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mlxsw: core: Add an infrastructure to track transceiver overheat counter

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Initialize an array that stores per-module overheat state and a counter
indicating how many times the module was in overheat state.

Export a function to query the counter according to module number.
Will be used later on by the switch driver (i.e., mlxsw_spectrum) to expose
module's overheat counter as part of ethtool statistics.

Initialize mlxsw_env after driver initialization to be able to query
number of modules from MGPIR register.

Signed-off-by: Amit Cohen <amcohen@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Amit Cohen 2020-09-27 10:50:10 +03:00 committed by David S. Miller
parent fb1292f821
commit 0652ac0775
4 changed files with 96 additions and 0 deletions
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22
drivers/net/ethernet/mellanox/mlxsw/core.c
View file

@ -26,6 +26,7 @@
#include <trace/events/devlink.h>
#include "core.h"
#include "core_env.h"
#include "item.h"
#include "cmd.h"
#include "port.h"
@ -87,6 +88,8 @@ struct mlxsw_core {
struct {
struct devlink_health_reporter *fw_fatal;
} health;
struct mlxsw_env *env;
bool is_initialized; /* Denotes if core was already initialized. */
unsigned long driver_priv[];
/* driver_priv has to be always the last item */
};
@ -1943,6 +1946,11 @@ __mlxsw_core_bus_device_register(const struct mlxsw_bus_info *mlxsw_bus_info,
if (err)
goto err_thermal_init;
err = mlxsw_env_init(mlxsw_core, &mlxsw_core->env);
if (err)
goto err_env_init;
mlxsw_core->is_initialized = true;
devlink_params_publish(devlink);
if (!reload)
@ -1950,6 +1958,8 @@ __mlxsw_core_bus_device_register(const struct mlxsw_bus_info *mlxsw_bus_info,
return 0;
err_env_init:
mlxsw_thermal_fini(mlxsw_core->thermal);
err_thermal_init:
mlxsw_hwmon_fini(mlxsw_core->hwmon);
err_hwmon_init:
@ -2026,6 +2036,8 @@ void mlxsw_core_bus_device_unregister(struct mlxsw_core *mlxsw_core,
}
devlink_params_unpublish(devlink);
mlxsw_core->is_initialized = false;
mlxsw_env_fini(mlxsw_core->env);
mlxsw_thermal_fini(mlxsw_core->thermal);
mlxsw_hwmon_fini(mlxsw_core->hwmon);
if (mlxsw_core->driver->fini)
@ -2829,6 +2841,16 @@ mlxsw_core_port_devlink_port_get(struct mlxsw_core *mlxsw_core,
}
EXPORT_SYMBOL(mlxsw_core_port_devlink_port_get);
struct mlxsw_env *mlxsw_core_env(const struct mlxsw_core *mlxsw_core)
{
return mlxsw_core->env;
}
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;

2
drivers/net/ethernet/mellanox/mlxsw/core.h
View file

@ -221,6 +221,8 @@ enum devlink_port_type mlxsw_core_port_type_get(struct mlxsw_core *mlxsw_core,
struct devlink_port *
mlxsw_core_port_devlink_port_get(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);

66
drivers/net/ethernet/mellanox/mlxsw/core_env.c
View file

@ -10,6 +10,18 @@
#include "item.h"
#include "reg.h"
struct mlxsw_env_module_info {
u64 module_overheat_counter;
bool is_overheat;
};
struct mlxsw_env {
struct mlxsw_core *core;
u8 module_count;
spinlock_t module_info_lock; /* Protects 'module_info'. */
struct mlxsw_env_module_info module_info[];
};
static int mlxsw_env_validate_cable_ident(struct mlxsw_core *core, int id,
bool *qsfp, bool *cmis)
{
@ -293,3 +305,57 @@ int mlxsw_env_get_module_eeprom(struct net_device *netdev,
return 0;
}
EXPORT_SYMBOL(mlxsw_env_get_module_eeprom);
int
mlxsw_env_module_overheat_counter_get(struct mlxsw_core *mlxsw_core, u8 module,
u64 *p_counter)
{
struct mlxsw_env *mlxsw_env = mlxsw_core_env(mlxsw_core);
/* Prevent switch driver from accessing uninitialized data. */
if (!mlxsw_core_is_initialized(mlxsw_core)) {
*p_counter = 0;
return 0;
}
if (WARN_ON_ONCE(module >= mlxsw_env->module_count))
return -EINVAL;
spin_lock_bh(&mlxsw_env->module_info_lock);
*p_counter = mlxsw_env->module_info[module].module_overheat_counter;
spin_unlock_bh(&mlxsw_env->module_info_lock);
return 0;
}
EXPORT_SYMBOL(mlxsw_env_module_overheat_counter_get);
int mlxsw_env_init(struct mlxsw_core *mlxsw_core, struct mlxsw_env **p_env)
{
char mgpir_pl[MLXSW_REG_MGPIR_LEN];
struct mlxsw_env *env;
u8 module_count;
int err;
mlxsw_reg_mgpir_pack(mgpir_pl);
err = mlxsw_reg_query(mlxsw_core, MLXSW_REG(mgpir), mgpir_pl);
if (err)
return err;
mlxsw_reg_mgpir_unpack(mgpir_pl, NULL, NULL, NULL, &module_count);
env = kzalloc(struct_size(env, module_info, module_count), GFP_KERNEL);
if (!env)
return -ENOMEM;
spin_lock_init(&env->module_info_lock);
env->core = mlxsw_core;
env->module_count = module_count;
*p_env = env;
return 0;
}
void mlxsw_env_fini(struct mlxsw_env *env)
{
kfree(env);
}

6
drivers/net/ethernet/mellanox/mlxsw/core_env.h
View file

@ -14,4 +14,10 @@ int mlxsw_env_get_module_eeprom(struct net_device *netdev,
struct mlxsw_core *mlxsw_core, int module,
struct ethtool_eeprom *ee, u8 *data);
int
mlxsw_env_module_overheat_counter_get(struct mlxsw_core *mlxsw_core, u8 module,
u64 *p_counter);
int mlxsw_env_init(struct mlxsw_core *core, struct mlxsw_env **p_env);
void mlxsw_env_fini(struct mlxsw_env *env);
#endif