/*
 * Copyright (c) 2016, NVIDIA CORPORATION.  All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope 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.
 */

#ifndef __TEGRA_IVC_H

#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/types.h>

struct tegra_ivc_header;

struct tegra_ivc {
	struct device *peer;

	struct {
		struct tegra_ivc_header *channel;
		unsigned int position;
		dma_addr_t phys;
	} rx, tx;

	void (*notify)(struct tegra_ivc *ivc, void *data);
	void *notify_data;

	unsigned int num_frames;
	size_t frame_size;
};

/**
 * tegra_ivc_read_get_next_frame - Peek at the next frame to receive
 * @ivc		pointer of the IVC channel
 *
 * Peek at the next frame to be received, without removing it from
 * the queue.
 *
 * Returns a pointer to the frame, or an error encoded pointer.
 */
void *tegra_ivc_read_get_next_frame(struct tegra_ivc *ivc);

/**
 * tegra_ivc_read_advance - Advance the read queue
 * @ivc		pointer of the IVC channel
 *
 * Advance the read queue
 *
 * Returns 0, or a negative error value if failed.
 */
int tegra_ivc_read_advance(struct tegra_ivc *ivc);

/**
 * tegra_ivc_write_get_next_frame - Poke at the next frame to transmit
 * @ivc		pointer of the IVC channel
 *
 * Get access to the next frame.
 *
 * Returns a pointer to the frame, or an error encoded pointer.
 */
void *tegra_ivc_write_get_next_frame(struct tegra_ivc *ivc);

/**
 * tegra_ivc_write_advance - Advance the write queue
 * @ivc		pointer of the IVC channel
 *
 * Advance the write queue
 *
 * Returns 0, or a negative error value if failed.
 */
int tegra_ivc_write_advance(struct tegra_ivc *ivc);

/**
 * tegra_ivc_notified - handle internal messages
 * @ivc		pointer of the IVC channel
 *
 * This function must be called following every notification.
 *
 * Returns 0 if the channel is ready for communication, or -EAGAIN if a channel
 * reset is in progress.
 */
int tegra_ivc_notified(struct tegra_ivc *ivc);

/**
 * tegra_ivc_reset - initiates a reset of the shared memory state
 * @ivc		pointer of the IVC channel
 *
 * This function must be called after a channel is reserved before it is used
 * for communication. The channel will be ready for use when a subsequent call
 * to notify the remote of the channel reset.
 */
void tegra_ivc_reset(struct tegra_ivc *ivc);

size_t tegra_ivc_align(size_t size);
unsigned tegra_ivc_total_queue_size(unsigned queue_size);
int tegra_ivc_init(struct tegra_ivc *ivc, struct device *peer, void *rx,
		   dma_addr_t rx_phys, void *tx, dma_addr_t tx_phys,
		   unsigned int num_frames, size_t frame_size,
		   void (*notify)(struct tegra_ivc *ivc, void *data),
		   void *data);
void tegra_ivc_cleanup(struct tegra_ivc *ivc);

#endif /* __TEGRA_IVC_H */
gi/linux/net-next.git/commit/include?h=nds-private-remove&amp;id=df34d04a6f09ba41037e58c3df6d6fbed0ffcde9'>include</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/uapi?h=nds-private-remove&amp;id=df34d04a6f09ba41037e58c3df6d6fbed0ffcde9'>uapi</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/uapi/asm-generic?h=nds-private-remove&amp;id=df34d04a6f09ba41037e58c3df6d6fbed0ffcde9'>asm-generic</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='h' value='nds-private-remove'/><input type='hidden' name='id' value='df34d04a6f09ba41037e58c3df6d6fbed0ffcde9'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2016-10-15 12:09:13 -0700</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2016-10-15 12:09:13 -0700</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/uapi/asm-generic?h=nds-private-remove&amp;id=df34d04a6f09ba41037e58c3df6d6fbed0ffcde9'>df34d04a6f09ba41037e58c3df6d6fbed0ffcde9</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/uapi/asm-generic?id=df34d04a6f09ba41037e58c3df6d6fbed0ffcde9'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?h=nds-private-remove&amp;id=df34d04a6f09ba41037e58c3df6d6fbed0ffcde9'>13c81a36713fafc7abd74cb337860a1feb279968</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include/uapi/asm-generic?h=nds-private-remove&amp;id=df34d04a6f09ba41037e58c3df6d6fbed0ffcde9'>include/uapi/asm-generic</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/uapi/asm-generic?h=nds-private-remove&amp;id=9ffc66941df278c9f4df979b6bcf6c6ddafedd16'>9ffc66941df278c9f4df979b6bcf6c6ddafedd16</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/uapi/asm-generic?h=nds-private-remove&amp;id=df34d04a6f09ba41037e58c3df6d6fbed0ffcde9&amp;id2=9ffc66941df278c9f4df979b6bcf6c6ddafedd16'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/uapi/asm-generic?h=nds-private-remove&amp;id=a17e7d2010b44103e3b8e00d0c8c510606457bc6'>a17e7d2010b44103e3b8e00d0c8c510606457bc6</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/uapi/asm-generic?h=nds-private-remove&amp;id=df34d04a6f09ba41037e58c3df6d6fbed0ffcde9&amp;id2=a17e7d2010b44103e3b8e00d0c8c510606457bc6'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge tag 'befs-v4.9-rc1' of git://github.com/luisbg/linux-befs</div><div class='commit-msg'>Pull befs fixes from Luis de Bethencourt:
 "I recently took maintainership of the befs file system [0]. This is
  the first time I send you a git pull request, so please let me know if
  all the below is OK.

  Salah Triki and myself have been cleaning the code and fixing a few
  small bugs.

  Sorry I couldn't send this sooner in the merge window, I was waiting
  to have my GPG key signed by kernel members at ELCE in Berlin a few
  days ago."

[0] https://lkml.org/lkml/2016/7/27/502

* tag 'befs-v4.9-rc1' of git://github.com/luisbg/linux-befs: (39 commits)
  befs: befs: fix style issues in datastream.c
  befs: improve documentation in datastream.c
  befs: fix typos in datastream.c
  befs: fix typos in btree.c
  befs: fix style issues in super.c
  befs: fix comment style
  befs: add check for ag_shift in superblock
  befs: dump inode_size superblock information
  befs: remove unnecessary initialization
  befs: fix typo in befs_sb_info
  befs: add flags field to validate superblock state
  befs: fix typo in befs_find_key
  befs: remove unused BEFS_BT_PARMATCH
  fs: befs: remove ret variable
  fs: befs: remove in vain variable assignment
  fs: befs: remove unnecessary *befs_sb variable
  fs: befs: remove useless initialization to zero
  fs: befs: remove in vain variable assignment
  fs: befs: Insert NULL inode to dentry
  fs: befs: Remove useless calls to brelse in befs_find_brun_dblindirect
  ...
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=df34d04a6f09ba41037e58c3df6d6fbed0ffcde9'>Diffstat</a> (limited to 'include/uapi/asm-generic')</div><table summary='diffstat' class='diffstat'>