[PATCH net-next V5 04/12] netdevsim: Add devlink port resource registration

Tariq Toukan
2026-04-07T19:42:47Z

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

Signed-off-by: Or Har-Toov <ohartoov@nvidia.com>
Reviewed-by: Shay Drori <shayd@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
---
drivers/net/netdevsim/dev.c | 23 ++++++++++++++++++++++-
drivers/net/netdevsim/netdevsim.h | 4 ++++
2 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/drivers/net/netdevsim/dev.c b/drivers/net/netdevsim/dev.c
index e82de0fd3157..1e06e781c835 100644
--- a/drivers/net/netdevsim/dev.c
+++ b/drivers/net/netdevsim/dev.c
@@ -1486,9 +1486,25 @@ 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,
+ "test_resource", 20,
+ NSIM_PORT_RESOURCE_TEST,
+ 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 +1527,9 @@ 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 +1546,8 @@ 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 c904e14f6b3f..c7de53706ec4 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_TEST = 1,
+};
+
struct nsim_dev_health {
struct devlink_health_reporter *empty_reporter;
struct devlink_health_reporter *dummy_reporter;
--
2.44.0