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mlxsw: spectrum_ethtool: Add link extended state
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Implement .get_down_ext_state() as part of ethtool_ops.
Query link down reason from PDDR register and convert it to ethtool
link_ext_state.

In case that more information than common link_ext_state is provided,
fill link_ext_substate also with the appropriate value.

Signed-off-by: Amit Cohen <amitc@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Amit Cohen authored and David S. Miller committed Jun 30, 2020
1 parent 1bd0693 commit 60f30cd
Showing 1 changed file with 145 additions and 0 deletions.
145 changes: 145 additions & 0 deletions drivers/net/ethernet/mellanox/mlxsw/spectrum_ethtool.c
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Original file line number Diff line number Diff line change
Expand Up @@ -26,6 +26,150 @@ static void mlxsw_sp_port_get_drvinfo(struct net_device *dev,
sizeof(drvinfo->bus_info));
}

struct mlxsw_sp_ethtool_link_ext_state_opcode_mapping {
u32 status_opcode;
enum ethtool_link_ext_state link_ext_state;
u8 link_ext_substate;
};

static const struct mlxsw_sp_ethtool_link_ext_state_opcode_mapping
mlxsw_sp_link_ext_state_opcode_map[] = {
{2, ETHTOOL_LINK_EXT_STATE_AUTONEG,
ETHTOOL_LINK_EXT_SUBSTATE_AN_NO_PARTNER_DETECTED},
{3, ETHTOOL_LINK_EXT_STATE_AUTONEG,
ETHTOOL_LINK_EXT_SUBSTATE_AN_ACK_NOT_RECEIVED},
{4, ETHTOOL_LINK_EXT_STATE_AUTONEG,
ETHTOOL_LINK_EXT_SUBSTATE_AN_NEXT_PAGE_EXCHANGE_FAILED},
{36, ETHTOOL_LINK_EXT_STATE_AUTONEG,
ETHTOOL_LINK_EXT_SUBSTATE_AN_NO_PARTNER_DETECTED_FORCE_MODE},
{38, ETHTOOL_LINK_EXT_STATE_AUTONEG,
ETHTOOL_LINK_EXT_SUBSTATE_AN_FEC_MISMATCH_DURING_OVERRIDE},
{39, ETHTOOL_LINK_EXT_STATE_AUTONEG,
ETHTOOL_LINK_EXT_SUBSTATE_AN_NO_HCD},

{5, ETHTOOL_LINK_EXT_STATE_LINK_TRAINING_FAILURE,
ETHTOOL_LINK_EXT_SUBSTATE_LT_KR_FRAME_LOCK_NOT_ACQUIRED},
{6, ETHTOOL_LINK_EXT_STATE_LINK_TRAINING_FAILURE,
ETHTOOL_LINK_EXT_SUBSTATE_LT_KR_LINK_INHIBIT_TIMEOUT},
{7, ETHTOOL_LINK_EXT_STATE_LINK_TRAINING_FAILURE,
ETHTOOL_LINK_EXT_SUBSTATE_LT_KR_LINK_PARTNER_DID_NOT_SET_RECEIVER_READY},
{8, ETHTOOL_LINK_EXT_STATE_LINK_TRAINING_FAILURE, 0},
{14, ETHTOOL_LINK_EXT_STATE_LINK_TRAINING_FAILURE,
ETHTOOL_LINK_EXT_SUBSTATE_LT_REMOTE_FAULT},

{9, ETHTOOL_LINK_EXT_STATE_LINK_LOGICAL_MISMATCH,
ETHTOOL_LINK_EXT_SUBSTATE_LLM_PCS_DID_NOT_ACQUIRE_BLOCK_LOCK},
{10, ETHTOOL_LINK_EXT_STATE_LINK_LOGICAL_MISMATCH,
ETHTOOL_LINK_EXT_SUBSTATE_LLM_PCS_DID_NOT_ACQUIRE_AM_LOCK},
{11, ETHTOOL_LINK_EXT_STATE_LINK_LOGICAL_MISMATCH,
ETHTOOL_LINK_EXT_SUBSTATE_LLM_PCS_DID_NOT_GET_ALIGN_STATUS},
{12, ETHTOOL_LINK_EXT_STATE_LINK_LOGICAL_MISMATCH,
ETHTOOL_LINK_EXT_SUBSTATE_LLM_FC_FEC_IS_NOT_LOCKED},
{13, ETHTOOL_LINK_EXT_STATE_LINK_LOGICAL_MISMATCH,
ETHTOOL_LINK_EXT_SUBSTATE_LLM_RS_FEC_IS_NOT_LOCKED},

{15, ETHTOOL_LINK_EXT_STATE_BAD_SIGNAL_INTEGRITY, 0},
{17, ETHTOOL_LINK_EXT_STATE_BAD_SIGNAL_INTEGRITY,
ETHTOOL_LINK_EXT_SUBSTATE_BSI_LARGE_NUMBER_OF_PHYSICAL_ERRORS},
{42, ETHTOOL_LINK_EXT_STATE_BAD_SIGNAL_INTEGRITY,
ETHTOOL_LINK_EXT_SUBSTATE_BSI_UNSUPPORTED_RATE},

{1024, ETHTOOL_LINK_EXT_STATE_NO_CABLE, 0},

{16, ETHTOOL_LINK_EXT_STATE_CABLE_ISSUE,
ETHTOOL_LINK_EXT_SUBSTATE_CI_UNSUPPORTED_CABLE},
{20, ETHTOOL_LINK_EXT_STATE_CABLE_ISSUE,
ETHTOOL_LINK_EXT_SUBSTATE_CI_UNSUPPORTED_CABLE},
{29, ETHTOOL_LINK_EXT_STATE_CABLE_ISSUE,
ETHTOOL_LINK_EXT_SUBSTATE_CI_UNSUPPORTED_CABLE},
{1025, ETHTOOL_LINK_EXT_STATE_CABLE_ISSUE,
ETHTOOL_LINK_EXT_SUBSTATE_CI_UNSUPPORTED_CABLE},
{1029, ETHTOOL_LINK_EXT_STATE_CABLE_ISSUE,
ETHTOOL_LINK_EXT_SUBSTATE_CI_UNSUPPORTED_CABLE},
{1031, ETHTOOL_LINK_EXT_STATE_CABLE_ISSUE, 0},

{1027, ETHTOOL_LINK_EXT_STATE_EEPROM_ISSUE, 0},

{23, ETHTOOL_LINK_EXT_STATE_CALIBRATION_FAILURE, 0},

{1032, ETHTOOL_LINK_EXT_STATE_POWER_BUDGET_EXCEEDED, 0},

{1030, ETHTOOL_LINK_EXT_STATE_OVERHEAT, 0},
};

static void
mlxsw_sp_port_set_link_ext_state(struct mlxsw_sp_ethtool_link_ext_state_opcode_mapping
link_ext_state_mapping,
struct ethtool_link_ext_state_info *link_ext_state_info)
{
switch (link_ext_state_mapping.link_ext_state) {
case ETHTOOL_LINK_EXT_STATE_AUTONEG:
link_ext_state_info->autoneg =
link_ext_state_mapping.link_ext_substate;
break;
case ETHTOOL_LINK_EXT_STATE_LINK_TRAINING_FAILURE:
link_ext_state_info->link_training =
link_ext_state_mapping.link_ext_substate;
break;
case ETHTOOL_LINK_EXT_STATE_LINK_LOGICAL_MISMATCH:
link_ext_state_info->link_logical_mismatch =
link_ext_state_mapping.link_ext_substate;
break;
case ETHTOOL_LINK_EXT_STATE_BAD_SIGNAL_INTEGRITY:
link_ext_state_info->bad_signal_integrity =
link_ext_state_mapping.link_ext_substate;
break;
case ETHTOOL_LINK_EXT_STATE_CABLE_ISSUE:
link_ext_state_info->cable_issue =
link_ext_state_mapping.link_ext_substate;
break;
default:
break;
}

link_ext_state_info->link_ext_state = link_ext_state_mapping.link_ext_state;
}

static int
mlxsw_sp_port_get_link_ext_state(struct net_device *dev,
struct ethtool_link_ext_state_info *link_ext_state_info)
{
struct mlxsw_sp_ethtool_link_ext_state_opcode_mapping link_ext_state_mapping;
struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(dev);
char pddr_pl[MLXSW_REG_PDDR_LEN];
int opcode, err, i;
u32 status_opcode;

if (netif_carrier_ok(dev))
return -ENODATA;

mlxsw_reg_pddr_pack(pddr_pl, mlxsw_sp_port->local_port,
MLXSW_REG_PDDR_PAGE_SELECT_TROUBLESHOOTING_INFO);

opcode = MLXSW_REG_PDDR_TRBLSH_GROUP_OPCODE_MONITOR;
mlxsw_reg_pddr_trblsh_group_opcode_set(pddr_pl, opcode);

err = mlxsw_reg_query(mlxsw_sp_port->mlxsw_sp->core, MLXSW_REG(pddr),
pddr_pl);
if (err)
return err;

status_opcode = mlxsw_reg_pddr_trblsh_status_opcode_get(pddr_pl);
if (!status_opcode)
return -ENODATA;

for (i = 0; i < ARRAY_SIZE(mlxsw_sp_link_ext_state_opcode_map); i++) {
link_ext_state_mapping = mlxsw_sp_link_ext_state_opcode_map[i];
if (link_ext_state_mapping.status_opcode == status_opcode) {
mlxsw_sp_port_set_link_ext_state(link_ext_state_mapping,
link_ext_state_info);
return 0;
}
}

return -ENODATA;
}

static void mlxsw_sp_port_get_pauseparam(struct net_device *dev,
struct ethtool_pauseparam *pause)
{
Expand Down Expand Up @@ -827,6 +971,7 @@ mlxsw_sp_get_ts_info(struct net_device *netdev, struct ethtool_ts_info *info)
const struct ethtool_ops mlxsw_sp_port_ethtool_ops = {
.get_drvinfo = mlxsw_sp_port_get_drvinfo,
.get_link = ethtool_op_get_link,
.get_link_ext_state = mlxsw_sp_port_get_link_ext_state,
.get_pauseparam = mlxsw_sp_port_get_pauseparam,
.set_pauseparam = mlxsw_sp_port_set_pauseparam,
.get_strings = mlxsw_sp_port_get_strings,
Expand Down

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