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1 | /* |
2 | * videobuf2-core.h - V4L2 driver helper framework |
3 | * |
4 | * Copyright (C) 2010 Samsung Electronics |
5 | * |
6 | * Author: Pawel Osciak <pawel@osciak.com> |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify |
9 | * it under the terms of the GNU General Public License as published by |
10 | * the Free Software Foundation. |
11 | */ |
12 | #ifndef _MEDIA_VIDEOBUF2_CORE_H |
13 | #define _MEDIA_VIDEOBUF2_CORE_H |
14 | |
15 | #include <linux/mm_types.h> |
16 | #include <linux/mutex.h> |
17 | #include <linux/poll.h> |
18 | #include <linux/videodev2.h> |
19 | #include <linux/dma-buf.h> |
20 | |
21 | struct vb2_alloc_ctx; |
22 | struct vb2_fileio_data; |
23 | |
24 | /** |
25 | * struct vb2_mem_ops - memory handling/memory allocator operations |
26 | * @alloc: allocate video memory and, optionally, allocator private data, |
27 | * return NULL on failure or a pointer to allocator private, |
28 | * per-buffer data on success; the returned private structure |
29 | * will then be passed as buf_priv argument to other ops in this |
30 | * structure. Additional gfp_flags to use when allocating the |
31 | * are also passed to this operation. These flags are from the |
32 | * gfp_flags field of vb2_queue. |
33 | * @put: inform the allocator that the buffer will no longer be used; |
34 | * usually will result in the allocator freeing the buffer (if |
35 | * no other users of this buffer are present); the buf_priv |
36 | * argument is the allocator private per-buffer structure |
37 | * previously returned from the alloc callback |
38 | * @get_userptr: acquire userspace memory for a hardware operation; used for |
39 | * USERPTR memory types; vaddr is the address passed to the |
40 | * videobuf layer when queuing a video buffer of USERPTR type; |
41 | * should return an allocator private per-buffer structure |
42 | * associated with the buffer on success, NULL on failure; |
43 | * the returned private structure will then be passed as buf_priv |
44 | * argument to other ops in this structure |
45 | * @put_userptr: inform the allocator that a USERPTR buffer will no longer |
46 | * be used |
47 | * @attach_dmabuf: attach a shared struct dma_buf for a hardware operation; |
48 | * used for DMABUF memory types; alloc_ctx is the alloc context |
49 | * dbuf is the shared dma_buf; returns NULL on failure; |
50 | * allocator private per-buffer structure on success; |
51 | * this needs to be used for further accesses to the buffer |
52 | * @detach_dmabuf: inform the exporter of the buffer that the current DMABUF |
53 | * buffer is no longer used; the buf_priv argument is the |
54 | * allocator private per-buffer structure previously returned |
55 | * from the attach_dmabuf callback |
56 | * @map_dmabuf: request for access to the dmabuf from allocator; the allocator |
57 | * of dmabuf is informed that this driver is going to use the |
58 | * dmabuf |
59 | * @unmap_dmabuf: releases access control to the dmabuf - allocator is notified |
60 | * that this driver is done using the dmabuf for now |
61 | * @prepare: called every time the buffer is passed from userspace to the |
62 | * driver, useful for cache synchronisation, optional |
63 | * @finish: called every time the buffer is passed back from the driver |
64 | * to the userspace, also optional |
65 | * @vaddr: return a kernel virtual address to a given memory buffer |
66 | * associated with the passed private structure or NULL if no |
67 | * such mapping exists |
68 | * @cookie: return allocator specific cookie for a given memory buffer |
69 | * associated with the passed private structure or NULL if not |
70 | * available |
71 | * @num_users: return the current number of users of a memory buffer; |
72 | * return 1 if the videobuf layer (or actually the driver using |
73 | * it) is the only user |
74 | * @mmap: setup a userspace mapping for a given memory buffer under |
75 | * the provided virtual memory region |
76 | * |
77 | * Required ops for USERPTR types: get_userptr, put_userptr. |
78 | * Required ops for MMAP types: alloc, put, num_users, mmap. |
79 | * Required ops for read/write access types: alloc, put, num_users, vaddr |
80 | * Required ops for DMABUF types: attach_dmabuf, detach_dmabuf, map_dmabuf, |
81 | * unmap_dmabuf. |
82 | */ |
83 | struct vb2_mem_ops { |
84 | void *(*alloc)(void *alloc_ctx, unsigned long size, gfp_t gfp_flags); |
85 | void (*put)(void *buf_priv); |
86 | struct dma_buf *(*get_dmabuf)(void *buf_priv, unsigned long flags); |
87 | |
88 | void *(*get_userptr)(void *alloc_ctx, unsigned long vaddr, |
89 | unsigned long size, int write); |
90 | void (*put_userptr)(void *buf_priv); |
91 | |
92 | void (*prepare)(void *buf_priv); |
93 | void (*finish)(void *buf_priv); |
94 | |
95 | void *(*attach_dmabuf)(void *alloc_ctx, struct dma_buf *dbuf, |
96 | unsigned long size, int write); |
97 | void (*detach_dmabuf)(void *buf_priv); |
98 | int (*map_dmabuf)(void *buf_priv); |
99 | void (*unmap_dmabuf)(void *buf_priv); |
100 | |
101 | void *(*vaddr)(void *buf_priv); |
102 | void *(*cookie)(void *buf_priv); |
103 | |
104 | unsigned int (*num_users)(void *buf_priv); |
105 | |
106 | int (*mmap)(void *buf_priv, struct vm_area_struct *vma); |
107 | }; |
108 | |
109 | struct vb2_plane { |
110 | void *mem_priv; |
111 | struct dma_buf *dbuf; |
112 | unsigned int dbuf_mapped; |
113 | }; |
114 | |
115 | /** |
116 | * enum vb2_io_modes - queue access methods |
117 | * @VB2_MMAP: driver supports MMAP with streaming API |
118 | * @VB2_USERPTR: driver supports USERPTR with streaming API |
119 | * @VB2_READ: driver supports read() style access |
120 | * @VB2_WRITE: driver supports write() style access |
121 | * @VB2_DMABUF: driver supports DMABUF with streaming API |
122 | */ |
123 | enum vb2_io_modes { |
124 | VB2_MMAP = (1 << 0), |
125 | VB2_USERPTR = (1 << 1), |
126 | VB2_READ = (1 << 2), |
127 | VB2_WRITE = (1 << 3), |
128 | VB2_DMABUF = (1 << 4), |
129 | }; |
130 | |
131 | /** |
132 | * enum vb2_fileio_flags - flags for selecting a mode of the file io emulator, |
133 | * by default the 'streaming' style is used by the file io emulator |
134 | * @VB2_FILEIO_READ_ONCE: report EOF after reading the first buffer |
135 | * @VB2_FILEIO_WRITE_IMMEDIATELY: queue buffer after each write() call |
136 | */ |
137 | enum vb2_fileio_flags { |
138 | VB2_FILEIO_READ_ONCE = (1 << 0), |
139 | VB2_FILEIO_WRITE_IMMEDIATELY = (1 << 1), |
140 | }; |
141 | |
142 | /** |
143 | * enum vb2_buffer_state - current video buffer state |
144 | * @VB2_BUF_STATE_DEQUEUED: buffer under userspace control |
145 | * @VB2_BUF_STATE_PREPARED: buffer prepared in videobuf and by the driver |
146 | * @VB2_BUF_STATE_QUEUED: buffer queued in videobuf, but not in driver |
147 | * @VB2_BUF_STATE_ACTIVE: buffer queued in driver and possibly used |
148 | * in a hardware operation |
149 | * @VB2_BUF_STATE_DONE: buffer returned from driver to videobuf, but |
150 | * not yet dequeued to userspace |
151 | * @VB2_BUF_STATE_ERROR: same as above, but the operation on the buffer |
152 | * has ended with an error, which will be reported |
153 | * to the userspace when it is dequeued |
154 | */ |
155 | enum vb2_buffer_state { |
156 | VB2_BUF_STATE_DEQUEUED, |
157 | VB2_BUF_STATE_PREPARED, |
158 | VB2_BUF_STATE_QUEUED, |
159 | VB2_BUF_STATE_ACTIVE, |
160 | VB2_BUF_STATE_DONE, |
161 | VB2_BUF_STATE_ERROR, |
162 | }; |
163 | |
164 | struct vb2_queue; |
165 | |
166 | /** |
167 | * struct vb2_buffer - represents a video buffer |
168 | * @v4l2_buf: struct v4l2_buffer associated with this buffer; can |
169 | * be read by the driver and relevant entries can be |
170 | * changed by the driver in case of CAPTURE types |
171 | * (such as timestamp) |
172 | * @v4l2_planes: struct v4l2_planes associated with this buffer; can |
173 | * be read by the driver and relevant entries can be |
174 | * changed by the driver in case of CAPTURE types |
175 | * (such as bytesused); NOTE that even for single-planar |
176 | * types, the v4l2_planes[0] struct should be used |
177 | * instead of v4l2_buf for filling bytesused - drivers |
178 | * should use the vb2_set_plane_payload() function for that |
179 | * @vb2_queue: the queue to which this driver belongs |
180 | * @num_planes: number of planes in the buffer |
181 | * on an internal driver queue |
182 | * @state: current buffer state; do not change |
183 | * @queued_entry: entry on the queued buffers list, which holds all |
184 | * buffers queued from userspace |
185 | * @done_entry: entry on the list that stores all buffers ready to |
186 | * be dequeued to userspace |
187 | * @planes: private per-plane information; do not change |
188 | */ |
189 | struct vb2_buffer { |
190 | struct v4l2_buffer v4l2_buf; |
191 | struct v4l2_plane v4l2_planes[VIDEO_MAX_PLANES]; |
192 | |
193 | struct vb2_queue *vb2_queue; |
194 | |
195 | unsigned int num_planes; |
196 | |
197 | /* Private: internal use only */ |
198 | enum vb2_buffer_state state; |
199 | |
200 | struct list_head queued_entry; |
201 | struct list_head done_entry; |
202 | |
203 | struct vb2_plane planes[VIDEO_MAX_PLANES]; |
204 | }; |
205 | |
206 | /** |
207 | * struct vb2_ops - driver-specific callbacks |
208 | * |
209 | * @queue_setup: called from VIDIOC_REQBUFS and VIDIOC_CREATE_BUFS |
210 | * handlers before memory allocation, or, if |
211 | * *num_planes != 0, after the allocation to verify a |
212 | * smaller number of buffers. Driver should return |
213 | * the required number of buffers in *num_buffers, the |
214 | * required number of planes per buffer in *num_planes; the |
215 | * size of each plane should be set in the sizes[] array |
216 | * and optional per-plane allocator specific context in the |
217 | * alloc_ctxs[] array. When called from VIDIOC_REQBUFS, |
218 | * fmt == NULL, the driver has to use the currently |
219 | * configured format and *num_buffers is the total number |
220 | * of buffers, that are being allocated. When called from |
221 | * VIDIOC_CREATE_BUFS, fmt != NULL and it describes the |
222 | * target frame format (if the format isn't valid the |
223 | * callback must return -EINVAL). In this case *num_buffers |
224 | * are being allocated additionally to q->num_buffers. |
225 | * @wait_prepare: release any locks taken while calling vb2 functions; |
226 | * it is called before an ioctl needs to wait for a new |
227 | * buffer to arrive; required to avoid a deadlock in |
228 | * blocking access type |
229 | * @wait_finish: reacquire all locks released in the previous callback; |
230 | * required to continue operation after sleeping while |
231 | * waiting for a new buffer to arrive |
232 | * @buf_init: called once after allocating a buffer (in MMAP case) |
233 | * or after acquiring a new USERPTR buffer; drivers may |
234 | * perform additional buffer-related initialization; |
235 | * initialization failure (return != 0) will prevent |
236 | * queue setup from completing successfully; optional |
237 | * @buf_prepare: called every time the buffer is queued from userspace |
238 | * and from the VIDIOC_PREPARE_BUF ioctl; drivers may |
239 | * perform any initialization required before each hardware |
240 | * operation in this callback; drivers that support |
241 | * VIDIOC_CREATE_BUFS must also validate the buffer size; |
242 | * if an error is returned, the buffer will not be queued |
243 | * in driver; optional |
244 | * @buf_finish: called before every dequeue of the buffer back to |
245 | * userspace; drivers may perform any operations required |
246 | * before userspace accesses the buffer; optional |
247 | * @buf_cleanup: called once before the buffer is freed; drivers may |
248 | * perform any additional cleanup; optional |
249 | * @start_streaming: called once to enter 'streaming' state; the driver may |
250 | * receive buffers with @buf_queue callback before |
251 | * @start_streaming is called; the driver gets the number |
252 | * of already queued buffers in count parameter; driver |
253 | * can return an error if hardware fails or not enough |
254 | * buffers has been queued, in such case all buffers that |
255 | * have been already given by the @buf_queue callback are |
256 | * invalidated. |
257 | * @stop_streaming: called when 'streaming' state must be disabled; driver |
258 | * should stop any DMA transactions or wait until they |
259 | * finish and give back all buffers it got from buf_queue() |
260 | * callback; may use vb2_wait_for_all_buffers() function |
261 | * @buf_queue: passes buffer vb to the driver; driver may start |
262 | * hardware operation on this buffer; driver should give |
263 | * the buffer back by calling vb2_buffer_done() function; |
264 | * it is allways called after calling STREAMON ioctl; |
265 | * might be called before start_streaming callback if user |
266 | * pre-queued buffers before calling STREAMON |
267 | */ |
268 | struct vb2_ops { |
269 | int (*queue_setup)(struct vb2_queue *q, const struct v4l2_format *fmt, |
270 | unsigned int *num_buffers, unsigned int *num_planes, |
271 | unsigned int sizes[], void *alloc_ctxs[]); |
272 | |
273 | void (*wait_prepare)(struct vb2_queue *q); |
274 | void (*wait_finish)(struct vb2_queue *q); |
275 | |
276 | int (*buf_init)(struct vb2_buffer *vb); |
277 | int (*buf_prepare)(struct vb2_buffer *vb); |
278 | int (*buf_finish)(struct vb2_buffer *vb); |
279 | void (*buf_cleanup)(struct vb2_buffer *vb); |
280 | |
281 | int (*start_streaming)(struct vb2_queue *q, unsigned int count); |
282 | int (*stop_streaming)(struct vb2_queue *q); |
283 | |
284 | void (*buf_queue)(struct vb2_buffer *vb); |
285 | }; |
286 | |
287 | struct v4l2_fh; |
288 | |
289 | /** |
290 | * struct vb2_queue - a videobuf queue |
291 | * |
292 | * @type: queue type (see V4L2_BUF_TYPE_* in linux/videodev2.h |
293 | * @io_modes: supported io methods (see vb2_io_modes enum) |
294 | * @io_flags: additional io flags (see vb2_fileio_flags enum) |
295 | * @lock: pointer to a mutex that protects the vb2_queue struct. The |
296 | * driver can set this to a mutex to let the v4l2 core serialize |
297 | * the queuing ioctls. If the driver wants to handle locking |
298 | * itself, then this should be set to NULL. This lock is not used |
299 | * by the videobuf2 core API. |
300 | * @owner: The filehandle that 'owns' the buffers, i.e. the filehandle |
301 | * that called reqbufs, create_buffers or started fileio. |
302 | * This field is not used by the videobuf2 core API, but it allows |
303 | * drivers to easily associate an owner filehandle with the queue. |
304 | * @ops: driver-specific callbacks |
305 | * @mem_ops: memory allocator specific callbacks |
306 | * @drv_priv: driver private data |
307 | * @buf_struct_size: size of the driver-specific buffer structure; |
308 | * "0" indicates the driver doesn't want to use a custom buffer |
309 | * structure type, so sizeof(struct vb2_buffer) will is used |
310 | * @gfp_flags: additional gfp flags used when allocating the buffers. |
311 | * Typically this is 0, but it may be e.g. GFP_DMA or __GFP_DMA32 |
312 | * to force the buffer allocation to a specific memory zone. |
313 | * |
314 | * @memory: current memory type used |
315 | * @bufs: videobuf buffer structures |
316 | * @num_buffers: number of allocated/used buffers |
317 | * @queued_list: list of buffers currently queued from userspace |
318 | * @queued_count: number of buffers owned by the driver |
319 | * @done_list: list of buffers ready to be dequeued to userspace |
320 | * @done_lock: lock to protect done_list list |
321 | * @done_wq: waitqueue for processes waiting for buffers ready to be dequeued |
322 | * @alloc_ctx: memory type/allocator-specific contexts for each plane |
323 | * @streaming: current streaming state |
324 | * @fileio: file io emulator internal data, used only if emulator is active |
325 | */ |
326 | struct vb2_queue { |
327 | enum v4l2_buf_type type; |
328 | unsigned int io_modes; |
329 | unsigned int io_flags; |
330 | struct mutex *lock; |
331 | struct v4l2_fh *owner; |
332 | |
333 | const struct vb2_ops *ops; |
334 | const struct vb2_mem_ops *mem_ops; |
335 | void *drv_priv; |
336 | unsigned int buf_struct_size; |
337 | u32 timestamp_type; |
338 | gfp_t gfp_flags; |
339 | |
340 | /* private: internal use only */ |
341 | enum v4l2_memory memory; |
342 | struct vb2_buffer *bufs[VIDEO_MAX_FRAME]; |
343 | unsigned int num_buffers; |
344 | |
345 | struct list_head queued_list; |
346 | |
347 | atomic_t queued_count; |
348 | struct list_head done_list; |
349 | spinlock_t done_lock; |
350 | wait_queue_head_t done_wq; |
351 | |
352 | void *alloc_ctx[VIDEO_MAX_PLANES]; |
353 | unsigned int plane_sizes[VIDEO_MAX_PLANES]; |
354 | |
355 | unsigned int streaming:1; |
356 | |
357 | struct vb2_fileio_data *fileio; |
358 | }; |
359 | |
360 | void *vb2_plane_vaddr(struct vb2_buffer *vb, unsigned int plane_no); |
361 | void *vb2_plane_cookie(struct vb2_buffer *vb, unsigned int plane_no); |
362 | |
363 | void vb2_buffer_done(struct vb2_buffer *vb, enum vb2_buffer_state state); |
364 | int vb2_wait_for_all_buffers(struct vb2_queue *q); |
365 | |
366 | int vb2_querybuf(struct vb2_queue *q, struct v4l2_buffer *b); |
367 | int vb2_reqbufs(struct vb2_queue *q, struct v4l2_requestbuffers *req); |
368 | |
369 | int vb2_create_bufs(struct vb2_queue *q, struct v4l2_create_buffers *create); |
370 | int vb2_prepare_buf(struct vb2_queue *q, struct v4l2_buffer *b); |
371 | |
372 | int __must_check vb2_queue_init(struct vb2_queue *q); |
373 | |
374 | void vb2_queue_release(struct vb2_queue *q); |
375 | |
376 | int vb2_qbuf(struct vb2_queue *q, struct v4l2_buffer *b); |
377 | int vb2_expbuf(struct vb2_queue *q, struct v4l2_exportbuffer *eb); |
378 | int vb2_dqbuf(struct vb2_queue *q, struct v4l2_buffer *b, bool nonblocking); |
379 | |
380 | int vb2_streamon(struct vb2_queue *q, enum v4l2_buf_type type); |
381 | int vb2_streamoff(struct vb2_queue *q, enum v4l2_buf_type type); |
382 | |
383 | int vb2_mmap(struct vb2_queue *q, struct vm_area_struct *vma); |
384 | #ifndef CONFIG_MMU |
385 | unsigned long vb2_get_unmapped_area(struct vb2_queue *q, |
386 | unsigned long addr, |
387 | unsigned long len, |
388 | unsigned long pgoff, |
389 | unsigned long flags); |
390 | #endif |
391 | unsigned int vb2_poll(struct vb2_queue *q, struct file *file, poll_table *wait); |
392 | size_t vb2_read(struct vb2_queue *q, char __user *data, size_t count, |
393 | loff_t *ppos, int nonblock); |
394 | size_t vb2_write(struct vb2_queue *q, const char __user *data, size_t count, |
395 | loff_t *ppos, int nonblock); |
396 | |
397 | /** |
398 | * vb2_is_streaming() - return streaming status of the queue |
399 | * @q: videobuf queue |
400 | */ |
401 | static inline bool vb2_is_streaming(struct vb2_queue *q) |
402 | { |
403 | return q->streaming; |
404 | } |
405 | |
406 | /** |
407 | * vb2_is_busy() - return busy status of the queue |
408 | * @q: videobuf queue |
409 | * |
410 | * This function checks if queue has any buffers allocated. |
411 | */ |
412 | static inline bool vb2_is_busy(struct vb2_queue *q) |
413 | { |
414 | return (q->num_buffers > 0); |
415 | } |
416 | |
417 | /** |
418 | * vb2_get_drv_priv() - return driver private data associated with the queue |
419 | * @q: videobuf queue |
420 | */ |
421 | static inline void *vb2_get_drv_priv(struct vb2_queue *q) |
422 | { |
423 | return q->drv_priv; |
424 | } |
425 | |
426 | /** |
427 | * vb2_set_plane_payload() - set bytesused for the plane plane_no |
428 | * @vb: buffer for which plane payload should be set |
429 | * @plane_no: plane number for which payload should be set |
430 | * @size: payload in bytes |
431 | */ |
432 | static inline void vb2_set_plane_payload(struct vb2_buffer *vb, |
433 | unsigned int plane_no, unsigned long size) |
434 | { |
435 | if (plane_no < vb->num_planes) |
436 | vb->v4l2_planes[plane_no].bytesused = size; |
437 | } |
438 | |
439 | /** |
440 | * vb2_get_plane_payload() - get bytesused for the plane plane_no |
441 | * @vb: buffer for which plane payload should be set |
442 | * @plane_no: plane number for which payload should be set |
443 | * @size: payload in bytes |
444 | */ |
445 | static inline unsigned long vb2_get_plane_payload(struct vb2_buffer *vb, |
446 | unsigned int plane_no) |
447 | { |
448 | if (plane_no < vb->num_planes) |
449 | return vb->v4l2_planes[plane_no].bytesused; |
450 | return 0; |
451 | } |
452 | |
453 | /** |
454 | * vb2_plane_size() - return plane size in bytes |
455 | * @vb: buffer for which plane size should be returned |
456 | * @plane_no: plane number for which size should be returned |
457 | */ |
458 | static inline unsigned long |
459 | vb2_plane_size(struct vb2_buffer *vb, unsigned int plane_no) |
460 | { |
461 | if (plane_no < vb->num_planes) |
462 | return vb->v4l2_planes[plane_no].length; |
463 | return 0; |
464 | } |
465 | |
466 | /* |
467 | * The following functions are not part of the vb2 core API, but are simple |
468 | * helper functions that you can use in your struct v4l2_file_operations, |
469 | * struct v4l2_ioctl_ops and struct vb2_ops. They will serialize if vb2_queue->lock |
470 | * or video_device->lock is set, and they will set and test vb2_queue->owner |
471 | * to check if the calling filehandle is permitted to do the queuing operation. |
472 | */ |
473 | |
474 | /* struct v4l2_ioctl_ops helpers */ |
475 | |
476 | int vb2_ioctl_reqbufs(struct file *file, void *priv, |
477 | struct v4l2_requestbuffers *p); |
478 | int vb2_ioctl_create_bufs(struct file *file, void *priv, |
479 | struct v4l2_create_buffers *p); |
480 | int vb2_ioctl_prepare_buf(struct file *file, void *priv, |
481 | struct v4l2_buffer *p); |
482 | int vb2_ioctl_querybuf(struct file *file, void *priv, struct v4l2_buffer *p); |
483 | int vb2_ioctl_qbuf(struct file *file, void *priv, struct v4l2_buffer *p); |
484 | int vb2_ioctl_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p); |
485 | int vb2_ioctl_streamon(struct file *file, void *priv, enum v4l2_buf_type i); |
486 | int vb2_ioctl_streamoff(struct file *file, void *priv, enum v4l2_buf_type i); |
487 | int vb2_ioctl_expbuf(struct file *file, void *priv, |
488 | struct v4l2_exportbuffer *p); |
489 | |
490 | /* struct v4l2_file_operations helpers */ |
491 | |
492 | int vb2_fop_mmap(struct file *file, struct vm_area_struct *vma); |
493 | int vb2_fop_release(struct file *file); |
494 | ssize_t vb2_fop_write(struct file *file, const char __user *buf, |
495 | size_t count, loff_t *ppos); |
496 | ssize_t vb2_fop_read(struct file *file, char __user *buf, |
497 | size_t count, loff_t *ppos); |
498 | unsigned int vb2_fop_poll(struct file *file, poll_table *wait); |
499 | #ifndef CONFIG_MMU |
500 | unsigned long vb2_fop_get_unmapped_area(struct file *file, unsigned long addr, |
501 | unsigned long len, unsigned long pgoff, unsigned long flags); |
502 | #endif |
503 | |
504 | /* struct vb2_ops helpers, only use if vq->lock is non-NULL. */ |
505 | |
506 | void vb2_ops_wait_prepare(struct vb2_queue *vq); |
507 | void vb2_ops_wait_finish(struct vb2_queue *vq); |
508 | |
509 | #endif /* _MEDIA_VIDEOBUF2_CORE_H */ |
510 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9