Virtual function timeout for single root input/output virtualization controllers
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United States of America Patent
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Sep 15, 2015
Grant Date -
Sep 4, 2014
app pub date -
Mar 13, 2013
filing date -
Mar 1, 2013
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Systems and methods presented herein provide for resetting a controller in a Single Root Input/Output Virtualization (SR-IOV) architecture. The architecture includes a physical function that periodically issues a heartbeat command to a physical function of an SR-IOV controller, starts a first timer, determines a firmware failure of the controller upon expiration of the first timer, and issues a command to reset the firmware of the controller. The architecture also includes a plurality of a virtual function drivers coupled to a plurality of virtual functions of the controller. Each virtual function driver periodically issues a heartbeat command to its corresponding virtual function, starts a second timer having a duration that is less than a duration of the first timer, determines a firmware failure of the controller upon expiration of the second timer, and pauses input/output operations to its corresponding virtual function until the firmware of the controller is reset.
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