/*
 * Intel SST generic IPC Support
 *
 * Copyright (C) 2015, Intel Corporation. All rights reserved.
 *
 * 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.
 *
 */

#ifndef __SST_GENERIC_IPC_H
#define __SST_GENERIC_IPC_H

#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/wait.h>
#include <linux/list.h>
#include <linux/workqueue.h>
#include <linux/sched.h>

#define IPC_MAX_MAILBOX_BYTES	256

struct ipc_message {
	struct list_head list;
	u64 header;

	/* direction wrt host CPU */
	char *tx_data;
	size_t tx_size;
	char *rx_data;
	size_t rx_size;

	wait_queue_head_t waitq;
	bool pending;
	bool complete;
	bool wait;
	int errno;
};

struct sst_generic_ipc;

struct sst_plat_ipc_ops {
	void (*tx_msg)(struct sst_generic_ipc *, struct ipc_message *);
	void (*shim_dbg)(struct sst_generic_ipc *, const char *);
	void (*tx_data_copy)(struct ipc_message *, char *, size_t);
	u64  (*reply_msg_match)(u64 header, u64 *mask);
	bool (*is_dsp_busy)(struct sst_dsp *dsp);
	int (*check_dsp_lp_on)(struct sst_dsp *dsp, bool state);
};

/* SST generic IPC data */
struct sst_generic_ipc {
	struct device *dev;
	struct sst_dsp *dsp;

	/* IPC messaging */
	struct list_head tx_list;
	struct list_head rx_list;
	struct list_head empty_list;
	wait_queue_head_t wait_txq;
	struct task_struct *tx_thread;
	struct work_struct kwork;
	bool pending;
	struct ipc_message *msg;
	int tx_data_max_size;
	int rx_data_max_size;

	struct sst_plat_ipc_ops ops;
};

int sst_ipc_tx_message_wait(struct sst_generic_ipc *ipc, u64 header,
	void *tx_data, size_t tx_bytes, void *rx_data, size_t rx_bytes);

int sst_ipc_tx_message_nowait(struct sst_generic_ipc *ipc, u64 header,
	void *tx_data, size_t tx_bytes);

int sst_ipc_tx_message_nopm(struct sst_generic_ipc *ipc, u64 header,
	void *tx_data, size_t tx_bytes, void *rx_data, size_t rx_bytes);

struct ipc_message *sst_ipc_reply_find_msg(struct sst_generic_ipc *ipc,
	u64 header);

void sst_ipc_tx_msg_reply_complete(struct sst_generic_ipc *ipc,
	struct ipc_message *msg);

void sst_ipc_drop_all(struct sst_generic_ipc *ipc);
int sst_ipc_init(struct sst_generic_ipc *ipc);
void sst_ipc_fini(struct sst_generic_ipc *ipc);

#endif
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=c92816275674c1491ce228ee49aa030a5fa1be04'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/sound?id=c92816275674c1491ce228ee49aa030a5fa1be04'>sound</a>/<a href='/cgit.cgi/linux/net-next.git/commit/sound/sparc?id=c92816275674c1491ce228ee49aa030a5fa1be04'>sparc</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='c92816275674c1491ce228ee49aa030a5fa1be04'/><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'>2017-01-15 12:40:53 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-15 12:40:53 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/sparc?id=c92816275674c1491ce228ee49aa030a5fa1be04'>c92816275674c1491ce228ee49aa030a5fa1be04</a> (<a href='/cgit.cgi/linux/net-next.git/patch/sound/sparc?id=c92816275674c1491ce228ee49aa030a5fa1be04'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=c92816275674c1491ce228ee49aa030a5fa1be04'>97deb97f282c6b9f4f58e45a60ea78d1fe31df4e</a> /<a href='/cgit.cgi/linux/net-next.git/tree/sound/sparc?id=c92816275674c1491ce228ee49aa030a5fa1be04'>sound/sparc</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/sparc?id=2d5a7101a140adcf7a5d8677649847fbb2dd5a2f'>2d5a7101a140adcf7a5d8677649847fbb2dd5a2f</a> (<a href='/cgit.cgi/linux/net-next.git/diff/sound/sparc?id=c92816275674c1491ce228ee49aa030a5fa1be04&amp;id2=2d5a7101a140adcf7a5d8677649847fbb2dd5a2f'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/sparc?id=c8a6a09c1c617402cc9254b2bc8da359a0347d75'>c8a6a09c1c617402cc9254b2bc8da359a0347d75</a> (<a href='/cgit.cgi/linux/net-next.git/diff/sound/sparc?id=c92816275674c1491ce228ee49aa030a5fa1be04&amp;id2=c8a6a09c1c617402cc9254b2bc8da359a0347d75'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge tag 'char-misc-4.10-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc</div><div class='commit-msg'>Pull char/misc driver fixes from Greg KH:
 "Here are some small char/misc driver fixes for 4.10-rc4 that resolve
  some reported issues.

  The MEI driver issue resolves a lot of problems that people have been
  having, as does the mem driver fix. The other minor fixes resolve
  other reported issues.

  All of these have been in linux-next for a while"

* tag 'char-misc-4.10-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  vme: Fix wrong pointer utilization in ca91cx42_slave_get
  auxdisplay: fix new ht16k33 build errors
  ppdev: don't print a free'd string
  extcon: return error code on failure
  drivers: char: mem: Fix thinkos in kmem address checks
  mei: bus: enable OS version only for SPT and newer
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=c92816275674c1491ce228ee49aa030a5fa1be04'>Diffstat</a> (limited to 'sound/sparc')</div><table summary='diffstat' class='diffstat'>