1ef9bff461
Add RealyFS framework wrappers support to transfer large amount of data between kernel space and user space. Change-Id: Ic88848b003a2fc2c216b74a185f6bd46d5ddd1cd CRs-Fixed: 2327607
114 linhas
3.4 KiB
C
114 linhas
3.4 KiB
C
/*
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* Copyright (c) 2018 The Linux Foundation. All rights reserved.
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*
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* Permission to use, copy, modify, and/or distribute this software for
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* any purpose with or without fee is hereby granted, provided that the
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* above copyright notice and this permission notice appear in all
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* copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
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* WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
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* AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
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* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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/**
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* DOC: qal_streamfs
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* Qualcomm abstraction layer (QAL) stream file system APIs
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*/
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#if !defined(__QAL_STREAMFS_H)
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#define _QAL_STREAMFS_H
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/* Include Files */
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#include <qdf_types.h>
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struct qal_streamfs_chan;
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struct qal_dentry_t;
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struct qal_streamfs_chan_callbacks;
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struct qal_streamfs_chan_buf;
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/**
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* qal_streamfs_open() - Create streamfs channel for data trasfer
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* @base_filename: base name of files to create, %NULL for buffering only
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* @parent: dentry of parent directory, %NULL for root directory
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* @subbuf_size: size of sub-buffers
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* @n_subbufs: number of sub-buffers
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* @cb: streamfs channel callback functions
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* @private_data: user-defined data
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*
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* Returns channel pointer if successful, %NULL otherwise.
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*/
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struct qal_streamfs_chan *
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qal_streamfs_open(const char *base_filename,
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struct qal_dentry_t *parent,
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size_t subbuf_size, size_t n_subbufs,
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struct qal_streamfs_chan_callbacks *cb,
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void *private_data);
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/**
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* qal_streamfs_close() - Closes all channel buffers and frees the channel.
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* @chan: pointer to qal_streamfs_chan.
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*
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* Returns NONE
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*/
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void qal_streamfs_close(struct qal_streamfs_chan *chan);
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/**
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* qal_streamfs_flush() - Flushes all channel buffers.
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* @chan: pointer to qal_streamfs_chan.
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*
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* Returns NONE
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*/
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void qal_streamfs_flush(struct qal_streamfs_chan *chan);
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/**
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* qal_streamfs_reset - reset streamfs channel
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* This erases data from all channel buffers and restarting the channel
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* in its initial state.
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* The buffers are not freed, so any mappings are still in effect.
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* @chan: pointer to qal_streamfs_chan.
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*
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* Returns NONE
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*/
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void qal_streamfs_reset(struct qal_streamfs_chan *chan);
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/**
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* qal_streamfs_subbufs_consumed - update the buffer's sub-buffers-consumed
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* count
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* @chan: pointer to qal_streamfs_chan.
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* @cpu: the cpu associated with the channel buffer to update
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* @subbufs_consumed: number of sub-buffers to add to current buf's count
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*
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* Returns NONE
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*/
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void qal_streamfs_subbufs_consumed(struct qal_streamfs_chan *chan,
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unsigned int cpu,
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size_t consumed);
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/**
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* qal_streamfs_write - write data into the channel
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* @chan: relay channel
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* @data: data to be written
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* @length: number of bytes to write
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*
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* Writes data into the current cpu's channel buffer.
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*/
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inline void qal_streamfs_write(struct qal_streamfs_chan *chan,
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const void *data,
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size_t length);
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/**
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* qal_streamfs_buf_full - boolean, is the channel buffer full?
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* @buf: channel buffer
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*
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* Returns 1 if the buffer is full, 0 otherwise.
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*/
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int qal_streamfs_buf_full(struct qal_streamfs_chan_buf *buf);
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#endif
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