1/*
 2 * Copyright(C) 2015 Linaro Limited. All rights reserved.
 3 * Author: Mathieu Poirier <mathieu.poirier@linaro.org>
 4 *
 5 * This program is free software; you can redistribute it and/or modify it
 6 * under the terms of the GNU General Public License version 2 as published by
 7 * the Free Software Foundation.
 8 *
 9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along with
15 * this program.  If not, see <http://www.gnu.org/licenses/>.
16 */
17
18#ifndef _CORESIGHT_ETM_PERF_H
19#define _CORESIGHT_ETM_PERF_H
20
 
 
 
21struct coresight_device;
22
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
23#ifdef CONFIG_CORESIGHT
24int etm_perf_symlink(struct coresight_device *csdev, bool link);
 
 
 
 
 
25
 
 
 
 
26#else
27static inline int etm_perf_symlink(struct coresight_device *csdev, bool link)
28{ return -EINVAL; }
 
 
 
 
 
 
 
29
30#endif /* CONFIG_CORESIGHT */
31
32#endif

 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;
14
15/*
16 * In both ETMv3 and v4 the maximum number of address comparator implentable
17 * is 8.  The actual number is implementation specific and will be checked
18 * when filters are applied.
19 */
20#define ETM_ADDR_CMP_MAX	8
21
22/**
23 * struct etm_filter - single instruction range or start/stop configuration.
24 * @start_addr:	The address to start tracing on.
25 * @stop_addr:	The address to stop tracing on.
26 * @type:	Is this a range or start/stop filter.
27 */
28struct etm_filter {
29	unsigned long start_addr;
30	unsigned long stop_addr;
31	enum etm_addr_type type;
32};
33
34/**
35 * struct etm_filters - set of filters for a session
36 * @etm_filter:	All the filters for this session.
37 * @nr_filters:	Number of filters
38 * @ssstatus:	Status of the start/stop logic.
39 */
40struct etm_filters {
41	struct etm_filter	etm_filter[ETM_ADDR_CMP_MAX];
42	unsigned int		nr_filters;
43	bool			ssstatus;
44};
45
46/**
47 * struct etm_event_data - Coresight specifics associated to an event
48 * @work:		Handle to free allocated memory outside IRQ context.
49 * @mask:		Hold the CPU(s) this event was set for.
50 * @snk_config:		The sink configuration.
51 * @path:		An array of path, each slot for one CPU.
52 */
53struct etm_event_data {
54	struct work_struct work;
55	cpumask_t mask;
56	void *snk_config;
57	struct list_head * __percpu *path;
58};
59
60#ifdef CONFIG_CORESIGHT
61int etm_perf_symlink(struct coresight_device *csdev, bool link);
62int etm_perf_add_symlink_sink(struct coresight_device *csdev);
63void etm_perf_del_symlink_sink(struct coresight_device *csdev);
64static inline void *etm_perf_sink_config(struct perf_output_handle *handle)
65{
66	struct etm_event_data *data = perf_get_aux(handle);
67
68	if (data)
69		return data->snk_config;
70	return NULL;
71}
72#else
73static inline int etm_perf_symlink(struct coresight_device *csdev, bool link)
74{ return -EINVAL; }
75int etm_perf_add_symlink_sink(struct coresight_device *csdev)
76{ return -EINVAL; }
77void etm_perf_del_symlink_sink(struct coresight_device *csdev) {}
78static inline void *etm_perf_sink_config(struct perf_output_handle *handle)
79{
80	return NULL;
81}
82
83#endif /* CONFIG_CORESIGHT */
84
85#endif