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devlink: Add devlink_param for port register and unregister

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Add functions to register and unregister for the driver supported
configuration parameters table per port.

v7->v8:
- Order the definitions following way as suggested by Jiri.
__devlink_params_register
__devlink_params_unregister
devlink_params_register
devlink_params_unregister
devlink_port_params_register
devlink_port_params_unregister
- Append with Acked-by: Jiri Pirko <jiri@mellanox.com>.

v2->v3:
- Add a helper __devlink_params_register() with common code used by
  both devlink_params_register() and devlink_port_params_register().

Cc: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vasundhara Volam 2019-01-28 18:00:20 +05:30 committed by David S. Miller
parent eaf2a47f40
commit 39e6160e14
2 changed files with 126 additions and 47 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
include/net/devlink.h
View File

@ -48,6 +48,7 @@ struct devlink_port_attrs {
struct devlink_port {
struct list_head list;
struct list_head param_list;
struct devlink *devlink;
unsigned index;
bool registered;
@ -567,6 +568,12 @@ 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_port_params_register(struct devlink_port *devlink_port,
const struct devlink_param *params,
size_t params_count);
void devlink_port_params_unregister(struct devlink_port *devlink_port,
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,
@ -791,6 +798,21 @@ devlink_params_unregister(struct devlink *devlink,
}
static inline int
devlink_port_params_register(struct devlink_port *devlink_port,
const struct devlink_param *params,
size_t params_count)
{
return 0;
}
static inline void
devlink_port_params_unregister(struct devlink_port *devlink_port,
const struct devlink_param *params,
size_t params_count)
{
}
static inline int
devlink_param_driverinit_value_get(struct devlink *devlink, u32 param_id,
union devlink_param_value *init_val)

151
net/core/devlink.c
View File

@ -3147,12 +3147,12 @@ static int devlink_nl_cmd_param_set_doit(struct sk_buff *skb,
}
static int devlink_param_register_one(struct devlink *devlink,
struct list_head *param_list,
const struct devlink_param *param)
{
struct devlink_param_item *param_item;
if (devlink_param_find_by_name(&devlink->param_list,
param->name))
if (devlink_param_find_by_name(param_list, param->name))
return -EEXIST;
if (param->supported_cmodes == BIT(DEVLINK_PARAM_CMODE_DRIVERINIT))
@ -3165,18 +3165,18 @@ static int devlink_param_register_one(struct devlink *devlink,
return -ENOMEM;
param_item->param = param;
list_add_tail(&param_item->list, &devlink->param_list);
list_add_tail(&param_item->list, param_list);
devlink_param_notify(devlink, param_item, DEVLINK_CMD_PARAM_NEW);
return 0;
}
static void devlink_param_unregister_one(struct devlink *devlink,
struct list_head *param_list,
const struct devlink_param *param)
{
struct devlink_param_item *param_item;
param_item = devlink_param_find_by_name(&devlink->param_list,
param->name);
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);
list_del(&param_item->list);
@ -3954,6 +3954,7 @@ int devlink_port_register(struct devlink *devlink,
devlink_port->index = port_index;
devlink_port->registered = true;
list_add_tail(&devlink_port->list, &devlink->port_list);
INIT_LIST_HEAD(&devlink_port->param_list);
mutex_unlock(&devlink->lock);
devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
return 0;
@ -4471,6 +4472,63 @@ void devlink_resource_occ_get_unregister(struct devlink *devlink,
}
EXPORT_SYMBOL_GPL(devlink_resource_occ_get_unregister);
static int devlink_param_verify(const struct devlink_param *param)
{
if (!param || !param->name || !param->supported_cmodes)
return -EINVAL;
if (param->generic)
return devlink_param_generic_verify(param);
else
return devlink_param_driver_verify(param);
}
static int __devlink_params_register(struct devlink *devlink,
struct list_head *param_list,
const struct devlink_param *params,
size_t params_count)
{
const struct devlink_param *param = params;
int i;
int err;
mutex_lock(&devlink->lock);
for (i = 0; i < params_count; i++, param++) {
err = devlink_param_verify(param);
if (err)
goto rollback;
err = devlink_param_register_one(devlink, param_list, param);
if (err)
goto rollback;
}
mutex_unlock(&devlink->lock);
return 0;
rollback:
if (!i)
goto unlock;
for (param--; i > 0; i--, param--)
devlink_param_unregister_one(devlink, param_list, param);
unlock:
mutex_unlock(&devlink->lock);
return err;
}
static void __devlink_params_unregister(struct devlink *devlink,
struct list_head *param_list,
const struct devlink_param *params,
size_t params_count)
{
const struct devlink_param *param = params;
int i;
mutex_lock(&devlink->lock);
for (i = 0; i < params_count; i++, param++)
devlink_param_unregister_one(devlink, param_list, param);
mutex_unlock(&devlink->lock);
}
/**
* devlink_params_register - register configuration parameters
*
@ -4484,41 +4542,8 @@ int devlink_params_register(struct devlink *devlink,
const struct devlink_param *params,
size_t params_count)
{
const struct devlink_param *param = params;
int i;
int err;
mutex_lock(&devlink->lock);
for (i = 0; i < params_count; i++, param++) {
if (!param || !param->name || !param->supported_cmodes) {
err = -EINVAL;
goto rollback;
}
if (param->generic) {
err = devlink_param_generic_verify(param);
if (err)
goto rollback;
} else {
err = devlink_param_driver_verify(param);
if (err)
goto rollback;
}
err = devlink_param_register_one(devlink, param);
if (err)
goto rollback;
}
mutex_unlock(&devlink->lock);
return 0;
rollback:
if (!i)
goto unlock;
for (param--; i > 0; i--, param--)
devlink_param_unregister_one(devlink, param);
unlock:
mutex_unlock(&devlink->lock);
return err;
return __devlink_params_register(devlink, &devlink->param_list, params,
params_count);
}
EXPORT_SYMBOL_GPL(devlink_params_register);
@ -4532,16 +4557,48 @@ void devlink_params_unregister(struct devlink *devlink,
const struct devlink_param *params,
size_t params_count)
{
const struct devlink_param *param = params;
int i;
mutex_lock(&devlink->lock);
for (i = 0; i < params_count; i++, param++)
devlink_param_unregister_one(devlink, param);
mutex_unlock(&devlink->lock);
return __devlink_params_unregister(devlink, &devlink->param_list,
params, params_count);
}
EXPORT_SYMBOL_GPL(devlink_params_unregister);
/**
* devlink_port_params_register - register port configuration parameters
*
* @devlink_port: devlink port
* @params: configuration parameters array
* @params_count: number of parameters provided
*
* Register the configuration parameters supported by the port.
*/
int devlink_port_params_register(struct devlink_port *devlink_port,
const struct devlink_param *params,
size_t params_count)
{
return __devlink_params_register(devlink_port->devlink,
&devlink_port->param_list, params,
params_count);
}
EXPORT_SYMBOL_GPL(devlink_port_params_register);
/**
* devlink_port_params_unregister - unregister port configuration
* parameters
*
* @devlink_port: devlink port
* @params: configuration parameters array
* @params_count: number of parameters provided
*/
void devlink_port_params_unregister(struct devlink_port *devlink_port,
const struct devlink_param *params,
size_t params_count)
{
return __devlink_params_unregister(devlink_port->devlink,
&devlink_port->param_list,
params, params_count);
}
EXPORT_SYMBOL_GPL(devlink_port_params_unregister);
/**
* devlink_param_driverinit_value_get - get configuration parameter
* value for driver initializing