Visible to Intel only — GUID: nik1410905470504
Ixiasoft
Visible to Intel only — GUID: nik1410905470504
Ixiasoft
5.4. MSI Interrupts for Endpoints
The MSI interrupt notifies the host when a DMA operation has completed. After the host receives this interrupt, it can poll the DMA read or write status table to determine which entry or entries have the done bit set. This mechanism allows host software to avoid continuous polling of the status table done bits. Use this interface to receive information required to generate MSI or MSI-X interrupts to the Root Port via the TX Slave interface.
Signal |
Direction |
Description |
---|---|---|
MSIIntfc_o[81:0] |
Output |
This bus provides the following MSI address, data, and enabled signals:
|
MSIXIntfc_o[15:0] |
Output |
Provides for system software control of MSI-X as defined in Section 6.8.2.3 Message Control for MSI-X in the PCI Local Bus Specification, Rev. 3.0. The following fields are defined:
|
MSIControl_o[15:0] | Output |
Provides system software control of the MSI messages as defined in Section 6.8.1.3 Message Control for MSI in the PCI Local Bus Specification, Rev. 3.0. The following fields are defined:
|
intx_req_i | Input |
Legacy interrupt request. |
intx_ack_o | Output |
Legacy interrupt acknowledge. |