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Commit ec01aeb1 authored by Moshe Shemesh's avatar Moshe Shemesh Committed by David S. Miller
Browse files

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: default avatarMoshe Shemesh <moshe@mellanox.com>
Signed-off-by: default avatarJiri Pirko <jiri@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent e3b7ca18

include/net/devlink.h

+18 −0
Original line number Diff line number Diff line
@@ -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_ */

net/core/devlink.c

+77 −0
Original line number Diff line number Diff line
@@ -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);