Visible to Intel only — GUID: hav1711334254122
Ixiasoft
Visible to Intel only — GUID: hav1711334254122
Ixiasoft
4.11. Single Root I/O Virtualization (SR-IOV)
The GTS AXI Streaming IP supports SR-IOV. The endpoint port controllers in the IP support up to 4 physical functions (PF) and 256 virtual functions (VF) per SR-IOV endpoint. The VF configuration space registers are hardened in the PCIe* Hard IP, hence they do not require FPGA fabric resources. The specific VF-based work queues and interrupt tables must be implemented in the FPGA fabric by the user application.
Feature | Support |
---|---|
SR-IOV | Supported in Endpoint mode up to 256 VFs. |
MSI | Supported in PFs only. Not supported in VFs. No Per Vector Masking (PVM). If you need PVM, you must use MSI-X.
Note: Note: When SR-IOV is enabled, either MSI or MSI-X must be enabled.
|
MSI-X | Supported by all PFs. For SR-IOV, PFs and VFs are always MSI-X capable.
Note: VFs share a common Table Size. VF Table BIR/Offset and PBA BIR/Offset are fixed at compile time.
Note: When SR-IOV is enabled, either MSI or MSI-X must be enabled.
|
Function Level Reset (FLR) | Supported by all PFs/VFs. |
Required for all SR-IOV functions. | |
Extended Tags | Supported by all PFs/VFs. The Extended Tags feature allows the TLP Tag field to be 8-bit, thus allowing the support of 256 tags. The application is restricted to a max of 256 outstanding tags, at any given time, for all functions combined. The application logic is responsible for implementing the tag generation/tracking functions. |
10-bit Tags | Supports 10-bit tag completer capability on x8 capable controller. |
AER | PFs are always AER capable. No AER implemented for VFs. |
Active-State Power Management (ASPM) Optionality Compliance | Supported by all PFs/VFs. Only used to indicate ASPM is supported. |
Atomic Ops | Requester capability is supported by all PFs/VFs. Completer capability is supported. Compare and Swap (CAS) AtomicOps are also supported. They can handle up to 128-bit operands. |
Internal Error Reporting | Supported by all PFs (because all PFs are AER capable). No support for VFs (because VFs do not support AER). |
TLP Processing Hints | 2-bit Processing Hint and 8-bit Steering Tag are supported by all PFs/VFs. TPH Prefixes are not supported. You can optionally choose to enable the TPH Requestor capability. However, the IP is always TPH Completer capable. |
ID-Based ordering | Supported by all PFs/VFs. However, the IP core does NOT perform the reordering. The Application Layer must do the reordering. The IP core only provides the IDO Request & Completion Enable bits in the Device Control 2 register. This gives the application permission to set the Attr bits in Requests and Completions that it transmits.
Note: Reordering capability on the RX side may be limited by your bypass queue. On the TX side, the IP core does not set the IDO bits on internally generated TLPs.
|
Relaxed Ordering | Implemented on the RX side. This feature is always active. On the TX side, reordering is done by the application. |
Alternative Routing ID Interpretation (ARI) | EP (PFs/VFs) is always ARI capable. This is a device-level option (all lanes or none will support ARI). In addition, RP will always be ARI capable (ARI Forwarding Supported bit is always 1). |
Address Translation Service (ATS) | Supported by all EP PFs/VFs. |
Page Request Service Interface (PRI) | Supported by all EP PFs/VFs. |
User Extensions (Customer VSEC) | Supported by all PFs/VFs. |
PCIe* 3.0 Receiver Impedance (3.0 ECN) | Supported |
Device Serial Number | Supported |
Completion Timeout Ranges (Device Capabilities 2) | All ranges are supported. |
Data Link Layer Active Reporting Capability (Link Capabilities) | This capability is always supported in RP mode, but not in EP mode. |
Surprise Down Error Reporting Capability (Link Capabilities) | Supported |
PM-PCI Power Management | Only D0/D3 states are supported. |
ASPM (L0s/L1) | Supported |
Process Address Space ID (PASID) | Supported |
TLP prefix | Supported, mainly for PASID |
Latency Tolerance Reporting (LTR) | Supported (only for PASID) |
Access Control Services | Supported |
Advanced Error Reporting (AER) | AER supported for PFs. |