Fabric limiter circuits

摘要

One or more fabric control circuits may be inserted in a communication fabric to control various aspects of the communications by components in the system. The fabric control circuits may be included on the interface of the components to the communication fabric, for example. Some systems that include a hierarchical communication fabric may also include fabric control circuits that may alternatively or additionally be included. The fabric control circuits may be programmable, and thus may provide the ability to tune the communication fabric to meet performance and/or functionality goals.

主权项

1. A fabric control circuit comprising:
an input coupled to a portion of an interface from a transaction source, wherein a remainder of the interface except for the portion is coupled directly from the transaction source to a port of a fabric interface circuit, wherein the fabric interface circuit forms part of a communication fabric in a system; an output coupled to the port, the output supplying a portion of the interface on the port in parallel with the remaining portion from the transaction source to the port, the output supplying a same portion of the interface as the portion to which the input is coupled from the transaction source; one or more registers configured to store one or more programmable limits that apply to transactions on the interface; and a control unit coupled to the one or more registers and coupled to at least the input and the output, and wherein the control unit is configured to communicate on the output to the port on behalf of the transaction source, and wherein the control unit is configured to limit issuance of transactions on the interface to the port responsive to the one or more programmable limits by controlling the output to the port, wherein transactions on the interface include an address of the data affected by the transaction and further include a transmission of the data.