_get(&obj->refcount);
134 drm_gem_object_unreference(struct drm_gem_object *obj)
137 kref_put(&obj->refcount, drm_gem_object_free);
141 drm_gem_object_unreference_unlocked(struct drm_gem_object *obj)
144 struct drm_device *dev = obj->dev;
146 kref_put(&obj->refcount, drm_gem_object_free);
151 int drm_gem_handle_create(struct drm_file *file_priv,
152 struct drm_gem_object *obj,
154 int drm_gem_handle_delete(struct drm_file *filp, u32 handle);
157 void drm_gem_free_mmap_offset(struct drm_gem_object *obj);
158 int drm_gem_create_mmap_offset(struct drm_gem_object *obj);
159 int drm_gem_create_mmap_offset_size(struct drm_gem_object *obj, size_t size);
161 struct page **drm_gem_get_pages(struct drm_gem_object *obj);
162 void drm_gem_put_pages(struct drm_gem_object *obj, struct page **pages,
163 bool dirty, bool accessed);
165 struct drm_gem_object *drm_gem_object_lookup(struct drm_device *dev,
166 struct drm_file *filp,
168 int drm_gem_dumb_destroy(struct drm_file *file,
169 struct drm_device *dev,
172 #endif /* __DRM_GEM_H__ */