From 7be3163c49b24bf923d32f333096963159e03a14 Mon Sep 17 00:00:00 2001
From: Or Har-Toov <ohartoov@nvidia.com>
Date: Tue, 7 Apr 2026 22:40:56 +0300
Subject: [PATCH 01/12] devlink: Refactor resource functions to be generic

Currently the resource functions take devlink pointer as parameter
and take the resource list from there.
Allow resource functions to work with other resource lists that will
be added in next patches and not only with the devlink's resource list.

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>
Link: https://patch.msgid.link/20260407194107.148063-2-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 include/net/devlink.h  |   2 +-
 net/devlink/resource.c | 118 ++++++++++++++++++++++++++---------------
 2 files changed, 75 insertions(+), 45 deletions(-)

diff --git a/include/net/devlink.h b/include/net/devlink.h
index 3038af6ec017..f5439d050eb0 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -1885,7 +1885,7 @@ int devl_resource_register(struct devlink *devlink,
 			   u64 resource_size,
 			   u64 resource_id,
 			   u64 parent_resource_id,
-			   const struct devlink_resource_size_params *size_params);
+			   const struct devlink_resource_size_params *params);
 void devl_resources_unregister(struct devlink *devlink);
 void devlink_resources_unregister(struct devlink *devlink);
 int devl_resource_size_get(struct devlink *devlink,
diff --git a/net/devlink/resource.c b/net/devlink/resource.c
index 351835a710b1..ee169a467d48 100644
--- a/net/devlink/resource.c
+++ b/net/devlink/resource.c
@@ -36,15 +36,16 @@ struct devlink_resource {
 };
 
 static struct devlink_resource *
-devlink_resource_find(struct devlink *devlink,
-		      struct devlink_resource *resource, u64 resource_id)
+__devlink_resource_find(struct list_head *resource_list_head,
+			struct devlink_resource *resource,
+			u64 resource_id)
 {
 	struct list_head *resource_list;
 
 	if (resource)
 		resource_list = &resource->resource_list;
 	else
-		resource_list = &devlink->resource_list;
+		resource_list = resource_list_head;
 
 	list_for_each_entry(resource, resource_list, list) {
 		struct devlink_resource *child_resource;
@@ -52,14 +53,23 @@ devlink_resource_find(struct devlink *devlink,
 		if (resource->id == resource_id)
 			return resource;
 
-		child_resource = devlink_resource_find(devlink, resource,
-						       resource_id);
+		child_resource = __devlink_resource_find(resource_list_head,
+							 resource,
+							 resource_id);
 		if (child_resource)
 			return child_resource;
 	}
 	return NULL;
 }
 
+static struct devlink_resource *
+devlink_resource_find(struct devlink *devlink,
+		      struct devlink_resource *resource, u64 resource_id)
+{
+	return __devlink_resource_find(&devlink->resource_list,
+				       resource, resource_id);
+}
+
 static void
 devlink_resource_validate_children(struct devlink_resource *resource)
 {
@@ -314,26 +324,12 @@ int devlink_resources_validate(struct devlink *devlink,
 	return err;
 }
 
-/**
- * devl_resource_register - devlink resource register
- *
- * @devlink: devlink
- * @resource_name: resource's name
- * @resource_size: resource's size
- * @resource_id: resource's id
- * @parent_resource_id: resource's parent id
- * @size_params: size parameters
- *
- * Generic resources should reuse the same names across drivers.
- * Please see the generic resources list at:
- * Documentation/networking/devlink/devlink-resource.rst
- */
-int devl_resource_register(struct devlink *devlink,
-			   const char *resource_name,
-			   u64 resource_size,
-			   u64 resource_id,
-			   u64 parent_resource_id,
-			   const struct devlink_resource_size_params *size_params)
+static int
+__devl_resource_register(struct devlink *devlink,
+			 struct list_head *resource_list_head,
+			 const char *resource_name, u64 resource_size,
+			 u64 resource_id, u64 parent_resource_id,
+			 const struct devlink_resource_size_params *params)
 {
 	struct devlink_resource *resource;
 	struct list_head *resource_list;
@@ -343,7 +339,8 @@ int devl_resource_register(struct devlink *devlink,
 
 	top_hierarchy = parent_resource_id == DEVLINK_RESOURCE_ID_PARENT_TOP;
 
-	resource = devlink_resource_find(devlink, NULL, resource_id);
+	resource = __devlink_resource_find(resource_list_head, NULL,
+					   resource_id);
 	if (resource)
 		return -EEXIST;
 
@@ -352,12 +349,13 @@ int devl_resource_register(struct devlink *devlink,
 		return -ENOMEM;
 
 	if (top_hierarchy) {
-		resource_list = &devlink->resource_list;
+		resource_list = resource_list_head;
 	} else {
 		struct devlink_resource *parent_resource;
 
-		parent_resource = devlink_resource_find(devlink, NULL,
-							parent_resource_id);
+		parent_resource = __devlink_resource_find(resource_list_head,
+							  NULL,
+							  parent_resource_id);
 		if (parent_resource) {
 			resource_list = &parent_resource->resource_list;
 			resource->parent = parent_resource;
@@ -372,23 +370,64 @@ int devl_resource_register(struct devlink *devlink,
 	resource->size_new = resource_size;
 	resource->id = resource_id;
 	resource->size_valid = true;
-	memcpy(&resource->size_params, size_params,
-	       sizeof(resource->size_params));
+	memcpy(&resource->size_params, params, sizeof(resource->size_params));
 	INIT_LIST_HEAD(&resource->resource_list);
 	list_add_tail(&resource->list, resource_list);
 
 	return 0;
 }
+
+/**
+ * devl_resource_register - devlink resource register
+ *
+ * @devlink: devlink
+ * @resource_name: resource's name
+ * @resource_size: resource's size
+ * @resource_id: resource's id
+ * @parent_resource_id: resource's parent id
+ * @params: size parameters
+ *
+ * Generic resources should reuse the same names across drivers.
+ * Please see the generic resources list at:
+ * Documentation/networking/devlink/devlink-resource.rst
+ *
+ * Return: 0 on success, negative error code otherwise.
+ */
+int devl_resource_register(struct devlink *devlink, const char *resource_name,
+			   u64 resource_size, u64 resource_id,
+			   u64 parent_resource_id,
+			   const struct devlink_resource_size_params *params)
+{
+	return __devl_resource_register(devlink, &devlink->resource_list,
+					resource_name, resource_size,
+					resource_id, parent_resource_id,
+					params);
+}
 EXPORT_SYMBOL_GPL(devl_resource_register);
 
-static void devlink_resource_unregister(struct devlink *devlink,
-					struct devlink_resource *resource)
+static void devlink_resource_unregister(struct devlink_resource *resource)
 {
 	struct devlink_resource *tmp, *child_resource;
 
 	list_for_each_entry_safe(child_resource, tmp, &resource->resource_list,
 				 list) {
-		devlink_resource_unregister(devlink, child_resource);
+		devlink_resource_unregister(child_resource);
+		list_del(&child_resource->list);
+		kfree(child_resource);
+	}
+}
+
+static void
+__devl_resources_unregister(struct devlink *devlink,
+			    struct list_head *resource_list_head)
+{
+	struct devlink_resource *tmp, *child_resource;
+
+	lockdep_assert_held(&devlink->lock);
+
+	list_for_each_entry_safe(child_resource, tmp, resource_list_head,
+				 list) {
+		devlink_resource_unregister(child_resource);
 		list_del(&child_resource->list);
 		kfree(child_resource);
 	}
@@ -401,16 +440,7 @@ static void devlink_resource_unregister(struct devlink *devlink,
  */
 void devl_resources_unregister(struct devlink *devlink)
 {
-	struct devlink_resource *tmp, *child_resource;
-
-	lockdep_assert_held(&devlink->lock);
-
-	list_for_each_entry_safe(child_resource, tmp, &devlink->resource_list,
-				 list) {
-		devlink_resource_unregister(devlink, child_resource);
-		list_del(&child_resource->list);
-		kfree(child_resource);
-	}
+	__devl_resources_unregister(devlink, &devlink->resource_list);
 }
 EXPORT_SYMBOL_GPL(devl_resources_unregister);
 

From 6f38acfed5edb398201d9ff127919745cbb331a1 Mon Sep 17 00:00:00 2001
From: Or Har-Toov <ohartoov@nvidia.com>
Date: Tue, 7 Apr 2026 22:40:57 +0300
Subject: [PATCH 02/12] devlink: Add port-level resource registration
 infrastructure

The current devlink resource infrastructure supports only device-level
resources. Some hardware resources are associated with specific ports
rather than the entire device, and today we have no way to show resource
per-port.

Add support for registering resources at the port level.

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>
Link: https://patch.msgid.link/20260407194107.148063-3-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 include/net/devlink.h  |  8 ++++++++
 net/devlink/port.c     |  2 ++
 net/devlink/resource.c | 43 ++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 53 insertions(+)

diff --git a/include/net/devlink.h b/include/net/devlink.h
index f5439d050eb0..bcd31de1f890 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -129,6 +129,7 @@ struct devlink_rate {
 struct devlink_port {
 	struct list_head list;
 	struct list_head region_list;
+	struct list_head resource_list;
 	struct devlink *devlink;
 	const struct devlink_port_ops *ops;
 	unsigned int index;
@@ -1891,6 +1892,13 @@ void devlink_resources_unregister(struct devlink *devlink);
 int devl_resource_size_get(struct devlink *devlink,
 			   u64 resource_id,
 			   u64 *p_resource_size);
+int
+devl_port_resource_register(struct devlink_port *devlink_port,
+			    const char *resource_name,
+			    u64 resource_size, u64 resource_id,
+			    u64 parent_resource_id,
+			    const struct devlink_resource_size_params *params);
+void devl_port_resources_unregister(struct devlink_port *devlink_port);
 int devl_dpipe_table_resource_set(struct devlink *devlink,
 				  const char *table_name, u64 resource_id,
 				  u64 resource_units);
diff --git a/net/devlink/port.c b/net/devlink/port.c
index 7fcd1d3ed44c..485029d43428 100644
--- a/net/devlink/port.c
+++ b/net/devlink/port.c
@@ -1025,6 +1025,7 @@ void devlink_port_init(struct devlink *devlink,
 		return;
 	devlink_port->devlink = devlink;
 	INIT_LIST_HEAD(&devlink_port->region_list);
+	INIT_LIST_HEAD(&devlink_port->resource_list);
 	devlink_port->initialized = true;
 }
 EXPORT_SYMBOL_GPL(devlink_port_init);
@@ -1042,6 +1043,7 @@ EXPORT_SYMBOL_GPL(devlink_port_init);
 void devlink_port_fini(struct devlink_port *devlink_port)
 {
 	WARN_ON(!list_empty(&devlink_port->region_list));
+	WARN_ON(!list_empty(&devlink_port->resource_list));
 }
 EXPORT_SYMBOL_GPL(devlink_port_fini);
 
diff --git a/net/devlink/resource.c b/net/devlink/resource.c
index ee169a467d48..f3014ec425c4 100644
--- a/net/devlink/resource.c
+++ b/net/devlink/resource.c
@@ -532,3 +532,46 @@ void devl_resource_occ_get_unregister(struct devlink *devlink,
 	resource->occ_get_priv = NULL;
 }
 EXPORT_SYMBOL_GPL(devl_resource_occ_get_unregister);
+
+/**
+ * devl_port_resource_register - devlink port resource register
+ *
+ * @devlink_port: devlink port
+ * @resource_name: resource's name
+ * @resource_size: resource's size
+ * @resource_id: resource's id
+ * @parent_resource_id: resource's parent id
+ * @params: size parameters
+ *
+ * Generic resources should reuse the same names across drivers.
+ * Please see the generic resources list at:
+ * Documentation/networking/devlink/devlink-resource.rst
+ *
+ * Return: 0 on success, negative error code otherwise.
+ */
+int
+devl_port_resource_register(struct devlink_port *devlink_port,
+			    const char *resource_name,
+			    u64 resource_size, u64 resource_id,
+			    u64 parent_resource_id,
+			    const struct devlink_resource_size_params *params)
+{
+	return __devl_resource_register(devlink_port->devlink,
+					&devlink_port->resource_list,
+					resource_name, resource_size,
+					resource_id, parent_resource_id,
+					params);
+}
+EXPORT_SYMBOL_GPL(devl_port_resource_register);
+
+/**
+ * devl_port_resources_unregister - unregister all devlink port resources
+ *
+ * @devlink_port: devlink port
+ */
+void devl_port_resources_unregister(struct devlink_port *devlink_port)
+{
+	__devl_resources_unregister(devlink_port->devlink,
+				    &devlink_port->resource_list);
+}
+EXPORT_SYMBOL_GPL(devl_port_resources_unregister);

From 4be8326d817e6d47f8446938408bb2001b799340 Mon Sep 17 00:00:00 2001
From: Or Har-Toov <ohartoov@nvidia.com>
Date: Tue, 7 Apr 2026 22:40:58 +0300
Subject: [PATCH 03/12] net/mlx5: Register SF resource on PF port representor

The device-level "resource show" displays max_local_SFs and
max_external_SFs without indicating which port each resource belongs
to. Users cannot determine the controller number and pfnum associated
with each SF pool.

Register max_SFs resource on the host PF representor port to expose
per-port SF limits. Users can correlate the port resource with the
controller number and pfnum shown in 'devlink port show'.

Future patches will introduce an ECPF that manages multiple PFs,
where each PF has its own SF pool.

Example usage:

  $ devlink resource show pci/0000:03:00.0/196608
  pci/0000:03:00.0/196608:
    name max_SFs size 20 unit entry

  $ devlink port show pci/0000:03:00.0/196608
  pci/0000:03:00.0/196608: type eth netdev pf0hpf flavour pcipf
    controller 1 pfnum 0 external true splittable false
    function:
      hw_addr b8:3f:d2:e1:8f:dc roce enable max_io_eqs 120

We can create up to 20 SFs over devlink port pci/0000:03:00.0/196608,
with pfnum 0 and controller 1.

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>
Link: https://patch.msgid.link/20260407194107.148063-4-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 .../net/ethernet/mellanox/mlx5/core/devlink.h |  4 ++
 .../mellanox/mlx5/core/esw/devlink_port.c     | 37 +++++++++++++++++++
 2 files changed, 41 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/devlink.h b/drivers/net/ethernet/mellanox/mlx5/core/devlink.h
index 43b9bf8829cf..4fbb3926a3e5 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/devlink.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/devlink.h
@@ -14,6 +14,10 @@ enum mlx5_devlink_resource_id {
 	MLX5_ID_RES_MAX = __MLX5_ID_RES_MAX - 1,
 };
 
+enum mlx5_devlink_port_resource_id {
+	MLX5_DL_PORT_RES_MAX_SFS = 1,
+};
+
 enum mlx5_devlink_param_id {
 	MLX5_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX,
 	MLX5_DEVLINK_PARAM_ID_FLOW_STEERING_MODE,
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/esw/devlink_port.c b/drivers/net/ethernet/mellanox/mlx5/core/esw/devlink_port.c
index 8bffba85f21f..e1d11326af1b 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/esw/devlink_port.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/esw/devlink_port.c
@@ -3,6 +3,7 @@
 
 #include <linux/mlx5/driver.h>
 #include "eswitch.h"
+#include "devlink.h"
 
 static void
 mlx5_esw_get_port_parent_id(struct mlx5_core_dev *dev, struct netdev_phys_item_id *ppid)
@@ -158,6 +159,32 @@ static const struct devlink_port_ops mlx5_esw_dl_sf_port_ops = {
 	.port_fn_max_io_eqs_set = mlx5_devlink_port_fn_max_io_eqs_set,
 };
 
+static int mlx5_esw_devlink_port_res_register(struct mlx5_eswitch *esw,
+					      struct devlink_port *dl_port)
+{
+	struct devlink_resource_size_params size_params;
+	struct mlx5_core_dev *dev = esw->dev;
+	u16 max_sfs, sf_base_id;
+	int err;
+
+	err = mlx5_esw_sf_max_hpf_functions(dev, &max_sfs, &sf_base_id);
+	if (err)
+		return err;
+
+	devlink_resource_size_params_init(&size_params, max_sfs, max_sfs, 1,
+					  DEVLINK_RESOURCE_UNIT_ENTRY);
+
+	return devl_port_resource_register(dl_port, "max_SFs", max_sfs,
+					   MLX5_DL_PORT_RES_MAX_SFS,
+					   DEVLINK_RESOURCE_ID_PARENT_TOP,
+					   &size_params);
+}
+
+static void mlx5_esw_devlink_port_res_unregister(struct devlink_port *dl_port)
+{
+	devl_port_resources_unregister(dl_port);
+}
+
 int mlx5_esw_offloads_devlink_port_register(struct mlx5_eswitch *esw, struct mlx5_vport *vport)
 {
 	struct mlx5_core_dev *dev = esw->dev;
@@ -189,6 +216,15 @@ int mlx5_esw_offloads_devlink_port_register(struct mlx5_eswitch *esw, struct mlx
 	if (err)
 		goto rate_err;
 
+	if (vport_num == MLX5_VPORT_PF) {
+		err = mlx5_esw_devlink_port_res_register(esw,
+							 &dl_port->dl_port);
+		if (err)
+			mlx5_core_dbg(dev,
+				      "Failed to register port resources: %d\n",
+				       err);
+	}
+
 	return 0;
 
 rate_err:
@@ -203,6 +239,7 @@ void mlx5_esw_offloads_devlink_port_unregister(struct mlx5_vport *vport)
 	if (!vport->dl_port)
 		return;
 	dl_port = vport->dl_port;
+	mlx5_esw_devlink_port_res_unregister(&dl_port->dl_port);
 
 	mlx5_esw_qos_vport_update_parent(vport, NULL, NULL);
 	devl_rate_leaf_destroy(&dl_port->dl_port);

From 085b234b28ccf13af96c2465d4b82c3bc46a7885 Mon Sep 17 00:00:00 2001
From: Or Har-Toov <ohartoov@nvidia.com>
Date: Tue, 7 Apr 2026 22:40:59 +0300
Subject: [PATCH 04/12] netdevsim: Add devlink port resource registration

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>
Link: https://patch.msgid.link/20260407194107.148063-5-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 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;

From 11636b550eea9e480fe4ceec8ab7bd8f24b363da Mon Sep 17 00:00:00 2001
From: Or Har-Toov <ohartoov@nvidia.com>
Date: Tue, 7 Apr 2026 22:41:00 +0300
Subject: [PATCH 05/12] devlink: Add dump support for device-level resources

Add dumpit handler for resource-dump command to iterate over all devlink
devices and show their resources.

  $ devlink resource show
  pci/0000:08:00.0:
    name local_max_SFs size 508 unit entry
    name external_max_SFs size 508 unit entry
  pci/0000:08:00.1:
    name local_max_SFs size 508 unit entry
    name external_max_SFs size 508 unit entry

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>
Link: https://patch.msgid.link/20260407194107.148063-6-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 Documentation/netlink/specs/devlink.yaml |  6 +-
 net/devlink/netlink_gen.c                | 20 +++++-
 net/devlink/netlink_gen.h                |  4 +-
 net/devlink/resource.c                   | 77 ++++++++++++++++++++++++
 4 files changed, 102 insertions(+), 5 deletions(-)

diff --git a/Documentation/netlink/specs/devlink.yaml b/Documentation/netlink/specs/devlink.yaml
index b495d56b9137..c423e049c7bd 100644
--- a/Documentation/netlink/specs/devlink.yaml
+++ b/Documentation/netlink/specs/devlink.yaml
@@ -1764,13 +1764,17 @@ operations:
             - bus-name
             - dev-name
             - index
-        reply:
+        reply: &resource-dump-reply
           value: 36
           attributes:
             - bus-name
             - dev-name
             - index
             - resource-list
+      dump:
+        request:
+          attributes: *dev-id-attrs
+        reply: *resource-dump-reply
 
     -
       name: reload
diff --git a/net/devlink/netlink_gen.c b/net/devlink/netlink_gen.c
index eb35e80e01d1..a5a47a4c6de8 100644
--- a/net/devlink/netlink_gen.c
+++ b/net/devlink/netlink_gen.c
@@ -305,7 +305,14 @@ static const struct nla_policy devlink_resource_set_nl_policy[DEVLINK_ATTR_INDEX
 };
 
 /* DEVLINK_CMD_RESOURCE_DUMP - do */
-static const struct nla_policy devlink_resource_dump_nl_policy[DEVLINK_ATTR_INDEX + 1] = {
+static const struct nla_policy devlink_resource_dump_do_nl_policy[DEVLINK_ATTR_INDEX + 1] = {
+	[DEVLINK_ATTR_BUS_NAME] = { .type = NLA_NUL_STRING, },
+	[DEVLINK_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING, },
+	[DEVLINK_ATTR_INDEX] = NLA_POLICY_FULL_RANGE(NLA_UINT, &devlink_attr_index_range),
+};
+
+/* DEVLINK_CMD_RESOURCE_DUMP - dump */
+static const struct nla_policy devlink_resource_dump_dump_nl_policy[DEVLINK_ATTR_INDEX + 1] = {
 	[DEVLINK_ATTR_BUS_NAME] = { .type = NLA_NUL_STRING, },
 	[DEVLINK_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING, },
 	[DEVLINK_ATTR_INDEX] = NLA_POLICY_FULL_RANGE(NLA_UINT, &devlink_attr_index_range),
@@ -680,7 +687,7 @@ static const struct nla_policy devlink_notify_filter_set_nl_policy[DEVLINK_ATTR_
 };
 
 /* Ops table for devlink */
-const struct genl_split_ops devlink_nl_ops[74] = {
+const struct genl_split_ops devlink_nl_ops[75] = {
 	{
 		.cmd		= DEVLINK_CMD_GET,
 		.validate	= GENL_DONT_VALIDATE_STRICT,
@@ -958,10 +965,17 @@ const struct genl_split_ops devlink_nl_ops[74] = {
 		.pre_doit	= devlink_nl_pre_doit,
 		.doit		= devlink_nl_resource_dump_doit,
 		.post_doit	= devlink_nl_post_doit,
-		.policy		= devlink_resource_dump_nl_policy,
+		.policy		= devlink_resource_dump_do_nl_policy,
 		.maxattr	= DEVLINK_ATTR_INDEX,
 		.flags		= GENL_CMD_CAP_DO,
 	},
+	{
+		.cmd		= DEVLINK_CMD_RESOURCE_DUMP,
+		.dumpit		= devlink_nl_resource_dump_dumpit,
+		.policy		= devlink_resource_dump_dump_nl_policy,
+		.maxattr	= DEVLINK_ATTR_INDEX,
+		.flags		= GENL_CMD_CAP_DUMP,
+	},
 	{
 		.cmd		= DEVLINK_CMD_RELOAD,
 		.validate	= GENL_DONT_VALIDATE_STRICT,
diff --git a/net/devlink/netlink_gen.h b/net/devlink/netlink_gen.h
index 2817d53a0eba..d79f6a0888f6 100644
--- a/net/devlink/netlink_gen.h
+++ b/net/devlink/netlink_gen.h
@@ -18,7 +18,7 @@ extern const struct nla_policy devlink_dl_rate_tc_bws_nl_policy[DEVLINK_RATE_TC_
 extern const struct nla_policy devlink_dl_selftest_id_nl_policy[DEVLINK_ATTR_SELFTEST_ID_FLASH + 1];
 
 /* Ops table for devlink */
-extern const struct genl_split_ops devlink_nl_ops[74];
+extern const struct genl_split_ops devlink_nl_ops[75];
 
 int devlink_nl_pre_doit(const struct genl_split_ops *ops, struct sk_buff *skb,
 			struct genl_info *info);
@@ -80,6 +80,8 @@ int devlink_nl_dpipe_table_counters_set_doit(struct sk_buff *skb,
 					     struct genl_info *info);
 int devlink_nl_resource_set_doit(struct sk_buff *skb, struct genl_info *info);
 int devlink_nl_resource_dump_doit(struct sk_buff *skb, struct genl_info *info);
+int devlink_nl_resource_dump_dumpit(struct sk_buff *skb,
+				    struct netlink_callback *cb);
 int devlink_nl_reload_doit(struct sk_buff *skb, struct genl_info *info);
 int devlink_nl_param_get_doit(struct sk_buff *skb, struct genl_info *info);
 int devlink_nl_param_get_dumpit(struct sk_buff *skb,
diff --git a/net/devlink/resource.c b/net/devlink/resource.c
index f3014ec425c4..02fb36e25c52 100644
--- a/net/devlink/resource.c
+++ b/net/devlink/resource.c
@@ -223,6 +223,31 @@ static int devlink_resource_put(struct devlink *devlink, struct sk_buff *skb,
 	return -EMSGSIZE;
 }
 
+static int devlink_resource_list_fill(struct sk_buff *skb,
+				      struct devlink *devlink,
+				      struct list_head *resource_list_head,
+				      int *idx)
+{
+	struct devlink_resource *resource;
+	int i = 0;
+	int err;
+
+	list_for_each_entry(resource, resource_list_head, list) {
+		if (i < *idx) {
+			i++;
+			continue;
+		}
+		err = devlink_resource_put(devlink, skb, resource);
+		if (err) {
+			*idx = i;
+			return err;
+		}
+		i++;
+	}
+	*idx = 0;
+	return 0;
+}
+
 static int devlink_resource_fill(struct genl_info *info,
 				 enum devlink_command cmd, int flags)
 {
@@ -302,6 +327,58 @@ int devlink_nl_resource_dump_doit(struct sk_buff *skb, struct genl_info *info)
 	return devlink_resource_fill(info, DEVLINK_CMD_RESOURCE_DUMP, 0);
 }
 
+static int
+devlink_nl_resource_dump_one(struct sk_buff *skb, struct devlink *devlink,
+			     struct netlink_callback *cb, int flags)
+{
+	struct devlink_nl_dump_state *state = devlink_dump_state(cb);
+	struct nlattr *resources_attr;
+	int start_idx = state->idx;
+	void *hdr;
+	int err;
+
+	if (list_empty(&devlink->resource_list))
+		return 0;
+
+	err = -EMSGSIZE;
+	hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
+			  &devlink_nl_family, flags, DEVLINK_CMD_RESOURCE_DUMP);
+	if (!hdr)
+		return err;
+
+	if (devlink_nl_put_handle(skb, devlink))
+		goto nla_put_failure;
+
+	resources_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_RESOURCE_LIST);
+	if (!resources_attr)
+		goto nla_put_failure;
+
+	err = devlink_resource_list_fill(skb, devlink,
+					 &devlink->resource_list, &state->idx);
+	if (err) {
+		if (state->idx == start_idx)
+			goto resource_list_cancel;
+		nla_nest_end(skb, resources_attr);
+		genlmsg_end(skb, hdr);
+		return err;
+	}
+	nla_nest_end(skb, resources_attr);
+	genlmsg_end(skb, hdr);
+	return 0;
+
+resource_list_cancel:
+	nla_nest_cancel(skb, resources_attr);
+nla_put_failure:
+	genlmsg_cancel(skb, hdr);
+	return err;
+}
+
+int devlink_nl_resource_dump_dumpit(struct sk_buff *skb,
+				    struct netlink_callback *cb)
+{
+	return devlink_nl_dumpit(skb, cb, devlink_nl_resource_dump_one);
+}
+
 int devlink_resources_validate(struct devlink *devlink,
 			       struct devlink_resource *resource,
 			       struct genl_info *info)

From 810b76394d69f340c0060260f7167639352b7217 Mon Sep 17 00:00:00 2001
From: Or Har-Toov <ohartoov@nvidia.com>
Date: Tue, 7 Apr 2026 22:41:01 +0300
Subject: [PATCH 06/12] devlink: Include port resources in resource dump dumpit

Allow querying devlink resources per-port via the resource-dump dumpit
handler. Both device-level and all ports resources are included in the
reply.

For example:

$ devlink resource show
pci/0000:03:00.0:
  name local_max_SFs size 508 unit entry
  name external_max_SFs size 508 unit entry
pci/0000:03:00.0/196608:
  name max_SFs size 20 unit entry
pci/0000:03:00.1:
  name local_max_SFs size 508 unit entry
  name external_max_SFs size 508 unit entry
pci/0000:03:00.1/262144:
  name max_SFs size 20 unit entry

Signed-off-by: Or Har-Toov <ohartoov@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/20260407194107.148063-7-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 net/devlink/devl_internal.h |  5 ++++
 net/devlink/netlink.c       |  2 ++
 net/devlink/resource.c      | 59 ++++++++++++++++++++++++++++++++-----
 3 files changed, 58 insertions(+), 8 deletions(-)

diff --git a/net/devlink/devl_internal.h b/net/devlink/devl_internal.h
index 7dfb7cdd2d23..e4e48ee2da5a 100644
--- a/net/devlink/devl_internal.h
+++ b/net/devlink/devl_internal.h
@@ -164,6 +164,11 @@ struct devlink_nl_dump_state {
 		struct {
 			u64 dump_ts;
 		};
+		/* DEVLINK_CMD_RESOURCE_DUMP */
+		struct {
+			u32 index;
+			bool index_valid;
+		} port_ctx;
 	};
 };
 
diff --git a/net/devlink/netlink.c b/net/devlink/netlink.c
index 32ddbe244cb7..ae4afc739678 100644
--- a/net/devlink/netlink.c
+++ b/net/devlink/netlink.c
@@ -370,6 +370,8 @@ static int devlink_nl_inst_iter_dumpit(struct sk_buff *msg,
 
 		/* restart sub-object walk for the next instance */
 		state->idx = 0;
+		state->port_ctx.index = 0;
+		state->port_ctx.index_valid = false;
 	}
 
 	if (err != -EMSGSIZE)
diff --git a/net/devlink/resource.c b/net/devlink/resource.c
index 02fb36e25c52..7984eda63eb6 100644
--- a/net/devlink/resource.c
+++ b/net/devlink/resource.c
@@ -328,16 +328,20 @@ int devlink_nl_resource_dump_doit(struct sk_buff *skb, struct genl_info *info)
 }
 
 static int
-devlink_nl_resource_dump_one(struct sk_buff *skb, struct devlink *devlink,
-			     struct netlink_callback *cb, int flags)
+devlink_resource_dump_fill_one(struct sk_buff *skb, struct devlink *devlink,
+			       struct devlink_port *devlink_port,
+			       struct netlink_callback *cb, int flags, int *idx)
 {
-	struct devlink_nl_dump_state *state = devlink_dump_state(cb);
+	struct list_head *resource_list;
 	struct nlattr *resources_attr;
-	int start_idx = state->idx;
+	int start_idx = *idx;
 	void *hdr;
 	int err;
 
-	if (list_empty(&devlink->resource_list))
+	resource_list = devlink_port ?
+		&devlink_port->resource_list : &devlink->resource_list;
+
+	if (list_empty(resource_list))
 		return 0;
 
 	err = -EMSGSIZE;
@@ -348,15 +352,17 @@ devlink_nl_resource_dump_one(struct sk_buff *skb, struct devlink *devlink,
 
 	if (devlink_nl_put_handle(skb, devlink))
 		goto nla_put_failure;
+	if (devlink_port &&
+	    nla_put_u32(skb, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
+		goto nla_put_failure;
 
 	resources_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_RESOURCE_LIST);
 	if (!resources_attr)
 		goto nla_put_failure;
 
-	err = devlink_resource_list_fill(skb, devlink,
-					 &devlink->resource_list, &state->idx);
+	err = devlink_resource_list_fill(skb, devlink, resource_list, idx);
 	if (err) {
-		if (state->idx == start_idx)
+		if (*idx == start_idx)
 			goto resource_list_cancel;
 		nla_nest_end(skb, resources_attr);
 		genlmsg_end(skb, hdr);
@@ -373,6 +379,43 @@ devlink_nl_resource_dump_one(struct sk_buff *skb, struct devlink *devlink,
 	return err;
 }
 
+static int
+devlink_nl_resource_dump_one(struct sk_buff *skb, struct devlink *devlink,
+			     struct netlink_callback *cb, int flags)
+{
+	struct devlink_nl_dump_state *state = devlink_dump_state(cb);
+	struct devlink_port *devlink_port;
+	unsigned long port_idx;
+	int err;
+
+	if (!state->port_ctx.index_valid) {
+		err = devlink_resource_dump_fill_one(skb, devlink, NULL,
+						     cb, flags, &state->idx);
+		if (err)
+			return err;
+		state->idx = 0;
+	}
+
+	/* Check in case port was removed between dump callbacks. */
+	if (state->port_ctx.index_valid &&
+	    !xa_load(&devlink->ports, state->port_ctx.index))
+		state->idx = 0;
+	state->port_ctx.index_valid = true;
+	xa_for_each_start(&devlink->ports, port_idx, devlink_port,
+			  state->port_ctx.index) {
+		err = devlink_resource_dump_fill_one(skb, devlink, devlink_port,
+						     cb, flags, &state->idx);
+		if (err) {
+			state->port_ctx.index = port_idx;
+			return err;
+		}
+		state->idx = 0;
+	}
+	state->port_ctx.index_valid = false;
+	state->port_ctx.index = 0;
+	return 0;
+}
+
 int devlink_nl_resource_dump_dumpit(struct sk_buff *skb,
 				    struct netlink_callback *cb)
 {

From 7511ff14f30d264691ec493b09111404aed4aaf4 Mon Sep 17 00:00:00 2001
From: Or Har-Toov <ohartoov@nvidia.com>
Date: Tue, 7 Apr 2026 22:41:02 +0300
Subject: [PATCH 07/12] devlink: Add port-specific option to resource dump doit

Allow querying devlink resources per-port via the resource-dump doit
handler. When a port-index attribute is provided, only that port's
resources are returned. When no port-index is given, only device-level
resources are returned, preserving backward compatibility.

Signed-off-by: Or Har-Toov <ohartoov@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/20260407194107.148063-8-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 Documentation/netlink/specs/devlink.yaml |  4 +++-
 net/devlink/netlink_gen.c                |  3 ++-
 net/devlink/netlink_gen.h                |  4 ++--
 net/devlink/resource.c                   | 20 +++++++++++++++++---
 4 files changed, 24 insertions(+), 7 deletions(-)

diff --git a/Documentation/netlink/specs/devlink.yaml b/Documentation/netlink/specs/devlink.yaml
index c423e049c7bd..34aa81ba689e 100644
--- a/Documentation/netlink/specs/devlink.yaml
+++ b/Documentation/netlink/specs/devlink.yaml
@@ -1757,19 +1757,21 @@ operations:
       attribute-set: devlink
       dont-validate: [strict]
       do:
-        pre: devlink-nl-pre-doit
+        pre: devlink-nl-pre-doit-port-optional
         post: devlink-nl-post-doit
         request:
           attributes:
             - bus-name
             - dev-name
             - index
+            - port-index
         reply: &resource-dump-reply
           value: 36
           attributes:
             - bus-name
             - dev-name
             - index
+            - port-index
             - resource-list
       dump:
         request:
diff --git a/net/devlink/netlink_gen.c b/net/devlink/netlink_gen.c
index a5a47a4c6de8..9cc372d9ee41 100644
--- a/net/devlink/netlink_gen.c
+++ b/net/devlink/netlink_gen.c
@@ -309,6 +309,7 @@ static const struct nla_policy devlink_resource_dump_do_nl_policy[DEVLINK_ATTR_I
 	[DEVLINK_ATTR_BUS_NAME] = { .type = NLA_NUL_STRING, },
 	[DEVLINK_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING, },
 	[DEVLINK_ATTR_INDEX] = NLA_POLICY_FULL_RANGE(NLA_UINT, &devlink_attr_index_range),
+	[DEVLINK_ATTR_PORT_INDEX] = { .type = NLA_U32, },
 };
 
 /* DEVLINK_CMD_RESOURCE_DUMP - dump */
@@ -962,7 +963,7 @@ const struct genl_split_ops devlink_nl_ops[75] = {
 	{
 		.cmd		= DEVLINK_CMD_RESOURCE_DUMP,
 		.validate	= GENL_DONT_VALIDATE_STRICT,
-		.pre_doit	= devlink_nl_pre_doit,
+		.pre_doit	= devlink_nl_pre_doit_port_optional,
 		.doit		= devlink_nl_resource_dump_doit,
 		.post_doit	= devlink_nl_post_doit,
 		.policy		= devlink_resource_dump_do_nl_policy,
diff --git a/net/devlink/netlink_gen.h b/net/devlink/netlink_gen.h
index d79f6a0888f6..20034b0929a8 100644
--- a/net/devlink/netlink_gen.h
+++ b/net/devlink/netlink_gen.h
@@ -24,11 +24,11 @@ int devlink_nl_pre_doit(const struct genl_split_ops *ops, struct sk_buff *skb,
 			struct genl_info *info);
 int devlink_nl_pre_doit_port(const struct genl_split_ops *ops,
 			     struct sk_buff *skb, struct genl_info *info);
-int devlink_nl_pre_doit_dev_lock(const struct genl_split_ops *ops,
-				 struct sk_buff *skb, struct genl_info *info);
 int devlink_nl_pre_doit_port_optional(const struct genl_split_ops *ops,
 				      struct sk_buff *skb,
 				      struct genl_info *info);
+int devlink_nl_pre_doit_dev_lock(const struct genl_split_ops *ops,
+				 struct sk_buff *skb, struct genl_info *info);
 void
 devlink_nl_post_doit(const struct genl_split_ops *ops, struct sk_buff *skb,
 		     struct genl_info *info);
diff --git a/net/devlink/resource.c b/net/devlink/resource.c
index 7984eda63eb6..bf5221fb3e64 100644
--- a/net/devlink/resource.c
+++ b/net/devlink/resource.c
@@ -251,8 +251,10 @@ static int devlink_resource_list_fill(struct sk_buff *skb,
 static int devlink_resource_fill(struct genl_info *info,
 				 enum devlink_command cmd, int flags)
 {
+	struct devlink_port *devlink_port = info->user_ptr[1];
 	struct devlink *devlink = info->user_ptr[0];
 	struct devlink_resource *resource;
+	struct list_head *resource_list;
 	struct nlattr *resources_attr;
 	struct sk_buff *skb = NULL;
 	struct nlmsghdr *nlh;
@@ -261,7 +263,9 @@ static int devlink_resource_fill(struct genl_info *info,
 	int i;
 	int err;
 
-	resource = list_first_entry(&devlink->resource_list,
+	resource_list = devlink_port ?
+		&devlink_port->resource_list : &devlink->resource_list;
+	resource = list_first_entry(resource_list,
 				    struct devlink_resource, list);
 start_again:
 	err = devlink_nl_msg_reply_and_new(&skb, info);
@@ -277,6 +281,9 @@ static int devlink_resource_fill(struct genl_info *info,
 
 	if (devlink_nl_put_handle(skb, devlink))
 		goto nla_put_failure;
+	if (devlink_port &&
+	    nla_put_u32(skb, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
+		goto nla_put_failure;
 
 	resources_attr = nla_nest_start_noflag(skb,
 					       DEVLINK_ATTR_RESOURCE_LIST);
@@ -285,7 +292,7 @@ static int devlink_resource_fill(struct genl_info *info,
 
 	incomplete = false;
 	i = 0;
-	list_for_each_entry_from(resource, &devlink->resource_list, list) {
+	list_for_each_entry_from(resource, resource_list, list) {
 		err = devlink_resource_put(devlink, skb, resource);
 		if (err) {
 			if (!i)
@@ -319,9 +326,16 @@ static int devlink_resource_fill(struct genl_info *info,
 
 int devlink_nl_resource_dump_doit(struct sk_buff *skb, struct genl_info *info)
 {
+	struct devlink_port *devlink_port = info->user_ptr[1];
 	struct devlink *devlink = info->user_ptr[0];
+	struct list_head *resource_list;
 
-	if (list_empty(&devlink->resource_list))
+	if (info->attrs[DEVLINK_ATTR_PORT_INDEX] && !devlink_port)
+		return -ENODEV;
+
+	resource_list = devlink_port ?
+		&devlink_port->resource_list : &devlink->resource_list;
+	if (list_empty(resource_list))
 		return -EOPNOTSUPP;
 
 	return devlink_resource_fill(info, DEVLINK_CMD_RESOURCE_DUMP, 0);

From 3961353771041908cadfdf8b773bfcb19b281b1a Mon Sep 17 00:00:00 2001
From: Or Har-Toov <ohartoov@nvidia.com>
Date: Tue, 7 Apr 2026 22:41:03 +0300
Subject: [PATCH 08/12] selftest: netdevsim: Add devlink port resource doit
 test

Tests that querying a specific port handle returns the expected
resource name and size.

Signed-off-by: Or Har-Toov <ohartoov@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/20260407194107.148063-9-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 .../drivers/net/netdevsim/devlink.sh          | 29 ++++++++++++++++++-
 1 file changed, 28 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/drivers/net/netdevsim/devlink.sh b/tools/testing/selftests/drivers/net/netdevsim/devlink.sh
index 1b529ccaf050..31d1cef54898 100755
--- a/tools/testing/selftests/drivers/net/netdevsim/devlink.sh
+++ b/tools/testing/selftests/drivers/net/netdevsim/devlink.sh
@@ -5,7 +5,8 @@ lib_dir=$(dirname $0)/../../../net/forwarding
 
 ALL_TESTS="fw_flash_test params_test  \
 	   params_default_test regions_test reload_test \
-	   netns_reload_test resource_test dev_info_test \
+	   netns_reload_test resource_test \
+	   port_resource_doit_test dev_info_test \
 	   empty_reporter_test dummy_reporter_test rate_test"
 NUM_NETIFS=0
 source $lib_dir/lib.sh
@@ -768,6 +769,32 @@ rate_node_del()
 	devlink port function rate del $handle
 }
 
+port_resource_doit_test()
+{
+	RET=0
+
+	local port_handle="${DL_HANDLE}/0"
+	local name
+	local size
+
+	if ! devlink resource help 2>&1 | grep -q "PORT_INDEX"; then
+		echo "SKIP: devlink resource show with port not supported"
+		return
+	fi
+
+	name=$(cmd_jq "devlink resource show $port_handle -j" \
+		      '.[][][].name')
+	[ "$name" == "test_resource" ]
+	check_err $? "wrong port resource name (got $name)"
+
+	size=$(cmd_jq "devlink resource show $port_handle -j" \
+		      '.[][][].size')
+	[ "$size" == "20" ]
+	check_err $? "wrong port resource size (got $size)"
+
+	log_test "port resource doit test"
+}
+
 rate_test()
 {
 	RET=0

From 170e160a0e7c6396f74279d922bee90902bd16f6 Mon Sep 17 00:00:00 2001
From: Or Har-Toov <ohartoov@nvidia.com>
Date: Tue, 7 Apr 2026 22:41:04 +0300
Subject: [PATCH 09/12] devlink: Document port-level resources and full dump

Document the port-level resource support and the option to dump all
resources, including both device-level and port-level entries.

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>
Link: https://patch.msgid.link/20260407194107.148063-10-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 .../networking/devlink/devlink-resource.rst   | 35 +++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/Documentation/networking/devlink/devlink-resource.rst b/Documentation/networking/devlink/devlink-resource.rst
index 3d5ae51e65a2..9839c1661315 100644
--- a/Documentation/networking/devlink/devlink-resource.rst
+++ b/Documentation/networking/devlink/devlink-resource.rst
@@ -74,3 +74,38 @@ attribute, which represents the pending change in size. For example:
 
 Note that changes in resource size may require a device reload to properly
 take effect.
+
+Port-level Resources and Full Dump
+==================================
+
+In addition to device-level resources, ``devlink`` also supports port-level
+resources. These resources are associated with a specific devlink port rather
+than the device as a whole.
+
+To list resources for all devlink devices and ports:
+
+.. code:: shell
+
+    $ devlink resource show
+    pci/0000:03:00.0:
+      name max_local_SFs size 128 unit entry dpipe_tables none
+      name max_external_SFs size 128 unit entry dpipe_tables none
+    pci/0000:03:00.0/196608:
+      name max_SFs size 128 unit entry dpipe_tables none
+    pci/0000:03:00.0/196609:
+      name max_SFs size 128 unit entry dpipe_tables none
+    pci/0000:03:00.1:
+      name max_local_SFs size 128 unit entry dpipe_tables none
+      name max_external_SFs size 128 unit entry dpipe_tables none
+    pci/0000:03:00.1/196708:
+      name max_SFs size 128 unit entry dpipe_tables none
+    pci/0000:03:00.1/196709:
+      name max_SFs size 128 unit entry dpipe_tables none
+
+To show resources for a specific port:
+
+.. code:: shell
+
+    $ devlink resource show pci/0000:03:00.0/196608
+    pci/0000:03:00.0/196608:
+      name max_SFs size 128 unit entry dpipe_tables none

From 1bc45341a6ea4009ee9f2fbca9096b33a9ef71a2 Mon Sep 17 00:00:00 2001
From: Or Har-Toov <ohartoov@nvidia.com>
Date: Tue, 7 Apr 2026 22:41:05 +0300
Subject: [PATCH 10/12] devlink: Add resource scope filtering to resource dump

Allow filtering the resource dump to device-level or port-level
resources using the 'scope' option.

Example - dump only device-level resources:

  $ devlink resource show scope dev
  pci/0000:03:00.0:
    name max_local_SFs size 128 unit entry dpipe_tables none
    name max_external_SFs size 128 unit entry dpipe_tables none
  pci/0000:03:00.1:
    name max_local_SFs size 128 unit entry dpipe_tables none
    name max_external_SFs size 128 unit entry dpipe_tables none

Example - dump only port-level resources:

  $ devlink resource show scope port
  pci/0000:03:00.0/196608:
    name max_SFs size 128 unit entry dpipe_tables none
  pci/0000:03:00.0/196609:
    name max_SFs size 128 unit entry dpipe_tables none
  pci/0000:03:00.1/196708:
    name max_SFs size 128 unit entry dpipe_tables none
  pci/0000:03:00.1/196709:
    name max_SFs size 128 unit entry dpipe_tables none

Signed-off-by: Or Har-Toov <ohartoov@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/20260407194107.148063-11-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 Documentation/netlink/specs/devlink.yaml | 24 +++++++++++++++++++++++-
 include/uapi/linux/devlink.h             | 11 +++++++++++
 net/devlink/netlink_gen.c                |  5 +++--
 net/devlink/resource.c                   | 19 ++++++++++++++++++-
 4 files changed, 55 insertions(+), 4 deletions(-)

diff --git a/Documentation/netlink/specs/devlink.yaml b/Documentation/netlink/specs/devlink.yaml
index 34aa81ba689e..247b147d689f 100644
--- a/Documentation/netlink/specs/devlink.yaml
+++ b/Documentation/netlink/specs/devlink.yaml
@@ -157,6 +157,14 @@ definitions:
     entries:
       -
         name: entry
+  -
+    type: enum
+    name: resource-scope
+    entries:
+      -
+        name: dev
+      -
+        name: port
   -
     type: enum
     name: reload-action
@@ -873,6 +881,16 @@ attribute-sets:
         doc: Unique devlink instance index.
         checks:
           max: u32-max
+      -
+        name: resource-scope-mask
+        type: u32
+        enum: resource-scope
+        enum-as-flags: true
+        doc: |
+          Bitmask selecting which resource classes to include in a
+          resource-dump response. Bit 0 (dev) selects device-level
+          resources; bit 1 (port) selects port-level resources.
+          When absent all classes are returned.
   -
     name: dl-dev-stats
     subset-of: devlink
@@ -1775,7 +1793,11 @@ operations:
             - resource-list
       dump:
         request:
-          attributes: *dev-id-attrs
+          attributes:
+            - bus-name
+            - dev-name
+            - index
+            - resource-scope-mask
         reply: *resource-dump-reply
 
     -
diff --git a/include/uapi/linux/devlink.h b/include/uapi/linux/devlink.h
index 7de2d8cc862f..0b165eac7619 100644
--- a/include/uapi/linux/devlink.h
+++ b/include/uapi/linux/devlink.h
@@ -645,6 +645,7 @@ enum devlink_attr {
 	DEVLINK_ATTR_PARAM_RESET_DEFAULT,	/* flag */
 
 	DEVLINK_ATTR_INDEX,			/* uint */
+	DEVLINK_ATTR_RESOURCE_SCOPE_MASK,	/* u32 */
 
 	/* Add new attributes above here, update the spec in
 	 * Documentation/netlink/specs/devlink.yaml and re-generate
@@ -704,6 +705,16 @@ enum devlink_resource_unit {
 	DEVLINK_RESOURCE_UNIT_ENTRY,
 };
 
+enum devlink_resource_scope {
+	DEVLINK_RESOURCE_SCOPE_DEV_BIT,
+	DEVLINK_RESOURCE_SCOPE_PORT_BIT,
+};
+
+#define DEVLINK_RESOURCE_SCOPE_DEV \
+	_BITUL(DEVLINK_RESOURCE_SCOPE_DEV_BIT)
+#define DEVLINK_RESOURCE_SCOPE_PORT \
+	_BITUL(DEVLINK_RESOURCE_SCOPE_PORT_BIT)
+
 enum devlink_port_fn_attr_cap {
 	DEVLINK_PORT_FN_ATTR_CAP_ROCE_BIT,
 	DEVLINK_PORT_FN_ATTR_CAP_MIGRATABLE_BIT,
diff --git a/net/devlink/netlink_gen.c b/net/devlink/netlink_gen.c
index 9cc372d9ee41..81899786fd98 100644
--- a/net/devlink/netlink_gen.c
+++ b/net/devlink/netlink_gen.c
@@ -313,10 +313,11 @@ static const struct nla_policy devlink_resource_dump_do_nl_policy[DEVLINK_ATTR_I
 };
 
 /* DEVLINK_CMD_RESOURCE_DUMP - dump */
-static const struct nla_policy devlink_resource_dump_dump_nl_policy[DEVLINK_ATTR_INDEX + 1] = {
+static const struct nla_policy devlink_resource_dump_dump_nl_policy[DEVLINK_ATTR_RESOURCE_SCOPE_MASK + 1] = {
 	[DEVLINK_ATTR_BUS_NAME] = { .type = NLA_NUL_STRING, },
 	[DEVLINK_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING, },
 	[DEVLINK_ATTR_INDEX] = NLA_POLICY_FULL_RANGE(NLA_UINT, &devlink_attr_index_range),
+	[DEVLINK_ATTR_RESOURCE_SCOPE_MASK] = NLA_POLICY_MASK(NLA_U32, 0x3),
 };
 
 /* DEVLINK_CMD_RELOAD - do */
@@ -974,7 +975,7 @@ const struct genl_split_ops devlink_nl_ops[75] = {
 		.cmd		= DEVLINK_CMD_RESOURCE_DUMP,
 		.dumpit		= devlink_nl_resource_dump_dumpit,
 		.policy		= devlink_resource_dump_dump_nl_policy,
-		.maxattr	= DEVLINK_ATTR_INDEX,
+		.maxattr	= DEVLINK_ATTR_RESOURCE_SCOPE_MASK,
 		.flags		= GENL_CMD_CAP_DUMP,
 	},
 	{
diff --git a/net/devlink/resource.c b/net/devlink/resource.c
index bf5221fb3e64..3d2f42bc2fb5 100644
--- a/net/devlink/resource.c
+++ b/net/devlink/resource.c
@@ -398,11 +398,25 @@ devlink_nl_resource_dump_one(struct sk_buff *skb, struct devlink *devlink,
 			     struct netlink_callback *cb, int flags)
 {
 	struct devlink_nl_dump_state *state = devlink_dump_state(cb);
+	const struct genl_info *info = genl_info_dump(cb);
 	struct devlink_port *devlink_port;
+	struct nlattr *scope_attr = NULL;
 	unsigned long port_idx;
+	u32 scope = 0;
 	int err;
 
-	if (!state->port_ctx.index_valid) {
+	if (info->attrs && info->attrs[DEVLINK_ATTR_RESOURCE_SCOPE_MASK]) {
+		scope_attr = info->attrs[DEVLINK_ATTR_RESOURCE_SCOPE_MASK];
+		scope = nla_get_u32(scope_attr);
+		if (!scope) {
+			NL_SET_ERR_MSG_ATTR(info->extack, scope_attr,
+					    "empty resource scope selection");
+			return -EINVAL;
+		}
+	}
+
+	if (!state->port_ctx.index_valid &&
+	    (!scope || (scope & DEVLINK_RESOURCE_SCOPE_DEV))) {
 		err = devlink_resource_dump_fill_one(skb, devlink, NULL,
 						     cb, flags, &state->idx);
 		if (err)
@@ -410,6 +424,8 @@ devlink_nl_resource_dump_one(struct sk_buff *skb, struct devlink *devlink,
 		state->idx = 0;
 	}
 
+	if (scope && !(scope & DEVLINK_RESOURCE_SCOPE_PORT))
+		goto out;
 	/* Check in case port was removed between dump callbacks. */
 	if (state->port_ctx.index_valid &&
 	    !xa_load(&devlink->ports, state->port_ctx.index))
@@ -425,6 +441,7 @@ devlink_nl_resource_dump_one(struct sk_buff *skb, struct devlink *devlink,
 		}
 		state->idx = 0;
 	}
+out:
 	state->port_ctx.index_valid = false;
 	state->port_ctx.index = 0;
 	return 0;

From 2a8e91235254862aa1d99434c6105aec65cd8e42 Mon Sep 17 00:00:00 2001
From: Or Har-Toov <ohartoov@nvidia.com>
Date: Tue, 7 Apr 2026 22:41:06 +0300
Subject: [PATCH 11/12] selftest: netdevsim: Add resource dump and scope filter
 test

Add resource_dump_test() which verifies dumping resources for all
devices and ports, and tests that scope=dev returns only device-level
resources and scope=port returns only port resources.

Skip if userspace does not support the scope parameter.

Signed-off-by: Or Har-Toov <ohartoov@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/20260407194107.148063-12-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 .../drivers/net/netdevsim/devlink.sh          | 52 ++++++++++++++++++-
 1 file changed, 51 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/drivers/net/netdevsim/devlink.sh b/tools/testing/selftests/drivers/net/netdevsim/devlink.sh
index 31d1cef54898..22a626c6cde3 100755
--- a/tools/testing/selftests/drivers/net/netdevsim/devlink.sh
+++ b/tools/testing/selftests/drivers/net/netdevsim/devlink.sh
@@ -5,7 +5,7 @@ lib_dir=$(dirname $0)/../../../net/forwarding
 
 ALL_TESTS="fw_flash_test params_test  \
 	   params_default_test regions_test reload_test \
-	   netns_reload_test resource_test \
+	   netns_reload_test resource_test resource_dump_test \
 	   port_resource_doit_test dev_info_test \
 	   empty_reporter_test dummy_reporter_test rate_test"
 NUM_NETIFS=0
@@ -483,6 +483,56 @@ resource_test()
 	log_test "resource test"
 }
 
+resource_dump_test()
+{
+	RET=0
+
+	local port_jq
+	local dev_jq
+	local dl_jq
+	local count
+
+	dl_jq="with_entries(select(.key | startswith(\"$DL_HANDLE\")))"
+	port_jq="[.[] | $dl_jq | keys |"
+	port_jq+=" map(select(test(\"/.+/\"))) | length] | add"
+	dev_jq="[.[] | $dl_jq | keys |"
+	dev_jq+=" map(select(test(\"/.+/\")|not)) | length] | add"
+
+	if ! devlink resource help 2>&1 | grep -q "scope"; then
+		echo "SKIP: devlink resource show not supported"
+		return
+	fi
+
+	devlink resource show > /dev/null 2>&1
+	check_err $? "Failed to dump all resources"
+
+	count=$(cmd_jq "devlink resource show -j" "$port_jq")
+	[ "$count" -gt "0" ]
+	check_err $? "missing port resources in resource dump"
+
+	count=$(cmd_jq "devlink resource show -j" "$dev_jq")
+	[ "$count" -gt "0" ]
+	check_err $? "missing device resources in resource dump"
+
+	count=$(cmd_jq "devlink resource show scope dev -j" "$dev_jq")
+	[ "$count" -gt "0" ]
+	check_err $? "dev scope missing device resources"
+
+	count=$(cmd_jq "devlink resource show scope dev -j" "$port_jq")
+	[ "$count" -eq "0" ]
+	check_err $? "dev scope returned port resources"
+
+	count=$(cmd_jq "devlink resource show scope port -j" "$port_jq")
+	[ "$count" -gt "0" ]
+	check_err $? "port scope missing port resources"
+
+	count=$(cmd_jq "devlink resource show scope port -j" "$dev_jq")
+	[ "$count" -eq "0" ]
+	check_err $? "port scope returned device resources"
+
+	log_test "resource dump test"
+}
+
 info_get()
 {
 	local name=$1

From 78c327c1728de377020672d429250c80a8a13723 Mon Sep 17 00:00:00 2001
From: Or Har-Toov <ohartoov@nvidia.com>
Date: Tue, 7 Apr 2026 22:41:07 +0300
Subject: [PATCH 12/12] devlink: Document resource scope filtering

Document the scope parameter for devlink resource show, which allows
filtering the dump to device-level or port-level resources only.

Signed-off-by: Or Har-Toov <ohartoov@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/20260407194107.148063-13-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 .../networking/devlink/devlink-resource.rst   | 35 +++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/Documentation/networking/devlink/devlink-resource.rst b/Documentation/networking/devlink/devlink-resource.rst
index 9839c1661315..47eec8f875b4 100644
--- a/Documentation/networking/devlink/devlink-resource.rst
+++ b/Documentation/networking/devlink/devlink-resource.rst
@@ -109,3 +109,38 @@ To show resources for a specific port:
     $ devlink resource show pci/0000:03:00.0/196608
     pci/0000:03:00.0/196608:
       name max_SFs size 128 unit entry dpipe_tables none
+
+Resource Scope Filtering
+========================
+
+When dumping resources for all devices, ``devlink resource show`` accepts
+an optional ``scope`` parameter to restrict the response to device-level
+resources, port-level resources, or both (the default).
+
+To dump only device-level resources across all devices:
+
+.. code:: shell
+
+    $ devlink resource show scope dev
+    pci/0000:03:00.0:
+      name max_local_SFs size 128 unit entry dpipe_tables none
+      name max_external_SFs size 128 unit entry dpipe_tables none
+    pci/0000:03:00.1:
+      name max_local_SFs size 128 unit entry dpipe_tables none
+      name max_external_SFs size 128 unit entry dpipe_tables none
+
+To dump only port-level resources across all devices:
+
+.. code:: shell
+
+    $ devlink resource show scope port
+    pci/0000:03:00.0/196608:
+      name max_SFs size 128 unit entry dpipe_tables none
+    pci/0000:03:00.0/196609:
+      name max_SFs size 128 unit entry dpipe_tables none
+    pci/0000:03:00.1/196708:
+      name max_SFs size 128 unit entry dpipe_tables none
+    pci/0000:03:00.1/196709:
+      name max_SFs size 128 unit entry dpipe_tables none
+
+Note that port-level resources are read-only.