1/* SPDX-License-Identifier: GPL-2.0 */
 2/*
 3 * Copyright(C) 2015 Linaro Limited. All rights reserved.
 4 * Author: Mathieu Poirier <mathieu.poirier@linaro.org>
 5 */
 6
 7#ifndef _CORESIGHT_ETM_PERF_H
 8#define _CORESIGHT_ETM_PERF_H
 9
10#include <linux/percpu-defs.h>
11#include "coresight-priv.h"
12
13struct coresight_device;
14struct cscfg_config_desc;
15
16/*
17 * In both ETMv3 and v4 the maximum number of address comparator implentable
18 * is 8.  The actual number is implementation specific and will be checked
19 * when filters are applied.
20 */
21#define ETM_ADDR_CMP_MAX	8
22
23/**
24 * struct etm_filter - single instruction range or start/stop configuration.
25 * @start_addr:	The address to start tracing on.
26 * @stop_addr:	The address to stop tracing on.
27 * @type:	Is this a range or start/stop filter.
28 */
29struct etm_filter {
30	unsigned long start_addr;
31	unsigned long stop_addr;
32	enum etm_addr_type type;
33};
34
35/**
36 * struct etm_filters - set of filters for a session
37 * @etm_filter:	All the filters for this session.
38 * @nr_filters:	Number of filters
39 * @ssstatus:	Status of the start/stop logic.
40 */
41struct etm_filters {
42	struct etm_filter	etm_filter[ETM_ADDR_CMP_MAX];
43	unsigned int		nr_filters;
44	bool			ssstatus;
45};
46
47/**
48 * struct etm_event_data - Coresight specifics associated to an event
49 * @work:		Handle to free allocated memory outside IRQ context.
50 * @mask:		Hold the CPU(s) this event was set for.
51 * @snk_config:		The sink configuration.
52 * @cfg_hash:		The hash id of any coresight config selected.
53 * @path:		An array of path, each slot for one CPU.
54 */
55struct etm_event_data {
56	struct work_struct work;
57	cpumask_t mask;
58	void *snk_config;
59	u32 cfg_hash;
60	struct list_head * __percpu *path;
61};
62
63#if IS_ENABLED(CONFIG_CORESIGHT)
64int etm_perf_symlink(struct coresight_device *csdev, bool link);
65int etm_perf_add_symlink_sink(struct coresight_device *csdev);
66void etm_perf_del_symlink_sink(struct coresight_device *csdev);
67static inline void *etm_perf_sink_config(struct perf_output_handle *handle)
68{
69	struct etm_event_data *data = perf_get_aux(handle);
70
71	if (data)
72		return data->snk_config;
73	return NULL;
74}
75int etm_perf_add_symlink_cscfg(struct device *dev,
76			       struct cscfg_config_desc *config_desc);
77void etm_perf_del_symlink_cscfg(struct cscfg_config_desc *config_desc);
78#else
79static inline int etm_perf_symlink(struct coresight_device *csdev, bool link)
80{ return -EINVAL; }
81int etm_perf_add_symlink_sink(struct coresight_device *csdev)
82{ return -EINVAL; }
83void etm_perf_del_symlink_sink(struct coresight_device *csdev) {}
84static inline void *etm_perf_sink_config(struct perf_output_handle *handle)
85{
86	return NULL;
87}
88int etm_perf_add_symlink_cscfg(struct device *dev,
89			       struct cscfg_config_desc *config_desc)
90{ return -EINVAL; }
91void etm_perf_del_symlink_cscfg(struct cscfg_config_desc *config_desc) {}
92
93#endif /* CONFIG_CORESIGHT */
94
95int __init etm_perf_init(void);
96void etm_perf_exit(void);
97
98#endif