diff options
Diffstat (limited to 'pkgs/patches-linux-5.15/766-06-net-dsa-tag_qca-add-define-for-handling-mgmt-Etherne.patch')
| -rw-r--r-- | pkgs/patches-linux-5.15/766-06-net-dsa-tag_qca-add-define-for-handling-mgmt-Etherne.patch | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/pkgs/patches-linux-5.15/766-06-net-dsa-tag_qca-add-define-for-handling-mgmt-Etherne.patch b/pkgs/patches-linux-5.15/766-06-net-dsa-tag_qca-add-define-for-handling-mgmt-Etherne.patch new file mode 100644 index 0000000..459454e --- /dev/null +++ b/pkgs/patches-linux-5.15/766-06-net-dsa-tag_qca-add-define-for-handling-mgmt-Etherne.patch @@ -0,0 +1,110 @@ +From c2ee8181fddb293d296477f60b3eb4fa3ce4e1a6 Mon Sep 17 00:00:00 2001 +From: Ansuel Smith <ansuelsmth@gmail.com> +Date: Wed, 2 Feb 2022 01:03:25 +0100 +Subject: [PATCH 06/16] net: dsa: tag_qca: add define for handling mgmt + Ethernet packet + +Add all the required define to prepare support for mgmt read/write in +Ethernet packet. Any packet of this type has to be dropped as the only +use of these special packet is receive ack for an mgmt write request or +receive data for an mgmt read request. +A struct is used that emulates the Ethernet header but is used for a +different purpose. + +Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com> +Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> +Signed-off-by: David S. Miller <davem@davemloft.net> +--- + include/linux/dsa/tag_qca.h | 44 +++++++++++++++++++++++++++++++++++++ + net/dsa/tag_qca.c | 15 ++++++++++--- + 2 files changed, 56 insertions(+), 3 deletions(-) + +--- 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 */ +--- a/net/dsa/tag_qca.c ++++ b/net/dsa/tag_qca.c +@@ -32,10 +32,12 @@ static struct sk_buff *qca_tag_xmit(stru + + 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(struc + 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); |