dpaa2-mac: add the MC API for reconfiguring the protocol

The MC firmware gained recently a new command which can reconfigure the
running protocol on the underlying MAC. Add this new command which will
be used in the next patches in order to do a major reconfig on the
interface.
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/freescale/dpaa2/dpmac-cmd.h

@@ -26,6 +26,8 @@
 
 #define DPMAC_CMDID_GET_COUNTER		DPMAC_CMD(0x0c4)
 
+#define DPMAC_CMDID_SET_PROTOCOL	DPMAC_CMD(0x0c7)
+
 /* Macros for accessing command fields smaller than 1byte */
 #define DPMAC_MASK(field)        \
 	GENMASK(DPMAC_##field##_SHIFT + DPMAC_##field##_SIZE - 1, \
@@ -77,4 +79,7 @@ struct dpmac_rsp_get_api_version {
 	__le16 minor;
 };
 
+struct dpmac_cmd_set_protocol {
+	u8 eth_if;
+};
 #endif /* _FSL_DPMAC_CMD_H */

drivers/net/ethernet/freescale/dpaa2/dpmac.c

@@ -212,3 +212,26 @@ int dpmac_get_api_version(struct fsl_mc_io *mc_io, u32 cmd_flags,
 
 	return 0;
 }
+
+/**
+ * dpmac_set_protocol() - Reconfigure the DPMAC protocol
+ * @mc_io:      Pointer to opaque I/O object
+ * @cmd_flags:  Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token:      Token of DPMAC object
+ * @protocol:   New protocol for the DPMAC to be reconfigured in.
+ *
+ * Return:      '0' on Success; Error code otherwise.
+ */
+int dpmac_set_protocol(struct fsl_mc_io *mc_io, u32 cmd_flags, u16 token,
+		       enum dpmac_eth_if protocol)
+{
+	struct dpmac_cmd_set_protocol *cmd_params;
+	struct fsl_mc_command cmd = { 0 };
+
+	cmd.header = mc_encode_cmd_header(DPMAC_CMDID_SET_PROTOCOL,
+					  cmd_flags, token);
+	cmd_params = (struct dpmac_cmd_set_protocol *)cmd.params;
+	cmd_params->eth_if = protocol;
+
+	return mc_send_command(mc_io, &cmd);
+}

drivers/net/ethernet/freescale/dpaa2/dpmac.h

@@ -207,4 +207,7 @@ int dpmac_get_counter(struct fsl_mc_io *mc_io, u32 cmd_flags, u16 token,
 
 int dpmac_get_api_version(struct fsl_mc_io *mc_io, u32 cmd_flags,
 			  u16 *major_ver, u16 *minor_ver);
+
+int dpmac_set_protocol(struct fsl_mc_io *mc_io, u32 cmd_flags, u16 token,
+		       enum dpmac_eth_if protocol);
 #endif /* __FSL_DPMAC_H */