Intel IXP400 manual IxDmaAcc Component Overview

Intel® IXP400 Software

Access-Layer Components: DMA Access Driver (IxDmaAcc) API

Figure 44. IxDmaAcc Component Overview

client		Client Callback
Setup	Uses	Callback
Hardware	IxDmaAcc
	+IxDmaAccInit()
	+IxDmaAccDmaTransfer()
	+IxDmaAccShow()
Uses	Uses		Uses
ixOsal	IxQMgr		IxDmaAccDescriptorManager
+ixOsalMutexInit()	+ixQmgrConfig()		+ixDmaAccDescriptorPoolInit()
+ixOsalMutexLock()
	+ixQMgrNotificationCallbackSet()		+ixDmaAccDescriptorGet()
+ixOsalMutexUnlock()
	+ixQMgrQRead()		+ixDmaAccDescriptorFree()
+ixOsalMutexDestroy()
	+ixQMgrQWrite()
+ixOsalLog()
			B2358-02

Note: IxDmaAcc components are in white.

Figure 44 shows the dependency between IxDmaAcc component and other external components (in grey). IxDmaAcc depends on:

•Client component using IxDmaAcc for DMA transfer access

•IxQMgr component for configuring and using the hardware queues to queue the DMA request and to get the ‘DMA done’ request status

•IxOSAL layer for mutual exclusion, error handling, and message log

Programmer’s Guide	IXP400 Software Version 2.0	April 2005
	Document Number: 252539, Revision: 007	117