Method to virtualize PCIe controllers to support boot/hibernation/crash-dump from a spanned virtual disk

An information handling system, comprising:

• a processor;
• and
• a computer readable medium, including processor executable instructions for performing device stack operations comprising:
• establishing a driver stack including:
• a physical device object for each physical storage controller coupled to a PCI bus;
• a protocol functional driver object (FDO) corresponding to each physical device object;
• a storage controller bus driver FDO coupled to each of the protocol FDOs and configured to expose a single virtual controller physical device object (PDO) for each of a plurality of storage protocols;
• a virtual miniport driver FDO coupled to each virtual controller PDO
• a storport FDO coupled to each of the virtual miniport FDOs and further configured to expose a virtual disk PDO corresponding to each of the virtual miniport driver FDOs;
• and
• a disk driver FDO associated with each of the virtual disk PDOs.

A computer readable storage medium including processor executable instructions that, when executed, cause the processor to perform operations including:

• discovering and initializing, by a storage protocol function driver, physical storage controllers coupled to a bus;
• exposing, by a storage controller bus driver, a protocol-specific virtual controller, corresponding to all physical storage controllers of a particular protocol, to a virtual miniport driver;
• initializing, by the virtual miniport driver, the protocol-specific virtual controller and discovering a redundant array of independent drives (RAID) virtual disk associated with the protocol-specific virtual controller, wherein the RAID virtual disk spans a plurality of the physical storage controllers of the particular protocol;
• and
• responsive to receiving a request for logical units (LUNs) from a storport driver, exposing, by the virtual miniport driver, the RAID virtual disk to the storport driver.