net: dsa: support tagger data and connecting device to tag protocol

Supported tagger data and connecting device to tag protocol, so that some
device specific work could be handled.

Signed-off-by: Yangbo Lu <[email protected]>

Author: yangbolu1991

include/zephyr/net/dsa_core.h

@@ -89,6 +89,9 @@ struct dsa_switch_context {
 
 	/** Number of initialized ports in the DSA switch */
 	uint8_t init_ports;
+
+	/** DSA tagger data provided by instance when connecting to tag protocol */
+	void *tagger_data;
 };
 
 /**
@@ -116,6 +119,9 @@ struct dsa_api {
 
 	/** Switch setup */
 	int (*switch_setup)(const struct dsa_switch_context *dsa_switch_ctx);
+
+	/** Connect the switch to the tag protocol */
+	int (*connect_tag_protocol)(struct dsa_switch_context *dsa_switch_ctx, int tag_proto);
 };
 
 /**

subsys/net/l2/ethernet/dsa/dsa_tag.c

@@ -60,4 +60,9 @@ void dsa_tag_setup(const struct device *dev_cpu)
 	default:
 		LOG_ERR("DSA tag protocol %d not supported", cfg->tag_proto);
 	}
+
+	if (dsa_switch_ctx->dapi->connect_tag_protocol != NULL &&
+	    dsa_switch_ctx->dapi->connect_tag_protocol(dsa_switch_ctx, cfg->tag_proto) != 0) {
+		LOG_ERR("Failed to connect tag protocol");
+	}
 }