[media] videobuf2-core.h: move function descriptions from c file

	return 0;

}

/**

 * vb2_buffer_in_use() - return true if the buffer is in use and

 * the queue cannot be freed (by the means of REQBUFS(0)) call

 */

bool vb2_buffer_in_use(struct vb2_queue *q, struct vb2_buffer *vb)

{

	unsigned int plane;

	return false;

}

/**

 * vb2_core_querybuf() - query video buffer information

 * @q:		videobuf queue

 * @index:	id number of the buffer

 * @pb:		buffer struct passed from userspace

 *

 * Should be called from vidioc_querybuf ioctl handler in driver.

 * The passed buffer should have been verified.

 * This function fills the relevant information for the userspace.

 */

void vb2_core_querybuf(struct vb2_queue *q, unsigned int index, void *pb)

{

	call_void_bufop(q, fill_user_buffer, q->bufs[index], pb);

	return 0;

}

/**

 * vb2_verify_memory_type() - Check whether the memory type and buffer type

 * passed to a buffer operation are compatible with the queue.

 */

int vb2_verify_memory_type(struct vb2_queue *q,

		enum vb2_memory memory, unsigned int type)

{

}

EXPORT_SYMBOL(vb2_verify_memory_type);

/**

 * vb2_core_reqbufs() - Initiate streaming

 * @q:		videobuf2 queue

 * @memory: memory type

 * @count: requested buffer count

 *

 * Should be called from vidioc_reqbufs ioctl handler of a driver.

 * This function:

 * 1) verifies streaming parameters passed from the userspace,

 * 2) sets up the queue,

 * 3) negotiates number of buffers and planes per buffer with the driver

 *    to be used during streaming,

 * 4) allocates internal buffer structures (struct vb2_buffer), according to

 *    the agreed parameters,

 * 5) for MMAP memory type, allocates actual video memory, using the

 *    memory handling/allocation routines provided during queue initialization

 *

 * If req->count is 0, all the memory will be freed instead.

 * If the queue has been allocated previously (by a previous vb2_reqbufs) call

 * and the queue is not busy, memory will be reallocated.

 *

 * The return values from this function are intended to be directly returned

 * from vidioc_reqbufs handler in driver.

 */

int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory,

		unsigned int *count)

{

}

EXPORT_SYMBOL_GPL(vb2_core_reqbufs);

/**

 * vb2_core_create_bufs() - Allocate buffers and any required auxiliary structs

 * @q:		videobuf2 queue

 * @memory: memory type

 * @count: requested buffer count

 * @parg: parameter passed to device driver

 *

 * Should be called from vidioc_create_bufs ioctl handler of a driver.

 * This function:

 * 1) verifies parameter sanity

 * 2) calls the .queue_setup() queue operation

 * 3) performs any necessary memory allocations

 *

 * The return values from this function are intended to be directly returned

 * from vidioc_create_bufs handler in driver.

 */

int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory,

		unsigned int *count, unsigned requested_planes,

		const unsigned requested_sizes[])

}

EXPORT_SYMBOL_GPL(vb2_core_create_bufs);

/**

 * vb2_plane_vaddr() - Return a kernel virtual address of a given plane

 * @vb:		vb2_buffer to which the plane in question belongs to

 * @plane_no:	plane number for which the address is to be returned

 *

 * This function returns a kernel virtual address of a given plane if

 * such a mapping exist, NULL otherwise.

 */

void *vb2_plane_vaddr(struct vb2_buffer *vb, unsigned int plane_no)

{

	if (plane_no > vb->num_planes || !vb->planes[plane_no].mem_priv)

}

EXPORT_SYMBOL_GPL(vb2_plane_vaddr);

/**

 * vb2_plane_cookie() - Return allocator specific cookie for the given plane

 * @vb:		vb2_buffer to which the plane in question belongs to

 * @plane_no:	plane number for which the cookie is to be returned

 *

 * This function returns an allocator specific cookie for a given plane if

 * available, NULL otherwise. The allocator should provide some simple static

 * inline function, which would convert this cookie to the allocator specific

 * type that can be used directly by the driver to access the buffer. This can

 * be for example physical address, pointer to scatter list or IOMMU mapping.

 */

void *vb2_plane_cookie(struct vb2_buffer *vb, unsigned int plane_no)

{

	if (plane_no >= vb->num_planes || !vb->planes[plane_no].mem_priv)

}

EXPORT_SYMBOL_GPL(vb2_plane_cookie);

/**

 * vb2_buffer_done() - inform videobuf that an operation on a buffer is finished

 * @vb:		vb2_buffer returned from the driver

 * @state:	either VB2_BUF_STATE_DONE if the operation finished successfully,

 *		VB2_BUF_STATE_ERROR if the operation finished with an error or

 *		VB2_BUF_STATE_QUEUED if the driver wants to requeue buffers.

 *		If start_streaming fails then it should return buffers with state

 *		VB2_BUF_STATE_QUEUED to put them back into the queue.

 *

 * This function should be called by the driver after a hardware operation on

 * a buffer is finished and the buffer may be returned to userspace. The driver

 * cannot use this buffer anymore until it is queued back to it by videobuf

 * by the means of buf_queue callback. Only buffers previously queued to the

 * driver by buf_queue can be passed to this function.

 *

 * While streaming a buffer can only be returned in state DONE or ERROR.

 * The start_streaming op can also return them in case the DMA engine cannot

 * be started for some reason. In that case the buffers should be returned with

 * state QUEUED.

 */

void vb2_buffer_done(struct vb2_buffer *vb, enum vb2_buffer_state state)

{

	struct vb2_queue *q = vb->vb2_queue;

}

EXPORT_SYMBOL_GPL(vb2_buffer_done);

/**

 * vb2_discard_done() - discard all buffers marked as DONE

 * @q:		videobuf2 queue

 *

 * This function is intended to be used with suspend/resume operations. It

 * discards all 'done' buffers as they would be too old to be requested after

 * resume.

 *

 * Drivers must stop the hardware and synchronize with interrupt handlers and/or

 * delayed works before calling this function to make sure no buffer will be

 * touched by the driver and/or hardware.

 */

void vb2_discard_done(struct vb2_queue *q)

{

	struct vb2_buffer *vb;

	return ret;

}

/**

 * vb2_core_prepare_buf() - Pass ownership of a buffer from userspace

 *			to the kernel

 * @q:		videobuf2 queue

 * @index:	id number of the buffer

 * @pb:		buffer structure passed from userspace to vidioc_prepare_buf

 *		handler in driver

 *

 * Should be called from vidioc_prepare_buf ioctl handler of a driver.

 * The passed buffer should have been verified.

 * This function calls buf_prepare callback in the driver (if provided),

 * in which driver-specific buffer initialization can be performed,

 *

 * The return values from this function are intended to be directly returned

 * from vidioc_prepare_buf handler in driver.

 */

int vb2_core_prepare_buf(struct vb2_queue *q, unsigned int index, void *pb)

{

	struct vb2_buffer *vb;

	return ret;

}

/**

 * vb2_core_qbuf() - Queue a buffer from userspace

 * @q:		videobuf2 queue

 * @index:	id number of the buffer

 * @pb:		buffer structure passed from userspace to vidioc_qbuf handler

 *		in driver

 *

 * Should be called from vidioc_qbuf ioctl handler of a driver.

 * The passed buffer should have been verified.

 * This function:

 * 1) if necessary, calls buf_prepare callback in the driver (if provided), in

 *    which driver-specific buffer initialization can be performed,

 * 2) if streaming is on, queues the buffer in driver by the means of buf_queue

 *    callback for processing.

 *

 * The return values from this function are intended to be directly returned

 * from vidioc_qbuf handler in driver.

 */

int vb2_core_qbuf(struct vb2_queue *q, unsigned int index, void *pb)

{

	struct vb2_buffer *vb;

	return ret;

}

/**

 * vb2_wait_for_all_buffers() - wait until all buffers are given back to vb2

 * @q:		videobuf2 queue

 *

 * This function will wait until all buffers that have been given to the driver

 * by buf_queue() are given back to vb2 with vb2_buffer_done(). It doesn't call

 * wait_prepare, wait_finish pair. It is intended to be called with all locks

 * taken, for example from stop_streaming() callback.

 */

int vb2_wait_for_all_buffers(struct vb2_queue *q)

{

	if (!q->streaming) {

		}

}

/**

 * vb2_core_dqbuf() - Dequeue a buffer to the userspace

 * @q:		videobuf2 queue

 * @pindex:	pointer to the buffer index. May be NULL

 * @pb:		buffer structure passed from userspace to vidioc_dqbuf handler

 *		in driver

 * @nonblocking: if true, this call will not sleep waiting for a buffer if no

 *		 buffers ready for dequeuing are present. Normally the driver

 *		 would be passing (file->f_flags & O_NONBLOCK) here

 *

 * Should be called from vidioc_dqbuf ioctl handler of a driver.

 * The passed buffer should have been verified.

 * This function:

 * 1) calls buf_finish callback in the driver (if provided), in which

 *    driver can perform any additional operations that may be required before

 *    returning the buffer to userspace, such as cache sync,

 * 2) the buffer struct members are filled with relevant information for

 *    the userspace.

 *

 * The return values from this function are intended to be directly returned

 * from vidioc_dqbuf handler in driver.

 */

int vb2_core_dqbuf(struct vb2_queue *q, unsigned int *pindex, void *pb,

		   bool nonblocking)

{

}

EXPORT_SYMBOL_GPL(vb2_core_streamon);

/**

 * vb2_queue_error() - signal a fatal error on the queue

 * @q:		videobuf2 queue

 *

 * Flag that a fatal unrecoverable error has occurred and wake up all processes

 * waiting on the queue. Polling will now set POLLERR and queuing and dequeuing

 * buffers will return -EIO.

 *

 * The error flag will be cleared when cancelling the queue, either from

 * vb2_streamoff or vb2_queue_release. Drivers should thus not call this

 * function before starting the stream, otherwise the error flag will remain set

 * until the queue is released when closing the device node.

 */

void vb2_queue_error(struct vb2_queue *q)

{

	q->error = 1;

	return -EINVAL;

}

/**

 * vb2_core_expbuf() - Export a buffer as a file descriptor

 * @q:		videobuf2 queue

 * @fd:		file descriptor associated with DMABUF (set by driver) *

 * @type:	buffer type

 * @index:	id number of the buffer

 * @plane:	index of the plane to be exported, 0 for single plane queues

 * @flags:	flags for newly created file, currently only O_CLOEXEC is

 *		supported, refer to manual of open syscall for more details

 *

 * The return values from this function are intended to be directly returned

 * from vidioc_expbuf handler in driver.

 */

int vb2_core_expbuf(struct vb2_queue *q, int *fd, unsigned int type,

		unsigned int index, unsigned int plane, unsigned int flags)

{

}

EXPORT_SYMBOL_GPL(vb2_core_expbuf);

/**

 * vb2_mmap() - map video buffers into application address space

 * @q:		videobuf2 queue

 * @vma:	vma passed to the mmap file operation handler in the driver

 *

 * Should be called from mmap file operation handler of a driver.

 * This function maps one plane of one of the available video buffers to

 * userspace. To map whole video memory allocated on reqbufs, this function

 * has to be called once per each plane per each buffer previously allocated.

 *

 * When the userspace application calls mmap, it passes to it an offset returned

 * to it earlier by the means of vidioc_querybuf handler. That offset acts as

 * a "cookie", which is then used to identify the plane to be mapped.

 * This function finds a plane with a matching offset and a mapping is performed

 * by the means of a provided memory operation.

 *

 * The return values from this function are intended to be directly returned

 * from the mmap handler in driver.

 */

int vb2_mmap(struct vb2_queue *q, struct vm_area_struct *vma)

{

	unsigned long off = vma->vm_pgoff << PAGE_SHIFT;

EXPORT_SYMBOL_GPL(vb2_get_unmapped_area);

#endif

/**

 * vb2_core_queue_init() - initialize a videobuf2 queue

 * @q:		videobuf2 queue; this structure should be allocated in driver

 *

 * The vb2_queue structure should be allocated by the driver. The driver is

 * responsible of clearing it's content and setting initial values for some

 * required entries before calling this function.

 * q->ops, q->mem_ops, q->type and q->io_modes are mandatory. Please refer

 * to the struct vb2_queue description in include/media/videobuf2-core.h

 * for more information.

 */

int vb2_core_queue_init(struct vb2_queue *q)

{

	/*

static int __vb2_init_fileio(struct vb2_queue *q, int read);

static int __vb2_cleanup_fileio(struct vb2_queue *q);

/**

 * vb2_core_queue_release() - stop streaming, release the queue and free memory

 * @q:		videobuf2 queue

 *

 * This function stops streaming and performs necessary clean ups, including

 * freeing video buffer memory. The driver is responsible for freeing

 * the vb2_queue structure itself.

 */

void vb2_core_queue_release(struct vb2_queue *q)

{

	__vb2_cleanup_fileio(q);

}

EXPORT_SYMBOL_GPL(vb2_core_queue_release);

/**

 * vb2_core_poll() - implements poll userspace operation

 * @q:		videobuf2 queue

 * @file:	file argument passed to the poll file operation handler

 * @wait:	wait argument passed to the poll file operation handler

 *

 * This function implements poll file operation handler for a driver.

 * For CAPTURE queues, if a buffer is ready to be dequeued, the userspace will

 * be informed that the file descriptor of a video device is available for

 * reading.

 * For OUTPUT queues, if a buffer is ready to be dequeued, the file descriptor

 * will be reported as available for writing.

 *

 * The return values from this function are intended to be directly returned

 * from poll handler in driver.

 */

unsigned int vb2_core_poll(struct vb2_queue *q, struct file *file,

		poll_table *wait)

{