Implementing concurrent device driver maintenance and recovery for an SRIOV adapter in a virtualized system
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United States of America Patent
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Apr 19, 2016
Grant Date -
Dec 18, 2014
app pub date -
Jun 12, 2013
filing date -
Jun 12, 2013
priority date (Note) -
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Abstract
A method, system and computer program product are provided for implementing concurrent adapter driver maintenance and recovery for a Single Root Input/Output Virtualization (SRIOV) adapter in a computer system. An adapter driver at start up time performs configuration of the adapter and each of a set of virtual functions (VFs). The adapter driver writes critical adapter and VF configuration data to a scratchpad buffer. When device driver maintenance is needed, such as to load updated adapter driver firmware, all VF drivers are held off temporarily, current adapter driver is detached, and then the adapter driver is reloaded with the updated driver firmware. Then the adapter driver is restarted with the updated adapter driver firmware, and performs a reinitialization process. The adapter driver performs adapter and VF configuration restoring existing configuration using values read from the scratchpad buffer.
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