treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / net / ethernet / apm / xgene-v2 / ring.h
blob2fd25553d5d30c497ec7cf323f76699f51dda39f
1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3 * Applied Micro X-Gene SoC Ethernet v2 Driver
5 * Copyright (c) 2017, Applied Micro Circuits Corporation
6 * Author(s): Iyappan Subramanian <isubramanian@apm.com>
7 * Keyur Chudgar <kchudgar@apm.com>
8 */
10 #ifndef __XGENE_ENET_V2_RING_H__
11 #define __XGENE_ENET_V2_RING_H__
13 #define XGENE_ENET_DESC_SIZE 64
14 #define XGENE_ENET_NUM_DESC 256
15 #define NUM_BUFS 8
16 #define SLOT_EMPTY 0xfff
18 #define DMATXCTRL 0xa180
19 #define DMATXDESCL 0xa184
20 #define DMATXDESCH 0xa1a0
21 #define DMATXSTATUS 0xa188
22 #define DMARXCTRL 0xa18c
23 #define DMARXDESCL 0xa190
24 #define DMARXDESCH 0xa1a4
25 #define DMARXSTATUS 0xa194
26 #define DMAINTRMASK 0xa198
27 #define DMAINTERRUPT 0xa19c
29 #define D_POS 62
30 #define D_LEN 2
31 #define E_POS 63
32 #define E_LEN 1
33 #define PKT_ADDRL_POS 0
34 #define PKT_ADDRL_LEN 32
35 #define PKT_ADDRH_POS 32
36 #define PKT_ADDRH_LEN 10
37 #define PKT_SIZE_POS 32
38 #define PKT_SIZE_LEN 12
39 #define NEXT_DESC_ADDRL_POS 0
40 #define NEXT_DESC_ADDRL_LEN 32
41 #define NEXT_DESC_ADDRH_POS 48
42 #define NEXT_DESC_ADDRH_LEN 10
44 #define TXPKTCOUNT_POS 16
45 #define TXPKTCOUNT_LEN 8
46 #define RXPKTCOUNT_POS 16
47 #define RXPKTCOUNT_LEN 8
49 #define TX_PKT_SENT BIT(0)
50 #define TX_BUS_ERROR BIT(3)
51 #define RX_PKT_RCVD BIT(4)
52 #define RX_BUS_ERROR BIT(7)
53 #define RXSTATUS_RXPKTRCVD BIT(0)
55 struct xge_raw_desc {
56 __le64 m0;
57 __le64 m1;
58 __le64 m2;
59 __le64 m3;
60 __le64 m4;
61 __le64 m5;
62 __le64 m6;
63 __le64 m7;
66 struct pkt_info {
67 struct sk_buff *skb;
68 dma_addr_t dma_addr;
69 void *pkt_buf;
72 /* software context of a descriptor ring */
73 struct xge_desc_ring {
74 struct net_device *ndev;
75 dma_addr_t dma_addr;
76 u8 head;
77 u8 tail;
78 union {
79 void *desc_addr;
80 struct xge_raw_desc *raw_desc;
82 struct pkt_info (*pkt_info);
85 static inline u64 xge_set_desc_bits(int pos, int len, u64 val)
87 return (val & ((1ULL << len) - 1)) << pos;
90 static inline u64 xge_get_desc_bits(int pos, int len, u64 src)
92 return (src >> pos) & ((1ULL << len) - 1);
95 #define SET_BITS(field, val) \
96 xge_set_desc_bits(field ## _POS, field ## _LEN, val)
98 #define GET_BITS(field, src) \
99 xge_get_desc_bits(field ## _POS, field ## _LEN, src)
101 void xge_setup_desc(struct xge_desc_ring *ring);
102 void xge_update_tx_desc_addr(struct xge_pdata *pdata);
103 void xge_update_rx_desc_addr(struct xge_pdata *pdata);
104 void xge_intr_enable(struct xge_pdata *pdata);
105 void xge_intr_disable(struct xge_pdata *pdata);
107 #endif /* __XGENE_ENET_V2_RING_H__ */