120 lines
3.4 KiB
C
120 lines
3.4 KiB
C
/*
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* Copyright (C) 2022 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "application.h"
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#include "hals/common.h"
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/****************************************************************************/
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/* Magic constants
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*
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* Only Acropora knows these numbers. The AP has to ask.
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*
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* It's a pain to create multiple variable-length arrays using strictly correct
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* C, but the Weaver service is in the Nugget OS repo so we can hard-code the
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* sizes here. If it ever changes we'll use the hal.version field to distinguish
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* which one we're using.
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*
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* Still, we want to match the AIDL definitions as closely as possible, to
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* make our code easier to understand and maintain.
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*/
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#define NOS2_WEAVER_NUM_SLOTS 64
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#define NOS2_WEAVER_KEY_BYTES (128 / 8)
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#define NOS2_WEAVER_VALUE_BYTES (128 / 8)
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static_assert((NOS2_WEAVER_KEY_BYTES & 0x4) == 0,
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"NOS2_WEAVER_KEY_BYTES is not a multiple of 4");
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static_assert((NOS2_WEAVER_VALUE_BYTES & 0x4) == 0,
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"NOS2_WEAVER_VALUE_BYTES is not a multiple of 4");
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typedef uint8_t nos2_weaver_key_t[NOS2_WEAVER_KEY_BYTES];
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typedef uint8_t nos2_weaver_value_t[NOS2_WEAVER_VALUE_BYTES];
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/****************************************************************************/
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/* The command is sent separately from any data */
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enum nos2_weaver_cmd {
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NOS2_WEAVER_GET_CONFIG,
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NOS2_WEAVER_WRITE,
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NOS2_WEAVER_READ,
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NOS2_WEAVER_ERASE_VALUE,
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NOS2_WEAVER_NUM_CMDS
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};
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/****************************************************************************/
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/* Request/Response data. Both are optional and depend on the command. */
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/** NOS2_WEAVER_GET_CONFIG */
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/* There is no struct nos2_weaver_get_config_request */
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struct nos2_weaver_get_config_response {
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struct nos2_cmd_hal hal;
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uint32_t slots;
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uint32_t key_size;
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uint32_t value_size;
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};
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/** NOS2_WEAVER_WRITE */
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struct nos2_weaver_write_request {
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struct nos2_cmd_hal hal;
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uint32_t slot_id;
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nos2_weaver_key_t key;
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nos2_weaver_value_t value;
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};
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/* There is no struct nos2_weaver_write_response */
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/** NOS2_WEAVER_READ */
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struct nos2_weaver_read_request {
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struct nos2_cmd_hal hal;
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uint32_t slot_id;
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nos2_weaver_key_t key;
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};
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enum nos2_weaver_read_status {
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NOS2_WEAVER_READ_STATUS_OK,
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NOS2_WEAVER_READ_STATUS_FAILED,
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NOS2_WEAVER_READ_STATUS_INCORRECT_KEY,
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NOS2_WEAVER_READ_STATUS_THROTTLE,
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};
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struct nos2_weaver_read_response {
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struct nos2_cmd_hal hal;
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uint32_t timeout;
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uint32_t status; /* enum nos2_weaver_read_status, but of specified size */
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/* Put potentially variable-length members at the end. It's NOT, though */
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nos2_weaver_value_t value;
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};
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/** NOS2_WEAVER_ERASE_VALUE */
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struct nos2_weaver_erase_request {
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struct nos2_cmd_hal hal;
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uint32_t slot_id;
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};
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/* There is no struct nos2_weaver_erase_response */
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/****************************************************************************/
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#ifdef __cplusplus
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}
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#endif
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