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Altera_Forum's avatar
Altera_Forum
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18 years ago

PCI Express: configuration

Hi all, I'm working on the transaction layer of my custom PCI Express IP. The problem is that when I answer to the Config Read T0 request from de root complex, with a Completion W/ Data contain...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
18 years ago

Are all of the other fields of the completion correct?

  • Requester ID, Tag, TC, and Attribute fields should be copied as is from the Type 0 Config Request.

  • Completer ID should be copied from the Request Bus, Device, and Function number fields of the Type 0 Config Request. (These values need to be saved for all future completions.)

  • EP, BCM, CS, and TD fields should be zero (In most cases).

  • Length, Byte Count, and Lower address need to be set appropriately based on the original request.