1/* SPDX-License-Identifier: GPL-2.0 */
 2/*
 3 * System Trace Module (STM) infrastructure
 4 * Copyright (c) 2014, Intel Corporation.
 5 *
 6 * STM class implements generic infrastructure for  System Trace Module devices
 7 * as defined in MIPI STPv2 specification.
 8 */
 9
10#ifndef _STM_STM_H_
11#define _STM_STM_H_
12
13struct stp_policy;
14struct stp_policy_node;
15
16struct stp_policy_node *
17stp_policy_node_lookup(struct stm_device *stm, char *s);
18void stp_policy_node_put(struct stp_policy_node *policy_node);
19void stp_policy_unbind(struct stp_policy *policy);
20
21void stp_policy_node_get_ranges(struct stp_policy_node *policy_node,
22				unsigned int *mstart, unsigned int *mend,
23				unsigned int *cstart, unsigned int *cend);
24int stp_configfs_init(void);
25void stp_configfs_exit(void);
26
27struct stp_master {
28	unsigned int	nr_free;
29	unsigned long	chan_map[0];
30};
31
32struct stm_device {
33	struct device		dev;
34	struct module		*owner;
35	struct stp_policy	*policy;
36	struct mutex		policy_mutex;
37	int			major;
38	unsigned int		sw_nmasters;
39	struct stm_data		*data;
40	struct mutex		link_mutex;
41	spinlock_t		link_lock;
42	struct list_head	link_list;
43	/* master allocation */
44	spinlock_t		mc_lock;
45	struct stp_master	*masters[0];
46};
47
48#define to_stm_device(_d)				\
49	container_of((_d), struct stm_device, dev)
50
51struct stm_output {
52	spinlock_t		lock;
53	unsigned int		master;
54	unsigned int		channel;
55	unsigned int		nr_chans;
56};
57
58struct stm_file {
59	struct stm_device	*stm;
60	struct stp_policy_node	*policy_node;
61	struct stm_output	output;
62};
63
64struct stm_device *stm_find_device(const char *name);
65void stm_put_device(struct stm_device *stm);
66
67struct stm_source_device {
68	struct device		dev;
69	struct stm_source_data	*data;
70	spinlock_t		link_lock;
71	struct stm_device __rcu	*link;
72	struct list_head	link_entry;
73	/* one output per stm_source device */
74	struct stp_policy_node	*policy_node;
75	struct stm_output	output;
76};
77
78#define to_stm_source_device(_d)				\
79	container_of((_d), struct stm_source_device, dev)
80
81#endif /* _STM_STM_H_ */