linux-kernel - [PATCH net-next 3/5] netdevsim: Add devlink port resource registration

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Message-ID: <20260203071033.1709445-4-tariqt@nvidia.com>
Date: Tue, 3 Feb 2026 09:10:31 +0200
From: Tariq Toukan <tariqt@...dia.com>
To: Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>, Andrew Lunn <andrew+netdev@...n.ch>, "David
 S. Miller" <davem@...emloft.net>
CC: Donald Hunter <donald.hunter@...il.com>, Jiri Pirko <jiri@...nulli.us>,
	Jonathan Corbet <corbet@....net>, Saeed Mahameed <saeedm@...dia.com>, "Leon
 Romanovsky" <leon@...nel.org>, Tariq Toukan <tariqt@...dia.com>, Mark Bloch
	<mbloch@...dia.com>, Shuah Khan <shuah@...nel.org>, <netdev@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <linux-doc@...r.kernel.org>,
	<linux-rdma@...r.kernel.org>, <linux-kselftest@...r.kernel.org>, Gal Pressman
	<gal@...dia.com>, Moshe Shemesh <moshe@...dia.com>, Shay Drori
	<shayd@...dia.com>, Jiri Pirko <jiri@...dia.com>, Or Har-Toov
	<ohartoov@...dia.com>
Subject: [PATCH net-next 3/5] netdevsim: Add devlink port resource registration

From: Or Har-Toov <ohartoov@...dia.com>

Register port-level resources for netdevsim ports to enable testing
of the port resource infrastructure.

Signed-off-by: Or Har-Toov <ohartoov@...dia.com>
Reviewed-by: Shay Drori <shayd@...dia.com>
Reviewed-by: Moshe Shemesh <moshe@...dia.com>
Signed-off-by: Tariq Toukan <tariqt@...dia.com>
---
 drivers/net/netdevsim/dev.c       | 22 +++++++++++++++++++++-
 drivers/net/netdevsim/netdevsim.h |  4 ++++
 2 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/drivers/net/netdevsim/dev.c b/drivers/net/netdevsim/dev.c
index dfd571b22107..ebda1b961664 100644
--- a/drivers/net/netdevsim/dev.c
+++ b/drivers/net/netdevsim/dev.c
@@ -1486,9 +1486,24 @@ static int __nsim_dev_port_add(struct nsim_dev *nsim_dev, enum nsim_dev_port_typ
 	if (err)
 		goto err_port_free;
 
+	if (nsim_dev_port_is_pf(nsim_dev_port)) {
+		u64 parent_id = DEVLINK_RESOURCE_ID_PARENT_TOP;
+		struct devlink_resource_size_params params = {
+			.size_max = 100,
+			.size_granularity = 1,
+			.unit = DEVLINK_RESOURCE_UNIT_ENTRY
+		};
+
+		err = devl_port_resource_register(devlink_port, "max_sfs", 20,
+						  NSIM_PORT_RESOURCE_MAX_SFS,
+						  parent_id, &params);
+		if (err)
+			goto err_dl_port_unregister;
+	}
+
 	err = nsim_dev_port_debugfs_init(nsim_dev, nsim_dev_port);
 	if (err)
-		goto err_dl_port_unregister;
+		goto err_port_resource_unregister;
 
 	nsim_dev_port->ns = nsim_create(nsim_dev, nsim_dev_port, perm_addr);
 	if (IS_ERR(nsim_dev_port->ns)) {
@@ -1511,6 +1526,9 @@ static int __nsim_dev_port_add(struct nsim_dev *nsim_dev, enum nsim_dev_port_typ
 	nsim_destroy(nsim_dev_port->ns);
 err_port_debugfs_exit:
 	nsim_dev_port_debugfs_exit(nsim_dev_port);
+err_port_resource_unregister:
+	if (nsim_dev_port_is_pf(nsim_dev_port))
+		devl_port_resources_unregister(devlink_port);
 err_dl_port_unregister:
 	devl_port_unregister(devlink_port);
 err_port_free:
@@ -1527,6 +1545,8 @@ static void __nsim_dev_port_del(struct nsim_dev_port *nsim_dev_port)
 		devl_rate_leaf_destroy(&nsim_dev_port->devlink_port);
 	nsim_destroy(nsim_dev_port->ns);
 	nsim_dev_port_debugfs_exit(nsim_dev_port);
+	if (nsim_dev_port_is_pf(nsim_dev_port))
+		devl_port_resources_unregister(devlink_port);
 	devl_port_unregister(devlink_port);
 	kfree(nsim_dev_port);
 }
diff --git a/drivers/net/netdevsim/netdevsim.h b/drivers/net/netdevsim/netdevsim.h
index f767fc8a7505..11ea1a52924a 100644
--- a/drivers/net/netdevsim/netdevsim.h
+++ b/drivers/net/netdevsim/netdevsim.h
@@ -224,6 +224,10 @@ enum nsim_resource_id {
 	NSIM_RESOURCE_NEXTHOPS,
 };
 
+enum nsim_port_resource_id {
+	NSIM_PORT_RESOURCE_MAX_SFS = 1,
+};
+
 struct nsim_dev_health {
 	struct devlink_health_reporter *empty_reporter;
 	struct devlink_health_reporter *dummy_reporter;
-- 
2.40.1