Intel IXP400 manual Access-Layer Components Queue Manager IxQMgr API, What’s New

	Intel® IXP400 Software
Access-Layer Components:	18
Queue Manager (IxQMgr) API

This chapter describes the Intel® IXP400 Software v2.0’s “Queue Manager API” access-layer component.

18.1What’s New

There are no changes or enhancements to this component in software release 2.0.

18.2Overview

The IxQMgr (Queue Manager) access-layer component is a collection of software services responsible for configuring the Advanced High-Performance Bus (AHB) Queue Manager (also referred to by the combined acronym AQM). IxQMgr is also responsible for managing the flow of IX_OSAL_MBUF buffer pointers to and from the NPEs and client Intel XScale® Core software. To do this, the IxQMgr API provides a low-level interface to the AQM hardware block of the Intel® IXP4XX product line and IXC1100 control plane processors. Other access-layer components can then use IxQMgr to pass and receive data to and from the NPEs through the AQM.

This chapter presents the necessary steps to start the IxQMgr component. A high-level overview of AQM functions is also provided. The IxQMgr component acts as a pseudo service layer to other access-layer components such as IxEthAcc.

In the sections that describe how the Queue Manager works, the “client” is an access component such as IxEthAcc. Application programmers will only need to write code for the initialization and uninitialization of the IxQMgr component, not for directly controlling the queues and the AQM.

Programmer’s Guide	IXP400 Software Version 2.0	April 2005
	Document Number: 252539, Revision: 007	265