mlxsw: spectrum_router: Expose RIF MAC profiles to devlink resource

Expose via devlink-resource the maximum number of RIF MAC profiles and
their current occupancy, so it can be used for debug and writing generic
tests, like in the next patch.

Example for Spectrum-2 output:

$ devlink resource show pci/0000:06:00.0
...
  name rif_mac_profiles size 4 occ 0 unit entry dpipe_tables none
Signed-off-by: Danielle Ratson <danieller@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlxsw/spectrum.c

@@ -3282,6 +3282,30 @@ static int mlxsw_sp_resources_span_register(struct mlxsw_core *mlxsw_core)
 					 &span_size_params);
 }
 
+static int
+mlxsw_sp_resources_rif_mac_profile_register(struct mlxsw_core *mlxsw_core)
+{
+	struct devlink *devlink = priv_to_devlink(mlxsw_core);
+	struct devlink_resource_size_params size_params;
+	u8 max_rif_mac_profiles;
+
+	if (!MLXSW_CORE_RES_VALID(mlxsw_core, MAX_RIF_MAC_PROFILES))
+		return -EIO;
+
+	max_rif_mac_profiles = MLXSW_CORE_RES_GET(mlxsw_core,
+						  MAX_RIF_MAC_PROFILES);
+	devlink_resource_size_params_init(&size_params, max_rif_mac_profiles,
+					  max_rif_mac_profiles, 1,
+					  DEVLINK_RESOURCE_UNIT_ENTRY);
+
+	return devlink_resource_register(devlink,
+					 "rif_mac_profiles",
+					 max_rif_mac_profiles,
+					 MLXSW_SP_RESOURCE_RIF_MAC_PROFILES,
+					 DEVLINK_RESOURCE_ID_PARENT_TOP,
+					 &size_params);
+}
+
 static int mlxsw_sp1_resources_register(struct mlxsw_core *mlxsw_core)
 {
 	int err;
@@ -3300,10 +3324,16 @@ static int mlxsw_sp1_resources_register(struct mlxsw_core *mlxsw_core)
 
 	err = mlxsw_sp_policer_resources_register(mlxsw_core);
 	if (err)
-		goto err_resources_counter_register;
+		goto err_policer_resources_register;
+
+	err = mlxsw_sp_resources_rif_mac_profile_register(mlxsw_core);
+	if (err)
+		goto err_resources_rif_mac_profile_register;
 
 	return 0;
 
+err_resources_rif_mac_profile_register:
+err_policer_resources_register:
 err_resources_counter_register:
 err_resources_span_register:
 	devlink_resources_unregister(priv_to_devlink(mlxsw_core), NULL);
@@ -3328,10 +3358,16 @@ static int mlxsw_sp2_resources_register(struct mlxsw_core *mlxsw_core)
 
 	err = mlxsw_sp_policer_resources_register(mlxsw_core);
 	if (err)
-		goto err_resources_counter_register;
+		goto err_policer_resources_register;
+
+	err = mlxsw_sp_resources_rif_mac_profile_register(mlxsw_core);
+	if (err)
+		goto err_resources_rif_mac_profile_register;
 
 	return 0;
 
+err_resources_rif_mac_profile_register:
+err_policer_resources_register:
 err_resources_counter_register:
 err_resources_span_register:
 	devlink_resources_unregister(priv_to_devlink(mlxsw_core), NULL);

drivers/net/ethernet/mellanox/mlxsw/spectrum.h

@@ -67,6 +67,7 @@ enum mlxsw_sp_resource_id {
 	MLXSW_SP_RESOURCE_COUNTERS_RIF,
 	MLXSW_SP_RESOURCE_GLOBAL_POLICERS,
 	MLXSW_SP_RESOURCE_SINGLE_RATE_POLICERS,
+	MLXSW_SP_RESOURCE_RIF_MAC_PROFILES,
 };
 
 struct mlxsw_sp_port;

drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c

@@ -9762,6 +9762,7 @@ static const struct mlxsw_sp_rif_ops *mlxsw_sp2_rif_ops_arr[] = {
 static int mlxsw_sp_rifs_init(struct mlxsw_sp *mlxsw_sp)
 {
 	u64 max_rifs = MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS);
+	struct devlink *devlink = priv_to_devlink(mlxsw_sp->core);
 	struct mlxsw_core *core = mlxsw_sp->core;
 
 	if (!MLXSW_CORE_RES_VALID(core, MAX_RIF_MAC_PROFILES))
@@ -9777,17 +9778,24 @@ static int mlxsw_sp_rifs_init(struct mlxsw_sp *mlxsw_sp)
 
 	idr_init(&mlxsw_sp->router->rif_mac_profiles_idr);
 	atomic_set(&mlxsw_sp->router->rif_mac_profiles_count, 0);
+	devlink_resource_occ_get_register(devlink,
+					  MLXSW_SP_RESOURCE_RIF_MAC_PROFILES,
+					  mlxsw_sp_rif_mac_profiles_occ_get,
+					  mlxsw_sp);
 
 	return 0;
 }
 
 static void mlxsw_sp_rifs_fini(struct mlxsw_sp *mlxsw_sp)
 {
+	struct devlink *devlink = priv_to_devlink(mlxsw_sp->core);
 	int i;
 
 	for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS); i++)
 		WARN_ON_ONCE(mlxsw_sp->router->rifs[i]);
 
+	devlink_resource_occ_get_unregister(devlink,
+					    MLXSW_SP_RESOURCE_RIF_MAC_PROFILES);
 	WARN_ON(!idr_is_empty(&mlxsw_sp->router->rif_mac_profiles_idr));
 	idr_destroy(&mlxsw_sp->router->rif_mac_profiles_idr);
 	kfree(mlxsw_sp->router->rifs);