2.2 BSP Rel. 1.0 for PPMC-275 Programmer's Guide

List of APIs API Call Reference
RETURN An END object pointer, or NULL on error.
LOCAL STATUS mgiUnload(DRV_CTRL *pDrvCtrl)
DESCRIPTION This function unloads the ethernet port END driver from the
MUX.
INPUT
DRV_CTRL
*pDrvCtrl
Pointer to DRV_CTRL structure
OUTPUT Driver memory allocated is freed.
Driver is disconnected from the MUX.
RETURN OK.
LOCAL STATUS memoryInit(DRV_CTRL *pDrvCtrl)
DESCRIPTION This function allocates the necessary memory space for the Tx/Rx
descriptors as well as Rx buffers. Both Tx/Rx descriptor memory
space and Rx buffers allocated using the malloc() routine
which defines this memory space cacheable as the low level driver
supports cacheable descriptors. This is done to allow better packet
process performance. The function assigns the Rx buffer memory
space to be the network pool cluster memory space which means
that the network pool clusters and the Gigabit Ethernet Controller
buffers are the same. This allow the zero copy in Rx where the Rx
data is placed into the network pool clusters with no copying. This
function also makes sure the descriptor and cluster addresses are
cache line size aligned in order to avoid data loss when
performing data cache flush or invalidate.
Tx/Rx
descriptors
After memory allocation the driver creates and initializes netBufLib,
the pool of mBlk and clBlk is created. The pool of clusters
is defined to be the Rx buffers. This way the driver can practice the
Zero Copy Buff methodology.
Call low level routine to create Tx descriptor data structure.
Call low level routine to create Rx descriptor data structure.
Assign each Rx descriptor with netBufLib cluster.
5 - 92 VxWorks 5.5/Tornado 2.2 BSP Rel. 1.0 for PPMC-275