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Date: Wed, 5 Dec 2018 11:26:58 +0530
From: Vasundhara Volam <vasundhara-v.volam@...adcom.com>
To: davem@...emloft.net
Cc: michael.chan@...adcom.com, jiri@...lanox.com,
netdev@...r.kernel.org
Subject: [PATCH net-next RFC 5/7] devlink: Add devlink notifications support for port params
Add notification call for devlink port param set, register and unregister
functions.
Add devlink_port_param_value_changed() function to enable the driver notify
devlink on value change. Driver should use this function after value was
changed on any configuration mode part to driverinit.
Cc: Jiri Pirko <jiri@...lanox.com>
Signed-off-by: Vasundhara Volam <vasundhara-v.volam@...adcom.com>
---
include/net/devlink.h | 9 ++++
include/uapi/linux/devlink.h | 2 +
net/core/devlink.c | 97 ++++++++++++++++++++++++++++++++------------
3 files changed, 83 insertions(+), 25 deletions(-)
diff --git a/include/net/devlink.h b/include/net/devlink.h
index c22b195..abb5b3a 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -591,6 +591,8 @@ void devlink_port_params_unregister(struct devlink_port *devlink_port,
int devlink_port_param_driverinit_value_set(struct devlink_port *devlink_port,
u32 param_id,
union devlink_param_value init_val);
+void devlink_port_param_value_changed(struct devlink_port *devlink_port,
+ u32 param_id);
struct devlink_region *devlink_region_create(struct devlink *devlink,
const char *region_name,
u32 region_max_snapshots,
@@ -864,6 +866,13 @@ static inline bool devlink_dpipe_table_counter_enabled(struct devlink *devlink,
return -EOPNOTSUPP;
}
+static inline void
+devlink_port_param_value_changed(struct devlink_port *devlink_port,
+ u32 param_id)
+{
+ return -EOPNOTSUPP;
+}
+
static inline struct devlink_region *
devlink_region_create(struct devlink *devlink,
const char *region_name,
diff --git a/include/uapi/linux/devlink.h b/include/uapi/linux/devlink.h
index 8f3c5dd..a024b25 100644
--- a/include/uapi/linux/devlink.h
+++ b/include/uapi/linux/devlink.h
@@ -85,6 +85,8 @@ enum devlink_command {
DEVLINK_CMD_PORT_PARAM_GET, /* can dump */
DEVLINK_CMD_PORT_PARAM_SET,
+ DEVLINK_CMD_PORT_PARAM_NEW,
+ DEVLINK_CMD_PORT_PARAM_DEL,
DEVLINK_CMD_REGION_GET,
DEVLINK_CMD_REGION_SET,
diff --git a/net/core/devlink.c b/net/core/devlink.c
index 4f0052d..7598da1 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -2882,7 +2882,9 @@ static int devlink_nl_param_fill(struct sk_buff *msg, struct devlink *devlink,
if (devlink_nl_put_handle(msg, devlink))
goto genlmsg_cancel;
- if (cmd == DEVLINK_CMD_PORT_PARAM_GET)
+ if (cmd == DEVLINK_CMD_PORT_PARAM_GET ||
+ cmd == DEVLINK_CMD_PORT_PARAM_NEW ||
+ cmd == DEVLINK_CMD_PORT_PARAM_DEL)
if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, port_index))
goto genlmsg_cancel;
@@ -2928,18 +2930,22 @@ static int devlink_nl_param_fill(struct sk_buff *msg, struct devlink *devlink,
}
static void devlink_param_notify(struct devlink *devlink,
+ unsigned int port_index,
struct devlink_param_item *param_item,
enum devlink_command cmd)
{
struct sk_buff *msg;
int err;
- WARN_ON(cmd != DEVLINK_CMD_PARAM_NEW && cmd != DEVLINK_CMD_PARAM_DEL);
+ WARN_ON(cmd != DEVLINK_CMD_PARAM_NEW && cmd != DEVLINK_CMD_PARAM_DEL &&
+ cmd != DEVLINK_CMD_PORT_PARAM_NEW &&
+ cmd != DEVLINK_CMD_PORT_PARAM_DEL);
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return;
- err = devlink_nl_param_fill(msg, devlink, 0, param_item, cmd, 0, 0, 0);
+ err = devlink_nl_param_fill(msg, devlink, port_index, param_item, cmd,
+ 0, 0, 0);
if (err) {
nlmsg_free(msg);
return;
@@ -3097,6 +3103,7 @@ static int devlink_nl_cmd_param_get_doit(struct sk_buff *skb,
}
static int __devlink_nl_cmd_param_set_doit(struct devlink *devlink,
+ unsigned int port_index,
struct list_head *param_list,
struct genl_info *info,
enum devlink_command cmd)
@@ -3149,7 +3156,7 @@ static int __devlink_nl_cmd_param_set_doit(struct devlink *devlink,
return err;
}
- devlink_param_notify(devlink, param_item, cmd);
+ devlink_param_notify(devlink, port_index, param_item, cmd);
return 0;
}
@@ -3158,13 +3165,15 @@ static int devlink_nl_cmd_param_set_doit(struct sk_buff *skb,
{
struct devlink *devlink = info->user_ptr[0];
- return __devlink_nl_cmd_param_set_doit(devlink, &devlink->param_list,
+ return __devlink_nl_cmd_param_set_doit(devlink, 0, &devlink->param_list,
info, DEVLINK_CMD_PARAM_NEW);
}
static int devlink_param_register_one(struct devlink *devlink,
+ unsigned int port_index,
struct list_head *param_list,
- const struct devlink_param *param)
+ const struct devlink_param *param,
+ enum devlink_command cmd)
{
struct devlink_param_item *param_item;
@@ -3182,19 +3191,21 @@ static int devlink_param_register_one(struct devlink *devlink,
param_item->param = param;
list_add_tail(¶m_item->list, param_list);
- devlink_param_notify(devlink, param_item, DEVLINK_CMD_PARAM_NEW);
+ devlink_param_notify(devlink, port_index, param_item, cmd);
return 0;
}
static void devlink_param_unregister_one(struct devlink *devlink,
+ unsigned int port_index,
struct list_head *param_list,
- const struct devlink_param *param)
+ const struct devlink_param *param,
+ enum devlink_command cmd)
{
struct devlink_param_item *param_item;
param_item = devlink_param_find_by_name(param_list, param->name);
WARN_ON(!param_item);
- devlink_param_notify(devlink, param_item, DEVLINK_CMD_PARAM_DEL);
+ devlink_param_notify(devlink, port_index, param_item, cmd);
list_del(¶m_item->list);
kfree(param_item);
}
@@ -3309,8 +3320,9 @@ static int devlink_nl_cmd_port_param_set_doit(struct sk_buff *skb,
struct devlink_port *devlink_port = info->user_ptr[0];
return __devlink_nl_cmd_param_set_doit(devlink_port->devlink,
- &devlink_port->param_list,
- info, 0);
+ devlink_port->index,
+ &devlink_port->param_list, info,
+ DEVLINK_CMD_PORT_PARAM_NEW);
}
static int devlink_nl_region_snapshot_id_put(struct sk_buff *msg,
@@ -4648,8 +4660,9 @@ int devlink_params_register(struct devlink *devlink,
if (err)
goto rollback;
}
- err = devlink_param_register_one(devlink, &devlink->param_list,
- param);
+ err = devlink_param_register_one(devlink, 0,
+ &devlink->param_list, param,
+ DEVLINK_CMD_PARAM_NEW);
if (err)
goto rollback;
}
@@ -4661,8 +4674,8 @@ int devlink_params_register(struct devlink *devlink,
if (!i)
goto unlock;
for (param--; i > 0; i--, param--)
- devlink_param_unregister_one(devlink, &devlink->param_list,
- param);
+ devlink_param_unregister_one(devlink, 0, &devlink->param_list,
+ param, DEVLINK_CMD_PARAM_DEL);
unlock:
mutex_unlock(&devlink->lock);
return err;
@@ -4684,8 +4697,8 @@ void devlink_params_unregister(struct devlink *devlink,
mutex_lock(&devlink->lock);
for (i = 0; i < params_count; i++, param++)
- devlink_param_unregister_one(devlink, &devlink->param_list,
- param);
+ devlink_param_unregister_one(devlink, 0, &devlink->param_list,
+ param, DEVLINK_CMD_PARAM_DEL);
mutex_unlock(&devlink->lock);
}
EXPORT_SYMBOL_GPL(devlink_params_unregister);
@@ -4737,6 +4750,7 @@ int devlink_param_driverinit_value_get(struct devlink *devlink, u32 param_id,
static int
__devlink_param_driverinit_value_set(struct devlink *devlink,
+ unsigned int port_index,
struct list_head *param_list,
u32 param_id,
union devlink_param_value init_val,
@@ -4757,7 +4771,7 @@ int devlink_param_driverinit_value_get(struct devlink *devlink, u32 param_id,
else
param_item->driverinit_value = init_val;
param_item->driverinit_value_valid = true;
- devlink_param_notify(devlink, param_item, cmd);
+ devlink_param_notify(devlink, port_index, param_item, cmd);
return 0;
}
@@ -4777,7 +4791,7 @@ int devlink_param_driverinit_value_get(struct devlink *devlink, u32 param_id,
int devlink_param_driverinit_value_set(struct devlink *devlink, u32 param_id,
union devlink_param_value init_val)
{
- return __devlink_param_driverinit_value_set(devlink,
+ return __devlink_param_driverinit_value_set(devlink, 0,
&devlink->param_list,
param_id, init_val,
DEVLINK_CMD_PARAM_NEW);
@@ -4804,7 +4818,7 @@ void devlink_param_value_changed(struct devlink *devlink, u32 param_id)
param_item = devlink_param_find_by_id(&devlink->param_list, param_id);
WARN_ON(!param_item);
- devlink_param_notify(devlink, param_item, DEVLINK_CMD_PARAM_NEW);
+ devlink_param_notify(devlink, 0, param_item, DEVLINK_CMD_PARAM_NEW);
}
EXPORT_SYMBOL_GPL(devlink_param_value_changed);
@@ -4859,8 +4873,10 @@ int devlink_port_params_register(struct devlink_port *devlink_port,
goto rollback;
}
err = devlink_param_register_one(devlink_port->devlink,
+ devlink_port->index,
&devlink_port->param_list,
- param);
+ param,
+ DEVLINK_CMD_PORT_PARAM_NEW);
if (err)
goto rollback;
}
@@ -4873,8 +4889,9 @@ int devlink_port_params_register(struct devlink_port *devlink_port,
goto unlock;
for (param--; i > 0; i--, param--)
devlink_param_unregister_one(devlink_port->devlink,
- &devlink_port->param_list,
- param);
+ devlink_port->index,
+ &devlink_port->param_list, param,
+ DEVLINK_CMD_PORT_PARAM_DEL);
unlock:
mutex_unlock(&devlink->lock);
return err;
@@ -4900,8 +4917,9 @@ void devlink_port_params_unregister(struct devlink_port *devlink_port,
mutex_lock(&devlink->lock);
for (i = 0; i < params_count; i++, param++)
devlink_param_unregister_one(devlink_port->devlink,
+ devlink_port->index,
&devlink_port->param_list,
- param);
+ param, DEVLINK_CMD_PORT_PARAM_DEL);
mutex_unlock(&devlink->lock);
}
EXPORT_SYMBOL_GPL(devlink_port_params_unregister);
@@ -4948,12 +4966,41 @@ int devlink_port_param_driverinit_value_set(struct devlink_port *devlink_port,
union devlink_param_value init_val)
{
return __devlink_param_driverinit_value_set(devlink_port->devlink,
+ devlink_port->index,
&devlink_port->param_list,
- param_id, init_val, 0);
+ param_id, init_val,
+ DEVLINK_CMD_PORT_PARAM_NEW);
}
EXPORT_SYMBOL_GPL(devlink_port_param_driverinit_value_set);
/**
+ * devlink_port_param_value_changed - notify devlink on a parameter's value
+ * change. Should be called by the driver
+ * right after the change.
+ *
+ * @devlink_port: devlink_port
+ * @param_id: parameter ID
+ *
+ * This function should be used by the driver to notify devlink on value
+ * change, excluding driverinit configuration mode.
+ * For driverinit configuration mode driver should use the function
+ * devlink_port_param_driverinit_value_set() instead.
+ */
+void devlink_port_param_value_changed(struct devlink_port *devlink_port,
+ u32 param_id)
+{
+ struct devlink_param_item *param_item;
+
+ param_item = devlink_param_find_by_id(&devlink_port->param_list,
+ param_id);
+ WARN_ON(!param_item);
+
+ devlink_param_notify(devlink_port->devlink, devlink_port->index,
+ param_item, DEVLINK_CMD_PORT_PARAM_NEW);
+}
+EXPORT_SYMBOL_GPL(devlink_port_param_value_changed);
+
+/**
* devlink_region_create - create a new address region
*
* @devlink: devlink
--
1.8.3.1
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