/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Applied Micro X-Gene SoC Ethernet v2 Driver
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*
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* Copyright (c) 2017, Applied Micro Circuits Corporation
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* Author(s): Iyappan Subramanian <isubramanian@apm.com>
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* Keyur Chudgar <kchudgar@apm.com>
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*/
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#ifndef __XGENE_ENET_V2_RING_H__
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#define __XGENE_ENET_V2_RING_H__
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#define XGENE_ENET_DESC_SIZE 64
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#define XGENE_ENET_NUM_DESC 256
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#define NUM_BUFS 8
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#define SLOT_EMPTY 0xfff
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#define DMATXCTRL 0xa180
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#define DMATXDESCL 0xa184
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#define DMATXDESCH 0xa1a0
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#define DMATXSTATUS 0xa188
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#define DMARXCTRL 0xa18c
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#define DMARXDESCL 0xa190
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#define DMARXDESCH 0xa1a4
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#define DMARXSTATUS 0xa194
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#define DMAINTRMASK 0xa198
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#define DMAINTERRUPT 0xa19c
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#define D_POS 62
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#define D_LEN 2
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#define E_POS 63
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#define E_LEN 1
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#define PKT_ADDRL_POS 0
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#define PKT_ADDRL_LEN 32
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#define PKT_ADDRH_POS 32
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#define PKT_ADDRH_LEN 10
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#define PKT_SIZE_POS 32
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#define PKT_SIZE_LEN 12
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#define NEXT_DESC_ADDRL_POS 0
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#define NEXT_DESC_ADDRL_LEN 32
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#define NEXT_DESC_ADDRH_POS 48
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#define NEXT_DESC_ADDRH_LEN 10
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#define TXPKTCOUNT_POS 16
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#define TXPKTCOUNT_LEN 8
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#define RXPKTCOUNT_POS 16
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#define RXPKTCOUNT_LEN 8
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#define TX_PKT_SENT BIT(0)
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#define TX_BUS_ERROR BIT(3)
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#define RX_PKT_RCVD BIT(4)
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#define RX_BUS_ERROR BIT(7)
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#define RXSTATUS_RXPKTRCVD BIT(0)
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struct xge_raw_desc {
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__le64 m0;
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__le64 m1;
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__le64 m2;
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__le64 m3;
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__le64 m4;
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__le64 m5;
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__le64 m6;
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__le64 m7;
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};
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struct pkt_info {
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struct sk_buff *skb;
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dma_addr_t dma_addr;
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void *pkt_buf;
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};
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/* software context of a descriptor ring */
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struct xge_desc_ring {
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struct net_device *ndev;
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dma_addr_t dma_addr;
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u8 head;
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u8 tail;
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union {
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void *desc_addr;
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struct xge_raw_desc *raw_desc;
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};
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struct pkt_info (*pkt_info);
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};
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static inline u64 xge_set_desc_bits(int pos, int len, u64 val)
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{
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return (val & ((1ULL << len) - 1)) << pos;
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}
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static inline u64 xge_get_desc_bits(int pos, int len, u64 src)
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{
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return (src >> pos) & ((1ULL << len) - 1);
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}
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#define SET_BITS(field, val) \
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xge_set_desc_bits(field ## _POS, field ## _LEN, val)
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#define GET_BITS(field, src) \
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xge_get_desc_bits(field ## _POS, field ## _LEN, src)
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void xge_setup_desc(struct xge_desc_ring *ring);
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void xge_update_tx_desc_addr(struct xge_pdata *pdata);
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void xge_update_rx_desc_addr(struct xge_pdata *pdata);
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void xge_intr_enable(struct xge_pdata *pdata);
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void xge_intr_disable(struct xge_pdata *pdata);
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#endif /* __XGENE_ENET_V2_RING_H__ */
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