On Mon, Oct 27, 2025 at 9:02 AM Andrew Bailey <abailey@iol.unh.edu> wrote:
Currently, there is no support for tracking tx_offload capabilities and
there is no separation between port capabilities and queue
capabilities. This is an issue if a test case requires a tx_offload
capability or if a test case requires that a card supports a capability
on a queue. This causes test cases with said requirements to not be
skipped when appropriate. Add tx_offload capabilities and distinguish
capabilities between ports and queues.

Signed-off-by: Andrew Bailey <abailey@iol.unh.edu>
Signed-off-by: Jeremy Spewock <jspewock@iol.unh.edu>
---
 dts/api/capabilities.py                   | 126 ++++++++++--
 dts/api/testpmd/__init__.py               |  97 ++++++++-
 dts/api/testpmd/types.py                  | 227 +++++++++++++++-------
 dts/framework/parser.py                   |  30 +++
 dts/framework/testbed_model/capability.py | 109 +++++++++--
 dts/tests/TestSuite_checksum_offload.py   |  10 +-
 dts/tests/TestSuite_pmd_buffer_scatter.py |   4 +-
 dts/tests/TestSuite_vlan.py               |   4 +-
 8 files changed, 489 insertions(+), 118 deletions(-)

diff --git a/dts/api/capabilities.py b/dts/api/capabilities.py
index 1a79413f6f..243759668f 100644
--- a/dts/api/capabilities.py
+++ b/dts/api/capabilities.py
@@ -77,45 +77,65 @@ class NicCapability(IntEnum):
     #: Scattered packets Rx enabled.
     SCATTERED_RX_ENABLED = 0
     #: Device supports VLAN stripping.
-    RX_OFFLOAD_VLAN_STRIP = auto()
+    PORT_RX_OFFLOAD_VLAN_STRIP = auto()
+    QUEUE_RX_OFFLOAD_VLAN_STRIP = auto()
     #: Device supports L3 checksum offload.
-    RX_OFFLOAD_IPV4_CKSUM = auto()
+    PORT_RX_OFFLOAD_IPV4_CKSUM = auto()
+    QUEUE_RX_OFFLOAD_IPV4_CKSUM = auto()
     #: Device supports L4 checksum offload.
-    RX_OFFLOAD_UDP_CKSUM = auto()
+    PORT_RX_OFFLOAD_UDP_CKSUM = auto()
+    QUEUE_RX_OFFLOAD_UDP_CKSUM = auto()
     #: Device supports L4 checksum offload.
-    RX_OFFLOAD_TCP_CKSUM = auto()
+    PORT_RX_OFFLOAD_TCP_CKSUM = auto()
+    QUEUE_RX_OFFLOAD_TCP_CKSUM = auto()
     #: Device supports Large Receive Offload.
-    RX_OFFLOAD_TCP_LRO = auto()
+    PORT_RX_OFFLOAD_TCP_LRO = auto()
+    QUEUE_RX_OFFLOAD_TCP_LRO = auto()
     #: Device supports QinQ (queue in queue) offload.
-    RX_OFFLOAD_QINQ_STRIP = auto()
+    PORT_RX_OFFLOAD_QINQ_STRIP = auto()
+    QUEUE_RX_OFFLOAD_QINQ_STRIP = auto()
     #: Device supports inner packet L3 checksum.
-    RX_OFFLOAD_OUTER_IPV4_CKSUM = auto()
+    PORT_RX_OFFLOAD_OUTER_IPV4_CKSUM = auto()
+    QUEUE_RX_OFFLOAD_OUTER_IPV4_CKSUM = auto()
     #: Device supports MACsec.
-    RX_OFFLOAD_MACSEC_STRIP = auto()
+    PORT_RX_OFFLOAD_MACSEC_STRIP = auto()
+    QUEUE_RX_OFFLOAD_MACSEC_STRIP = auto()
     #: Device supports filtering of a VLAN Tag identifier.
-    RX_OFFLOAD_VLAN_FILTER = auto()
+    PORT_RX_OFFLOAD_VLAN_FILTER = auto()
+    QUEUE_RX_OFFLOAD_VLAN_FILTER = auto()
     #: Device supports VLAN offload.
-    RX_OFFLOAD_VLAN_EXTEND = auto()
+    PORT_RX_OFFLOAD_VLAN_EXTEND = auto()
+    QUEUE_RX_OFFLOAD_VLAN_EXTEND = auto()
     #: Device supports receiving segmented mbufs.
-    RX_OFFLOAD_SCATTER = auto()
+    PORT_RX_OFFLOAD_SCATTER = auto()
+    QUEUE_RX_OFFLOAD_SCATTER = auto()
     #: Device supports Timestamp.
-    RX_OFFLOAD_TIMESTAMP = auto()
+    PORT_RX_OFFLOAD_TIMESTAMP = auto()
+    QUEUE_RX_OFFLOAD_TIMESTAMP = auto()
     #: Device supports crypto processing while packet is received in NIC.
-    RX_OFFLOAD_SECURITY = auto()
+    PORT_RX_OFFLOAD_SECURITY = auto()
+    QUEUE_RX_OFFLOAD_SECURITY = auto()
     #: Device supports CRC stripping.
-    RX_OFFLOAD_KEEP_CRC = auto()
+    PORT_RX_OFFLOAD_KEEP_CRC = auto()
+    QUEUE_RX_OFFLOAD_KEEP_CRC = auto()
     #: Device supports L4 checksum offload.
-    RX_OFFLOAD_SCTP_CKSUM = auto()
+    PORT_RX_OFFLOAD_SCTP_CKSUM = auto()
+    QUEUE_RX_OFFLOAD_SCTP_CKSUM = auto()
     #: Device supports inner packet L4 checksum.
-    RX_OFFLOAD_OUTER_UDP_CKSUM = auto()
+    PORT_RX_OFFLOAD_OUTER_UDP_CKSUM = auto()
+    QUEUE_RX_OFFLOAD_OUTER_UDP_CKSUM = auto()
     #: Device supports RSS hashing.
-    RX_OFFLOAD_RSS_HASH = auto()
+    PORT_RX_OFFLOAD_RSS_HASH = auto()
+    QUEUE_RX_OFFLOAD_RSS_HASH = auto()
     #: Device supports scatter Rx packets to segmented mbufs.
-    RX_OFFLOAD_BUFFER_SPLIT = auto()
+    PORT_RX_OFFLOAD_BUFFER_SPLIT = auto()
+    QUEUE_RX_OFFLOAD_BUFFER_SPLIT = auto()
     #: Device supports all checksum capabilities.
-    RX_OFFLOAD_CHECKSUM = auto()
+    PORT_RX_OFFLOAD_CHECKSUM = auto()
+    QUEUE_RX_OFFLOAD_CHECKSUM = auto()
     #: Device supports all VLAN capabilities.
-    RX_OFFLOAD_VLAN = auto()
+    PORT_RX_OFFLOAD_VLAN = auto()
+    QUEUE_RX_OFFLOAD_VLAN = auto()
     #: Device supports Rx queue setup after device started.
     RUNTIME_RX_QUEUE_SETUP = auto()
     #: Device supports Tx queue setup after device started.
@@ -132,6 +152,72 @@ class NicCapability(IntEnum):
     FLOW_CTRL = auto()
     #: Device is running on a physical function.
     PHYSICAL_FUNCTION = auto()
+    #:
+    PORT_TX_OFFLOAD_VLAN_INSERT = auto()
+    QUEUE_TX_OFFLOAD_VLAN_INSERT = auto()
+    #:
+    PORT_TX_OFFLOAD_IPV4_CKSUM = auto()
+    QUEUE_TX_OFFLOAD_IPV4_CKSUM = auto()
+    #:
+    PORT_TX_OFFLOAD_UDP_CKSUM = auto()
+    QUEUE_TX_OFFLOAD_UDP_CKSUM = auto()
+    #:
+    PORT_TX_OFFLOAD_TCP_CKSUM = auto()
+    QUEUE_TX_OFFLOAD_TCP_CKSUM = auto()
+    #:
+    PORT_TX_OFFLOAD_SCTP_CKSUM = auto()
+    QUEUE_TX_OFFLOAD_SCTP_CKSUM = auto()
+    #:
+    PORT_TX_OFFLOAD_TCP_TSO = auto()
+    QUEUE_TX_OFFLOAD_TCP_TSO = auto()
+    #:
+    PORT_TX_OFFLOAD_UDP_TSO = auto()
+    QUEUE_TX_OFFLOAD_UDP_TSO = auto()
+    #:
+    PORT_TX_OFFLOAD_OUTER_IPV4_CKSUM = auto()
+    QUEUE_TX_OFFLOAD_OUTER_IPV4_CKSUM = auto()
+    #:
+    PORT_TX_OFFLOAD_QINQ_INSERT = auto()
+    QUEUE_TX_OFFLOAD_QINQ_INSERT = auto()
+    #:
+    PORT_TX_OFFLOAD_VXLAN_TNL_TSO = auto()
+    QUEUE_TX_OFFLOAD_VXLAN_TNL_TSO = auto()
+    #:
+    PORT_TX_OFFLOAD_GRE_TNL_TSO = auto()
+    QUEUE_TX_OFFLOAD_GRE_TNL_TSO = auto()
+    #:
+    PORT_TX_OFFLOAD_IPIP_TNL_TSO = auto()
+    QUEUE_TX_OFFLOAD_IPIP_TNL_TSO = auto()
+    #:
+    PORT_TX_OFFLOAD_GENEVE_TNL_TSO = auto()
+    QUEUE_TX_OFFLOAD_GENEVE_TNL_TSO = auto()
+    #:
+    PORT_TX_OFFLOAD_MACSEC_INSERT = auto()
+    QUEUE_TX_OFFLOAD_MACSEC_INSERT = auto()
+    #:
+    PORT_TX_OFFLOAD_MT_LOCKFREE = auto()
+    QUEUE_TX_OFFLOAD_MT_LOCKFREE = auto()
+    #:
+    PORT_TX_OFFLOAD_MULTI_SEGS = auto()
+    QUEUE_TX_OFFLOAD_MULTI_SEGS = auto()
+    #:
+    PORT_TX_OFFLOAD_MBUF_FAST_FREE = auto()
+    QUEUE_TX_OFFLOAD_MBUF_FAST_FREE = auto()
+    #:
+    PORT_TX_OFFLOAD_SECURITY = auto()
+    QUEUE_TX_OFFLOAD_SECURITY = auto()
+    #:
+    PORT_TX_OFFLOAD_UDP_TNL_TSO = auto()
+    QUEUE_TX_OFFLOAD_UDP_TNL_TSO = auto()
+    #:
+    PORT_TX_OFFLOAD_IP_TNL_TSO = auto()
+    QUEUE_TX_OFFLOAD_IP_TNL_TSO = auto()
+    #:
+    PORT_TX_OFFLOAD_OUTER_UDP_CKSUM = auto()
+    QUEUE_TX_OFFLOAD_OUTER_UDP_CKSUM = auto()
+    #:
+    PORT_TX_OFFLOAD_SEND_ON_TIMESTAMP = auto()
+    QUEUE_TX_OFFLOAD_SEND_ON_TIMESTAMP = auto()


 def requires_link_topology(
diff --git a/dts/api/testpmd/__init__.py b/dts/api/testpmd/__init__.py
index 9e9cbaf495..aadb7f4e70 100644
--- a/dts/api/testpmd/__init__.py
+++ b/dts/api/testpmd/__init__.py
@@ -39,6 +39,8 @@
     FlowRule,
     RxOffloadCapabilities,
     RxOffloadCapability,
+    RxOffloadConfiguration,
+    RxTxLiteralSwitch,
     TestPmdDevice,
     TestPmdPort,
     TestPmdPortFlowCtrl,
@@ -46,6 +48,9 @@
     TestPmdQueueInfo,
     TestPmdRxqInfo,
     TestPmdVerbosePacket,
+    TxOffloadCapabilities,
+    TxOffloadCapability,
+    TxOffloadConfiguration,
     VLANOffloadFlag,
 )
 from framework.context import get_ctx
@@ -1190,13 +1195,14 @@ def _update_capabilities_from_flag(
         unsupported_capabilities: MutableSet["NicCapability"],
         flag_class: type[Flag],
         supported_flags: Flag,
+        prefix: str = "",
     ) -> None:
         """Divide all flags from `flag_class` into supported and unsupported."""
         for flag in flag_class:
             if flag in supported_flags:
-                supported_capabilities.add(NicCapability[str(flag.name)])
+                supported_capabilities.add(NicCapability[f"{prefix}{flag.name}"])
             else:
-                unsupported_capabilities.add(NicCapability[str(flag.name)])
+                unsupported_capabilities.add(NicCapability[f"{prefix}{flag.name}"])

     @_requires_started_ports
     def get_capabilities_rxq_info(
@@ -1293,6 +1299,55 @@ def get_capabilities_physical_function(
         else:
             unsupported_capabilities.add(NicCapability.PHYSICAL_FUNCTION)

+    @staticmethod
+    def get_offload_capabilities_func(
+        rxtx: RxTxLiteralSwitch,
+    ) -> Callable[["TestPmd", MutableSet["NicCapability"], MutableSet["NicCapability"]], None]:
+        """High-order function that returns a method for gathering Rx/Tx offload capabilities.
+
+        Args:
+            rxtx: whether to gather the rx or tx capabilities in the returned method.
+
+        Returns:
+            A method for gathering Rx/Tx offload capabilities that meets the required structure.
+        """
+
+        def get_capabilities(
+            self: "TestPmd",
+            supported_capabilities: MutableSet["NicCapability"],
+            unsupported_capabilities: MutableSet["NicCapability"],
+        ) -> None:
+            """Get all rx/tx offload capabilities and divide them into supported and unsupported.
+
+            Args:
+                self: The shell instance to get the capabilities from.
+                supported_capabilities: Supported capabilities will be added to this set.
+                unsupported_capabilities: Unsupported capabilities will be added to this set.
+            """
+            self._logger.info(f"Getting {rxtx} offload capabilities.")
+            command = f"show port {self.ports[0].id} {rxtx}_offload capabilities"
+            offload_capabilities_out = self.send_command(command)
+
+            capabilities = TxOffloadCapabilities if rxtx == "tx" else RxOffloadCapabilities
+            offload_capabilities = capabilities.parse(offload_capabilities_out)
+
+            self._update_capabilities_from_flag(
+                supported_capabilities,
+                unsupported_capabilities,
+                TxOffloadCapability if rxtx == "tx" else RxOffloadCapability,
+                offload_capabilities.per_port | offload_capabilities.per_queue,
+                prefix=f"PORT_{rxtx.upper()}_OFFLOAD_",
+            )
+            self._update_capabilities_from_flag(
+                supported_capabilities,
+                unsupported_capabilities,
+                TxOffloadCapability if rxtx == "tx" else RxOffloadCapability,
+                offload_capabilities.per_queue,
+                prefix=f"QUEUE_{rxtx.upper()}_OFFLOAD_",
+            )
+
+        return get_capabilities
+
     @_requires_stopped_ports
     def set_port_mbuf_fast_free(
         self,
@@ -1352,3 +1407,41 @@ def set_queue_mbuf_fast_free(
             raise InteractiveCommandExecutionError(
                 f"Failed to get offload config on port {port_id}, queue {queue_id}:\n{output}"
             )
+
+    @_requires_started_ports
+    def get_offload_config(
+        self,
+        port_id: int,
+        rxtx: RxTxLiteralSwitch,
+        /,
+        verify: bool = True,
+    ) -> RxOffloadConfiguration | TxOffloadConfiguration:
+        """Get the Rx or Tx offload configuration of the queues from the given port.
+
+        Args:
+            port_id: The port ID that contains the desired queues.
+            rxtx: Whether to get the Rx or Tx configuration of the given queues.
+            verify: If :data:`True` the output of the command will be scanned in an attempt to
+                verify that the offload configuration was retrieved successfully on all queues.
+
+        Returns:
+            An offload configuration containing the capabilities of the port and queues.
+
+        Raises:
+            InteractiveCommandExecutionError: If all queue offload configurations could not be
+                retrieved.
+        """
+        config_output = self.send_command(f"show port {port_id} {rxtx}_offload configuration")
+        if verify:
+            if (
+                f"Rx Offloading Configuration of port {port_id}" not in config_output
+                and f"Tx Offloading Configuration of port {port_id}" not in config_output
+            ):
+                self._logger.debug(f"Get port offload config error\n{config_output}")
+                raise InteractiveCommandExecutionError(
+                    f"Failed to get offload config on port {port_id}:\n{config_output}"
+                )
+        if rxtx == "rx":
+            return RxOffloadConfiguration.parse(config_output)
+        else:
+            return TxOffloadConfiguration.parse(config_output)
diff --git a/dts/api/testpmd/types.py b/dts/api/testpmd/types.py
index d1ebf6f2d1..7e28235b18 100644
--- a/dts/api/testpmd/types.py
+++ b/dts/api/testpmd/types.py
@@ -18,6 +18,8 @@
 from framework.parser import ParserFn, TextParser
 from framework.utils import REGEX_FOR_MAC_ADDRESS, StrEnum

+RxTxLiteralSwitch = Literal["rx", "tx"]
+

 class TestPmdDevice:
     """The data of a device that testpmd can recognize.
@@ -1246,7 +1248,99 @@ class TestPmdVerbosePacket(TextParser):
     )


-class RxOffloadCapability(Flag):
+class OffloadCapability(Flag):
+    """Flags generated from RxOffloadCapabilites and TxOffloadCapabilities classes."""
+
+    @classmethod
+    def from_string(cls, line: str) -> Self:
+        """Make an instance from a string containing the flag names separated with a space.
+
+        Args:
+            line: The line to parse.
+
+        Returns:
+            A new instance containing all found flags.
+        """
+        flag = cls(0)
+        for flag_name in line.split():
+            flag |= cls[flag_name]
+        return flag
+
+    @classmethod
+    def from_list(cls, lines: list[str]) -> list[Self]:
+        """Gather capabilities from a list of strings.
+
+        Args:
+            lines: The list of capabilities to make flags from.
+        """
+        return [cls.from_string(line) for line in lines]
+
+    @classmethod
+    def make_parser(
+        cls, port_or_queue: Literal["port", "queue"], /, find_multiple: bool = False
+    ) -> ParserFn:
+        """Make a parser function.
+
+        Args:
+            port_or_queue: If :data:`True`, will return capabilities per port. If :data:`False`,
+                will return capabilities per queue.
+            find_multiple: If :data:`True`, will use :func:`TextParser.find_all` to find all
+                matches for the regex query and return a list of instances based on those matches.
+                If :data:`False`, will return a single instance of the flag based off a single
+                match.
+
+        Returns:
+            ParserFn: A dictionary for the `dataclasses.field` metadata argument containing a
+                parser function that makes an instance of this flag from text.
+        """
+        granularity = port_or_queue.capitalize()
+        regex = rf"{granularity}[\s\[\]\d]+:(.*)$"
+        if find_multiple:
+            return TextParser.wrap(TextParser.find_all(regex, re.MULTILINE), cls.from_list)
+        return TextParser.wrap(TextParser.find(regex, re.MULTILINE), cls.from_string)
+
+
+class TxOffloadCapability(OffloadCapability):
+    """Tx offload capabilities of a device.
+
+    The flags are taken from ``lib/ethdev/rte_ethdev.h``.
+    They're prefixed with ``RTE_ETH_TX_OFFLOAD`` in ``lib/ethdev/rte_ethdev.h``
+    instead of ``TX_OFFLOAD``, which is what testpmd changes the prefix to.
+
+    The ``TX_OFFLOAD`` prefix has been preserved so that the same flag names can be used
+    in :class:`NicCapability`. The prefix is needed in :class:`NicCapability` since there's
+    no other qualifier which would sufficiently distinguish it from other capabilities.
+
+    References:
+        DPDK lib: ``lib/ethdev/rte_ethdev.h``
+        testpmd display function: ``app/test-pmd/cmdline.c:print_rx_offloads()``
+    """
+
+    VLAN_INSERT = auto()
+    IPV4_CKSUM = auto()
+    UDP_CKSUM = auto()
+    TCP_CKSUM = auto()
+    SCTP_CKSUM = auto()
+    TCP_TSO = auto()
+    UDP_TSO = auto()
+    OUTER_IPV4_CKSUM = auto()
+    QINQ_INSERT = auto()
+    VXLAN_TNL_TSO = auto()
+    GRE_TNL_TSO = auto()
+    IPIP_TNL_TSO = auto()
+    GENEVE_TNL_TSO = auto()
+    MACSEC_INSERT = auto()
+    MT_LOCKFREE = auto()
+    MULTI_SEGS = auto()
+    MBUF_FAST_FREE = auto()
+    SECURITY = auto()
+    UDP_TNL_TSO = auto()
+    IP_TNL_TSO = auto()
+    OUTER_UDP_CKSUM = auto()
+    SEND_ON_TIMESTAMP = auto()
+
+
+class RxOffloadCapability(OffloadCapability):
     """Rx offload capabilities of a device.

     The flags are taken from ``lib/ethdev/rte_ethdev.h``.
@@ -1265,102 +1359,103 @@ class RxOffloadCapability(Flag):
     """

     #:
-    RX_OFFLOAD_VLAN_STRIP = auto()
+    VLAN_STRIP = auto()
     #: Device supports L3 checksum offload.
-    RX_OFFLOAD_IPV4_CKSUM = auto()
+    IPV4_CKSUM = auto()
     #: Device supports L4 checksum offload.
-    RX_OFFLOAD_UDP_CKSUM = auto()
+    UDP_CKSUM = auto()
     #: Device supports L4 checksum offload.
-    RX_OFFLOAD_TCP_CKSUM = auto()
+    TCP_CKSUM = auto()
     #: Device supports Large Receive Offload.
-    RX_OFFLOAD_TCP_LRO = auto()
+    TCP_LRO = auto()
     #: Device supports QinQ (queue in queue) offload.
-    RX_OFFLOAD_QINQ_STRIP = auto()
+    QINQ_STRIP = auto()
     #: Device supports inner packet L3 checksum.
-    RX_OFFLOAD_OUTER_IPV4_CKSUM = auto()
+    OUTER_IPV4_CKSUM = auto()
     #: Device supports MACsec.
-    RX_OFFLOAD_MACSEC_STRIP = auto()
+    MACSEC_STRIP = auto()
     #: Device supports filtering of a VLAN Tag identifier.
-    RX_OFFLOAD_VLAN_FILTER = 1 << 9
+    VLAN_FILTER = 1 << 9
     #: Device supports VLAN offload.
-    RX_OFFLOAD_VLAN_EXTEND = auto()
+    VLAN_EXTEND = auto()
     #: Device supports receiving segmented mbufs.
-    RX_OFFLOAD_SCATTER = 1 << 13
+    SCATTER = 1 << 13
     #: Device supports Timestamp.
-    RX_OFFLOAD_TIMESTAMP = auto()
+    TIMESTAMP = auto()
     #: Device supports crypto processing while packet is received in NIC.
-    RX_OFFLOAD_SECURITY = auto()
+    SECURITY = auto()
     #: Device supports CRC stripping.
-    RX_OFFLOAD_KEEP_CRC = auto()
+    KEEP_CRC = auto()
     #: Device supports L4 checksum offload.
-    RX_OFFLOAD_SCTP_CKSUM = auto()
+    SCTP_CKSUM = auto()
     #: Device supports inner packet L4 checksum.
-    RX_OFFLOAD_OUTER_UDP_CKSUM = auto()
+    OUTER_UDP_CKSUM = auto()
     #: Device supports RSS hashing.
-    RX_OFFLOAD_RSS_HASH = auto()
+    RSS_HASH = auto()
     #: Device supports
-    RX_OFFLOAD_BUFFER_SPLIT = auto()
+    BUFFER_SPLIT = auto()
     #: Device supports all checksum capabilities.
-    RX_OFFLOAD_CHECKSUM = RX_OFFLOAD_IPV4_CKSUM | RX_OFFLOAD_UDP_CKSUM | RX_OFFLOAD_TCP_CKSUM
+    CHECKSUM = IPV4_CKSUM | UDP_CKSUM | TCP_CKSUM
     #: Device supports all VLAN capabilities.
-    RX_OFFLOAD_VLAN = (
-        RX_OFFLOAD_VLAN_STRIP
-        | RX_OFFLOAD_VLAN_FILTER
-        | RX_OFFLOAD_VLAN_EXTEND
-        | RX_OFFLOAD_QINQ_STRIP
-    )
+    VLAN = VLAN_STRIP | VLAN_FILTER | VLAN_EXTEND | QINQ_STRIP

-    @classmethod
-    def from_string(cls, line: str) -> Self:
-        """Make an instance from a string containing the flag names separated with a space.

-        Args:
-            line: The line to parse.
+@dataclass
+class OffloadCapabilities(TextParser):
+    """The result of testpmd's ``show port <port_id> rx/tx_offload capabilities`` command."""

-        Returns:
-            A new instance containing all found flags.
-        """
-        flag = cls(0)
-        for flag_name in line.split():
-            flag |= cls[f"RX_OFFLOAD_{flag_name}"]
-        return flag
+    port_id: int = field(metadata=TextParser.find_int(r"Offloading Capabilities of port (\d+) :"))
+    #: Per-queue offload capabilities.
+    per_queue: OffloadCapability
+    #: Capabilities other than per-queue offload capabilities.
+    per_port: OffloadCapability

-    @classmethod
-    def make_parser(cls, per_port: bool) -> ParserFn:
-        """Make a parser function.

-        Args:
-            per_port: If :data:`True`, will return capabilities per port. If :data:`False`,
-                will return capabilities per queue.
+@dataclass
+class RxOffloadCapabilities(OffloadCapabilities):
+    """Extends :class:`OffloadCapabilities` with Rx specific functionality."""

-        Returns:
-            ParserFn: A dictionary for the `dataclasses.field` metadata argument containing a
-                parser function that makes an instance of this flag from text.
-        """
-        granularity = "Port" if per_port else "Queue"
-        return TextParser.wrap(
-            TextParser.find(rf"Per {granularity}\s+:(.*)$", re.MULTILINE),
-            cls.from_string,
-        )
+    per_queue: OffloadCapability = field(metadata=RxOffloadCapability.make_parser("queue"))
+    per_port: OffloadCapability = field(metadata=RxOffloadCapability.make_parser("port"))


 @dataclass
-class RxOffloadCapabilities(TextParser):
-    """The result of testpmd's ``show port <port_id> rx_offload capabilities`` command.
+class TxOffloadCapabilities(OffloadCapabilities):
+    """Extends :class:`OffloadCapabilities` with Tx specific functionality."""

-    References:
-        testpmd command function: ``app/test-pmd/cmdline.c:cmd_rx_offload_get_capa()``
-        testpmd display function: ``app/test-pmd/cmdline.c:cmd_rx_offload_get_capa_parsed()``
-    """
+    per_queue: OffloadCapability = field(metadata=TxOffloadCapability.make_parser("queue"))
+    per_port: OffloadCapability = field(metadata=TxOffloadCapability.make_parser("port"))

-    #:
-    port_id: int = field(
-        metadata=TextParser.find_int(r"Rx Offloading Capabilities of port (\d+) :")
+
+@dataclass
+class OffloadConfiguration(TextParser):
+    """The result of testpmd's ``show port <port_id> rx/tx_offload configuration`` command."""
+
+    port_id: int = field(metadata=TextParser.find_int(r"Offloading Configuration of port (\d+) :"))
+    #: Queue offload configurations.
+    queues: list[OffloadCapability]
+    #: Port offload configuration.
+    port: OffloadCapability

One final nit - I think attribute names queue_configs and port_config would read more clearly. What do you think?
 
Reviewed-by: Patrick Robb <probb@iol.unh.edu>