1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright(C) 2015 Linaro Limited. All rights reserved.
7 #ifndef _CORESIGHT_ETM_PERF_H
8 #define _CORESIGHT_ETM_PERF_H
10 #include <linux/percpu-defs.h>
11 #include "coresight-priv.h"
13 struct coresight_device;
14 struct cscfg_config_desc;
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.
21 #define ETM_ADDR_CMP_MAX 8
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.
30 unsigned long start_addr;
31 unsigned long stop_addr;
32 enum etm_addr_type type;
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.
42 struct etm_filter etm_filter[ETM_ADDR_CMP_MAX];
43 unsigned int nr_filters;
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.
56 struct etm_event_data {
57 struct work_struct work;
59 cpumask_t aux_hwid_done;
62 struct list_head * __percpu *path;
65 #if IS_ENABLED(CONFIG_CORESIGHT)
66 int etm_perf_symlink(struct coresight_device *csdev, bool link);
67 int etm_perf_add_symlink_sink(struct coresight_device *csdev);
68 void etm_perf_del_symlink_sink(struct coresight_device *csdev);
69 static inline void *etm_perf_sink_config(struct perf_output_handle *handle)
71 struct etm_event_data *data = perf_get_aux(handle);
74 return data->snk_config;
77 int etm_perf_add_symlink_cscfg(struct device *dev,
78 struct cscfg_config_desc *config_desc);
79 void etm_perf_del_symlink_cscfg(struct cscfg_config_desc *config_desc);
81 static inline int etm_perf_symlink(struct coresight_device *csdev, bool link)
83 int etm_perf_add_symlink_sink(struct coresight_device *csdev)
85 void etm_perf_del_symlink_sink(struct coresight_device *csdev) {}
86 static inline void *etm_perf_sink_config(struct perf_output_handle *handle)
90 int etm_perf_add_symlink_cscfg(struct device *dev,
91 struct cscfg_config_desc *config_desc)
93 void etm_perf_del_symlink_cscfg(struct cscfg_config_desc *config_desc) {}
95 #endif /* CONFIG_CORESIGHT */
97 int __init etm_perf_init(void);
98 void etm_perf_exit(void);