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devlink: implement line card active state 

Allow driver to mark a line card as active. Expose this state to the
userspace over devlink netlink interface with proper notifications.
'active' state means that line card was plugged in after
being provisioned.

Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jiri Pirko 2022-04-18 09:42:27 +03:00 committed by David S. Miller
parent fcdc8ce23a
commit fc9f50d5b3
4 changed files with 50 additions and 5 deletions
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11
Documentation/networking/devlink/devlink-linecard.rst
View File

@ -66,6 +66,7 @@ The ``devlink-linecard`` mechanism supports the following line card states:
with a line card type.
* ``provisioning_failed``: Provisioning was not successful.
* ``provisioned``: Line card slot is provisioned with a type.
* ``active``: Line card is powered-up and active.
The following diagram provides a general overview of ``devlink-linecard``
state transitions::
@ -85,11 +86,11 @@ state transitions::
| |
| +-----------------------------+
| | |
| +------------v------------+ +------------v------------+
| | | | |
+----- provisioning_failed | | provisioned |
| | | | |
| +------------^------------+ +------------|------------+
| +------------v------------+ +------------v------------+ +-------------------------+
| | | | ----> |
+----- provisioning_failed | | provisioned | | active |
| | | | <---- |
| +------------^------------+ +------------|------------+ +-------------------------+
| | |
| | |
| | +------------v------------+

2
include/net/devlink.h
View File

@ -1579,6 +1579,8 @@ void devlink_linecard_provision_set(struct devlink_linecard *linecard,
const char *type);
void devlink_linecard_provision_clear(struct devlink_linecard *linecard);
void devlink_linecard_provision_fail(struct devlink_linecard *linecard);
void devlink_linecard_activate(struct devlink_linecard *linecard);
void devlink_linecard_deactivate(struct devlink_linecard *linecard);
int devlink_sb_register(struct devlink *devlink, unsigned int sb_index,
u32 size, u16 ingress_pools_count,
u16 egress_pools_count, u16 ingress_tc_count,

1
include/uapi/linux/devlink.h
View File

@ -350,6 +350,7 @@ enum devlink_linecard_state {
DEVLINK_LINECARD_STATE_PROVISIONING,
DEVLINK_LINECARD_STATE_PROVISIONING_FAILED,
DEVLINK_LINECARD_STATE_PROVISIONED,
DEVLINK_LINECARD_STATE_ACTIVE,
__DEVLINK_LINECARD_STATE_MAX,
DEVLINK_LINECARD_STATE_MAX = __DEVLINK_LINECARD_STATE_MAX - 1

41
net/core/devlink.c
View File

@ -10331,6 +10331,47 @@ void devlink_linecard_provision_fail(struct devlink_linecard *linecard)
}
EXPORT_SYMBOL_GPL(devlink_linecard_provision_fail);
/**
* devlink_linecard_activate - Set linecard active
*
* @linecard: devlink linecard
*/
void devlink_linecard_activate(struct devlink_linecard *linecard)
{
mutex_lock(&linecard->state_lock);
WARN_ON(linecard->state != DEVLINK_LINECARD_STATE_PROVISIONED);
linecard->state = DEVLINK_LINECARD_STATE_ACTIVE;
devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
mutex_unlock(&linecard->state_lock);
}
EXPORT_SYMBOL_GPL(devlink_linecard_activate);
/**
* devlink_linecard_deactivate - Set linecard inactive
*
* @linecard: devlink linecard
*/
void devlink_linecard_deactivate(struct devlink_linecard *linecard)
{
mutex_lock(&linecard->state_lock);
switch (linecard->state) {
case DEVLINK_LINECARD_STATE_ACTIVE:
linecard->state = DEVLINK_LINECARD_STATE_PROVISIONED;
devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
break;
case DEVLINK_LINECARD_STATE_UNPROVISIONING:
/* Line card is being deactivated as part
* of unprovisioning flow.
*/
break;
default:
WARN_ON(1);
break;
}
mutex_unlock(&linecard->state_lock);
}
EXPORT_SYMBOL_GPL(devlink_linecard_deactivate);
int devlink_sb_register(struct devlink *devlink, unsigned int sb_index,
u32 size, u16 ingress_pools_count,
u16 egress_pools_count, u16 ingress_tc_count,