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devlink: Add support for get/set driverinit value 

"driverinit" configuration mode value is held by devlink to enable
the driver query the value after reload. Two additional functions
added to help the driver get/set the value from/to devlink:
devlink_param_driverinit_value_set() and
devlink_param_driverinit_value_get().

Signed-off-by: Moshe Shemesh <moshe@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
hifive-unleashed-5.1
Moshe Shemesh 2018-07-04 14:30:31 +03:00 committed by David S. Miller
parent e3b7ca18ad
commit ec01aeb180
2 changed files with 95 additions and 0 deletions
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18
include/net/devlink.h
View File

@ -503,6 +503,10 @@ int devlink_params_register(struct devlink *devlink,
void devlink_params_unregister(struct devlink *devlink,
const struct devlink_param *params,
size_t params_count);
int devlink_param_driverinit_value_get(struct devlink *devlink, u32 param_id,
union devlink_param_value *init_val);
int devlink_param_driverinit_value_set(struct devlink *devlink, u32 param_id,
union devlink_param_value init_val);
#else
@ -711,6 +715,20 @@ devlink_params_unregister(struct devlink *devlink,
}
static inline int
devlink_param_driverinit_value_get(struct devlink *devlink, u32 param_id,
union devlink_param_value *init_val)
{
return -EOPNOTSUPP;
}
static inline int
devlink_param_driverinit_value_set(struct devlink *devlink, u32 param_id,
union devlink_param_value init_val)
{
return -EOPNOTSUPP;
}
#endif
#endif /* _NET_DEVLINK_H_ */

77
net/core/devlink.c
View File

@ -2645,6 +2645,17 @@ devlink_param_find_by_name(struct list_head *param_list,
return NULL;
}
static struct devlink_param_item *
devlink_param_find_by_id(struct list_head *param_list, u32 param_id)
{
struct devlink_param_item *param_item;
list_for_each_entry(param_item, param_list, list)
if (param_item->param->id == param_id)
return param_item;
return NULL;
}
static bool
devlink_param_cmode_is_supported(const struct devlink_param *param,
enum devlink_param_cmode cmode)
@ -3966,6 +3977,72 @@ void devlink_params_unregister(struct devlink *devlink,
}
EXPORT_SYMBOL_GPL(devlink_params_unregister);
/**
* devlink_param_driverinit_value_get - get configuration parameter
* value for driver initializing
*
* @devlink: devlink
* @param_id: parameter ID
* @init_val: value of parameter in driverinit configuration mode
*
* This function should be used by the driver to get driverinit
* configuration for initialization after reload command.
*/
int devlink_param_driverinit_value_get(struct devlink *devlink, u32 param_id,
union devlink_param_value *init_val)
{
struct devlink_param_item *param_item;
if (!devlink->ops || !devlink->ops->reload)
return -EOPNOTSUPP;
param_item = devlink_param_find_by_id(&devlink->param_list, param_id);
if (!param_item)
return -EINVAL;
if (!param_item->driverinit_value_valid ||
!devlink_param_cmode_is_supported(param_item->param,
DEVLINK_PARAM_CMODE_DRIVERINIT))
return -EOPNOTSUPP;
*init_val = param_item->driverinit_value;
return 0;
}
EXPORT_SYMBOL_GPL(devlink_param_driverinit_value_get);
/**
* devlink_param_driverinit_value_set - set value of configuration
* parameter for driverinit
* configuration mode
*
* @devlink: devlink
* @param_id: parameter ID
* @init_val: value of parameter to set for driverinit configuration mode
*
* This function should be used by the driver to set driverinit
* configuration mode default value.
*/
int devlink_param_driverinit_value_set(struct devlink *devlink, u32 param_id,
union devlink_param_value init_val)
{
struct devlink_param_item *param_item;
param_item = devlink_param_find_by_id(&devlink->param_list, param_id);
if (!param_item)
return -EINVAL;
if (!devlink_param_cmode_is_supported(param_item->param,
DEVLINK_PARAM_CMODE_DRIVERINIT))
return -EOPNOTSUPP;
param_item->driverinit_value = init_val;
param_item->driverinit_value_valid = true;
return 0;
}
EXPORT_SYMBOL_GPL(devlink_param_driverinit_value_set);
static int __init devlink_module_init(void)
{
return genl_register_family(&devlink_nl_family);