dpaa2-mac: add the MC API for retrieving the version

The dpmac_get_api_version command will be used in the next patches to
determine if the current firmware is capable or not to change the
Ethernet protocol running on the MAC.
Signed-off-by: NIoana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

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

@@ -19,6 +19,8 @@
 #define DPMAC_CMDID_CLOSE		DPMAC_CMD(0x800)
 #define DPMAC_CMDID_OPEN		DPMAC_CMD(0x80c)
 
+#define DPMAC_CMDID_GET_API_VERSION	DPMAC_CMD(0xa0c)
+
 #define DPMAC_CMDID_GET_ATTR		DPMAC_CMD(0x004)
 #define DPMAC_CMDID_SET_LINK_STATE	DPMAC_CMD_V2(0x0c3)
 
@@ -70,4 +72,9 @@ struct dpmac_rsp_get_counter {
 	__le64 counter;
 };
 
+struct dpmac_rsp_get_api_version {
+	__le16 major;
+	__le16 minor;
+};
+
 #endif /* _FSL_DPMAC_CMD_H */

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

@@ -181,3 +181,34 @@ int dpmac_get_counter(struct fsl_mc_io *mc_io, u32 cmd_flags, u16 token,
 
 	return 0;
 }
+
+/**
+ * dpmac_get_api_version() - Get Data Path MAC version
+ * @mc_io:	Pointer to MC portal's I/O object
+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
+ * @major_ver:	Major version of data path mac API
+ * @minor_ver:	Minor version of data path mac API
+ *
+ * Return:  '0' on Success; Error code otherwise.
+ */
+int dpmac_get_api_version(struct fsl_mc_io *mc_io, u32 cmd_flags,
+			  u16 *major_ver, u16 *minor_ver)
+{
+	struct dpmac_rsp_get_api_version *rsp_params;
+	struct fsl_mc_command cmd = { 0 };
+	int err;
+
+	cmd.header = mc_encode_cmd_header(DPMAC_CMDID_GET_API_VERSION,
+					  cmd_flags,
+					  0);
+
+	err = mc_send_command(mc_io, &cmd);
+	if (err)
+		return err;
+
+	rsp_params = (struct dpmac_rsp_get_api_version *)cmd.params;
+	*major_ver = le16_to_cpu(rsp_params->major);
+	*minor_ver = le16_to_cpu(rsp_params->minor);
+
+	return 0;
+}

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

@@ -205,4 +205,6 @@ enum dpmac_counter_id {
 int dpmac_get_counter(struct fsl_mc_io *mc_io, u32 cmd_flags, u16 token,
 		      enum dpmac_counter_id id, u64 *value);
 
+int dpmac_get_api_version(struct fsl_mc_io *mc_io, u32 cmd_flags,
+			  u16 *major_ver, u16 *minor_ver);
 #endif /* __FSL_DPMAC_H */