/*
 * Copyright (C) 2023 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

syntax = "proto2";

// !!!!!!!!!!!!!!!!!!!!!!!!!!!!! DISCLAIMER !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
// The messages definition here must be in sync with atoms definitions in
// hardware/google/pixel/pixelstats/pixelatoms.proto

// C++ namespace: android.chre.metrics
package android.chre.metrics;

option optimize_for = LITE_RUNTIME;

option java_package = "android.chre";
option java_outer_classname = "Metrics";

/**
 * Logs an event indicating that a nanoapp loading has failed at the HAL.
 */
message ChreHalNanoappLoadFailed {
  // Vendor reverse domain name (expecting "com.google.pixel").
  optional string reverse_domain_name = 1;

  enum Type {
    TYPE_UNKNOWN = 0;
    // Corresponds to preloaded nanoapps on the device.
    TYPE_PRELOADED = 1;
    // Dynamic loading of a nanoapp (e.g. code download).
    TYPE_DYNAMIC = 2;
  }

  enum Reason {
    REASON_UNKNOWN = 0;
    // A generic error code that does not match any of the others.
    REASON_ERROR_GENERIC = 1;
    // Failure at the connection between HAL<->CHRE.
    REASON_CONNECTION_ERROR = 2;
    // System ran out of memory.
    REASON_OOM = 3;
    // Nanoapp did not have the right signing for loading.
    REASON_SIGNATURE_MISMATCH = 4;
  }

  // The 64-bit unique nanoapp identifier of the nanoapp that failed.
  optional int64 nanoapp_id = 2;

  // The type of the load event.
  optional Type type = 3;

  // The reason for the failure.
  optional Reason reason = 4;
}

/**
 * An enum describing a module within CHRE.
 */
enum ChreModuleType {
  CHRE_MODULE_TYPE_UNKNOWN = 0;
  CHRE_MODULE_TYPE_CHRE = 1;  // Core CHRE framework
  CHRE_MODULE_TYPE_PAL = 2;   // PAL module (could be CHPP)
  CHRE_MODULE_TYPE_NANOAPP = 3;
}

/**
 * An enum describing the CHRE PAL type.
 */
enum ChrePalType {
  CHRE_PAL_TYPE_UNKNOWN = 0;
  CHRE_PAL_TYPE_SENSOR = 1;
  CHRE_PAL_TYPE_WIFI = 2;
  CHRE_PAL_TYPE_GNSS = 3;
  CHRE_PAL_TYPE_WWAN = 4;
  CHRE_PAL_TYPE_AUDIO = 5;
  CHRE_PAL_TYPE_BLE = 6;
}

/**
 * Logs an event indicating that a CHRE PAL open has failed.
 */
message ChrePalOpenFailed {
  // Vendor reverse domain name (expecting "com.google.pixel").
  optional string reverse_domain_name = 1;

  enum Type {
    TYPE_UNKNOWN = 0;
    // Initial open when CHRE starts.
    INITIAL_OPEN = 1;
    // Any form of "reopen" event internally in the PAL.
    REOPEN = 2;
  }

  // The PAL this failure event is for.
  optional ChrePalType pal = 2;

  // The type of failure observed.
  optional Type type = 3;
}

/**
 * The type of CHRE API request.
 */
enum ChreApiType {
  CHRE_API_TYPE_UNKNOWN = 0;
  CHRE_API_TYPE_WIFI_SCAN_MONITOR = 1;
  CHRE_API_TYPE_WIFI_ACTIVE_SCAN = 2;
  CHRE_API_TYPE_WIFI_RTT_RANGING = 3;
}

/**
 * The type of CHRE API error.
 */
enum ChreError {
  CHRE_ERROR_UNKNOWN = 0;

  // No error occurred.
  CHRE_ERROR_NONE = 1;

  // An unspecified failure occurred.
  CHRE_ERROR = 2;

  // One or more supplied arguments are invalid.
  CHRE_ERROR_INVALID_ARGUMENT = 3;

  // Unable to satisfy request because the system is busy.
  CHRE_ERROR_BUSY = 4;

  // Unable to allocate memory.
  CHRE_ERROR_NO_MEMORY = 5;

  // The requested feature is not supported.
  CHRE_ERROR_NOT_SUPPORTED = 6;

  // A timeout occurred while processing the request.
  CHRE_ERROR_TIMEOUT = 7;

  // The relevant capability is disabled, for example due to a user
  // configuration that takes precedence over this request.
  CHRE_ERROR_FUNCTION_DISABLED = 8;
}

/**
 * Distribution of CHRE API error codes.
 */
message ChreApiErrorCodeDistributionTaken {
  // Vendor reverse domain name (expecting "com.google.pixel").
  optional string reverse_domain_name = 1;

  // The chreGetTime() value when this snapshot was taken, in milliseconds.
  optional int32 snapshot_chre_get_time_ms = 2;

  // The CHRE API type.
  optional ChreApiType api_type = 3;

  // Corresponds to the CHRE error code that occurred, as defined in the
  // "enum chreError" field in chre_api/chre/common.h.
  optional ChreError error_code = 4;
  optional int32 num_errors = 5;
}

/**
 * Snapshot of the dynamic memory allocated in CHRE.
 */
message ChreDynamicMemorySnapshotReported {
  // Vendor reverse domain name (expecting "com.google.pixel").
  optional string reverse_domain_name = 1;

  // The chreGetTime() value when this snapshot was taken, in milliseconds.
  optional int32 snapshot_chre_get_time_ms = 2;

  // The type of the module.
  optional ChreModuleType module_type = 3;

  // The unique 64-bit ID for a nanoapp, only used if the module_type is
  // NANOAPP. If module_type is PAL, then it represents the ChrePalType enum. If
  // the module_type is CHRE, then a zero value should be used.
  optional int64 pal_type_or_nanoapp_id = 4;

  // The max allocation amount of this module in bytes.
  optional int32 max_allocation_bytes = 5;

  // The current allocation amount of this module in bytes.
  optional int32 current_allocation_bytes = 6;
}

/**
 * Snapshot of the event queue stats in CHRE.
 */
message ChreEventQueueSnapshotReported {
  // Vendor reverse domain name (expecting "com.google.pixel").
  optional string reverse_domain_name = 1;

  // The chreGetTime() value when this snapshot was taken, in milliseconds.
  optional int32 snapshot_chre_get_time_ms = 2;

  // The maximum size the event queue got to (i.e. num pending events).
  optional int32 max_event_queue_size = 3;

  // The average size the event queue got to (i.e. num pending events).
  optional int32 mean_event_queue_size = 4;

  // The number of events that were dropped due to capacity limits.
  optional int32 num_dropped_events = 5;

  // The maximum amount of time it took for an event, from when it was received,
  // to when it was delivered to all interested modules. This value represents
  // the total delay within the CHRE subsystem.
  optional int64 max_queue_delay_us = 6;

  // The mean value of the delay in microseconds.
  optional int64 mean_queue_delay_us = 7;
}

/**
 * Indicates that a nanoapp has woken up the AP.
 */
message ChreApWakeUpOccurred {
  // Vendor reverse domain name (expecting "com.google.pixel").
  optional string reverse_domain_name = 1;

  // The 64-bit unique nanoapp identifier that describes the entity that has
  // caused an AP wake-up from CHRE. Whenever this event occurs, this means that
  // the nanoapp sent a message to the AP causing a transition between
  // suspend/wake-up.
  optional int64 nanoapp_id = 2;
}