[patch net-next RFCv2 03/10] devlink: implement line card active state

[Jiri Pirko]

From: Jiri Pirko <j...@nvidia.com>

Allow driver to mark a linecard as active. Expose this state to the
userspace over devlink netlink interface with proper notifications.

Signed-off-by: Jiri Pirko <j...@nvidia.com>
---
RFC->RFCv2:
- s/deactive/inactive in function comment
- removed is_active() helper which is no longer needed
---
 include/net/devlink.h        |  3 +++
 include/uapi/linux/devlink.h |  1 +
 net/core/devlink.c           | 30 ++++++++++++++++++++++++++++++
 3 files changed, 34 insertions(+)

diff --git a/include/net/devlink.h b/include/net/devlink.h
index bca3b2fc180a..f3b0e88add90 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -149,6 +149,7 @@ struct devlink_linecard {
        void *priv;
        enum devlink_linecard_state state;
        const char *type;
+       bool active;
 };
 
 /**
@@ -1445,6 +1446,8 @@ void devlink_linecard_provision_set(struct 
devlink_linecard *linecard,
                                    u32 type_index);
 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,
diff --git a/include/uapi/linux/devlink.h b/include/uapi/linux/devlink.h
index 24091391fa89..a27b20dc38b8 100644
--- a/include/uapi/linux/devlink.h
+++ b/include/uapi/linux/devlink.h
@@ -336,6 +336,7 @@ 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
diff --git a/net/core/devlink.c b/net/core/devlink.c
index 2ff950da3417..1725820dd045 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -8826,6 +8826,36 @@ void devlink_linecard_provision_fail(struct 
devlink_linecard *linecard)
 }
 EXPORT_SYMBOL_GPL(devlink_linecard_provision_fail);
 
+/**
+ *     devlink_linecard_activate - Set linecard active
+ *
+ *     @devlink_linecard: devlink linecard
+ */
+void devlink_linecard_activate(struct devlink_linecard *linecard)
+{
+       mutex_lock(&linecard->devlink->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->devlink->lock);
+}
+EXPORT_SYMBOL_GPL(devlink_linecard_activate);
+
+/**
+ *     devlink_linecard_deactivate - Set linecard inactive
+ *
+ *     @devlink_linecard: devlink linecard
+ */
+void devlink_linecard_deactivate(struct devlink_linecard *linecard)
+{
+       mutex_lock(&linecard->devlink->lock);
+       WARN_ON(linecard->state != DEVLINK_LINECARD_STATE_ACTIVE);
+       linecard->state = DEVLINK_LINECARD_STATE_PROVISIONED;
+       devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
+       mutex_unlock(&linecard->devlink->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,
-- 
2.26.2