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
87
88
89
|
/* 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>
#define IPC_MAX_MAILBOX_BYTES 256
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);
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
|
