Visible to Intel only — GUID: nfe1714131480905
Ixiasoft
Visible to Intel only — GUID: nfe1714131480905
Ixiasoft
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.
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.
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 |