Isolating a PCI host bridge in response to an error event
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United States of America Patent
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Sep 22, 2015
Grant Date -
Apr 2, 2015
app pub date -
Dec 8, 2014
filing date -
Jul 12, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
Instead of disabling PCI communication between system resources in a host computing device and I/O devices when a PCI Host Bridge (PHB) is unable to function, the host computing device may include a redundant PCI communication path for maintaining communication between the system resources and the I/O devices after a first PHB experiences an unrecoverable error. In one embodiment, the redundant PCI communication path includes a second PHB that is maintained in a standby state so long as the first PHB is functioning normally. However, once the first PHB experiences an unrecoverable error, the second PHB is changed to the master state and assumes the responsibility for maintaining communication between the system resources and the I/O devices.
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