dsa: Add TAG protocol to tag ops

In order that we can match the tagging protocol a switch driver
request to the tagger, we need to know what protocol the tagger
supports. Add this information to the ops structure.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>

v2
More tag protocol to end of structure to keep hot members at the beginning.
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/dsa.h

@@ -70,6 +70,7 @@ struct dsa_device_ops {
 			    int *offset);
 	unsigned int overhead;
 	const char *name;
+	enum dsa_tag_protocol proto;
 };
 
 #define DSA_TAG_DRIVER_ALIAS "dsa_tag-"

net/dsa/dsa.c

@@ -36,6 +36,7 @@ static struct sk_buff *dsa_slave_notag_xmit(struct sk_buff *skb,
 
 static const struct dsa_device_ops none_ops = {
 	.name	= "none",
+	.proto	= DSA_TAG_PROTO_NONE,
 	.xmit	= dsa_slave_notag_xmit,
 	.rcv	= NULL,
 };

net/dsa/tag_brcm.c

@@ -169,6 +169,7 @@ static struct sk_buff *brcm_tag_rcv(struct sk_buff *skb, struct net_device *dev,
 
 const struct dsa_device_ops brcm_netdev_ops = {
 	.name	= "brcm",
+	.proto	= DSA_TAG_PROTO_BRCM,
 	.xmit	= brcm_tag_xmit,
 	.rcv	= brcm_tag_rcv,
 	.overhead = BRCM_TAG_LEN,
@@ -195,6 +196,7 @@ static struct sk_buff *brcm_tag_rcv_prepend(struct sk_buff *skb,
 
 const struct dsa_device_ops brcm_prepend_netdev_ops = {
 	.name	= "brcm-prepend",
+	.proto	= DSA_TAG_PROTO_BRCM_PREPEND,
 	.xmit	= brcm_tag_xmit_prepend,
 	.rcv	= brcm_tag_rcv_prepend,
 	.overhead = BRCM_TAG_LEN,

net/dsa/tag_dsa.c

@@ -152,6 +152,7 @@ static int dsa_tag_flow_dissect(const struct sk_buff *skb, __be16 *proto,
 
 const struct dsa_device_ops dsa_netdev_ops = {
 	.name	= "dsa",
+	.proto	= DSA_TAG_PROTO_DSA,
 	.xmit	= dsa_xmit,
 	.rcv	= dsa_rcv,
 	.flow_dissect   = dsa_tag_flow_dissect,

net/dsa/tag_edsa.c

@@ -171,6 +171,7 @@ static int edsa_tag_flow_dissect(const struct sk_buff *skb, __be16 *proto,
 
 const struct dsa_device_ops edsa_netdev_ops = {
 	.name	= "edsa",
+	.proto	= DSA_TAG_PROTO_EDSA,
 	.xmit	= edsa_xmit,
 	.rcv	= edsa_rcv,
 	.flow_dissect   = edsa_tag_flow_dissect,

net/dsa/tag_gswip.c

@@ -105,6 +105,7 @@ static struct sk_buff *gswip_tag_rcv(struct sk_buff *skb,
 
 const struct dsa_device_ops gswip_netdev_ops = {
 	.name = "gwsip",
+	.proto	= DSA_TAG_PROTO_GSWIP,
 	.xmit = gswip_tag_xmit,
 	.rcv = gswip_tag_rcv,
 	.overhead = GSWIP_RX_HEADER_LEN,

net/dsa/tag_ksz.c

@@ -135,6 +135,7 @@ static struct sk_buff *ksz9477_rcv(struct sk_buff *skb, struct net_device *dev,
 
 const struct dsa_device_ops ksz9477_netdev_ops = {
 	.name	= "ksz9477",
+	.proto	= DSA_TAG_PROTO_KSZ9477,
 	.xmit	= ksz9477_xmit,
 	.rcv	= ksz9477_rcv,
 	.overhead = KSZ9477_INGRESS_TAG_LEN,
@@ -171,6 +172,7 @@ static struct sk_buff *ksz9893_xmit(struct sk_buff *skb,
 
 const struct dsa_device_ops ksz9893_netdev_ops = {
 	.name	= "ksz9893",
+	.proto	= DSA_TAG_PROTO_KSZ9893,
 	.xmit	= ksz9893_xmit,
 	.rcv	= ksz9477_rcv,
 	.overhead = KSZ_INGRESS_TAG_LEN,

net/dsa/tag_lan9303.c

@@ -130,6 +130,7 @@ static struct sk_buff *lan9303_rcv(struct sk_buff *skb, struct net_device *dev,
 
 const struct dsa_device_ops lan9303_netdev_ops = {
 	.name = "lan9303",
+	.proto	= DSA_TAG_PROTO_LAN9303,
 	.xmit = lan9303_xmit,
 	.rcv = lan9303_rcv,
 	.overhead = LAN9303_TAG_LEN,

net/dsa/tag_mtk.c

@@ -100,6 +100,7 @@ static int mtk_tag_flow_dissect(const struct sk_buff *skb, __be16 *proto,
 
 const struct dsa_device_ops mtk_netdev_ops = {
 	.name		= "mtk",
+	.proto		= DSA_TAG_PROTO_MTK,
 	.xmit		= mtk_tag_xmit,
 	.rcv		= mtk_tag_rcv,
 	.flow_dissect	= mtk_tag_flow_dissect,

net/dsa/tag_qca.c

@@ -101,6 +101,7 @@ static int qca_tag_flow_dissect(const struct sk_buff *skb, __be16 *proto,
 
 const struct dsa_device_ops qca_netdev_ops = {
 	.name	= "qca",
+	.proto	= DSA_TAG_PROTO_QCA,
 	.xmit	= qca_tag_xmit,
 	.rcv	= qca_tag_rcv,
 	.flow_dissect = qca_tag_flow_dissect,

net/dsa/tag_trailer.c

@@ -79,6 +79,7 @@ static struct sk_buff *trailer_rcv(struct sk_buff *skb, struct net_device *dev,
 
 const struct dsa_device_ops trailer_netdev_ops = {
 	.name	= "trailer",
+	.proto	= DSA_TAG_PROTO_TRAILER,
 	.xmit	= trailer_xmit,
 	.rcv	= trailer_rcv,
 	.overhead = 4,