mlxsw: reg: Add Shared Buffer Internal Buffer register

The SBIB register configures per port buffer for internal use. This
register is used to configure an egress mirror buffer on the egress port
which does the mirroring.
Signed-off-by: Yotam Gigi <yotamg@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlxsw/reg.h

@@ -5062,6 +5062,45 @@ static inline void mlxsw_reg_sbsr_rec_unpack(char *payload, int rec_index,
 		mlxsw_reg_sbsr_rec_max_buff_occupancy_get(payload, rec_index);
 }
 
+/* SBIB - Shared Buffer Internal Buffer Register
+ * ---------------------------------------------
+ * The SBIB register configures per port buffers for internal use. The internal
+ * buffers consume memory on the port buffers (note that the port buffers are
+ * used also by PBMC).
+ *
+ * For Spectrum this is used for egress mirroring.
+ */
+#define MLXSW_REG_SBIB_ID 0xB006
+#define MLXSW_REG_SBIB_LEN 0x10
+
+static const struct mlxsw_reg_info mlxsw_reg_sbib = {
+	.id = MLXSW_REG_SBIB_ID,
+	.len = MLXSW_REG_SBIB_LEN,
+};
+
+/* reg_sbib_local_port
+ * Local port number
+ * Not supported for CPU port and router port
+ * Access: Index
+ */
+MLXSW_ITEM32(reg, sbib, local_port, 0x00, 16, 8);
+
+/* reg_sbib_buff_size
+ * Units represented in cells
+ * Allowed range is 0 to (cap_max_headroom_size - 1)
+ * Default is 0
+ * Access: RW
+ */
+MLXSW_ITEM32(reg, sbib, buff_size, 0x08, 0, 24);
+
+static inline void mlxsw_reg_sbib_pack(char *payload, u8 local_port,
+				       u32 buff_size)
+{
+	MLXSW_REG_ZERO(sbib, payload);
+	mlxsw_reg_sbib_local_port_set(payload, local_port);
+	mlxsw_reg_sbib_buff_size_set(payload, buff_size);
+}
+
 static inline const char *mlxsw_reg_id_str(u16 reg_id)
 {
 	switch (reg_id) {
@@ -5179,6 +5218,8 @@ static inline const char *mlxsw_reg_id_str(u16 reg_id)
 		return "SBMM";
 	case MLXSW_REG_SBSR_ID:
 		return "SBSR";
+	case MLXSW_REG_SBIB_ID:
+		return "SBIB";
 	default:
 		return "*UNKNOWN*";
 	}