diff options
| author |   Tristram Ha <Tristram.Ha@microchip.com> | 2019-02-28 19:57:23 -0800 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2019-03-03 13:48:49 -0800 |
| commit | 88b573af91dafd60ba35b2dc6af3f9d8d7168146 (patch) | |
| tree | b39ec77edade2efee982a910b39c2e1b5111f190 /net | |
| parent | dt-bindings: net: dsa: document additional Microchip KSZ9477 family switches (diff) | |
| download | linux-dev-88b573af91dafd60ba35b2dc6af3f9d8d7168146.tar.xz linux-dev-88b573af91dafd60ba35b2dc6af3f9d8d7168146.zip | |
net: dsa: add KSZ9893 switch tagging support
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.Ha@microchip.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/dsa/dsa.c | 2 | ||||
| -rw-r--r-- | net/dsa/dsa_priv.h | 1 | ||||
| -rw-r--r-- | net/dsa/tag_ksz.c | 34 |
3 files changed, 37 insertions, 0 deletions
diff --git a/net/dsa/dsa.c b/net/dsa/dsa.c index aee909bcddc4..36de4f2a3366 100644 --- a/net/dsa/dsa.c +++ b/net/dsa/dsa.c @@ -57,6 +57,7 @@ const struct dsa_device_ops *dsa_device_ops[DSA_TAG_LAST] = { #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 c6caa58c5c71..093b7d145eb1 100644 --- a/net/dsa/dsa_priv.h +++ b/net/dsa/dsa_priv.h @@ -216,6 +216,7 @@ extern const struct dsa_device_ops gswip_netdev_ops; /* 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 927e9c86f745..de246c93d3bb 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 @@ const struct dsa_device_ops ksz9477_netdev_ops = { .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, +}; |