Abstract:
In one embodiment, a computer system, comprises at least one host node, at least one input/output node coupled to the host node, at least one multi-function device coupled to the input/output node via a switch, and a middle manager processor comprising logic to block an enumeration process in a host node for the multi-function devices behind the switch hierarchy, initiate an enumeration process for the multi-function devices in a manager processor separate from the host node, store a routing table for the switch hierarchy in a memory module coupled to the manager processor, and allocate, in the manager processor, endpoint device resources to the host node.
Abstract:
There is provided a distributed peer-to-peer communication system for interconnect busses of a computer system. More specifically, there is provided a method comprising transmitting a request to establish an isochronous channel between a first device and a second device, establishing the isochronous channel between the first device and the second device, and generating an isochronous transaction across the isochronous channel between the first device and the second device, wherein the isochronous transaction is a message type transaction.
Abstract:
Support for indicating and controlling transaction priority on a PCI-X bus. Embodiments of the invention provide indicia that can be set to communicate to PCI-X-to-PCI-X bridges and Completer that a transaction should be handled specially and scheduled ahead of any other transaction not having their corresponding indicia set. A special handling instruction allows the priority transaction to be scheduled first or early. The indicia are implemented by setting a bit(s) in an unused portion of a PCI-X attribute field, or multiplexed with a used portion, to schedule the associated transaction as the priority transaction over other transactions that do not have their corresponding bit set. The present invention can be used for interrupt messaging, audio streams, video streams, isochronous transactions, or for high performance, low bandwidth control structures used for communication in a multiprocessor architecture across PCI-X.
Abstract:
The present invention relates to a system and method for shadowing data of a first register and a second register of a computer system that share a common address. When a bus agent runs a write operation to the register address, retry logic of a first bridge circuit retries the write operation and masks access by the bus agent to the bus. Retry bus master logic reruns the write operation, in response to which the second bridge circuit subtractively decodes the rerun write operation and transfers the data to the second register. The bus agent is then allowed to retry the initial write operation, in response to which the first bridge circuit positively decodes the retried write operation and transfers the data to the first register. Thus, coherency is preserved between the first and second registers.