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 struct cscfg_config_desc; 15 16 /* 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. 20 */ 21 #define ETM_ADDR_CMP_MAX 8 22 23 /** 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. 28 */ 29 struct etm_filter { 30 unsigned long start_addr; 31 unsigned long stop_addr; 32 enum etm_addr_type type; 33 }; 34 35 /** 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. 40 */ 41 struct etm_filters { 42 struct etm_filter etm_filter[ETM_ADDR_CMP_MAX]; 43 unsigned int nr_filters; 44 bool ssstatus; 45 }; 46 47 /** 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 * @snk_config: The sink configuration. 52 * @cfg_hash: The hash id of any coresight config selected. 53 * @path: An array of path, each slot for one CPU. 54 */ 55 struct etm_event_data { 56 struct work_struct work; 57 cpumask_t mask; 58 void *snk_config; 59 u32 cfg_hash; 60 struct list_head * __percpu *path; 61 }; 62 63 #if IS_ENABLED(CONFIG_CORESIGHT) 64 int etm_perf_symlink(struct coresight_device *csdev, bool link); 65 int etm_perf_add_symlink_sink(struct coresight_device *csdev); 66 void etm_perf_del_symlink_sink(struct coresight_device *csdev); 67 static inline void *etm_perf_sink_config(struct perf_output_handle *handle) 68 { 69 struct etm_event_data *data = perf_get_aux(handle); 70 71 if (data) 72 return data->snk_config; 73 return NULL; 74 } 75 int etm_perf_add_symlink_cscfg(struct device *dev, 76 struct cscfg_config_desc *config_desc); 77 void etm_perf_del_symlink_cscfg(struct cscfg_config_desc *config_desc); 78 #else 79 static inline int etm_perf_symlink(struct coresight_device *csdev, bool link) 80 { return -EINVAL; } 81 int etm_perf_add_symlink_sink(struct coresight_device *csdev) 82 { return -EINVAL; } 83 void etm_perf_del_symlink_sink(struct coresight_device *csdev) {} 84 static inline void *etm_perf_sink_config(struct perf_output_handle *handle) 85 { 86 return NULL; 87 } 88 int etm_perf_add_symlink_cscfg(struct device *dev, 89 struct cscfg_config_desc *config_desc) 90 { return -EINVAL; } 91 void etm_perf_del_symlink_cscfg(struct cscfg_config_desc *config_desc) {} 92 93 #endif /* CONFIG_CORESIGHT */ 94 95 int __init etm_perf_init(void); 96 void etm_perf_exit(void); 97 98 #endif 99