mlxsw: spectrum: Use PMTDB register to obtain split info

Newly introduced PMTDB register is there to provide all needed info
about particular requested port split configuration. Use it instead of
figuring the info out manually in the driver.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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

@@ -2944,44 +2944,6 @@ bool mlxsw_core_is_initialized(const struct mlxsw_core *mlxsw_core)
 	return mlxsw_core->is_initialized;
 }
 
-int mlxsw_core_module_max_width(struct mlxsw_core *mlxsw_core, u8 module)
-{
-	enum mlxsw_reg_pmtm_module_type module_type;
-	char pmtm_pl[MLXSW_REG_PMTM_LEN];
-	int err;
-
-	mlxsw_reg_pmtm_pack(pmtm_pl, module);
-	err = mlxsw_reg_query(mlxsw_core, MLXSW_REG(pmtm), pmtm_pl);
-	if (err)
-		return err;
-	mlxsw_reg_pmtm_unpack(pmtm_pl, &module_type);
-
-	/* Here we need to get the module width according to the module type. */
-
-	switch (module_type) {
-	case MLXSW_REG_PMTM_MODULE_TYPE_C2C8X:
-	case MLXSW_REG_PMTM_MODULE_TYPE_QSFP_DD:
-	case MLXSW_REG_PMTM_MODULE_TYPE_OSFP:
-		return 8;
-	case MLXSW_REG_PMTM_MODULE_TYPE_C2C4X:
-	case MLXSW_REG_PMTM_MODULE_TYPE_BP_4X:
-	case MLXSW_REG_PMTM_MODULE_TYPE_QSFP:
-		return 4;
-	case MLXSW_REG_PMTM_MODULE_TYPE_C2C2X:
-	case MLXSW_REG_PMTM_MODULE_TYPE_BP_2X:
-	case MLXSW_REG_PMTM_MODULE_TYPE_SFP_DD:
-	case MLXSW_REG_PMTM_MODULE_TYPE_DSFP:
-		return 2;
-	case MLXSW_REG_PMTM_MODULE_TYPE_C2C1X:
-	case MLXSW_REG_PMTM_MODULE_TYPE_BP_1X:
-	case MLXSW_REG_PMTM_MODULE_TYPE_SFP:
-		return 1;
-	default:
-		return -EINVAL;
-	}
-}
-EXPORT_SYMBOL(mlxsw_core_module_max_width);
-
 static void mlxsw_core_buf_dump_dbg(struct mlxsw_core *mlxsw_core,
 				    const char *buf, size_t size)
 {

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

@@ -250,7 +250,6 @@ mlxsw_core_port_devlink_port_get(struct mlxsw_core *mlxsw_core,
 bool mlxsw_core_port_is_xm(const struct mlxsw_core *mlxsw_core, u8 local_port);
 struct mlxsw_env *mlxsw_core_env(const struct mlxsw_core *mlxsw_core);
 bool mlxsw_core_is_initialized(const struct mlxsw_core *mlxsw_core);
-int mlxsw_core_module_max_width(struct mlxsw_core *mlxsw_core, u8 module);
 
 int mlxsw_core_schedule_dw(struct delayed_work *dwork, unsigned long delay);
 bool mlxsw_core_schedule_work(struct work_struct *work);

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

@@ -25,9 +25,6 @@ enum mlxsw_res_id {
 	MLXSW_RES_ID_MAX_SYSTEM_PORT,
 	MLXSW_RES_ID_MAX_LAG,
 	MLXSW_RES_ID_MAX_LAG_MEMBERS,
-	MLXSW_RES_ID_LOCAL_PORTS_IN_1X,
-	MLXSW_RES_ID_LOCAL_PORTS_IN_2X,
-	MLXSW_RES_ID_LOCAL_PORTS_IN_4X,
 	MLXSW_RES_ID_GUARANTEED_SHARED_BUFFER,
 	MLXSW_RES_ID_CELL_SIZE,
 	MLXSW_RES_ID_MAX_HEADROOM_SIZE,
@@ -84,9 +81,6 @@ static u16 mlxsw_res_ids[] = {
 	[MLXSW_RES_ID_MAX_SYSTEM_PORT] = 0x2502,
 	[MLXSW_RES_ID_MAX_LAG] = 0x2520,
 	[MLXSW_RES_ID_MAX_LAG_MEMBERS] = 0x2521,
-	[MLXSW_RES_ID_LOCAL_PORTS_IN_1X] = 0x2610,
-	[MLXSW_RES_ID_LOCAL_PORTS_IN_2X] = 0x2611,
-	[MLXSW_RES_ID_LOCAL_PORTS_IN_4X] = 0x2612,
 	[MLXSW_RES_ID_GUARANTEED_SHARED_BUFFER] = 0x2805,	/* Bytes */
 	[MLXSW_RES_ID_CELL_SIZE] = 0x2803,	/* Bytes */
 	[MLXSW_RES_ID_MAX_HEADROOM_SIZE] = 0x2811,	/* Bytes */

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

@@ -144,7 +144,8 @@ struct mlxsw_sp_mall_entry;
 
 struct mlxsw_sp_port_mapping {
 	u8 module;
-	u8 width;
+	u8 width; /* Number of lanes used by the port */
+	u8 module_width; /* Number of lanes in the module (static) */
 	u8 lane;
 };
 
@@ -345,7 +346,6 @@ struct mlxsw_sp_port {
 		u16 egr_types;
 		struct mlxsw_sp_ptp_port_stats stats;
 	} ptp;
-	u8 split_base_local_port;
 	int max_mtu;
 	u32 max_speed;
 	struct mlxsw_sp_hdroom *hdroom;