mlxsw: reg: Extend MCION register with new slot number field

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>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/ethernet/mellanox/mlxsw/core_env.c b/drivers/net/ethernet/mellanox/mlxsw/core_env.c
index eff9ced..602f073 100644 (file)
--- 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 57eb698..3695f8c 100644 (file)
--- 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);
 }