diff options
| -rw-r--r-- | include/linux/dsa/tag_qca.h | 44 | ||||
| -rw-r--r-- | net/dsa/tag_qca.c | 15 |
2 files changed, 56 insertions, 3 deletions
diff --git a/include/linux/dsa/tag_qca.h b/include/linux/dsa/tag_qca.h index c02d2d39ff4a..f366422ab7a0 100644 --- a/include/linux/dsa/tag_qca.h +++ b/include/linux/dsa/tag_qca.h @@ -12,10 +12,54 @@ #define QCA_HDR_RECV_FRAME_IS_TAGGED BIT(3) #define QCA_HDR_RECV_SOURCE_PORT GENMASK(2, 0) +/* Packet type for recv */ +#define QCA_HDR_RECV_TYPE_NORMAL 0x0 +#define QCA_HDR_RECV_TYPE_MIB 0x1 +#define QCA_HDR_RECV_TYPE_RW_REG_ACK 0x2 + #define QCA_HDR_XMIT_VERSION GENMASK(15, 14) #define QCA_HDR_XMIT_PRIORITY GENMASK(13, 11) #define QCA_HDR_XMIT_CONTROL GENMASK(10, 8) #define QCA_HDR_XMIT_FROM_CPU BIT(7) #define QCA_HDR_XMIT_DP_BIT GENMASK(6, 0) +/* Packet type for xmit */ +#define QCA_HDR_XMIT_TYPE_NORMAL 0x0 +#define QCA_HDR_XMIT_TYPE_RW_REG 0x1 + +/* Check code for a valid mgmt packet. Switch will ignore the packet + * with this wrong. + */ +#define QCA_HDR_MGMT_CHECK_CODE_VAL 0x5 + +/* Specific define for in-band MDIO read/write with Ethernet packet */ +#define QCA_HDR_MGMT_SEQ_LEN 4 /* 4 byte for the seq */ +#define QCA_HDR_MGMT_COMMAND_LEN 4 /* 4 byte for the command */ +#define QCA_HDR_MGMT_DATA1_LEN 4 /* First 4 byte for the mdio data */ +#define QCA_HDR_MGMT_HEADER_LEN (QCA_HDR_MGMT_SEQ_LEN + \ + QCA_HDR_MGMT_COMMAND_LEN + \ + QCA_HDR_MGMT_DATA1_LEN) + +#define QCA_HDR_MGMT_DATA2_LEN 12 /* Other 12 byte for the mdio data */ +#define QCA_HDR_MGMT_PADDING_LEN 34 /* Padding to reach the min Ethernet packet */ + +#define QCA_HDR_MGMT_PKT_LEN (QCA_HDR_MGMT_HEADER_LEN + \ + QCA_HDR_LEN + \ + QCA_HDR_MGMT_DATA2_LEN + \ + QCA_HDR_MGMT_PADDING_LEN) + +#define QCA_HDR_MGMT_SEQ_NUM GENMASK(31, 0) /* 63, 32 */ +#define QCA_HDR_MGMT_CHECK_CODE GENMASK(31, 29) /* 31, 29 */ +#define QCA_HDR_MGMT_CMD BIT(28) /* 28 */ +#define QCA_HDR_MGMT_LENGTH GENMASK(23, 20) /* 23, 20 */ +#define QCA_HDR_MGMT_ADDR GENMASK(18, 0) /* 18, 0 */ + +/* Special struct emulating a Ethernet header */ +struct qca_mgmt_ethhdr { + u32 command; /* command bit 31:0 */ + u32 seq; /* seq 63:32 */ + u32 mdio_data; /* first 4byte mdio */ + __be16 hdr; /* qca hdr */ +} __packed; + #endif /* __TAG_QCA_H */ diff --git a/net/dsa/tag_qca.c b/net/dsa/tag_qca.c index f8df49d5956f..f17ed5be20c2 100644 --- a/net/dsa/tag_qca.c +++ b/net/dsa/tag_qca.c @@ -32,10 +32,12 @@ static struct sk_buff *qca_tag_xmit(struct sk_buff *skb, struct net_device *dev) static struct sk_buff *qca_tag_rcv(struct sk_buff *skb, struct net_device *dev) { - u8 ver; - u16 hdr; - int port; + u8 ver, pk_type; __be16 *phdr; + int port; + u16 hdr; + + BUILD_BUG_ON(sizeof(struct qca_mgmt_ethhdr) != QCA_HDR_MGMT_HEADER_LEN + QCA_HDR_LEN); if (unlikely(!pskb_may_pull(skb, QCA_HDR_LEN))) return NULL; @@ -48,6 +50,13 @@ static struct sk_buff *qca_tag_rcv(struct sk_buff *skb, struct net_device *dev) if (unlikely(ver != QCA_HDR_VERSION)) return NULL; + /* Get pk type */ + pk_type = FIELD_GET(QCA_HDR_RECV_TYPE, hdr); + + /* Ethernet MDIO read/write packet */ + if (pk_type == QCA_HDR_RECV_TYPE_RW_REG_ACK) + return NULL; + /* Remove QCA tag and recalculate checksum */ skb_pull_rcsum(skb, QCA_HDR_LEN); dsa_strip_etype_header(skb, QCA_HDR_LEN); |