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