diff options
author | Vadim Pasternak <vadimp@mellanox.com> | 2019-02-13 14:28:47 +0300 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2019-02-14 09:33:02 +0300 |
commit | d93c19a1d95c90b6ded1dc3c8ccfe0e46e220af8 (patch) | |
tree | f0c1657201407feb7044f9745dd4e6a731e21ed7 /drivers | |
parent | 3760c2b99e20ee16cd328aca890ac0aca3c72ac5 (diff) | |
download | linux-d93c19a1d95c90b6ded1dc3c8ccfe0e46e220af8.tar.xz |
mlxsw: core: Add API for QSFP module temperature thresholds reading
Add new API to read QSFP module's temperature thresholds - warning and
critical.
New internal API reads the temperature thresholds from the modules,
which are equipped with the thermal sensor. These thresholds will be
exposed via hwmon subsystem.
Signed-off-by: Vadim Pasternak <vadimp@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>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/net/ethernet/mellanox/mlxsw/Makefile | 2 | ||||
-rw-r--r-- | drivers/net/ethernet/mellanox/mlxsw/core_env.c | 117 | ||||
-rw-r--r-- | drivers/net/ethernet/mellanox/mlxsw/core_env.h | 10 |
3 files changed, 128 insertions, 1 deletions
diff --git a/drivers/net/ethernet/mellanox/mlxsw/Makefile b/drivers/net/ethernet/mellanox/mlxsw/Makefile index bbf45f10c208..a01d15546e37 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/Makefile +++ b/drivers/net/ethernet/mellanox/mlxsw/Makefile @@ -1,7 +1,7 @@ # SPDX-License-Identifier: GPL-2.0 obj-$(CONFIG_MLXSW_CORE) += mlxsw_core.o mlxsw_core-objs := core.o core_acl_flex_keys.o \ - core_acl_flex_actions.o + core_acl_flex_actions.o core_env.o mlxsw_core-$(CONFIG_MLXSW_CORE_HWMON) += core_hwmon.o mlxsw_core-$(CONFIG_MLXSW_CORE_THERMAL) += core_thermal.o obj-$(CONFIG_MLXSW_PCI) += mlxsw_pci.o diff --git a/drivers/net/ethernet/mellanox/mlxsw/core_env.c b/drivers/net/ethernet/mellanox/mlxsw/core_env.c new file mode 100644 index 000000000000..160d6cd164f4 --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlxsw/core_env.c @@ -0,0 +1,117 @@ +// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 +/* Copyright (c) 2018 Mellanox Technologies. All rights reserved */ + +#include <linux/kernel.h> +#include <linux/err.h> + +#include "core.h" +#include "core_env.h" +#include "item.h" +#include "reg.h" + +static int mlxsw_env_validate_cable_ident(struct mlxsw_core *core, int id, + bool *qsfp) +{ + char eeprom_tmp[MLXSW_REG_MCIA_EEPROM_SIZE]; + char mcia_pl[MLXSW_REG_MCIA_LEN]; + u8 ident; + int err; + + mlxsw_reg_mcia_pack(mcia_pl, id, 0, MLXSW_REG_MCIA_PAGE0_LO_OFF, 0, 1, + MLXSW_REG_MCIA_I2C_ADDR_LOW); + err = mlxsw_reg_query(core, MLXSW_REG(mcia), mcia_pl); + if (err) + return err; + mlxsw_reg_mcia_eeprom_memcpy_from(mcia_pl, eeprom_tmp); + ident = eeprom_tmp[0]; + switch (ident) { + case MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID_SFP: + *qsfp = false; + break; + case MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID_QSFP: /* fall-through */ + case MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID_QSFP_PLUS: /* fall-through */ + case MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID_QSFP28: /* fall-through */ + case MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID_QSFP_DD: + *qsfp = true; + break; + default: + return -EINVAL; + } + + return 0; +} + +int mlxsw_env_module_temp_thresholds_get(struct mlxsw_core *core, int module, + int off, int *temp) +{ + char eeprom_tmp[MLXSW_REG_MCIA_EEPROM_SIZE]; + union { + u8 buf[MLXSW_REG_MCIA_TH_ITEM_SIZE]; + u16 temp; + } temp_thresh; + char mcia_pl[MLXSW_REG_MCIA_LEN] = {0}; + char mtbr_pl[MLXSW_REG_MTBR_LEN] = {0}; + u16 module_temp; + bool qsfp; + int err; + + mlxsw_reg_mtbr_pack(mtbr_pl, MLXSW_REG_MTBR_BASE_MODULE_INDEX + module, + 1); + err = mlxsw_reg_query(core, MLXSW_REG(mtbr), mtbr_pl); + if (err) + return err; + + /* Don't read temperature thresholds for module with no valid info. */ + mlxsw_reg_mtbr_temp_unpack(mtbr_pl, 0, &module_temp, NULL); + switch (module_temp) { + case MLXSW_REG_MTBR_BAD_SENS_INFO: /* fall-through */ + case MLXSW_REG_MTBR_NO_CONN: /* fall-through */ + case MLXSW_REG_MTBR_NO_TEMP_SENS: /* fall-through */ + case MLXSW_REG_MTBR_INDEX_NA: + *temp = 0; + return 0; + default: + /* Do not consider thresholds for zero temperature. */ + if (!MLXSW_REG_MTMP_TEMP_TO_MC(module_temp)) { + *temp = 0; + return 0; + } + break; + } + + /* Read Free Side Device Temperature Thresholds from page 03h + * (MSB at lower byte address). + * Bytes: + * 128-129 - Temp High Alarm (SFP_TEMP_HIGH_ALARM); + * 130-131 - Temp Low Alarm (SFP_TEMP_LOW_ALARM); + * 132-133 - Temp High Warning (SFP_TEMP_HIGH_WARN); + * 134-135 - Temp Low Warning (SFP_TEMP_LOW_WARN); + */ + + /* Validate module identifier value. */ + err = mlxsw_env_validate_cable_ident(core, module, &qsfp); + if (err) + return err; + + if (qsfp) + mlxsw_reg_mcia_pack(mcia_pl, module, 0, + MLXSW_REG_MCIA_TH_PAGE_NUM, + MLXSW_REG_MCIA_TH_PAGE_OFF + off, + MLXSW_REG_MCIA_TH_ITEM_SIZE, + MLXSW_REG_MCIA_I2C_ADDR_LOW); + else + mlxsw_reg_mcia_pack(mcia_pl, module, 0, + MLXSW_REG_MCIA_PAGE0_LO, + off, MLXSW_REG_MCIA_TH_ITEM_SIZE, + MLXSW_REG_MCIA_I2C_ADDR_HIGH); + + err = mlxsw_reg_query(core, MLXSW_REG(mcia), mcia_pl); + if (err) + return err; + + mlxsw_reg_mcia_eeprom_memcpy_from(mcia_pl, eeprom_tmp); + memcpy(temp_thresh.buf, eeprom_tmp, MLXSW_REG_MCIA_TH_ITEM_SIZE); + *temp = temp_thresh.temp * 1000; + + return 0; +} diff --git a/drivers/net/ethernet/mellanox/mlxsw/core_env.h b/drivers/net/ethernet/mellanox/mlxsw/core_env.h new file mode 100644 index 000000000000..6dbdf63f3ee1 --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlxsw/core_env.h @@ -0,0 +1,10 @@ +/* SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 */ +/* Copyright (c) 2018 Mellanox Technologies. All rights reserved */ + +#ifndef _MLXSW_CORE_ENV_H +#define _MLXSW_CORE_ENV_H + +int mlxsw_env_module_temp_thresholds_get(struct mlxsw_core *core, int module, + int off, int *temp); + +#endif |