drivers/hwtracing/coresight/coresight-etm-perf.h

   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  * @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.
  55  */
  56 struct etm_event_data {
  57         struct work_struct work;
  58         cpumask_t mask;
  59         cpumask_t aux_hwid_done;
  60         void *snk_config;
  61         u32 cfg_hash;
  62         struct list_head * __percpu *path;
  63 };
  64
  65 int etm_perf_symlink(struct coresight_device *csdev, bool link);
  66 int etm_perf_add_symlink_sink(struct coresight_device *csdev);
  67 void etm_perf_del_symlink_sink(struct coresight_device *csdev);
  68 static inline void *etm_perf_sink_config(struct perf_output_handle *handle)
  69 {
  70         struct etm_event_data *data = perf_get_aux(handle);
  71
  72         if (data)
  73                 return data->snk_config;
  74         return NULL;
  75 }
  76 int etm_perf_add_symlink_cscfg(struct device *dev,
  77                                struct cscfg_config_desc *config_desc);
  78 void etm_perf_del_symlink_cscfg(struct cscfg_config_desc *config_desc);
  79 int __init etm_perf_init(void);
  80 void etm_perf_exit(void);
  81
  82 #endif