@@ -51,6 +51,7 @@ struct phylink_link_state;
#define DSA_TAG_PROTO_SEVILLE_VALUE 21
#define DSA_TAG_PROTO_BRCM_LEGACY_VALUE 22
#define DSA_TAG_PROTO_SJA1110_VALUE 23
+#define DSA_TAG_PROTO_LAN937X_VALUE 24
enum dsa_tag_protocol {
DSA_TAG_PROTO_NONE = DSA_TAG_PROTO_NONE_VALUE,
@@ -77,6 +78,7 @@ enum dsa_tag_protocol {
DSA_TAG_PROTO_OCELOT_8021Q = DSA_TAG_PROTO_OCELOT_8021Q_VALUE,
DSA_TAG_PROTO_SEVILLE = DSA_TAG_PROTO_SEVILLE_VALUE,
DSA_TAG_PROTO_SJA1110 = DSA_TAG_PROTO_SJA1110_VALUE,
+ DSA_TAG_PROTO_LAN937X = DSA_TAG_PROTO_LAN937X_VALUE,
};
struct packet_type;
@@ -87,10 +87,10 @@ config NET_DSA_TAG_MTK
Mediatek switches.
config NET_DSA_TAG_KSZ
- tristate "Tag driver for Microchip 8795/9477/9893 families of switches"
+ tristate "Tag driver for Microchip 8795/937x/9477/9893 families of switches"
help
Say Y if you want to enable support for tagging frames for the
- Microchip 8795/9477/9893 families of switches.
+ Microchip 8795/937x/9477/9893 families of switches.
config NET_DSA_TAG_RTL4_A
tristate "Tag driver for Realtek 4 byte protocol A tags"
@@ -187,10 +187,66 @@ static const struct dsa_device_ops ksz9893_netdev_ops = {
DSA_TAG_DRIVER(ksz9893_netdev_ops);
MODULE_ALIAS_DSA_TAG_DRIVER(DSA_TAG_PROTO_KSZ9893);
+/* For xmit, 2 bytes are added before FCS.
+ * ---------------------------------------------------------------------------
+ * DA(6bytes)|SA(6bytes)|....|Data(nbytes)|tag0(1byte)|tag1(1byte)|FCS(4bytes)
+ * ---------------------------------------------------------------------------
+ * tag0 : represents tag override, lookup and valid
+ * tag1 : each bit represents port (eg, 0x01=port1, 0x02=port2, 0x80=port8)
+ *
+ * For rcv, 1 byte is added before FCS.
+ * ---------------------------------------------------------------------------
+ * DA(6bytes)|SA(6bytes)|....|Data(nbytes)|tag0(1byte)|FCS(4bytes)
+ * ---------------------------------------------------------------------------
+ * tag0 : zero-based value represents port
+ * (eg, 0x00=port1, 0x02=port3, 0x07=port8)
+ */
+#define LAN937X_EGRESS_TAG_LEN 2
+
+#define LAN937X_TAIL_TAG_BLOCKING_OVERRIDE BIT(11)
+#define LAN937X_TAIL_TAG_LOOKUP BIT(12)
+#define LAN937X_TAIL_TAG_VALID BIT(13)
+#define LAN937X_TAIL_TAG_PORT_MASK 7
+
+static struct sk_buff *lan937x_xmit(struct sk_buff *skb,
+ struct net_device *dev)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ const struct ethhdr *hdr = eth_hdr(skb);
+ __be16 *tag;
+ u16 val;
+
+ tag = skb_put(skb, LAN937X_EGRESS_TAG_LEN);
+
+ val = BIT(dp->index);
+
+ if (is_link_local_ether_addr(hdr->h_dest))
+ val |= LAN937X_TAIL_TAG_BLOCKING_OVERRIDE;
+
+ /* Tail tag valid bit - This bit should always be set by the CPU*/
+ val |= LAN937X_TAIL_TAG_VALID;
+
+ *tag = cpu_to_be16(val);
+
+ return skb;
+}
+
+static const struct dsa_device_ops lan937x_netdev_ops = {
+ .name = "lan937x",
+ .proto = DSA_TAG_PROTO_LAN937X,
+ .xmit = lan937x_xmit,
+ .rcv = ksz9477_rcv,
+ .needed_tailroom = LAN937X_EGRESS_TAG_LEN,
+};
+
+DSA_TAG_DRIVER(lan937x_netdev_ops);
+MODULE_ALIAS_DSA_TAG_DRIVER(DSA_TAG_PROTO_LAN937X);
+
static struct dsa_tag_driver *dsa_tag_driver_array[] = {
&DSA_TAG_DRIVER_NAME(ksz8795_netdev_ops),
&DSA_TAG_DRIVER_NAME(ksz9477_netdev_ops),
&DSA_TAG_DRIVER_NAME(ksz9893_netdev_ops),
+ &DSA_TAG_DRIVER_NAME(lan937x_netdev_ops),
};
module_dsa_tag_drivers(dsa_tag_driver_array);
The Microchip LAN937X switches have a tagging protocol which is very similar to KSZ tagging. So that the implementation is added to tag_ksz.c and reused common APIs Signed-off-by: Prasanna Vengateshan <prasanna.vengateshan@microchip.com> --- include/net/dsa.h | 2 ++ net/dsa/Kconfig | 4 ++-- net/dsa/tag_ksz.c | 56 +++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 60 insertions(+), 2 deletions(-)