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Date: Sun, 27 Sep 2020 10:50:10 +0300
From: Ido Schimmel <idosch@...sch.org>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net, kuba@...nel.org, amcohen@...dia.com,
jiri@...dia.com, mlxsw@...dia.com, Ido Schimmel <idosch@...dia.com>
Subject: [PATCH net-next 05/10] mlxsw: core: Add an infrastructure to track transceiver overheat counter
From: Amit Cohen <amcohen@...dia.com>
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@...dia.com>
Signed-off-by: Ido Schimmel <idosch@...dia.com>
---
drivers/net/ethernet/mellanox/mlxsw/core.c | 22 +++++++
drivers/net/ethernet/mellanox/mlxsw/core.h | 2 +
.../net/ethernet/mellanox/mlxsw/core_env.c | 66 +++++++++++++++++++
.../net/ethernet/mellanox/mlxsw/core_env.h | 6 ++
4 files changed, 96 insertions(+)
diff --git a/drivers/net/ethernet/mellanox/mlxsw/core.c b/drivers/net/ethernet/mellanox/mlxsw/core.c
index f8dddcf461f5..916c641b02e2 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/core.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/core.c
@@ -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;
diff --git a/drivers/net/ethernet/mellanox/mlxsw/core.h b/drivers/net/ethernet/mellanox/mlxsw/core.h
index 2ca085a44774..3948ad865aba 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/core.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/core.h
@@ -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);
diff --git a/drivers/net/ethernet/mellanox/mlxsw/core_env.c b/drivers/net/ethernet/mellanox/mlxsw/core_env.c
index 056eeb85be60..35ea4d519046 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/core_env.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/core_env.c
@@ -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);
+}
diff --git a/drivers/net/ethernet/mellanox/mlxsw/core_env.h b/drivers/net/ethernet/mellanox/mlxsw/core_env.h
index 064d0e770c01..8e36a2634ef5 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/core_env.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/core_env.h
@@ -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
--
2.26.2
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