@@ -214,6 +214,24 @@ roc_bphy_cgx_lmac_exists(struct roc_bphy_cgx *roc_cgx, unsigned int lmac)
 	       (roc_cgx->lmac_bmap & BIT_ULL(lmac));
 }
 
+static int
+roc_bphy_cgx_intlbk_ena_dis(struct roc_bphy_cgx *roc_cgx, unsigned int lmac,
+			    bool enable)
+{
+	uint64_t scr1, scr0;
+
+	if (!roc_cgx)
+		return -EINVAL;
+
+	if (!roc_bphy_cgx_lmac_exists(roc_cgx, lmac))
+		return -ENODEV;
+
+	scr1 = FIELD_PREP(SCR1_ETH_CMD_ID, ETH_CMD_INTERNAL_LBK) |
+	       FIELD_PREP(SCR1_ETH_CTL_ARGS_ENABLE, enable);
+
+	return roc_bphy_cgx_intf_req(roc_cgx, lmac, scr1, &scr0);
+}
+
 int
 roc_bphy_cgx_get_linkinfo(struct roc_bphy_cgx *roc_cgx, unsigned int lmac,
 			  struct roc_bphy_cgx_link_info *info)

@@ -244,3 +262,15 @@ roc_bphy_cgx_get_linkinfo(struct roc_bphy_cgx *roc_cgx, unsigned int lmac,
 
 	return 0;
 }
+
+int
+roc_bphy_cgx_intlbk_enable(struct roc_bphy_cgx *roc_cgx, unsigned int lmac)
+{
+	return roc_bphy_cgx_intlbk_ena_dis(roc_cgx, lmac, true);
+}
+
+int
+roc_bphy_cgx_intlbk_disable(struct roc_bphy_cgx *roc_cgx, unsigned int lmac)
+{
+	return roc_bphy_cgx_intlbk_ena_dis(roc_cgx, lmac, false);
+}

@@ -90,5 +90,9 @@ __roc_api int roc_bphy_cgx_dev_fini(struct roc_bphy_cgx *roc_cgx);
 __roc_api int roc_bphy_cgx_get_linkinfo(struct roc_bphy_cgx *roc_cgx,
 					unsigned int lmac,
 					struct roc_bphy_cgx_link_info *info);
+__roc_api int roc_bphy_cgx_intlbk_enable(struct roc_bphy_cgx *roc_cgx,
+					 unsigned int lmac);
+__roc_api int roc_bphy_cgx_intlbk_disable(struct roc_bphy_cgx *roc_cgx,
+					  unsigned int lmac);
 
 #endif /* _ROC_BPHY_CGX_H_ */

@@ -8,6 +8,7 @@
 /* REQUEST ID types. Input to firmware */
 enum eth_cmd_id {
 	ETH_CMD_GET_LINK_STS = 4,
+	ETH_CMD_INTERNAL_LBK = 7,
 	ETH_CMD_INTF_SHUTDOWN = 12,
 };
 

@@ -58,6 +59,9 @@ enum eth_cmd_own {
 /* struct eth_cmd */
 #define SCR1_ETH_CMD_ID GENMASK_ULL(7, 2)
 
+/* struct eth_ctl_args */
+#define SCR1_ETH_CTL_ARGS_ENABLE BIT_ULL(8)
+
 #define SCR1_OWN_STATUS GENMASK_ULL(1, 0)
 
 #endif /* _ROC_BPHY_CGX_PRIV_H_ */

@@ -12,6 +12,8 @@ INTERNAL {
 	roc_bphy_cgx_dev_fini;
 	roc_bphy_cgx_dev_init;
 	roc_bphy_cgx_get_linkinfo;
+	roc_bphy_cgx_intlbk_disable;
+	roc_bphy_cgx_intlbk_enable;
 	roc_clk_freq_get;
 	roc_error_msg_get;
 	roc_idev_lmt_base_addr_get;