[PATCH net-next 4/8] mlxsw: reg: Extend MCION register with new slot number field

[Ido Schimmel <idosch@nvidia.com>]

From: Vadim Pasternak <vadimp@nvidia.com>

Extend MCION (Management Cable IO and Notifications Register) with new
field specifying the slot number. The purpose of this field is to
support access to MCION register for query cage transceiver on modular
system.

For non-modular systems the 'module' number uniquely identifies the
transceiver location. For modular systems the transceivers are
identified by two indexes:
- 'slot_index', specifying the slot number, where line card is located;
- 'module', specifying cage transceiver within the line card.

Signed-off-by: Vadim Pasternak <vadimp@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
---
 drivers/net/ethernet/mellanox/mlxsw/core_env.c | 2 +-
 drivers/net/ethernet/mellanox/mlxsw/reg.h      | 9 ++++++++-
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/core_env.c b/drivers/net/ethernet/mellanox/mlxsw/core_env.c
index eff9ced260ea..602f0738deab 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/core_env.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/core_env.c
@@ -520,7 +520,7 @@ mlxsw_env_get_module_power_mode(struct mlxsw_core *mlxsw_core, u8 module,
 
 	params->policy = mlxsw_env->module_info[module].power_mode_policy;
 
-	mlxsw_reg_mcion_pack(mcion_pl, module);
+	mlxsw_reg_mcion_pack(mcion_pl, 0, module);
 	err = mlxsw_reg_query(mlxsw_core, MLXSW_REG(mcion), mcion_pl);
 	if (err) {
 		NL_SET_ERR_MSG_MOD(extack, "Failed to retrieve module's power mode");
diff --git a/drivers/net/ethernet/mellanox/mlxsw/reg.h b/drivers/net/ethernet/mellanox/mlxsw/reg.h
index 57eb6980bf8c..3695f8c7d143 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/reg.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/reg.h
@@ -10521,6 +10521,12 @@ MLXSW_REG_DEFINE(mcion, MLXSW_REG_MCION_ID, MLXSW_REG_MCION_LEN);
  */
 MLXSW_ITEM32(reg, mcion, module, 0x00, 16, 8);
 
+/* reg_mcion_slot_index
+ * Slot index.
+ * Access: Index
+ */
+MLXSW_ITEM32(reg, mcion, slot_index, 0x00, 12, 4);
+
 enum {
 	MLXSW_REG_MCION_MODULE_STATUS_BITS_PRESENT_MASK = BIT(0),
 	MLXSW_REG_MCION_MODULE_STATUS_BITS_LOW_POWER_MASK = BIT(8),
@@ -10532,9 +10538,10 @@ enum {
  */
 MLXSW_ITEM32(reg, mcion, module_status_bits, 0x04, 0, 16);
 
-static inline void mlxsw_reg_mcion_pack(char *payload, u8 module)
+static inline void mlxsw_reg_mcion_pack(char *payload, u8 slot_index, u8 module)
 {
 	MLXSW_REG_ZERO(mcion, payload);
+	mlxsw_reg_mcion_slot_index_set(payload, slot_index);
 	mlxsw_reg_mcion_module_set(payload, module);
 }
 
-- 
2.33.1