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devlink: Allow setting tx rate for devlink rate leaf objects

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Implement support for DEVLINK_CMD_RATE_SET command with new attributes
DEVLINK_ATTR_RATE_TX_{SHARE|MAX} that are used to set devlink rate
shared/max tx rate values. Extend devlink ops with new callbacks
rate_leaf_tx_{share|max}_set() to allow supporting drivers to implement
rate control through devlink.

New attributes are optional. Driver implementations are allowed to
support either or both of them.

Shared rate example:

$ devlink port function rate set netdevsim/netdevsim10/0 tx_share 10mbit

$ devlink port function rate show netdevsim/netdevsim10/0
netdevsim/netdevsim10/0: type leaf tx_share 10mbit

Max rate example:

$ devlink port function rate set netdevsim/netdevsim10/0 tx_max 100mbit

$ devlink port function rate show netdevsim/netdevsim10/0
netdevsim/netdevsim10/0: type leaf tx_max 100mbit

Co-developed-by: Vlad Buslov <vladbu@nvidia.com>
Signed-off-by: Vlad Buslov <vladbu@nvidia.com>
Signed-off-by: Dmytro Linkin <dlinkin@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Dmytro Linkin
2021-06-02 15:17:22 +03:00
committed by David S. Miller
parent a27d8e352b
commit 1897db2ec3
3 changed files with 98 additions and 0 deletions
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10
include/net/devlink.h
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@@ -139,6 +139,8 @@ struct devlink_rate {
enum devlink_rate_type type;
struct devlink *devlink;
void *priv;
u64 tx_share;
u64 tx_max;
struct devlink_port *devlink_port;
};
@@ -1465,6 +1467,14 @@ struct devlink_ops {
struct devlink_port *port,
enum devlink_port_fn_state state,
struct netlink_ext_ack *extack);
/**
* Rate control callbacks.
*/
int (*rate_leaf_tx_share_set)(struct devlink_rate *devlink_rate, void *priv,
u64 tx_share, struct netlink_ext_ack *extack);
int (*rate_leaf_tx_max_set)(struct devlink_rate *devlink_rate, void *priv,
u64 tx_max, struct netlink_ext_ack *extack);
};
static inline void *devlink_priv(struct devlink *devlink)