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mlxsw: core_hwmon: Add interfaces for line card initialization and de-initialization

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Add callback functions for line card 'hwmon' initialization and
de-initialization. Each line card is associated with the relevant
'hwmon' device, which may contain thermal attributes for the cages
and gearboxes found on this line card.

The line card 'hwmon' initialization / de-initialization APIs are to be
called when line card is set to active / inactive state by
got_active() / got_inactive() callbacks from line card state machine.

For example cage temperature for module #9 located at line card #7 will
be exposed by utility 'sensors' like:
linecard#07
front panel 009:	+32.0C  (crit = +70.0C, emerg = +80.0C)
And temperature for gearbox #3 located at line card #5 will be exposed
like:
linecard#05
gearbox 003:		+41.0C  (highest = +41.0C)

Signed-off-by: Vadim Pasternak <vadimp@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vadim Pasternak 2022-04-19 17:54:31 +03:00 committed by David S. Miller
parent f11a323da4
commit 99a03b3193
1 changed files with 84 additions and 0 deletions
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84
drivers/net/ethernet/mellanox/mlxsw/core_hwmon.c
View File

@ -19,6 +19,7 @@
#define MLXSW_HWMON_ATTR_PER_SENSOR 3
#define MLXSW_HWMON_ATTR_PER_MODULE 7
#define MLXSW_HWMON_ATTR_PER_GEARBOX 4
#define MLXSW_HWMON_DEV_NAME_LEN_MAX 16
#define MLXSW_HWMON_ATTR_COUNT (MLXSW_HWMON_SENSORS_MAX_COUNT * MLXSW_HWMON_ATTR_PER_SENSOR + \
MLXSW_HWMON_MODULES_MAX_COUNT * MLXSW_HWMON_ATTR_PER_MODULE + \
@ -41,6 +42,7 @@ static int mlxsw_hwmon_get_attr_index(int index, int count)
}
struct mlxsw_hwmon_dev {
char name[MLXSW_HWMON_DEV_NAME_LEN_MAX];
struct mlxsw_hwmon *hwmon;
struct device *hwmon_dev;
struct attribute_group group;
@ -51,6 +53,7 @@ struct mlxsw_hwmon_dev {
u8 sensor_count;
u8 module_sensor_max;
u8 slot_index;
bool active;
};
struct mlxsw_hwmon {
@ -780,6 +783,75 @@ static int mlxsw_hwmon_gearbox_init(struct mlxsw_hwmon_dev *mlxsw_hwmon_dev)
return 0;
}
static void
mlxsw_hwmon_got_active(struct mlxsw_core *mlxsw_core, u8 slot_index,
void *priv)
{
struct mlxsw_hwmon *hwmon = priv;
struct mlxsw_hwmon_dev *linecard;
struct device *dev;
int err;
dev = hwmon->bus_info->dev;
linecard = &hwmon->line_cards[slot_index];
if (linecard->active)
return;
/* For the main board, module sensor indexes start from 1, sensor index
* 0 is used for the ASIC. Use the same numbering for line cards.
*/
linecard->sensor_count = 1;
linecard->slot_index = slot_index;
linecard->hwmon = hwmon;
err = mlxsw_hwmon_module_init(linecard);
if (err) {
dev_err(dev, "Failed to configure hwmon objects for line card modules in slot %d\n",
slot_index);
return;
}
err = mlxsw_hwmon_gearbox_init(linecard);
if (err) {
dev_err(dev, "Failed to configure hwmon objects for line card gearboxes in slot %d\n",
slot_index);
return;
}
linecard->groups[0] = &linecard->group;
linecard->group.attrs = linecard->attrs;
sprintf(linecard->name, "%s#%02u", "linecard", slot_index);
linecard->hwmon_dev =
hwmon_device_register_with_groups(dev, linecard->name,
linecard, linecard->groups);
if (IS_ERR(linecard->hwmon_dev)) {
dev_err(dev, "Failed to register hwmon objects for line card in slot %d\n",
slot_index);
return;
}
linecard->active = true;
}
static void
mlxsw_hwmon_got_inactive(struct mlxsw_core *mlxsw_core, u8 slot_index,
void *priv)
{
struct mlxsw_hwmon *hwmon = priv;
struct mlxsw_hwmon_dev *linecard;
linecard = &hwmon->line_cards[slot_index];
if (!linecard->active)
return;
linecard->active = false;
hwmon_device_unregister(linecard->hwmon_dev);
/* Reset attributes counter */
linecard->attrs_count = 0;
}
static struct mlxsw_linecards_event_ops mlxsw_hwmon_event_ops = {
.got_active = mlxsw_hwmon_got_active,
.got_inactive = mlxsw_hwmon_got_inactive,
};
int mlxsw_hwmon_init(struct mlxsw_core *mlxsw_core,
const struct mlxsw_bus_info *mlxsw_bus_info,
struct mlxsw_hwmon **p_hwmon)
@ -836,10 +908,19 @@ int mlxsw_hwmon_init(struct mlxsw_core *mlxsw_core,
goto err_hwmon_register;
}
err = mlxsw_linecards_event_ops_register(mlxsw_hwmon->core,
&mlxsw_hwmon_event_ops,
mlxsw_hwmon);
if (err)
goto err_linecards_event_ops_register;
mlxsw_hwmon->line_cards[0].hwmon_dev = hwmon_dev;
mlxsw_hwmon->line_cards[0].active = true;
*p_hwmon = mlxsw_hwmon;
return 0;
err_linecards_event_ops_register:
hwmon_device_unregister(mlxsw_hwmon->line_cards[0].hwmon_dev);
err_hwmon_register:
err_temp_gearbox_init:
err_temp_module_init:
@ -851,6 +932,9 @@ int mlxsw_hwmon_init(struct mlxsw_core *mlxsw_core,
void mlxsw_hwmon_fini(struct mlxsw_hwmon *mlxsw_hwmon)
{
mlxsw_hwmon->line_cards[0].active = false;
mlxsw_linecards_event_ops_unregister(mlxsw_hwmon->core,
&mlxsw_hwmon_event_ops, mlxsw_hwmon);
hwmon_device_unregister(mlxsw_hwmon->line_cards[0].hwmon_dev);
kfree(mlxsw_hwmon);
}