coresight-etm-perf.h

 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 * @aux_hwid_done:	Whether a CPU has emitted the TraceID packet or not.
52 * @snk_config:		The sink configuration.
53 * @cfg_hash:		The hash id of any coresight config selected.
54 * @path:		An array of path, each slot for one CPU.
55 */
56struct etm_event_data {
57	struct work_struct work;
58	cpumask_t mask;
59	cpumask_t aux_hwid_done;
60	void *snk_config;
61	u32 cfg_hash;
62	struct coresight_path * __percpu *path;
63};
64
65int etm_perf_symlink(struct coresight_device *csdev, bool link);
66int etm_perf_add_symlink_sink(struct coresight_device *csdev);
67void etm_perf_del_symlink_sink(struct coresight_device *csdev);
68static inline void *etm_perf_sink_config(struct perf_output_handle *handle)
69{
70	struct etm_event_data *data = perf_get_aux(handle);
71
72	if (data)
73		return data->snk_config;
74	return NULL;
75}
76int etm_perf_add_symlink_cscfg(struct device *dev,
77			       struct cscfg_config_desc *config_desc);
78void etm_perf_del_symlink_cscfg(struct cscfg_config_desc *config_desc);
79int __init etm_perf_init(void);
80void etm_perf_exit(void);
81
82#endif