GTS AXI Streaming Intel® FPGA IP for PCI Express* User Guide

ID 813754
Date 11/04/2024
Public
Document Table of Contents

7.6.5.2. TPH Requester Capability Register

Addess: Offset 0x4

This is a ead-oly egiste that specifies the capabilities associated with the implemetatio of the TPH i the device. Note that ST Table must be implemeted i the use logic if peset. The capability does ot hold the ST table.

Table 107.  TPH Requeste Capability Registe Desciptio
Bit Locatio Desciptio Attibutes Default
0

No ST Mode Suppoted.

Whe set to 1, idicates that this Fuctio suppots the “No ST Mode” fo the geeatio of TPH Steeig Tags. I the No ST Mode, the device must use a Steeig Tag value of 0 fo all equests.

This bit is hadwied to 1, as all TPH Requestes ae equied to suppot the No ST Mode of opeatio.

RO 1
1

Iteupt Vecto Mode Suppoted.

A settig of 1 idicates that the Fuctio suppots the Iteupt Vecto Mode fo TPH Steeig Tag geeatio. I the Iteupt Vecto Mode, Steeig Tags ae attached to MSI/MSI-X iteupt equests. The Steeig Tag fo each iteupt equest is selected by the MSI/MSI-X iteupt vecto umbe.

RO Pogammable
2

Device-Specific Mode Suppoted.

A settig of 1 idicates that the Fuctio suppots the Device-Specific Mode fo TPH Steeig Tag geeatio. The cliet typically choses the Steeig Tag values fom the ST Table, but is ot equied to do so.

RO Pogammable
7:3 Reseved RO 0
8

Exteded TPH Requeste Suppoted.

Whe set to 1, idicates that the Fuctio is capable of geeatig equests with 16-bit Steeig Tags, usig TLP Pefix.

RO Pogammable
10:9

ST Table Locatio

The settig of this field idicates if a Steeig Tag Table is implemeted fo this Fuctio, ad its locatio if peset.
  • 0 = ST Table ot peset
  • 1 = ST Table i the TPH Requeste Capability Stuctue
  • 2 = ST values stoed i the MSI-X Table i cliet RAM
  • 3 = Reseved

Valid settigs ae 0 o 2.

RO Pogammable
15:11 Reseved RO 0
26:16

ST Table Size.

Specifies the umbe of eties i the Steeig Tag Table (0 = 1 ety, 1 = 2 eties, ad so o). Max limit is 2048 eties whe located i the MSI-X table. Each ety is 8 bits log.

RO Pogammable
31:17 Reseved RO 0