summaryrefslogtreecommitdiff
path: root/sound/soc/intel/common/sst-ipc.h
blob: 77d651e888f91e1c7c11331c900c19aa504538e3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Intel SST generic IPC Support
 *
 * Copyright (C) 2015, Intel Corporation. All rights reserved.
 */

#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>

struct sst_ipc_message {
	u64 header;
	void *data;
	size_t size;
};

struct ipc_message {
	struct list_head list;
	struct sst_ipc_message tx;
	struct sst_ipc_message rx;

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

struct sst_generic_ipc;
struct sst_dsp;

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,
	struct sst_ipc_message request, struct sst_ipc_message *reply);

int sst_ipc_tx_message_nowait(struct sst_generic_ipc *ipc,
	struct sst_ipc_message request);

int sst_ipc_tx_message_nopm(struct sst_generic_ipc *ipc,
	struct sst_ipc_message request, struct sst_ipc_message *reply);

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);

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

#endif