/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright(C) 2015 Linaro Limited. All rights reserved.
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* Author: Mathieu Poirier <mathieu.poirier@linaro.org>
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*/
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#ifndef _CORESIGHT_ETM_PERF_H
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#define _CORESIGHT_ETM_PERF_H
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#include <linux/percpu-defs.h>
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#include "coresight-priv.h"
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struct coresight_device;
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/*
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* In both ETMv3 and v4 the maximum number of address comparator implentable
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* is 8. The actual number is implementation specific and will be checked
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* when filters are applied.
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*/
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#define ETM_ADDR_CMP_MAX 8
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/**
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* struct etm_filter - single instruction range or start/stop configuration.
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* @start_addr: The address to start tracing on.
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* @stop_addr: The address to stop tracing on.
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* @type: Is this a range or start/stop filter.
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*/
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struct etm_filter {
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unsigned long start_addr;
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unsigned long stop_addr;
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enum etm_addr_type type;
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};
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/**
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* struct etm_filters - set of filters for a session
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* @etm_filter: All the filters for this session.
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* @nr_filters: Number of filters
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* @ssstatus: Status of the start/stop logic.
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*/
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struct etm_filters {
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struct etm_filter etm_filter[ETM_ADDR_CMP_MAX];
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unsigned int nr_filters;
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bool ssstatus;
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};
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/**
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* struct etm_event_data - Coresight specifics associated to an event
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* @work: Handle to free allocated memory outside IRQ context.
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* @mask: Hold the CPU(s) this event was set for.
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* @snk_config: The sink configuration.
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* @path: An array of path, each slot for one CPU.
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*/
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struct etm_event_data {
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struct work_struct work;
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cpumask_t mask;
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void *snk_config;
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struct list_head * __percpu *path;
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};
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#if IS_ENABLED(CONFIG_CORESIGHT)
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int etm_perf_symlink(struct coresight_device *csdev, bool link);
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int etm_perf_add_symlink_sink(struct coresight_device *csdev);
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void etm_perf_del_symlink_sink(struct coresight_device *csdev);
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static inline void *etm_perf_sink_config(struct perf_output_handle *handle)
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{
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struct etm_event_data *data = perf_get_aux(handle);
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if (data)
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return data->snk_config;
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return NULL;
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}
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#else
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static inline int etm_perf_symlink(struct coresight_device *csdev, bool link)
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{ return -EINVAL; }
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int etm_perf_add_symlink_sink(struct coresight_device *csdev)
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{ return -EINVAL; }
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void etm_perf_del_symlink_sink(struct coresight_device *csdev) {}
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static inline void *etm_perf_sink_config(struct perf_output_handle *handle)
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{
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return NULL;
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}
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#endif /* CONFIG_CORESIGHT */
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int __init etm_perf_init(void);
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void __exit etm_perf_exit(void);
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#endif
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