Merge branch 'devlink-add-per-port-resource-support'

Tariq Toukan says:

====================
devlink: add per-port resource support

This series by Or adds devlink per-port resource support:

Currently, devlink resources are only available at the device level.
However, some resources are inherently per-port, such as the maximum
number of subfunctions (SFs) that can be created on a specific PF port.
This limitation prevents user space from obtaining accurate per-port
capacity information.
This series adds infrastructure for per-port resources in devlink core
and implements it in the mlx5 driver to expose the max_SFs resource
on PF devlink ports.

Patch #1  refactors resource functions to be generic
Patch #2  adds port-level resource registration infrastructure
Patch #3  registers SF resource on PF port representor in mlx5
Patch #4  adds devlink port resource registration to netdevsim for testing
Patch #5  adds dump support for device-level resources
Patch #6  includes port resources in the resource dump dumpit path
Patch #7  adds port-specific option to resource dump doit path
Patch #8  adds selftest for devlink port resource doit
Patch #9  documents port-level resources and full dump
Patch #10 adds resource scope filtering to resource dump
Patch #11 adds selftest for resource dump and scope filter
Patch #12 documents resource scope filtering
====================

Link: https://patch.msgid.link/20260407194107.148063-1-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

2 files changed, 20 insertions, 1 deletions

diff --git a/include/net/devlink.h b/include/net/devlink.h
index 3038af6ec017..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;
@@ -1885,12 +1886,19 @@ 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,
 			   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/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,