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