56 lines
1.9 KiB
Python
56 lines
1.9 KiB
Python
# Copyright (c) 2013 Intel, Inc.
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# Copyright (c) 2012 OpenStack Foundation
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import re
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from nova import exception
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PCI_VENDOR_PATTERN = "^(hex{4})$".replace("hex", "[\da-fA-F]")
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_PCI_ADDRESS_PATTERN = ("^(hex{4}):(hex{2}):(hex{2}).(oct{1})$".
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replace("hex", "[\da-fA-F]").
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replace("oct", "[0-7]"))
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_PCI_ADDRESS_REGEX = re.compile(_PCI_ADDRESS_PATTERN)
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def pci_device_prop_match(pci_dev, specs):
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"""Check if the pci_dev meet spec requirement
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Specs is a list of PCI device property requirements.
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An example of device requirement that the PCI should be either:
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a) Device with vendor_id as 0x8086 and product_id as 0x8259, or
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b) Device with vendor_id as 0x10de and product_id as 0x10d8:
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[{"vendor_id":"8086", "product_id":"8259"},
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{"vendor_id":"10de", "product_id":"10d8"}]
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"""
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def _matching_devices(spec):
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return all(pci_dev.get(k) == v for k, v in spec.iteritems())
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return any(_matching_devices(spec) for spec in specs)
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def parse_address(address):
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"""Returns (domain, bus, slot, function) from PCI address that is stored in
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PciDevice DB table.
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"""
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m = _PCI_ADDRESS_REGEX.match(address)
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if not m:
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raise exception.PciDeviceWrongAddressFormat(address=address)
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return m.groups()
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