[PATCH v2 8/8] dts: use Unpack for type checking and hinting

[Luca Vizzarro <luca.vizzarro@arm.com>]

Interactive shells that inherit DPDKShell initialise their params
classes from a kwargs dict. Therefore, static type checking is
disabled. This change uses the functionality of Unpack added in
PEP 692 to re-enable it. The disadvantage is that this functionality has
been implemented only with TypedDict, forcing the creation of TypedDict
mirrors of the Params classes.

Signed-off-by: Luca Vizzarro <luca.vizzarro@arm.com>
Reviewed-by: Paul Szczepanek <paul.szczepanek@arm.com>
---
 dts/framework/params/types.py                 | 133 ++++++++++++++++++
 dts/framework/remote_session/testpmd_shell.py |   5 +-
 2 files changed, 137 insertions(+), 1 deletion(-)
 create mode 100644 dts/framework/params/types.py

diff --git a/dts/framework/params/types.py b/dts/framework/params/types.py
new file mode 100644
index 0000000000..e668f658d8
--- /dev/null
+++ b/dts/framework/params/types.py
@@ -0,0 +1,133 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright(c) 2024 Arm Limited
+
+"""Module containing TypeDict-equivalents of Params classes for static typing and hinting.
+
+TypedDicts can be used in conjunction with Unpack and kwargs for type hinting on function calls.
+
+Example:
+    ..code:: python
+        def create_testpmd(**kwargs: Unpack[TestPmdParamsDict]):
+            params = TestPmdParams(**kwargs)
+"""
+
+from pathlib import PurePath
+from typing import TypedDict
+
+from framework.params import Switch, YesNoSwitch
+from framework.params.testpmd import (
+    AnonMempoolAllocationMode,
+    EthPeer,
+    Event,
+    FlowGenForwardingMode,
+    HairpinMode,
+    NoisyForwardingMode,
+    Params,
+    PortNUMAConfig,
+    PortTopology,
+    RingNUMAConfig,
+    RSSSetting,
+    RXMultiQueueMode,
+    RXRingParams,
+    SimpleForwardingModes,
+    SimpleMempoolAllocationMode,
+    TxIPAddrPair,
+    TXOnlyForwardingMode,
+    TXRingParams,
+    TxUDPPortPair,
+)
+from framework.testbed_model.cpu import LogicalCoreList
+from framework.testbed_model.port import Port
+from framework.testbed_model.virtual_device import VirtualDevice
+
+
+class EalParamsDict(TypedDict, total=False):
+    """:class:`TypedDict` equivalent of :class:`~.eal.EalParams`."""
+
+    lcore_list: LogicalCoreList | None
+    memory_channels: int | None
+    prefix: str
+    no_pci: Switch
+    vdevs: list[VirtualDevice] | None
+    ports: list[Port] | None
+    other_eal_param: Params | None
+
+
+class TestPmdParamsDict(EalParamsDict, total=False):
+    """:class:`TypedDict` equivalent of :class:`~.testpmd.TestPmdParams`."""
+
+    interactive_mode: Switch
+    auto_start: Switch
+    tx_first: Switch
+    stats_period: int | None
+    display_xstats: list[str] | None
+    nb_cores: int | None
+    coremask: int | None
+    nb_ports: int | None
+    port_topology: PortTopology | None
+    portmask: int | None
+    portlist: str | None
+    numa: YesNoSwitch
+    socket_num: int | None
+    port_numa_config: list[PortNUMAConfig] | None
+    ring_numa_config: list[RingNUMAConfig] | None
+    total_num_mbufs: int | None
+    mbuf_size: list[int] | None
+    mbcache: int | None
+    max_pkt_len: int | None
+    eth_peers_configfile: PurePath | None
+    eth_peer: list[EthPeer] | None
+    tx_ip: TxIPAddrPair | None
+    tx_udp: TxUDPPortPair | None
+    enable_lro: Switch
+    max_lro_pkt_size: int | None
+    disable_crc_strip: Switch
+    enable_scatter: Switch
+    enable_hw_vlan: Switch
+    enable_hw_vlan_filter: Switch
+    enable_hw_vlan_strip: Switch
+    enable_hw_vlan_extend: Switch
+    enable_hw_qinq_strip: Switch
+    pkt_drop_enabled: Switch
+    rss: RSSSetting | None
+    forward_mode: (
+        SimpleForwardingModes
+        | FlowGenForwardingMode
+        | TXOnlyForwardingMode
+        | NoisyForwardingMode
+        | None
+    )
+    hairpin_mode: HairpinMode | None
+    hairpin_queues: int | None
+    burst: int | None
+    enable_rx_cksum: Switch
+    rx_queues: int | None
+    rx_ring: RXRingParams | None
+    no_flush_rx: Switch
+    rx_segments_offsets: list[int] | None
+    rx_segments_length: list[int] | None
+    multi_rx_mempool: Switch
+    rx_shared_queue: Switch | int
+    rx_offloads: int | None
+    rx_mq_mode: RXMultiQueueMode | None
+    tx_queues: int | None
+    tx_ring: TXRingParams | None
+    tx_offloads: int | None
+    eth_link_speed: int | None
+    disable_link_check: Switch
+    disable_device_start: Switch
+    no_lsc_interrupt: Switch
+    no_rmv_interrupt: Switch
+    bitrate_stats: int | None
+    latencystats: int | None
+    print_events: list[Event] | None
+    mask_events: list[Event] | None
+    flow_isolate_all: Switch
+    disable_flow_flush: Switch
+    hot_plug: Switch
+    vxlan_gpe_port: int | None
+    geneve_parsed_port: int | None
+    lock_all_memory: YesNoSwitch
+    mempool_allocation_mode: SimpleMempoolAllocationMode | AnonMempoolAllocationMode | None
+    record_core_cycles: Switch
+    record_burst_status: Switch
diff --git a/dts/framework/remote_session/testpmd_shell.py b/dts/framework/remote_session/testpmd_shell.py
index 92930d7fbb..5b3a7bb9ab 100644
--- a/dts/framework/remote_session/testpmd_shell.py
+++ b/dts/framework/remote_session/testpmd_shell.py
@@ -18,8 +18,11 @@
 from pathlib import PurePath
 from typing import ClassVar
 
+from typing_extensions import Unpack
+
 from framework.exception import InteractiveCommandExecutionError
 from framework.params.testpmd import SimpleForwardingModes, TestPmdParams
+from framework.params.types import TestPmdParamsDict
 from framework.remote_session.dpdk_shell import DPDKShell
 from framework.settings import SETTINGS
 from framework.testbed_model.cpu import LogicalCoreCount, LogicalCoreList
@@ -76,7 +79,7 @@ def __init__(
         ascending_cores: bool = True,
         append_prefix_timestamp: bool = True,
         start_on_init: bool = True,
-        **app_params,
+        **app_params: Unpack[TestPmdParamsDict],
     ) -> None:
         """Overrides :meth:`~.dpdk_shell.DPDKShell.__init__`. Changes app_params to kwargs."""
         super().__init__(
-- 
2.34.1