sonic-buildimage/platform/mellanox/non-upstream-patches/patches/0127-devlink-implement-line-card-active-state.patch

From 999c148a0a19a6a6c96dbc5b6615285d80c28de9 Mon Sep 17 00:00:00 2001
From: Jiri Pirko <jiri@nvidia.com>
Date: Wed, 6 Jan 2021 16:03:43 +0100
Subject: [PATCH] devlink: implement line card active state

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 <jiri@nvidia.com>
---
 include/net/devlink.h        |  3 +++
 include/uapi/linux/devlink.h |  1 +
 net/core/devlink.c           | 36 ++++++++++++++++++++++++++++++++++++
 3 files changed, 40 insertions(+)

diff --git a/include/net/devlink.h b/include/net/devlink.h
index 44b60085e..d9b2b559c 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -157,6 +157,7 @@ struct devlink_linecard {
 	const char *type;
 	struct devlink_linecard_type *types;
 	unsigned int types_count;
+	bool active;
 };
 
 /**
@@ -1453,6 +1454,8 @@ 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,
diff --git a/include/uapi/linux/devlink.h b/include/uapi/linux/devlink.h
index d88336645..5ace55666 100644
--- a/include/uapi/linux/devlink.h
+++ b/include/uapi/linux/devlink.h
@@ -341,6 +341,7 @@ 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 943973ffc..724633810 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -9001,6 +9001,42 @@ 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->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
+ *
+ *	@devlink_linecard: devlink linecard
+ */
+void devlink_linecard_deactivate(struct devlink_linecard *linecard)
+{
+	bool should_notify = false;
+
+	mutex_lock(&linecard->state_lock);
+	if (linecard->state != DEVLINK_LINECARD_STATE_UNPROVISIONING) {
+		WARN_ON(linecard->state != DEVLINK_LINECARD_STATE_ACTIVE);
+		linecard->state = DEVLINK_LINECARD_STATE_PROVISIONED;
+		should_notify = true;
+	}
+	if (should_notify)
+		devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
+	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,
-- 
2.30.2