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>
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18 * copy of this software and associated documentation files (the "Software"),
19 * to deal in the Software without restriction, including without limitation
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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,
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37 /* BSD specific gem helpers. */
38 #define DRM_GEM_MAPPING_MASK (3ULL << 62)
39 #define DRM_GEM_MAPPING_KEY (2ULL << 62) /* Non-canonical address form */
40 #define DRM_GEM_MAX_IDX 0x3fffff
41 #define DRM_GEM_MAPPING_IDX(o) (((o) >> 40) & DRM_GEM_MAX_IDX)
42 #define DRM_GEM_MAPPING_OFF(i) (((uint64_t)(i)) << 40)
43 #define DRM_GEM_MAPPING_MAPOFF(o) \
44 ((o) & ~(DRM_GEM_MAPPING_OFF(DRM_GEM_MAX_IDX) | DRM_GEM_MAPPING_KEY))
47 * This structure defines the drm_mm memory object, which will be used by the
48 * DRM for its buffer objects.
50 struct drm_gem_object {
51 /** Reference count of this object */
55 * handle_count - gem file_priv handle count of this object
57 * Each handle also holds a reference. Note that when the handle_count
58 * drops to 0 any global names (e.g. the id in the flink namespace) will
61 * Protected by dev->object_name_lock.
63 unsigned handle_count;
65 /** Related drm device */
66 struct drm_device *dev;
68 /** File representing the shmem storage: filp in Linux parlance */
71 /* Mapping info for this object */
72 struct drm_vma_offset_node vma_node;
74 struct drm_hash_item map_list;
77 * Size of the object, in bytes. Immutable over the object's
83 * Global name for this object, starts at 1. 0 means unnamed.
84 * Access is covered by the object_name_lock in the related drm_device
89 * Memory domains. These monitor which caches contain read/write data
90 * related to the object. When transitioning from one set of domains
91 * to another, the driver is called to ensure that caches are suitably
92 * flushed and invalidated
94 uint32_t read_domains;
95 uint32_t write_domain;
98 * While validating an exec operation, the
99 * new read/write domain values are computed here.
100 * They will be transferred to the above values
101 * at the point that any cache flushing occurs
103 uint32_t pending_read_domains;
104 uint32_t pending_write_domain;
106 /* dma buf exported from this GEM object */
107 struct dma_buf *export_dma_buf;
109 /* dma buf attachment backing this object */
110 struct dma_buf_attachment *import_attach;
113 * dumb - created as dumb buffer
114 * Whether the gem object was created using the dumb buffer interface
115 * as such it may not be used for GPU rendering.
120 void drm_gem_object_release(struct drm_gem_object *obj);
121 void drm_gem_object_free(struct kref *kref);
122 int drm_gem_object_init(struct drm_device *dev,
123 struct drm_gem_object *obj, size_t size);
124 void drm_gem_private_object_init(struct drm_device *dev,
125 struct drm_gem_object *obj, size_t size);
126 void drm_gem_vm_open(struct vm_area_struct *vma);
127 void drm_gem_vm_close(struct vm_area_struct *vma);
128 int drm_gem_mmap_obj(struct drm_gem_object *obj, unsigned long obj_size,
129 struct vm_area_struct *vma);
130 int drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
132 int i915_gem_pager_ctor(void *handle, vm_ooffset_t size, vm_prot_t prot,
133 vm_ooffset_t foff, struct ucred *cred, u_short *color);
134 void i915_gem_pager_dtor(void * handle);
137 drm_gem_object_reference(struct drm_gem_object *obj)
139 kref_get(&obj->refcount);
143 drm_gem_object_unreference(struct drm_gem_object *obj)
146 kref_put(&obj->refcount, drm_gem_object_free);
150 drm_gem_object_unreference_unlocked(struct drm_gem_object *obj)
153 struct drm_device *dev = obj->dev;
155 kref_put(&obj->refcount, drm_gem_object_free);
160 int drm_gem_handle_create(struct drm_file *file_priv,
161 struct drm_gem_object *obj,
163 int drm_gem_handle_delete(struct drm_file *filp, u32 handle);
166 void drm_gem_free_mmap_offset(struct drm_gem_object *obj);
167 int drm_gem_create_mmap_offset(struct drm_gem_object *obj);
168 int drm_gem_create_mmap_offset_size(struct drm_gem_object *obj, size_t size);
170 struct page **drm_gem_get_pages(struct drm_gem_object *obj);
171 void drm_gem_put_pages(struct drm_gem_object *obj, struct page **pages,
172 bool dirty, bool accessed);
174 struct drm_gem_object *drm_gem_object_lookup(struct drm_device *dev,
175 struct drm_file *filp,
177 int drm_gem_dumb_destroy(struct drm_file *file,
178 struct drm_device *dev,
181 #endif /* __DRM_GEM_H__ */