Visible to Intel only — GUID: mms1714466392214
Ixiasoft
Visible to Intel only — GUID: mms1714466392214
Ixiasoft
7.6.6.2. ATS Capability Register and Control Register
Addess: Offset 0x4
The lowe 16 bits of this locatio is defied as the ATS Capability Registe ad the uppe 16 bits as the ATS Cotol Registe.
Bit Locatio | Desciptio | Attibutes | Default |
---|---|---|---|
4:0 | Ivalidate Queue Depth. The umbe of Ivalidate Requests that the Fuctio ca accept befoe puttig backpessue o the upsteam coectio. If 0, the Fuctio ca accept 32 Ivalidate Requests. This field is hadwied to 0 fo VFs. VFs use the settig fom the paet PF’s ATS Capability Registe. |
RO | 0 |
5 | Page Aliged Request. If Set, idicates the Utaslated Addess is always aliged to a 4096 byte bouday. This bit is hadwied to 1. |
RO | Pogammed via Pogammig Iteface |
6 | Global Ivalidate Suppoted. | RO | Pogammed via Pogammig Iteface |
15:7 | Reseved | RO | 0 |
20:16 | Smallest Taslatio Uit (STU) This value idicates to the Fuctio the miimum umbe of 4096-byte blocks that is idicated i a Taslatio Completios o Ivalidate Requests. This is a powe of 2 multiplie ad the umbe of blocks is 2STU. A value of 0 idicates oe block ad a value of 0x1F idicates 231 blocks (o 8 TB total). This field is hadwied to 0 fo VFs. VFs use the settig fom the paet PF's ATS Cotol Registe. |
RO | 0 |
30:21 | Reseved | RO | 0 |
31 | Eable (E). Whe Set, the Fuctio is eabled to cache taslatios. You must obtai this ifomatio fom the cofiguatio itecept iteface. |
RW | 0 |