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 13 struct 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 */ 28 struct 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 */ 40 struct 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 */ 53 struct 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 #if IS_ENABLED(CONFIG_CORESIGHT) 61 int etm_perf_symlink(struct coresight_device *csdev, bool link); 62 int etm_perf_add_symlink_sink(struct coresight_device *csdev); 63 void etm_perf_del_symlink_sink(struct coresight_device *csdev); 64 static 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 73 static inline int etm_perf_symlink(struct coresight_device *csdev, bool link) 74 { return -EINVAL; } 75 int etm_perf_add_symlink_sink(struct coresight_device *csdev) 76 { return -EINVAL; } 77 void etm_perf_del_symlink_sink(struct coresight_device *csdev) {} 78 static inline void *etm_perf_sink_config(struct perf_output_handle *handle) 79 { 80 return NULL; 81 } 82 83 #endif /* CONFIG_CORESIGHT */ 84 85 int __init etm_perf_init(void); 86 void __exit etm_perf_exit(void); 87 88 #endif 89