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authorJuraj Linkeš <juraj.linkes@pantheon.tech>2021-10-12 10:03:04 +0200
committerJuraj Linke? <juraj.linkes@pantheon.tech>2021-11-08 10:38:43 +0000
commit3cba9eaf8dce261928939aa112fae4354b51e229 (patch)
tree03f1748116e22cc172f3a523d18f4b180fef4e54 /resources/libraries/python
parent03e0de0418452c9904dafe74d86e36cf3c2a7289 (diff)
vpp_device: bind to vfio-pci before running tests
In rare cases, binding the whole /dev/vfio folder will result in unusable VFs: notice dpdk EAL: Cannot open /dev/vfio/151: Device or resource busy [0], section 4.3.1. provides some clues as to what's going on and how to avoid the failure. Mounting /dev/vfio reset the file descriptors of all devices under /dev/vfio. Vfio-pci creates a device when an interface is bound to it. The rare failure then occurs when /dev/vfio is mounted while a process is using the file descriptors result in that process using invalid file descriptors (or file descriptors belonging to a different VF). Fix the issue by binding i40e and ice VFs to vfio-pci before containers are created and make sure that the VFs are not unbound later in testing. Only bind DUT VFs since the TG uses the kernel driver. [0]: https://connect.redhat.com/sites/default/files/2021-03/Cloud Native Network Function Requirements.pdf Ticket: CSIT-1794 Change-Id: I83db91b29d16669fb034b141ad247f6f796fdf64 Signed-off-by: Juraj Linkeš <juraj.linkes@pantheon.tech>
Diffstat (limited to 'resources/libraries/python')
-rw-r--r--resources/libraries/python/DUTSetup.py11
1 files changed, 8 insertions, 3 deletions
diff --git a/resources/libraries/python/DUTSetup.py b/resources/libraries/python/DUTSetup.py
index 16acfba7ad..c7a560262c 100644
--- a/resources/libraries/python/DUTSetup.py
+++ b/resources/libraries/python/DUTSetup.py
@@ -444,16 +444,21 @@ class DUTSetup:
)
@staticmethod
- def pci_driver_unbind_list(node, *pci_addrs):
- """Unbind PCI devices from current driver on node.
+ def unbind_pci_devices_from_other_driver(node, driver, *pci_addrs):
+ """Unbind PCI devices from driver other than input driver on node.
:param node: DUT node.
+ :param driver: Driver to not unbind from. If None or empty string,
+ will attempt to unbind from the current driver.
:param pci_addrs: PCI device addresses.
:type node: dict
+ :type driver: str
:type pci_addrs: list
"""
for pci_addr in pci_addrs:
- DUTSetup.pci_driver_unbind(node, pci_addr)
+ if not driver or \
+ DUTSetup.get_pci_dev_driver(node, pci_addr) != driver:
+ DUTSetup.pci_driver_unbind(node, pci_addr)
@staticmethod
def pci_driver_bind(node, pci_addr, driver):