# Copyright (c) 2015 The University of Manchester
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from spinnman.model.enums import (
DiagnosticFilterDestination, DiagnosticFilterSource,
DiagnosticFilterPayloadStatus, DiagnosticFilterDefaultRoutingStatus,
DiagnosticFilterEmergencyRoutingStatus, DiagnosticFilterPacketType)
# Bit offsets of the various fields in the filter word
_PACKET_TYPE_OFFSET = 0
_EMERGENCY_ROUTE_OFFSET = 4
_EMERGENCY_ROUTE_MODE_OFFSET = 8
_DEFAULT_ROUTE_OFFSET = 10
_PAYLOAD_OFFSET = 12
_SOURCE_OFFSET = 14
_DESTINATION_OFFSET = 16
_ENABLE_INTERRUPT_OFFSET = 30
# Uses an enum to set flags in the filter word from a given offset
def _set_flags_in_word(word, enum_list, enum_type, offset):
if enum_list is None:
enum_values = list()
else:
enum_values = list(enum_list)
if not enum_values:
enum_values = [value for value in enum_type]
for enum_value in enum_values:
word |= 1 << (enum_value.value + offset)
return word
# Uses an enum to read flags in the filter word from a given offset
def _read_flags_from_word(word, enum_list, offset):
flags = list()
for enum_value in enum_list:
if word & 1 << (enum_value.value + offset) != 0:
flags.append(enum_value)
return flags
[docs]class DiagnosticFilter(object):
"""
A router diagnostic counter filter, which counts packets passing
through the router with certain properties. The counter will be
incremented so long as the packet matches one of the values in each
field i.e. one of each of the destinations, sources, payload_statuses,
default_routing_statuses, emergency_routing_statuses and packet_types.
"""
__slots__ = [
"_default_routing_statuses",
"_destinations",
"_emergency_routing_statuses",
"_enable_interrupt_on_counter_event",
"_match_emergency_routing_status_to_incoming_packet",
"_packet_types",
"_payload_statuses",
"_sources"]
def __init__(self, enable_interrupt_on_counter_event,
match_emergency_routing_status_to_incoming_packet,
destinations, sources, payload_statuses,
default_routing_statuses, emergency_routing_statuses,
packet_types):
"""
:param bool enable_interrupt_on_counter_event: Indicates whether
an interrupt should be raised when this rule matches
:param bool match_emergency_routing_status_to_incoming_packet:
Indicates whether the emergency routing statuses should be matched
against packets arriving at this router (if True), or if they
should be matched against packets leaving this router (if False)
:param list(DiagnosticFilterDestination) destinations:
Increment the counter if one or more of the given destinations
match
:param list(DiagnosticFilterSource) sources:
Increment the counter if one or more of the given sources match
(or `None` or empty list to match all)
:param list(DiagnosticFilterPayloadStatus) payload_statuses:
Increment the counter if one or more of the given payload statuses
match (or `None` or empty list to match all)
:param default_routing_statuses:
Increment the counter if one or more of the given default routing
statuses match (or `None` or empty list to match all)
:type default_routing_statuses:
list(DiagnosticFilterDefaultRoutingStatus)
:param emergency_routing_statuses:
Increment the counter if one or more of the given emergency routing
statuses match (or `None` or empty list to match all)
:type emergency_routing_statuses:
list(DiagnosticFilterEmergencyRoutingStatus)
:param list(DiagnosticFilterPacketType) packet_types:
Increment the counter if one or more of the given packet types
match (or `None` or empty list to match all)
"""
# pylint: disable=too-many-arguments
self._enable_interrupt_on_counter_event = \
enable_interrupt_on_counter_event
self._match_emergency_routing_status_to_incoming_packet = \
match_emergency_routing_status_to_incoming_packet
self._destinations = destinations
self._sources = sources
self._payload_statuses = payload_statuses
self._default_routing_statuses = default_routing_statuses
self._emergency_routing_statuses = emergency_routing_statuses
self._packet_types = packet_types
@property
def enable_interrupt_on_counter_event(self):
return self._enable_interrupt_on_counter_event
@property
def match_emergency_routing_status_to_incoming_packet(self):
return self._match_emergency_routing_status_to_incoming_packet
@property
def destinations(self):
return self._destinations
@property
def sources(self):
return self._sources
@property
def payload_statuses(self):
return self._payload_statuses
@property
def default_routing_statuses(self):
return self._default_routing_statuses
@property
def emergency_routing_statuses(self):
return self._emergency_routing_statuses
@property
def packet_types(self):
return self._packet_types
@property
def filter_word(self):
"""
A word of data that can be written to the router to set up the filter.
"""
data = 0
if self._enable_interrupt_on_counter_event:
data |= 1 << _ENABLE_INTERRUPT_OFFSET
if not self._match_emergency_routing_status_to_incoming_packet:
data |= 1 << _EMERGENCY_ROUTE_MODE_OFFSET
data = _set_flags_in_word(data, self._destinations,
DiagnosticFilterDestination,
_DESTINATION_OFFSET)
data = _set_flags_in_word(data, self._sources,
DiagnosticFilterSource,
_SOURCE_OFFSET)
data = _set_flags_in_word(data, self._payload_statuses,
DiagnosticFilterPayloadStatus,
_PAYLOAD_OFFSET)
data = _set_flags_in_word(data, self._default_routing_statuses,
DiagnosticFilterDefaultRoutingStatus,
_DEFAULT_ROUTE_OFFSET)
data = _set_flags_in_word(data, self._emergency_routing_statuses,
DiagnosticFilterEmergencyRoutingStatus,
_EMERGENCY_ROUTE_OFFSET)
data = _set_flags_in_word(data, self._packet_types,
DiagnosticFilterPacketType,
_PACKET_TYPE_OFFSET)
return data
[docs] @staticmethod
def read_from_int(int_value):
enable_interrupt_on_counter_event = (
(int_value >> _ENABLE_INTERRUPT_OFFSET) & 0x1) == 1
match_emergency_routing_status_to_incoming_packet = (
(int_value >> _EMERGENCY_ROUTE_MODE_OFFSET) & 0x1) == 0
destinations = _read_flags_from_word(
int_value, DiagnosticFilterDestination, _DESTINATION_OFFSET)
sources = _read_flags_from_word(
int_value, DiagnosticFilterSource, _SOURCE_OFFSET)
payload_statuses = _read_flags_from_word(
int_value, DiagnosticFilterPayloadStatus, _PAYLOAD_OFFSET)
default_routing_statuses = _read_flags_from_word(
int_value, DiagnosticFilterDefaultRoutingStatus,
_DEFAULT_ROUTE_OFFSET)
emergency_routing_statuses = _read_flags_from_word(
int_value, DiagnosticFilterEmergencyRoutingStatus,
_EMERGENCY_ROUTE_OFFSET)
packet_types = _read_flags_from_word(
int_value, DiagnosticFilterPacketType, _PACKET_TYPE_OFFSET)
return DiagnosticFilter(
enable_interrupt_on_counter_event,
match_emergency_routing_status_to_incoming_packet,
destinations, sources, payload_statuses, default_routing_statuses,
emergency_routing_statuses, packet_types)