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