Intel S2600WF Technical Product Specification page 64

Intel® Server Board S2600WF Product Family Technical Product Specification
Intel VROC includes the following features:
Hardware is integrated inside the processor PCIe root complex.
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Entire PCIe trees are mapped into their own address spaces (domains).
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Each domain manages x16 PCIe lanes.
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Can be enabled/disabled in BIOS setup at x4 lane granularity.
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• Driver sets up/manages the domain (enumerate, event/error handling)
May load an additional child device driver that is Intel VMD aware.
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Hot plug support - hot insert array of PCIe SSDs.
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• Support for PCIe SSDs and switches only (no network interface controllers (NICs), graphics cards, etc.)
Maximum of 128 PCIe bus numbers per domain.
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• Support for MCTP over SMBus* only.
Support for MMIO only (no port-mapped I/O).
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Does not support NTB, Quick Data Tech, Intel® Omni-Path Architecture, or SR-IOV.
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• Correctable errors do not bring down the system.
Intel VMD only manages devices on PCIe lanes routed directly from the processor. Intel VMD cannot
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provide device management on PCI lanes routed from the chipset (PCH)
When Intel VMD is enabled, the BIOS does not enumerate devices that are behind Intel VMD. The
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Intel VMD-enabled driver is responsible for enumerating these devices and exposing them to the
host.
• Intel VMD supports hot-plug PCIe SSDs connected to switch downstream ports. Intel VMD does not
support hot-plug of the switch itself.
6.3.3.1 Enabling Intel® VMD support
For installed NVMe devices to utilize the Intel VMD features of the server board, Intel VMD must be enabled
on the appropriate CPU PCIe root ports in BIOS setup. By default, Intel VMD support is disabled on all CPU
PCIe root ports in BIOS setup.
See Table 12 to determine which specific CPU PCIe root ports are used to supply the PCIe bus lanes for
onboard OCuLink connectors.
For NVMe devices attached to a riser card via a PCIe switch or plugged directly into a PCIe add-in card slot,
see Table 13, Table 14, and Table 15 to determine CPU PCIe root ports supporting each add-in card slot.
In BIOS setup, the Intel VMD support menu can be found Advanced > PCI Configuration > Volume
Management Device.
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