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/*
* Copyright (c) 2023 Enphase Energy
*
* SPDX-License-Identifier: Apache-2.0
*/
#ifndef ETH_IVSHMEM_PRIV_H
#define ETH_IVSHMEM_PRIV_H
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <openamp/virtio_ring.h>
struct eth_ivshmem_queue {
struct {
struct vring vring;
void *shmem;
uint16_t desc_head;
uint16_t desc_len;
uint32_t data_head;
uint32_t data_tail;
uint32_t data_len;
uint16_t avail_idx;
uint16_t used_idx;
uint32_t pending_data_head;
uint32_t pending_data_len;
} tx;
struct {
struct vring vring;
void *shmem;
uint16_t avail_idx;
uint16_t used_idx;
} rx;
uint16_t desc_max_len;
uint32_t vring_header_size;
uint32_t vring_data_max_len;
};
int eth_ivshmem_queue_init(
struct eth_ivshmem_queue *q, uintptr_t shmem,
size_t shmem_section_size, bool tx_buffer_first);
void eth_ivshmem_queue_reset(struct eth_ivshmem_queue *q);
int eth_ivshmem_queue_tx_get_buff(struct eth_ivshmem_queue *q, void **data, size_t len);
int eth_ivshmem_queue_tx_commit_buff(struct eth_ivshmem_queue *q);
int eth_ivshmem_queue_rx(struct eth_ivshmem_queue *q, const void **data, size_t *len);
int eth_ivshmem_queue_rx_complete(struct eth_ivshmem_queue *q);
#endif /* ETH_IVSHMEM_PRIV_H */