WebSVN – Kolibri OS – Diff – /drivers/include/linux/dma-buf.h


/*
 * Header file for dma buffer sharing framework.
 *
 * Copyright(C) 2011 Linaro Limited. All rights reserved.
 * Author: Sumit Semwal 
 *
 * Many thanks to linaro-mm-sig list, and specially
 * Arnd Bergmann , Rob Clark  and
 * Daniel Vetter  for their support in creation and
 * refining of this idea.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program.  If not, see .
 */
#ifndef __DMA_BUF_H__
#define __DMA_BUF_H__
 
#include 
#include 
#include 
#include 
#include 
#include 
 
struct device;
struct dma_buf;
struct dma_buf_attachment;
 
/**
 * struct dma_buf_ops - operations possible on struct dma_buf
 * @attach: [optional] allows different devices to 'attach' themselves to the
 *	    given buffer. It might return -EBUSY to signal that backing storage
 *	    is already allocated and incompatible with the requirements
 *	    of requesting device.
 * @detach: [optional] detach a given device from this buffer.
 * @map_dma_buf: returns list of scatter pages allocated, increases usecount
 *		 of the buffer. Requires atleast one attach to be called
 *		 before. Returned sg list should already be mapped into
 *		 _device_ address space. This call may sleep. May also return
 *		 -EINTR. Should return -EINVAL if attach hasn't been called yet.
 * @unmap_dma_buf: decreases usecount of buffer, might deallocate scatter
 *		   pages.
 * @release: release this buffer; to be called after the last dma_buf_put.
 * @begin_cpu_access: [optional] called before cpu access to invalidate cpu
 * 		      caches and allocate backing storage (if not yet done)
 * 		      respectively pin the objet into memory.
 * @end_cpu_access: [optional] called after cpu access to flush caches.
 * @kmap_atomic: maps a page from the buffer into kernel address
 * 		 space, users may not block until the subsequent unmap call.
 * 		 This callback must not sleep.
 * @kunmap_atomic: [optional] unmaps a atomically mapped page from the buffer.
 * 		   This Callback must not sleep.
 * @kmap: maps a page from the buffer into kernel address space.
 * @kunmap: [optional] unmaps a page from the buffer.
 * @mmap: used to expose the backing storage to userspace. Note that the
 * 	  mapping needs to be coherent - if the exporter doesn't directly
 * 	  support this, it needs to fake coherency by shooting down any ptes
 * 	  when transitioning away from the cpu domain.
 * @vmap: [optional] creates a virtual mapping for the buffer into kernel
 *	  address space. Same restrictions as for vmap and friends apply.
 * @vunmap: [optional] unmaps a vmap from the buffer
 */
struct dma_buf_ops {
	int (*attach)(struct dma_buf *, struct device *,
			struct dma_buf_attachment *);
 
	void (*detach)(struct dma_buf *, struct dma_buf_attachment *);
 
	/* For {map,unmap}_dma_buf below, any specific buffer attributes
	 * required should get added to device_dma_parameters accessible
	 * via dev->dma_params.
	 */
	struct sg_table * (*map_dma_buf)(struct dma_buf_attachment *,
						enum dma_data_direction);
	void (*unmap_dma_buf)(struct dma_buf_attachment *,
						struct sg_table *,
						enum dma_data_direction);
	/* TODO: Add try_map_dma_buf version, to return immed with -EBUSY
	 * if the call would block.
	 */
 
	/* after final dma_buf_put() */
	void (*release)(struct dma_buf *);
 
	int (*begin_cpu_access)(struct dma_buf *, size_t, size_t,
				enum dma_data_direction);
	void (*end_cpu_access)(struct dma_buf *, size_t, size_t,
			       enum dma_data_direction);
	void *(*kmap_atomic)(struct dma_buf *, unsigned long);
	void (*kunmap_atomic)(struct dma_buf *, unsigned long, void *);
	void *(*kmap)(struct dma_buf *, unsigned long);
	void (*kunmap)(struct dma_buf *, unsigned long, void *);
 
	int (*mmap)(struct dma_buf *, struct vm_area_struct *vma);
 
	void *(*vmap)(struct dma_buf *);
	void (*vunmap)(struct dma_buf *, void *vaddr);
};
 
/**
 * struct dma_buf - shared buffer object
 * @size: size of the buffer
 * @file: file pointer used for sharing buffers across, and for refcounting.
 * @attachments: list of dma_buf_attachment that denotes all devices attached.
 * @ops: dma_buf_ops associated with this buffer object.
 * @exp_name: name of the exporter; useful for debugging.
 * @list_node: node for dma_buf accounting and debugging.
 * @priv: exporter specific private data for this buffer object.
 * @resv: reservation object linked to this dma-buf
 */
struct dma_buf {
	size_t size;
	struct file *file;
	struct list_head attachments;
	const struct dma_buf_ops *ops;
	/* mutex to serialize list manipulation, attach/detach and vmap/unmap */
	struct mutex lock;
	unsigned vmapping_counter;
	void *vmap_ptr;
	const char *exp_name;
	struct list_head list_node;
	void *priv;
};
 
/**
 * struct dma_buf_attachment - holds device-buffer attachment data
 * @dmabuf: buffer for this attachment.
 * @dev: device attached to the buffer.
 * @node: list of dma_buf_attachment.
 * @priv: exporter specific attachment data.
 *
 * This structure holds the attachment information between the dma_buf buffer
 * and its user device(s). The list contains one attachment struct per device
 * attached to the buffer.
 */
struct dma_buf_attachment {
	struct dma_buf *dmabuf;
	struct device *dev;
	struct list_head node;
	void *priv;
};
 
/**
 * get_dma_buf - convenience wrapper for get_file.
 * @dmabuf:	[in]	pointer to dma_buf
 *
 * Increments the reference count on the dma-buf, needed in case of drivers
 * that either need to create additional references to the dmabuf on the
 * kernel side.  For example, an exporter that needs to keep a dmabuf ptr
 * so that subsequent exports don't create a new dmabuf.
 */
static inline void get_dma_buf(struct dma_buf *dmabuf)
{
	get_file(dmabuf->file);
}
 
struct dma_buf_attachment *dma_buf_attach(struct dma_buf *dmabuf,
							struct device *dev);
void dma_buf_detach(struct dma_buf *dmabuf,
				struct dma_buf_attachment *dmabuf_attach);
 
struct dma_buf *dma_buf_export_named(void *priv, const struct dma_buf_ops *ops,
			       size_t size, int flags, const char *,
			       struct reservation_object *);
 
#define dma_buf_export(priv, ops, size, flags, resv)	\
	dma_buf_export_named(priv, ops, size, flags, KBUILD_MODNAME, resv)
 
int dma_buf_fd(struct dma_buf *dmabuf, int flags);
struct dma_buf *dma_buf_get(int fd);
void dma_buf_put(struct dma_buf *dmabuf);
 
struct sg_table *dma_buf_map_attachment(struct dma_buf_attachment *,
					enum dma_data_direction);
void dma_buf_unmap_attachment(struct dma_buf_attachment *, struct sg_table *,
				enum dma_data_direction);
int dma_buf_begin_cpu_access(struct dma_buf *dma_buf, size_t start, size_t len,
			     enum dma_data_direction dir);
void dma_buf_end_cpu_access(struct dma_buf *dma_buf, size_t start, size_t len,
			    enum dma_data_direction dir);
void *dma_buf_kmap_atomic(struct dma_buf *, unsigned long);
void dma_buf_kunmap_atomic(struct dma_buf *, unsigned long, void *);
void *dma_buf_kmap(struct dma_buf *, unsigned long);
void dma_buf_kunmap(struct dma_buf *, unsigned long, void *);
 
int dma_buf_mmap(struct dma_buf *, struct vm_area_struct *,
		 unsigned long);
void *dma_buf_vmap(struct dma_buf *);
void dma_buf_vunmap(struct dma_buf *, void *vaddr);
int dma_buf_debugfs_create_file(const char *name,
				int (*write)(struct seq_file *));
#endif /* __DMA_BUF_H__ */

Subversion Repositories Kolibri OS

(root)/drivers/include/linux/dma-buf.h @ 6082 – Rev 4568 → 5056

Rev 4568		Rev 5056
1	/*	1	/*
2	* Header file for dma buffer sharing framework.	2	* Header file for dma buffer sharing framework.
3	*	3	*
4	* Copyright(C) 2011 Linaro Limited. All rights reserved.	4	* Copyright(C) 2011 Linaro Limited. All rights reserved.
5	* Author: Sumit Semwal	5	* Author: Sumit Semwal
6	*	6	*
7	* Many thanks to linaro-mm-sig list, and specially	7	* Many thanks to linaro-mm-sig list, and specially
8	* Arnd Bergmann , Rob Clark and	8	* Arnd Bergmann , Rob Clark and
9	* Daniel Vetter for their support in creation and	9	* Daniel Vetter for their support in creation and
10	* refining of this idea.	10	* refining of this idea.
11	*	11	*
12	* This program is free software; you can redistribute it and/or modify it	12	* This program is free software; you can redistribute it and/or modify it
13	* under the terms of the GNU General Public License version 2 as published by	13	* under the terms of the GNU General Public License version 2 as published by
14	* the Free Software Foundation.	14	* the Free Software Foundation.
15	*	15	*
16	* This program is distributed in the hope that it will be useful, but WITHOUT	16	* This program is distributed in the hope that it will be useful, but WITHOUT
17	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or	17	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
18	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for	18	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
19	* more details.	19	* more details.
20	*	20	*
21	* You should have received a copy of the GNU General Public License along with	21	* You should have received a copy of the GNU General Public License along with
22	* this program. If not, see .	22	* this program. If not, see .
23	*/	23	*/
24	#ifndef __DMA_BUF_H__	24	#ifndef __DMA_BUF_H__
25	#define __DMA_BUF_H__	25	#define __DMA_BUF_H__
26		26
27	#include	27	#include
28	#include	28	#include
29	#include	29	#include
30	#include	30	#include
31	#include	31	#include
32	#include	32	#include
33		33
34	struct device;	34	struct device;
35	struct dma_buf;	35	struct dma_buf;
36	struct dma_buf_attachment;	36	struct dma_buf_attachment;
37		37
38	/**	38	/**
39	* struct dma_buf_ops - operations possible on struct dma_buf	39	* struct dma_buf_ops - operations possible on struct dma_buf
40	* @attach: [optional] allows different devices to 'attach' themselves to the	40	* @attach: [optional] allows different devices to 'attach' themselves to the
41	* given buffer. It might return -EBUSY to signal that backing storage	41	* given buffer. It might return -EBUSY to signal that backing storage
42	* is already allocated and incompatible with the requirements	42	* is already allocated and incompatible with the requirements
43	* of requesting device.	43	* of requesting device.
44	* @detach: [optional] detach a given device from this buffer.	44	* @detach: [optional] detach a given device from this buffer.
45	* @map_dma_buf: returns list of scatter pages allocated, increases usecount	45	* @map_dma_buf: returns list of scatter pages allocated, increases usecount
46	* of the buffer. Requires atleast one attach to be called	46	* of the buffer. Requires atleast one attach to be called
47	* before. Returned sg list should already be mapped into	47	* before. Returned sg list should already be mapped into
48	* _device_ address space. This call may sleep. May also return	48	* _device_ address space. This call may sleep. May also return
49	* -EINTR. Should return -EINVAL if attach hasn't been called yet.	49	* -EINTR. Should return -EINVAL if attach hasn't been called yet.
50	* @unmap_dma_buf: decreases usecount of buffer, might deallocate scatter	50	* @unmap_dma_buf: decreases usecount of buffer, might deallocate scatter
51	* pages.	51	* pages.
52	* @release: release this buffer; to be called after the last dma_buf_put.	52	* @release: release this buffer; to be called after the last dma_buf_put.
53	* @begin_cpu_access: [optional] called before cpu access to invalidate cpu	53	* @begin_cpu_access: [optional] called before cpu access to invalidate cpu
54	* caches and allocate backing storage (if not yet done)	54	* caches and allocate backing storage (if not yet done)
55	* respectively pin the objet into memory.	55	* respectively pin the objet into memory.
56	* @end_cpu_access: [optional] called after cpu access to flush caches.	56	* @end_cpu_access: [optional] called after cpu access to flush caches.
57	* @kmap_atomic: maps a page from the buffer into kernel address	57	* @kmap_atomic: maps a page from the buffer into kernel address
58	* space, users may not block until the subsequent unmap call.	58	* space, users may not block until the subsequent unmap call.
59	* This callback must not sleep.	59	* This callback must not sleep.
60	* @kunmap_atomic: [optional] unmaps a atomically mapped page from the buffer.	60	* @kunmap_atomic: [optional] unmaps a atomically mapped page from the buffer.
61	* This Callback must not sleep.	61	* This Callback must not sleep.
62	* @kmap: maps a page from the buffer into kernel address space.	62	* @kmap: maps a page from the buffer into kernel address space.
63	* @kunmap: [optional] unmaps a page from the buffer.	63	* @kunmap: [optional] unmaps a page from the buffer.
64	* @mmap: used to expose the backing storage to userspace. Note that the	64	* @mmap: used to expose the backing storage to userspace. Note that the
65	* mapping needs to be coherent - if the exporter doesn't directly	65	* mapping needs to be coherent - if the exporter doesn't directly
66	* support this, it needs to fake coherency by shooting down any ptes	66	* support this, it needs to fake coherency by shooting down any ptes
67	* when transitioning away from the cpu domain.	67	* when transitioning away from the cpu domain.
68	* @vmap: [optional] creates a virtual mapping for the buffer into kernel	68	* @vmap: [optional] creates a virtual mapping for the buffer into kernel
69	* address space. Same restrictions as for vmap and friends apply.	69	* address space. Same restrictions as for vmap and friends apply.
70	* @vunmap: [optional] unmaps a vmap from the buffer	70	* @vunmap: [optional] unmaps a vmap from the buffer
71	*/	71	*/
72	struct dma_buf_ops {	72	struct dma_buf_ops {
73	int (attach)(struct dma_buf , struct device *,	73	int (attach)(struct dma_buf , struct device *,
74	struct dma_buf_attachment *);	74	struct dma_buf_attachment *);
75		75
76	void (detach)(struct dma_buf , struct dma_buf_attachment *);	76	void (detach)(struct dma_buf , struct dma_buf_attachment *);
77		77
78	/* For {map,unmap}_dma_buf below, any specific buffer attributes	78	/* For {map,unmap}_dma_buf below, any specific buffer attributes
79	* required should get added to device_dma_parameters accessible	79	* required should get added to device_dma_parameters accessible
80	* via dev->dma_params.	80	* via dev->dma_params.
81	*/	81	*/
82	struct sg_table * (map_dma_buf)(struct dma_buf_attachment ,	82	struct sg_table * (map_dma_buf)(struct dma_buf_attachment ,
83	enum dma_data_direction);	83	enum dma_data_direction);
84	void (unmap_dma_buf)(struct dma_buf_attachment ,	84	void (unmap_dma_buf)(struct dma_buf_attachment ,
85	struct sg_table *,	85	struct sg_table *,
86	enum dma_data_direction);	86	enum dma_data_direction);
87	/* TODO: Add try_map_dma_buf version, to return immed with -EBUSY	87	/* TODO: Add try_map_dma_buf version, to return immed with -EBUSY
88	* if the call would block.	88	* if the call would block.
89	*/	89	*/
90		90
91	/* after final dma_buf_put() */	91	/* after final dma_buf_put() */
92	void (release)(struct dma_buf );	92	void (release)(struct dma_buf );
93		93
94	int (begin_cpu_access)(struct dma_buf , size_t, size_t,	94	int (begin_cpu_access)(struct dma_buf , size_t, size_t,
95	enum dma_data_direction);	95	enum dma_data_direction);
96	void (end_cpu_access)(struct dma_buf , size_t, size_t,	96	void (end_cpu_access)(struct dma_buf , size_t, size_t,
97	enum dma_data_direction);	97	enum dma_data_direction);
98	void (kmap_atomic)(struct dma_buf *, unsigned long);	98	void (kmap_atomic)(struct dma_buf *, unsigned long);
99	void (kunmap_atomic)(struct dma_buf , unsigned long, void *);	99	void (kunmap_atomic)(struct dma_buf , unsigned long, void *);
100	void (kmap)(struct dma_buf *, unsigned long);	100	void (kmap)(struct dma_buf *, unsigned long);
101	void (kunmap)(struct dma_buf , unsigned long, void *);	101	void (kunmap)(struct dma_buf , unsigned long, void *);
102		102
103	int (mmap)(struct dma_buf , struct vm_area_struct *vma);	103	int (mmap)(struct dma_buf , struct vm_area_struct *vma);
104		104
105	void (vmap)(struct dma_buf *);	105	void (vmap)(struct dma_buf *);
106	void (vunmap)(struct dma_buf , void *vaddr);	106	void (vunmap)(struct dma_buf , void *vaddr);
107	};	107	};
108		108
109	/**	109	/**
110	* struct dma_buf - shared buffer object	110	* struct dma_buf - shared buffer object
111	* @size: size of the buffer	111	* @size: size of the buffer
112	* @file: file pointer used for sharing buffers across, and for refcounting.	112	* @file: file pointer used for sharing buffers across, and for refcounting.
113	* @attachments: list of dma_buf_attachment that denotes all devices attached.	113	* @attachments: list of dma_buf_attachment that denotes all devices attached.
114	* @ops: dma_buf_ops associated with this buffer object.	114	* @ops: dma_buf_ops associated with this buffer object.
115	* @exp_name: name of the exporter; useful for debugging.	115	* @exp_name: name of the exporter; useful for debugging.
116	* @list_node: node for dma_buf accounting and debugging.	116	* @list_node: node for dma_buf accounting and debugging.
117	* @priv: exporter specific private data for this buffer object.	117	* @priv: exporter specific private data for this buffer object.
-		118	* @resv: reservation object linked to this dma-buf
118	*/	119	*/
119	struct dma_buf {	120	struct dma_buf {
120	size_t size;	121	size_t size;
121	struct file *file;	122	struct file *file;
122	struct list_head attachments;	123	struct list_head attachments;
123	const struct dma_buf_ops *ops;	124	const struct dma_buf_ops *ops;
124	/* mutex to serialize list manipulation, attach/detach and vmap/unmap */	125	/* mutex to serialize list manipulation, attach/detach and vmap/unmap */
125	struct mutex lock;	126	struct mutex lock;
126	unsigned vmapping_counter;	127	unsigned vmapping_counter;
127	void *vmap_ptr;	128	void *vmap_ptr;
128	const char *exp_name;	129	const char *exp_name;
129	struct list_head list_node;	130	struct list_head list_node;
130	void *priv;	131	void *priv;
131	};	132	};
132		133
133	/**	134	/**
134	* struct dma_buf_attachment - holds device-buffer attachment data	135	* struct dma_buf_attachment - holds device-buffer attachment data
135	* @dmabuf: buffer for this attachment.	136	* @dmabuf: buffer for this attachment.
136	* @dev: device attached to the buffer.	137	* @dev: device attached to the buffer.
137	* @node: list of dma_buf_attachment.	138	* @node: list of dma_buf_attachment.
138	* @priv: exporter specific attachment data.	139	* @priv: exporter specific attachment data.
139	*	140	*
140	* This structure holds the attachment information between the dma_buf buffer	141	* This structure holds the attachment information between the dma_buf buffer
141	* and its user device(s). The list contains one attachment struct per device	142	* and its user device(s). The list contains one attachment struct per device
142	* attached to the buffer.	143	* attached to the buffer.
143	*/	144	*/
144	struct dma_buf_attachment {	145	struct dma_buf_attachment {
145	struct dma_buf *dmabuf;	146	struct dma_buf *dmabuf;
146	struct device *dev;	147	struct device *dev;
147	struct list_head node;	148	struct list_head node;
148	void *priv;	149	void *priv;
149	};	150	};
150		151
151	/**	152	/**
152	* get_dma_buf - convenience wrapper for get_file.	153	* get_dma_buf - convenience wrapper for get_file.
153	* @dmabuf: [in] pointer to dma_buf	154	* @dmabuf: [in] pointer to dma_buf
154	*	155	*
155	* Increments the reference count on the dma-buf, needed in case of drivers	156	* Increments the reference count on the dma-buf, needed in case of drivers
156	* that either need to create additional references to the dmabuf on the	157	* that either need to create additional references to the dmabuf on the
157	* kernel side. For example, an exporter that needs to keep a dmabuf ptr	158	* kernel side. For example, an exporter that needs to keep a dmabuf ptr
158	* so that subsequent exports don't create a new dmabuf.	159	* so that subsequent exports don't create a new dmabuf.
159	*/	160	*/
160	static inline void get_dma_buf(struct dma_buf *dmabuf)	161	static inline void get_dma_buf(struct dma_buf *dmabuf)
161	{	162	{
162	get_file(dmabuf->file);	163	get_file(dmabuf->file);
163	}	164	}
164		165
165	struct dma_buf_attachment dma_buf_attach(struct dma_buf dmabuf,	166	struct dma_buf_attachment dma_buf_attach(struct dma_buf dmabuf,
166	struct device *dev);	167	struct device *dev);
167	void dma_buf_detach(struct dma_buf *dmabuf,	168	void dma_buf_detach(struct dma_buf *dmabuf,
168	struct dma_buf_attachment *dmabuf_attach);	169	struct dma_buf_attachment *dmabuf_attach);
169		170
170	struct dma_buf dma_buf_export_named(void priv, const struct dma_buf_ops *ops,	171	struct dma_buf dma_buf_export_named(void priv, const struct dma_buf_ops *ops,
171	size_t size, int flags, const char *);	172	size_t size, int flags, const char *,
-		173	struct reservation_object *);
172		174
173	#define dma_buf_export(priv, ops, size, flags) \	175	#define dma_buf_export(priv, ops, size, flags, resv) \
174	dma_buf_export_named(priv, ops, size, flags, __FILE__)	176	dma_buf_export_named(priv, ops, size, flags, KBUILD_MODNAME, resv)
175		177
176	int dma_buf_fd(struct dma_buf *dmabuf, int flags);	178	int dma_buf_fd(struct dma_buf *dmabuf, int flags);
177	struct dma_buf *dma_buf_get(int fd);	179	struct dma_buf *dma_buf_get(int fd);
178	void dma_buf_put(struct dma_buf *dmabuf);	180	void dma_buf_put(struct dma_buf *dmabuf);
179		181
180	struct sg_table dma_buf_map_attachment(struct dma_buf_attachment ,	182	struct sg_table dma_buf_map_attachment(struct dma_buf_attachment ,
181	enum dma_data_direction);	183	enum dma_data_direction);
182	void dma_buf_unmap_attachment(struct dma_buf_attachment , struct sg_table ,	184	void dma_buf_unmap_attachment(struct dma_buf_attachment , struct sg_table ,
183	enum dma_data_direction);	185	enum dma_data_direction);
184	int dma_buf_begin_cpu_access(struct dma_buf *dma_buf, size_t start, size_t len,	186	int dma_buf_begin_cpu_access(struct dma_buf *dma_buf, size_t start, size_t len,
185	enum dma_data_direction dir);	187	enum dma_data_direction dir);
186	void dma_buf_end_cpu_access(struct dma_buf *dma_buf, size_t start, size_t len,	188	void dma_buf_end_cpu_access(struct dma_buf *dma_buf, size_t start, size_t len,
187	enum dma_data_direction dir);	189	enum dma_data_direction dir);
188	void dma_buf_kmap_atomic(struct dma_buf , unsigned long);	190	void dma_buf_kmap_atomic(struct dma_buf , unsigned long);
189	void dma_buf_kunmap_atomic(struct dma_buf , unsigned long, void );	191	void dma_buf_kunmap_atomic(struct dma_buf , unsigned long, void );
190	void dma_buf_kmap(struct dma_buf , unsigned long);	192	void dma_buf_kmap(struct dma_buf , unsigned long);
191	void dma_buf_kunmap(struct dma_buf , unsigned long, void );	193	void dma_buf_kunmap(struct dma_buf , unsigned long, void );
192		194
193	int dma_buf_mmap(struct dma_buf , struct vm_area_struct ,	195	int dma_buf_mmap(struct dma_buf , struct vm_area_struct ,
194	unsigned long);	196	unsigned long);
195	void dma_buf_vmap(struct dma_buf );	197	void dma_buf_vmap(struct dma_buf );
196	void dma_buf_vunmap(struct dma_buf , void vaddr);	198	void dma_buf_vunmap(struct dma_buf , void vaddr);
-		199	int dma_buf_debugfs_create_file(const char *name,
-		200	int (write)(struct seq_file ));
197	#endif /* __DMA_BUF_H__ */	201	#endif /* __DMA_BUF_H__ */