From: Tristram Ha <tristram...@microchip.com>
KSZ9893 switch is similar to KSZ9477 switch except the ingress tail tag
has 1 byte instead of 2 bytes. The size of the portmap is smaller and
so the override and lookup bits are also moved.
Signed-off-by: Tristram Ha <tristram...@microchip.com>
---
include/net/dsa.h | 1 +
net/dsa/dsa.c | 2 ++
net/dsa/dsa_priv.h | 1 +
net/dsa/tag_ksz.c | 34 ++++++++++++++++++++++++++++++++++
4 files changed, 38 insertions(+)
diff --git a/include/net/dsa.h b/include/net/dsa.h
index e8ac5b3..ae480bb 100644
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -38,6 +38,7 @@ enum dsa_tag_protocol {
DSA_TAG_PROTO_EDSA,
DSA_TAG_PROTO_GSWIP,
DSA_TAG_PROTO_KSZ9477,
+ DSA_TAG_PROTO_KSZ9893,
DSA_TAG_PROTO_LAN9303,
DSA_TAG_PROTO_MTK,
DSA_TAG_PROTO_QCA,
diff --git a/net/dsa/dsa.c b/net/dsa/dsa.c
index aee909b..36de4f2 100644
--- a/net/dsa/dsa.c
+++ b/net/dsa/dsa.c
@@ -57,6 +57,7 @@ static struct sk_buff *dsa_slave_notag_xmit(struct sk_buff
*skb,
#endif
#ifdef CONFIG_NET_DSA_TAG_KSZ9477
[DSA_TAG_PROTO_KSZ9477] = &ksz9477_netdev_ops,
+ [DSA_TAG_PROTO_KSZ9893] = &ksz9893_netdev_ops,
#endif
#ifdef CONFIG_NET_DSA_TAG_LAN9303
[DSA_TAG_PROTO_LAN9303] = &lan9303_netdev_ops,
@@ -93,6 +94,7 @@ const char *dsa_tag_protocol_to_str(const struct
dsa_device_ops *ops)
#endif
#ifdef CONFIG_NET_DSA_TAG_KSZ9477
[DSA_TAG_PROTO_KSZ9477] = "ksz9477",
+ [DSA_TAG_PROTO_KSZ9893] = "ksz9893",
#endif
#ifdef CONFIG_NET_DSA_TAG_LAN9303
[DSA_TAG_PROTO_LAN9303] = "lan9303",
diff --git a/net/dsa/dsa_priv.h b/net/dsa/dsa_priv.h
index c6caa58..093b7d1 100644
--- a/net/dsa/dsa_priv.h
+++ b/net/dsa/dsa_priv.h
@@ -216,6 +216,7 @@ static inline struct dsa_port *dsa_slave_to_port(const
struct net_device *dev)
/* tag_ksz.c */
extern const struct dsa_device_ops ksz9477_netdev_ops;
+extern const struct dsa_device_ops ksz9893_netdev_ops;
/* tag_lan9303.c */
extern const struct dsa_device_ops lan9303_netdev_ops;
diff --git a/net/dsa/tag_ksz.c b/net/dsa/tag_ksz.c
index 927e9c8..de246c9 100644
--- a/net/dsa/tag_ksz.c
+++ b/net/dsa/tag_ksz.c
@@ -16,6 +16,7 @@
/* Typically only one byte is used for tail tag. */
#define KSZ_EGRESS_TAG_LEN 1
+#define KSZ_INGRESS_TAG_LEN 1
static struct sk_buff *ksz_common_xmit(struct sk_buff *skb,
struct net_device *dev, int len)
@@ -141,3 +142,36 @@ static struct sk_buff *ksz9477_rcv(struct sk_buff *skb,
struct net_device *dev,
.rcv = ksz9477_rcv,
.overhead = KSZ9477_INGRESS_TAG_LEN,
};
+
+#define KSZ9893_TAIL_TAG_OVERRIDE BIT(5)
+#define KSZ9893_TAIL_TAG_LOOKUP BIT(6)
+
+static struct sk_buff *ksz9893_xmit(struct sk_buff *skb,
+ struct net_device *dev)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct sk_buff *nskb;
+ u8 *addr;
+ u8 *tag;
+
+ nskb = ksz_common_xmit(skb, dev, KSZ_INGRESS_TAG_LEN);
+ if (!nskb)
+ return NULL;
+
+ /* Tag encoding */
+ tag = skb_put(nskb, KSZ_INGRESS_TAG_LEN);
+ addr = skb_mac_header(nskb);
+
+ *tag = BIT(dp->index);
+
+ if (is_link_local_ether_addr(addr))
+ *tag |= KSZ9893_TAIL_TAG_OVERRIDE;
+
+ return nskb;
+}
+
+const struct dsa_device_ops ksz9893_netdev_ops = {
+ .xmit = ksz9893_xmit,
+ .rcv = ksz9477_rcv,
+ .overhead = KSZ_INGRESS_TAG_LEN,
+};
--
1.9.1
