PCIe MISC Tab - 1.0 English

Versal ACAP DMA and Bridge Subsystem for PCI Express Product Guide (PG344)

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1.0 English

The PCIe Miscellaneous tab is shown in the following figure.

Figure 1. PCIe Misc Tab
Number of User Interrupt Request
Up to 16 user interrupt requests can be selected.
Legacy Interrupt Settings
Select one of the Legacy Interrupts: INTA, INTB, INTC, or INTD.
MSI Capabilities
By default, MSI Capabilities is enabled, and 1 vector is enabled. You can choose up to 32 vectors. In general, Linux uses only 1 vector for MSI. This option can be disabled.
MSI-X Capabilities
Select a MSI-X event. For more information, see MSI-X Vector Table and PBA (0x8).
Finite Completion Credits
On systems which support finite completion credits, this option can be enabled for better performance.
Extended Tag Field
The Extended Tag option gives 256 tags. If the Extended Tag option is not selected, DMA uses 32 tag for all devices.
Configuration Extend Interface
PCIe extended interface can be selected for more configuration space. When Configuration Extend Interface is selected, you are responsible for adding logic to extend the interface to make it work properly.
Configuration Management Interface
PCIe Configuration Management interface can be brought to the top level when this options is selected.
Link Status Register
By default, Enable Slot Clock Configuration is selected. This means that the slot configuration bit is enabled in the link status register.