WebSVN – Kolibri OS – Blame – /drivers/include/drm/drm_gem.h

Rev	Author	Line No.	Line
5270	serge	1	#ifndef __DRM_GEM_H__
		2	#define __DRM_GEM_H__
		3
		4	/*
		5	* GEM Graphics Execution Manager Driver Interfaces
		6	*
		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
		13	*
		14	* Author: Rickard E. (Rik) Faith
		15	* Author: Gareth Hughes
		16	*
		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:
		23	*
		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
		26	* Software.
		27	*
		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
		31	* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
		32	* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
		33	* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
		34	* OTHER DEALINGS IN THE SOFTWARE.
		35	*/
		36
		37	/**
		38	* This structure defines the drm_mm memory object, which will be used by the
		39	* DRM for its buffer objects.
		40	*/
		41	struct drm_gem_object {
		42	/** Reference count of this object */
		43	struct kref refcount;
		44
		45	/**
		46	* handle_count - gem file_priv handle count of this object
		47	*
		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
		50	* be cleared.
		51	*
		52	* Protected by dev->object_name_lock.
		53	* */
		54	unsigned handle_count;
		55
		56	/** Related drm device */
		57	struct drm_device *dev;
		58
		59	/** File representing the shmem storage */
		60	struct file *filp;
		61
		62	/* Mapping info for this object */
		63	struct drm_vma_offset_node vma_node;
		64
		65	/**
		66	* Size of the object, in bytes. Immutable over the object's
		67	* lifetime.
		68	*/
		69	size_t size;
		70
		71	/**
		72	* Global name for this object, starts at 1. 0 means unnamed.
		73	* Access is covered by the object_name_lock in the related drm_device
		74	*/
		75	int name;
		76
		77	/**
		78	* Memory domains. These monitor which caches contain read/write data
		79	* related to the object. When transitioning from one set of domains
		80	* to another, the driver is called to ensure that caches are suitably
		81	* flushed and invalidated
		82	*/
		83	uint32_t read_domains;
		84	uint32_t write_domain;
		85
		86	/**
		87	* While validating an exec operation, the
		88	* new read/write domain values are computed here.
		89	* They will be transferred to the above values
		90	* at the point that any cache flushing occurs
		91	*/
		92	uint32_t pending_read_domains;
		93	uint32_t pending_write_domain;
		94
		95	/**
		96	* dma_buf - dma buf associated with this GEM object
		97	*
		98	* Pointer to the dma-buf associated with this gem object (either
		99	* through importing or exporting). We break the resulting reference
		100	* loop when the last gem handle for this object is released.
		101	*
		102	* Protected by obj->object_name_lock
		103	*/
		104	struct dma_buf *dma_buf;
		105
		106	/**
		107	* import_attach - dma buf attachment backing this object
		108	*
		109	* Any foreign dma_buf imported as a gem object has this set to the
		110	* attachment point for the device. This is invariant over the lifetime
		111	* of a gem object.
		112	*
		113	* The driver's ->gem_free_object callback is responsible for cleaning
		114	* up the dma_buf attachment and references acquired at import time.
		115	*
		116	* Note that the drm gem/prime core does not depend upon drivers setting
		117	* this field any more. So for drivers where this doesn't make sense
		118	* (e.g. virtual devices or a displaylink behind an usb bus) they can
		119	* simply leave it as NULL.
		120	*/
		121	struct dma_buf_attachment *import_attach;
		122
		123	/**
		124	* dumb - created as dumb buffer
		125	* Whether the gem object was created using the dumb buffer interface
		126	* as such it may not be used for GPU rendering.
		127	*/
		128	bool dumb;
		129	};
		130
		131	void drm_gem_object_release(struct drm_gem_object *obj);
		132	void drm_gem_object_free(struct kref *kref);
		133	int drm_gem_object_init(struct drm_device *dev,
		134	struct drm_gem_object *obj, size_t size);
		135	void drm_gem_private_object_init(struct drm_device *dev,
		136	struct drm_gem_object *obj, size_t size);
		137	void drm_gem_vm_open(struct vm_area_struct *vma);
		138	void drm_gem_vm_close(struct vm_area_struct *vma);
		139	int drm_gem_mmap_obj(struct drm_gem_object *obj, unsigned long obj_size,
		140	struct vm_area_struct *vma);
		141	int drm_gem_mmap(struct file filp, struct vm_area_struct vma);
		142
		143	static inline void
		144	drm_gem_object_reference(struct drm_gem_object *obj)
		145	{
		146	kref_get(&obj->refcount);
		147	}
		148
		149	static inline void
		150	drm_gem_object_unreference(struct drm_gem_object *obj)
		151	{
		152	if (obj != NULL)
		153	kref_put(&obj->refcount, drm_gem_object_free);
		154	}
		155
		156	static inline void
		157	drm_gem_object_unreference_unlocked(struct drm_gem_object *obj)
		158	{
		159	if (obj && !atomic_add_unless(&obj->refcount.refcount, -1, 1)) {
		160	struct drm_device *dev = obj->dev;
		161
		162	mutex_lock(&dev->struct_mutex);
		163	if (likely(atomic_dec_and_test(&obj->refcount.refcount)))
		164	drm_gem_object_free(&obj->refcount);
		165	mutex_unlock(&dev->struct_mutex);
		166	}
		167	}
		168
		169	int drm_gem_handle_create(struct drm_file *file_priv,
		170	struct drm_gem_object *obj,
		171	u32 *handlep);
		172	int drm_gem_handle_delete(struct drm_file *filp, u32 handle);
		173
		174
		175	void drm_gem_free_mmap_offset(struct drm_gem_object *obj);
		176	int drm_gem_create_mmap_offset(struct drm_gem_object *obj);
		177	int drm_gem_create_mmap_offset_size(struct drm_gem_object *obj, size_t size);
		178
		179	struct page *drm_gem_get_pages(struct drm_gem_object obj);
		180	void drm_gem_put_pages(struct drm_gem_object obj, struct page *pages,
		181	bool dirty, bool accessed);
		182
		183	struct drm_gem_object drm_gem_object_lookup(struct drm_device dev,
		184	struct drm_file *filp,
		185	u32 handle);
		186	int drm_gem_dumb_destroy(struct drm_file *file,
		187	struct drm_device *dev,
		188	uint32_t handle);
		189
		190	#endif /* __DRM_GEM_H__ */

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(root)/drivers/include/drm/drm_gem.h @ 5352 – Rev 5270