System and method to detect and recover from inoperable device management bus

A system for managing a device management bus coupled to a plurality of managed devices, the system comprising:

• a shared memory storing bus status counters;
• a remote access controller coupled to the plurality of managed devices via the device management bus, the remote access controller configured to:
• offload bus transactions that utilize a first protocol to a bus protocol controller;
• process device management bus transactions that utilize a second protocol;
• update the bus status counters based on a monitored status of the second protocol transactions;
• and
• determine the status of the device management bus based on the bus status counters in shared memory;
• and
• the bus protocol controller configured for managing bus operations using the second protocol, wherein the bus protocol controller comprises an I2C co-processor of the remote access controller, the bus protocol controller further configured to:
• process the offloaded transactions using the second protocol;
• update bus status counters based on the status of the offloaded second protocol transactions.

A remote access controller for detecting and recovering from an inoperable device management bus, wherein the remote access controller comprises one or more processors that execute instructions for remote management of a plurality of managed devices of an Information Handling System (IHS) via sideband bus connections with the managed devices, the remote access controller configured to:

• offload device management bus transactions using a first protocol to a bus protocol controller managing bus operations using the first protocol;
• update bus status counters stored in a shared memory based on the status of the offloaded first protocol transactions;
• process device management bus transactions using a second protocol;
• updating the bus status counters based on the status of the second protocol transactions;
• determine the status of the device management bus based on the bus status counters in shared memory;
• and
• if the device management bus is inoperable, reset the remote management access controller.