84 lines
2.0 KiB
C
84 lines
2.0 KiB
C
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/*! \file ngknet_buff.h
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*
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* Generic data structure definitions for NGKNET packet buffer management.
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*
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*/
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/*
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* $Copyright: Copyright 2018-2020 Broadcom. All rights reserved.
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* The term 'Broadcom' refers to Broadcom Inc. and/or its subsidiaries.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* A copy of the GNU General Public License version 2 (GPLv2) can
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* be found in the LICENSES folder.$
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*/
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#ifndef NGKNET_BUFF_H
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#define NGKNET_BUFF_H
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/*! Rx buffer align size */
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#define PDMA_RXB_ALIGN 32
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/*! Rx buffer reserved size */
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#define PDMA_RXB_RESV (PDMA_RXB_ALIGN + PKT_HDR_SIZE)
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/*! Rx SKB reserved size */
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#define PDMA_SKB_RESV (PDMA_RXB_RESV + SKB_DATA_ALIGN(sizeof(struct skb_shared_info)))
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/*! Rx buffer size */
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#define PDMA_RXB_SIZE(len) (SKB_DATA_ALIGN(len + NET_SKB_PAD) + PDMA_SKB_RESV)
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/*! Rx reserved meta size */
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#define PDMA_RXB_META 64
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/*! Max page buffer size */
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#define PDMA_PAGE_BUF_MAX 2048
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/*!
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* \brief Rx buffer.
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*/
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struct pdma_rx_buf {
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/*! DMA address */
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dma_addr_t dma;
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/*! Buffer page */
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struct page *page;
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/*! Buffer page offset */
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unsigned int page_offset;
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/*! Rx SKB */
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struct sk_buff *skb;
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/*! Packet buffer point */
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struct pkt_buf *pkb;
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/*! Packet buffer adjustment */
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uint32_t adj;
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};
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/*!
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* \brief Tx buffer.
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*/
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struct pdma_tx_buf {
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/*! DMA address */
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dma_addr_t dma;
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/*! Tx buffer length */
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uint32_t len;
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/*! Tx SKB */
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struct sk_buff *skb;
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/*! Packet buffer point */
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struct pkt_buf *pkb;
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/*! Packet buffer adjustment */
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uint32_t adj;
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};
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#endif /* NGKNET_BUFF_H */
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