git.openwrt.org Git - openwrt/staging/dedeckeh.git/blob

   1 From 31eb6b4386ad91930417e3f5c8157a4b5e31cbd5 Mon Sep 17 00:00:00 2001
   2 From: Ansuel Smith <ansuelsmth@gmail.com>
   3 Date: Wed, 2 Feb 2022 01:03:27 +0100
   4 Subject: [PATCH 08/16] net: dsa: tag_qca: add support for handling mgmt and
   5  MIB Ethernet packet
   6
   7 Add connect/disconnect helper to assign private struct to the DSA switch.
   8 Add support for Ethernet mgmt and MIB if the DSA driver provide an handler
   9 to correctly parse and elaborate the data.
  10
  11 Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
  12 Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
  13 Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
  14 Signed-off-by: David S. Miller <davem@davemloft.net>
  15 ---
  16  include/linux/dsa/tag_qca.h |  7 +++++++
  17  net/dsa/tag_qca.c           | 39 ++++++++++++++++++++++++++++++++++---
  18  2 files changed, 43 insertions(+), 3 deletions(-)
  19
  20 diff --git a/include/linux/dsa/tag_qca.h b/include/linux/dsa/tag_qca.h
  21 index 1fff57f2937b..4359fb0221cf 100644
  22 --- a/include/linux/dsa/tag_qca.h
  23 +++ b/include/linux/dsa/tag_qca.h
  24 @@ -72,4 +72,11 @@ struct mib_ethhdr {
  25         __be16 hdr;             /* qca hdr */
  26  } __packed;
  27
  28 +struct qca_tagger_data {
  29 +       void (*rw_reg_ack_handler)(struct dsa_switch *ds,
  30 +                                  struct sk_buff *skb);
  31 +       void (*mib_autocast_handler)(struct dsa_switch *ds,
  32 +                                    struct sk_buff *skb);
  33 +};
  34 +
  35  #endif /* __TAG_QCA_H */
  36 diff --git a/net/dsa/tag_qca.c b/net/dsa/tag_qca.c
  37 index be792cf687d9..57d2e00f1e5d 100644
  38 --- a/net/dsa/tag_qca.c
  39 +++ b/net/dsa/tag_qca.c
  40 @@ -5,6 +5,7 @@
  41
  42  #include <linux/etherdevice.h>
  43  #include <linux/bitfield.h>
  44 +#include <net/dsa.h>
  45  #include <linux/dsa/tag_qca.h>
  46
  47  #include "dsa_priv.h"
  48 @@ -32,6 +33,9 @@ static struct sk_buff *qca_tag_xmit(struct sk_buff *skb, struct net_device *dev)
  49
  50  static struct sk_buff *qca_tag_rcv(struct sk_buff *skb, struct net_device *dev)
  51  {
  52 +       struct qca_tagger_data *tagger_data;
  53 +       struct dsa_port *dp = dev->dsa_ptr;
  54 +       struct dsa_switch *ds = dp->ds;
  55         u8 ver, pk_type;
  56         __be16 *phdr;
  57         int port;
  58 @@ -39,6 +43,8 @@ static struct sk_buff *qca_tag_rcv(struct sk_buff *skb, struct net_device *dev)
  59
  60         BUILD_BUG_ON(sizeof(struct qca_mgmt_ethhdr) != QCA_HDR_MGMT_HEADER_LEN + QCA_HDR_LEN);
  61
  62 +       tagger_data = ds->tagger_data;
  63 +
  64         if (unlikely(!pskb_may_pull(skb, QCA_HDR_LEN)))
  65                 return NULL;
  66
  67 @@ -53,13 +59,19 @@ static struct sk_buff *qca_tag_rcv(struct sk_buff *skb, struct net_device *dev)
  68         /* Get pk type */
  69         pk_type = FIELD_GET(QCA_HDR_RECV_TYPE, hdr);
  70
  71 -       /* Ethernet MDIO read/write packet */
  72 -       if (pk_type == QCA_HDR_RECV_TYPE_RW_REG_ACK)
  73 +       /* Ethernet mgmt read/write packet */
  74 +       if (pk_type == QCA_HDR_RECV_TYPE_RW_REG_ACK) {
  75 +               if (likely(tagger_data->rw_reg_ack_handler))
  76 +                       tagger_data->rw_reg_ack_handler(ds, skb);
  77                 return NULL;
  78 +       }
  79
  80         /* Ethernet MIB counter packet */
  81 -       if (pk_type == QCA_HDR_RECV_TYPE_MIB)
  82 +       if (pk_type == QCA_HDR_RECV_TYPE_MIB) {
  83 +               if (likely(tagger_data->mib_autocast_handler))
  84 +                       tagger_data->mib_autocast_handler(ds, skb);
  85                 return NULL;
  86 +       }
  87
  88         /* Remove QCA tag and recalculate checksum */
  89         skb_pull_rcsum(skb, QCA_HDR_LEN);
  90 @@ -75,9 +87,30 @@ static struct sk_buff *qca_tag_rcv(struct sk_buff *skb, struct net_device *dev)
  91         return skb;
  92  }
  93
  94 +static int qca_tag_connect(struct dsa_switch *ds)
  95 +{
  96 +       struct qca_tagger_data *tagger_data;
  97 +
  98 +       tagger_data = kzalloc(sizeof(*tagger_data), GFP_KERNEL);
  99 +       if (!tagger_data)
 100 +               return -ENOMEM;
 101 +
 102 +       ds->tagger_data = tagger_data;
 103 +
 104 +       return 0;
 105 +}
 106 +
 107 +static void qca_tag_disconnect(struct dsa_switch *ds)
 108 +{
 109 +       kfree(ds->tagger_data);
 110 +       ds->tagger_data = NULL;
 111 +}
 112 +
 113  static const struct dsa_device_ops qca_netdev_ops = {
 114         .name   = "qca",
 115         .proto  = DSA_TAG_PROTO_QCA,
 116 +       .connect = qca_tag_connect,
 117 +       .disconnect = qca_tag_disconnect,
 118         .xmit   = qca_tag_xmit,
 119         .rcv    = qca_tag_rcv,
 120         .needed_headroom = QCA_HDR_LEN,
 121 --
 122 2.34.1
 123