| Signal Name | Direction | Description |
|---|---|---|
| dma0_usr_irq_req[NUM_USR_IRQ-1:0] | I | Assert to generate an interrupt. Maintain assertion until interrupt is serviced. |
| dma0_usr_irq_ack[NUM_USR_IRQ-1:0] | O | Indicates that the interrupt has been sent on PCIe. Two acks are generated for legacy interrupts. One ack is generated for MSI interrupts. |
| dma0_usr_irq_func[7:0] | I | In most cases these signals are tied to 0s for function 0. |
NUM_USR_IRQ is selectable and it ranges from 0 to 15. Each bits in dma0_usr_irq_reqbus corresponds to the same bits in
dma0_usr_irq_ack. For example, dma0_usr_irq_ack[0] represents an ack for dma0_usr_irq_req[0].