1/* SPDX-License-Identifier: GPL-2.0-only
 2 *
 3 * Copyright (C) 2020-2021 Intel Corporation.
 4 */
 5
 6#ifndef IOSM_IPC_TRACE_H
 7#define IOSM_IPC_TRACE_H
 8
 9#include <linux/debugfs.h>
10#include <linux/relay.h>
11
12#include "iosm_ipc_chnl_cfg.h"
13#include "iosm_ipc_imem_ops.h"
14
15/**
16 * enum trace_ctrl_mode - State of trace channel
17 * @TRACE_DISABLE:	mode for disable trace
18 * @TRACE_ENABLE:	mode for enable trace
19 */
20enum trace_ctrl_mode {
21	TRACE_DISABLE = 0,
22	TRACE_ENABLE,
23};
24
25/**
26 * struct iosm_trace - Struct for trace interface
27 * @ipc_rchan:		Pointer to relay channel
28 * @ctrl_file:		Pointer to trace control file
29 * @ipc_imem:		Imem instance
30 * @dev:		Pointer to device struct
31 * @channel:		Channel instance
32 * @chl_id:		Channel Identifier
33 * @trc_mutex:		Mutex used for read and write mode
34 * @mode:		Mode for enable and disable trace
35 */
36
37struct iosm_trace {
38	struct rchan *ipc_rchan;
39	struct dentry *ctrl_file;
40	struct iosm_imem *ipc_imem;
41	struct device *dev;
42	struct ipc_mem_channel *channel;
43	enum ipc_channel_id chl_id;
44	struct mutex trc_mutex;	/* Mutex used for read and write mode */
45	enum trace_ctrl_mode mode;
46};
47
48#ifdef CONFIG_WWAN_DEBUGFS
49
50static inline bool ipc_is_trace_channel(struct iosm_imem *ipc_mem, u16 chl_id)
51{
52	return ipc_mem->trace && ipc_mem->trace->chl_id == chl_id;
53}
54
55struct iosm_trace *ipc_trace_init(struct iosm_imem *ipc_imem);
56void ipc_trace_deinit(struct iosm_trace *ipc_trace);
57void ipc_trace_port_rx(struct iosm_imem *ipc_imem, struct sk_buff *skb);
58
59#else
60
61static inline bool ipc_is_trace_channel(struct iosm_imem *ipc_mem, u16 chl_id)
62{
63	return false;
64}
65
66static inline void ipc_trace_port_rx(struct iosm_imem *ipc_imem,
67				     struct sk_buff *skb)
68{
69	dev_kfree_skb(skb);
70}
71
72#endif
73
74#endif