From: Moshe Shemesh <moshe@mellanox.com>
Date: Wed, 4 Jul 2018 14:30:31 +0300
Subject: devlink: Add support for get/set driverinit value
Patch-mainline: v4.19-rc1
Git-commit: ec01aeb1803eaaf0d006e7b07b5ddb5e429c38a4
References: bsc#1109837
"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>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
include/net/devlink.h | 18 +++++++++++
net/core/devlink.c | 77 ++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 95 insertions(+)
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -503,6 +503,10 @@ int devlink_params_register(struct devli
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
}
+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_ */
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -2649,6 +2649,17 @@ devlink_param_find_by_name(struct list_h
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)
@@ -3970,6 +3981,72 @@ void devlink_params_unregister(struct de
}
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);