mlxsw: spectrum_buffers: Forbid configuration of multicast pool

Commit e83c045e ("mlxsw: spectrum_buffers: Configure MC pool") added
a dedicated pool for multicast traffic. The pool is visible to the user
so that it would be possible to monitor its occupancy, but its
configuration should be forbidden in order to maintain its intended
operation.
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Petr Machata <petrm@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlxsw/spectrum_buffers.c

@@ -400,6 +400,14 @@ static void mlxsw_sp_sb_ports_fini(struct mlxsw_sp *mlxsw_sp)
 		.size = _size,		\
 	}
 
+#define MLXSW_SP_SB_PR_EXT(_mode, _size, _freeze_mode, _freeze_size)	\
+	{								\
+		.mode = _mode,						\
+		.size = _size,						\
+		.freeze_mode = _freeze_mode,				\
+		.freeze_size = _freeze_size,				\
+	}
+
 #define MLXSW_SP1_SB_PR_INGRESS_SIZE	12440000
 #define MLXSW_SP1_SB_PR_INGRESS_MNG_SIZE (200 * 1000)
 #define MLXSW_SP1_SB_PR_EGRESS_SIZE	13232000
@@ -418,7 +426,8 @@ static const struct mlxsw_sp_sb_pr mlxsw_sp1_sb_prs[] = {
 	MLXSW_SP_SB_PR(MLXSW_REG_SBPR_MODE_DYNAMIC, 0),
 	MLXSW_SP_SB_PR(MLXSW_REG_SBPR_MODE_DYNAMIC, 0),
 	MLXSW_SP_SB_PR(MLXSW_REG_SBPR_MODE_DYNAMIC, 0),
-	MLXSW_SP_SB_PR(MLXSW_REG_SBPR_MODE_STATIC, MLXSW_SP_SB_INFI),
+	MLXSW_SP_SB_PR_EXT(MLXSW_REG_SBPR_MODE_STATIC, MLXSW_SP_SB_INFI,
+			   true, true),
 };
 
 #define MLXSW_SP2_SB_PR_INGRESS_SIZE	40960000
@@ -439,7 +448,8 @@ static const struct mlxsw_sp_sb_pr mlxsw_sp2_sb_prs[] = {
 	MLXSW_SP_SB_PR(MLXSW_REG_SBPR_MODE_STATIC, 0),
 	MLXSW_SP_SB_PR(MLXSW_REG_SBPR_MODE_STATIC, 0),
 	MLXSW_SP_SB_PR(MLXSW_REG_SBPR_MODE_STATIC, 0),
-	MLXSW_SP_SB_PR(MLXSW_REG_SBPR_MODE_STATIC, MLXSW_SP_SB_INFI),
+	MLXSW_SP_SB_PR_EXT(MLXSW_REG_SBPR_MODE_STATIC, MLXSW_SP_SB_INFI,
+			   true, true),
 };
 
 static int mlxsw_sp_sb_prs_init(struct mlxsw_sp *mlxsw_sp,