target/linux/generic/backport-5.15/766-v5.18-07-net-dsa-tag_qca-add-define-for-handling-MIB-packet.patch

   1 From 18be654a4345f7d937b4bfbad74bea8093e3a93c Mon Sep 17 00:00:00 2001
   2 From: Ansuel Smith <ansuelsmth@gmail.com>
   3 Date: Wed, 2 Feb 2022 01:03:26 +0100
   4 Subject: [PATCH 07/16] net: dsa: tag_qca: add define for handling MIB packet
   5
   6 Add struct to correctly parse a mib Ethernet packet.
   7
   8 Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
   9 Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
  10 Signed-off-by: David S. Miller <davem@davemloft.net>
  11 ---
  12  include/linux/dsa/tag_qca.h | 10 ++++++++++
  13  net/dsa/tag_qca.c           |  4 ++++
  14  2 files changed, 14 insertions(+)
  15
  16 --- a/include/linux/dsa/tag_qca.h
  17 +++ b/include/linux/dsa/tag_qca.h
  18 @@ -62,4 +62,14 @@ struct qca_mgmt_ethhdr {
  19         __be16 hdr;             /* qca hdr */
  20  } __packed;
  21
  22 +enum mdio_cmd {
  23 +       MDIO_WRITE = 0x0,
  24 +       MDIO_READ
  25 +};
  26 +
  27 +struct mib_ethhdr {
  28 +       u32 data[3];            /* first 3 mib counter */
  29 +       __be16 hdr;             /* qca hdr */
  30 +} __packed;
  31 +
  32  #endif /* __TAG_QCA_H */
  33 --- a/net/dsa/tag_qca.c
  34 +++ b/net/dsa/tag_qca.c
  35 @@ -57,6 +57,10 @@ static struct sk_buff *qca_tag_rcv(struc
  36         if (pk_type == QCA_HDR_RECV_TYPE_RW_REG_ACK)
  37                 return NULL;
  38
  39 +       /* Ethernet MIB counter packet */
  40 +       if (pk_type == QCA_HDR_RECV_TYPE_MIB)
  41 +               return NULL;
  42 +
  43         /* Remove QCA tag and recalculate checksum */
  44         skb_pull_rcsum(skb, QCA_HDR_LEN);
  45         dsa_strip_etype_header(skb, QCA_HDR_LEN);