1/* SPDX-License-Identifier: GPL-2.0 */
2
3#ifndef __TAG_QCA_H
4#define __TAG_QCA_H
5
6#include <linux/types.h>
7
8struct dsa_switch;
9struct sk_buff;
10
11#define QCA_HDR_LEN 2
12#define QCA_HDR_VERSION 0x2
13
14#define QCA_HDR_RECV_VERSION GENMASK(15, 14)
15#define QCA_HDR_RECV_PRIORITY GENMASK(13, 11)
16#define QCA_HDR_RECV_TYPE GENMASK(10, 6)
17#define QCA_HDR_RECV_FRAME_IS_TAGGED BIT(3)
18#define QCA_HDR_RECV_SOURCE_PORT GENMASK(2, 0)
19
20/* Packet type for recv */
21#define QCA_HDR_RECV_TYPE_NORMAL 0x0
22#define QCA_HDR_RECV_TYPE_MIB 0x1
23#define QCA_HDR_RECV_TYPE_RW_REG_ACK 0x2
24
25#define QCA_HDR_XMIT_VERSION GENMASK(15, 14)
26#define QCA_HDR_XMIT_PRIORITY GENMASK(13, 11)
27#define QCA_HDR_XMIT_CONTROL GENMASK(10, 8)
28#define QCA_HDR_XMIT_FROM_CPU BIT(7)
29#define QCA_HDR_XMIT_DP_BIT GENMASK(6, 0)
30
31/* Packet type for xmit */
32#define QCA_HDR_XMIT_TYPE_NORMAL 0x0
33#define QCA_HDR_XMIT_TYPE_RW_REG 0x1
34
35/* Check code for a valid mgmt packet. Switch will ignore the packet
36 * with this wrong.
37 */
38#define QCA_HDR_MGMT_CHECK_CODE_VAL 0x5
39
40/* Specific define for in-band MDIO read/write with Ethernet packet */
41#define QCA_HDR_MGMT_SEQ_LEN 4 /* 4 byte for the seq */
42#define QCA_HDR_MGMT_COMMAND_LEN 4 /* 4 byte for the command */
43#define QCA_HDR_MGMT_DATA1_LEN 4 /* First 4 byte for the mdio data */
44#define QCA_HDR_MGMT_HEADER_LEN (QCA_HDR_MGMT_SEQ_LEN + \
45 QCA_HDR_MGMT_COMMAND_LEN + \
46 QCA_HDR_MGMT_DATA1_LEN)
47
48#define QCA_HDR_MGMT_DATA2_LEN 28 /* Other 28 byte for the mdio data */
49#define QCA_HDR_MGMT_PADDING_LEN 18 /* Padding to reach the min Ethernet packet */
50
51#define QCA_HDR_MGMT_PKT_LEN (QCA_HDR_MGMT_HEADER_LEN + \
52 QCA_HDR_LEN + \
53 QCA_HDR_MGMT_DATA2_LEN + \
54 QCA_HDR_MGMT_PADDING_LEN)
55
56#define QCA_HDR_MGMT_SEQ_NUM GENMASK(31, 0) /* 63, 32 */
57#define QCA_HDR_MGMT_CHECK_CODE GENMASK(31, 29) /* 31, 29 */
58#define QCA_HDR_MGMT_CMD BIT(28) /* 28 */
59#define QCA_HDR_MGMT_LENGTH GENMASK(23, 20) /* 23, 20 */
60#define QCA_HDR_MGMT_ADDR GENMASK(18, 0) /* 18, 0 */
61
62/* Special struct emulating a Ethernet header */
63struct qca_mgmt_ethhdr {
64 __le32 command; /* command bit 31:0 */
65 __le32 seq; /* seq 63:32 */
66 __le32 mdio_data; /* first 4byte mdio */
67 __be16 hdr; /* qca hdr */
68} __packed;
69
70enum mdio_cmd {
71 MDIO_WRITE = 0x0,
72 MDIO_READ
73};
74
75struct mib_ethhdr {
76 __le32 data[3]; /* first 3 mib counter */
77 __be16 hdr; /* qca hdr */
78} __packed;
79
80struct qca_tagger_data {
81 void (*rw_reg_ack_handler)(struct dsa_switch *ds,
82 struct sk_buff *skb);
83 void (*mib_autocast_handler)(struct dsa_switch *ds,
84 struct sk_buff *skb);
85};
86
87#endif /* __TAG_QCA_H */
88

source code of linux/include/linux/dsa/tag_qca.h