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/*
* (C) COPYRIGHT 2020 ARM Limited. All rights reserved.
*
* This program is free software and is provided to you under the terms of the
* GNU General Public License version 2 as published by the Free Software
* Foundation, and any use by you of this program is subject to the terms
* of such GNU licence.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, you can access it online at
* http://www.gnu.org/licenses/gpl-2.0.html.
*
* SPDX-License-Identifier: GPL-2.0-only
*/
#ifndef ETHOSU_CORE_INTERFACE_H
#define ETHOSU_CORE_INTERFACE_H
#ifdef __KERNEL__
#include <linux/types.h>
#else
#include <stdint.h>
#endif
/** Maximum number of IFM/OFM buffers per inference */
#define ETHOSU_CORE_BUFFER_MAX 16
/** Maximum number of PMU counters to be returned for inference */
#define ETHOSU_CORE_PMU_MAX 4
#define ETHOSU_CORE_MSG_MAGIC 0x41457631
#define ETHOSU_CORE_MSG_VERSION_MAJOR 0
#define ETHOSU_CORE_MSG_VERSION_MINOR 2
#define ETHOSU_CORE_MSG_VERSION_PATCH 0
/**
* enum ethosu_core_msg_type - Message types
*
* Types for the messages sent between the host and the core subsystem.
*/
enum ethosu_core_msg_type {
ETHOSU_CORE_MSG_ERR = 1,
ETHOSU_CORE_MSG_PING,
ETHOSU_CORE_MSG_PONG,
ETHOSU_CORE_MSG_INFERENCE_REQ,
ETHOSU_CORE_MSG_INFERENCE_RSP,
ETHOSU_CORE_MSG_VERSION_REQ,
ETHOSU_CORE_MSG_VERSION_RSP,
ETHOSU_CORE_MSG_MAX
};
/**
* struct ethosu_core_msg - Message header
*/
struct ethosu_core_msg {
uint32_t magic;
uint32_t type;
uint32_t length;
};
/**
* struct ethosu_core_queue_header - Message queue header
*/
struct ethosu_core_queue_header {
uint32_t size;
uint32_t read;
uint32_t write;
};
/**
* struct ethosu_core_queue - Message queue
*
* Dynamically sized message queue.
*/
struct ethosu_core_queue {
struct ethosu_core_queue_header header;
uint8_t data[];
};
enum ethosu_core_status {
ETHOSU_CORE_STATUS_OK,
ETHOSU_CORE_STATUS_ERROR
};
struct ethosu_core_buffer {
uint32_t ptr;
uint32_t size;
};
struct ethosu_core_inference_req {
uint64_t user_arg;
uint32_t ifm_count;
struct ethosu_core_buffer ifm[ETHOSU_CORE_BUFFER_MAX];
uint32_t ofm_count;
struct ethosu_core_buffer ofm[ETHOSU_CORE_BUFFER_MAX];
struct ethosu_core_buffer network;
uint8_t pmu_event_config[ETHOSU_CORE_PMU_MAX];
uint32_t pmu_cycle_counter_enable;
};
struct ethosu_core_inference_rsp {
uint64_t user_arg;
uint32_t ofm_count;
uint32_t ofm_size[ETHOSU_CORE_BUFFER_MAX];
uint32_t status;
uint8_t pmu_event_config[ETHOSU_CORE_PMU_MAX];
uint32_t pmu_event_count[ETHOSU_CORE_PMU_MAX];
uint32_t pmu_cycle_counter_enable;
uint64_t pmu_cycle_counter_count;
};
/**
* struct ethosu_core_msg_verson - Message protocol version
*/
struct ethosu_core_msg_version {
uint8_t major;
uint8_t minor;
uint8_t patch;
uint8_t _reserved;
};
/**
* enum ethosu_core_msg_err_type - Error types
*/
enum ethosu_core_msg_err_type {
ETHOSU_CORE_MSG_ERR_GENERIC = 0,
ETHOSU_CORE_MSG_ERR_UNSUPPORTED_TYPE,
ETHOSU_CORE_MSG_ERR_INVALID_PAYLOAD,
ETHOSU_CORE_MSG_ERR_INVALID_SIZE,
ETHOSU_CORE_MSG_ERR_INVALID_MAGIC,
ETHOSU_CORE_MSG_ERR_MAX
};
/**
* struct ethosu_core_msg_err - Error message struct
*/
struct ethosu_core_msg_err {
uint32_t type; /* optional use of extra error code */
char msg[128];
};
#endif
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