关于SGMII通信的问题

你好，Allen！

感谢你的回复，关于你说的包的兼容性，我不是很理解，你的意思难道是因为包的兼容性而导致了只能收到部分数据？至于发送函数我直接使用的是例程里的

SendPacket ()函数，只是将其参数添加为发数的源地址，即SendPacket (sendbuf) ，在该函数里通过DMA搬移到pktMatch中，其它都一样，请问该怎么改，我实在没地方下手。发送端的源代码如下：

Int32 SendPacket (Void)
{
Cppi_Desc* pCppiDesc;
UInt32 dataBufferSize;
char psFlags = (cpswSimTest)?pa_EMAC_PORT_0:pa_EMAC_PORT_1;

/* Get a free descriptor from the global free queue we setup
* during initialization.
*/
if ((pCppiDesc = Qmss_queuePop (gTxFreeQHnd)) == NULL)
{
System_printf ("No Tx free descriptor. Cant run send/rcv test \n");
return -1;
}

/* The descriptor address returned from the hardware has the
* descriptor size appended to the address in the last 4 bits.
*
* To get the true descriptor size, always mask off the last
* 4 bits of the address.
*/
pCppiDesc = (Ptr) ((UInt32) pCppiDesc & 0xFFFFFFF0);

dataBufferSize = sizeof (pktMatch);
Cppi_setData ( Cppi_DescType_HOST,
(Cppi_Desc *) pCppiDesc,
(UInt8 *) Convert_CoreLocal2GlobalAddr((UInt32)pktMatch),
dataBufferSize
);
Cppi_setPacketLen (Cppi_DescType_HOST, (Cppi_Desc *)pCppiDesc, dataBufferSize);

if (cpswLpbkMode != CPSW_LOOPBACK_NONE)
{
/* Force the packet to the specific EMAC port if loopback is enabled */
Cppi_setPSFlags(Cppi_DescType_HOST, (Cppi_Desc *)pCppiDesc, psFlags);
}
else
{
Cppi_setPSFlags(Cppi_DescType_HOST, (Cppi_Desc *)pCppiDesc, 0);
}

/* Send the packet out the mac. It will loop back to PA if the mac/switch
* have been configured properly
*/
Qmss_queuePush (gPaTxQHnd[8], pCppiDesc, dataBufferSize, SIZE_HOST_DESC, Qmss_Location_TAIL);

/* Increment the application transmit counter */
gTxCounter ++;

/* Give some time for the PA to process the packet */
CycleDelay (10000);

return 0;
}

至于接收端，由于它采用中断服务函数Cpsw_RxISR（）来接收数据，也只是在该函数中添加了DMA搬移的函数，源代码如下：

Void Cpsw_RxISR (Void)
{
Cppi_Desc* pCppiDesc;
UInt32 count, i;

/* Process ISR.
*
* Get the number of entries in accumulator list.
* The hardware enqueues data alternatively to Ping/Pong buffer lists in
* the accumulator. Hence, we need to track which list (Ping/Pong)
* we serviced the last time and accordingly process the other one
* this time around.
*/
if (!gIsPingListUsed)
{
/* Serviced Pong list last time. So read off the Ping list now */
count = gHiPriAccumList[0];
}
else
{
/* Serviced Ping list last time. So read off the Pong list now */
count = gHiPriAccumList[RX_INT_THRESHOLD + 1];
}

/* Process all the Results received
*
* Skip the first entry in the list that contains the
* entry count and proceed processing results.
*/
for (i = 1; i <= count; i ++)
{
/* Get the result descriptor.
*
* The hardware enqueues data alternatively to Ping/Pong buffer lists in
* the accumulator. Hence, we need to track which list (Ping/Pong)
* we serviced the last time and accordingly process the other one
* this time around.
*/
if (!gIsPingListUsed)
{
/* Serviced Pong list last time. So read off the Ping list now */
pCppiDesc = (Cppi_Desc *) gHiPriAccumList [i];
}
else
{
/* Serviced Ping list last time. So read off the Pong list now
*
* Skip over Ping list length to arrive at Pong list start.
*/
pCppiDesc = (Cppi_Desc *) gHiPriAccumList [i + RX_INT_THRESHOLD + 1];
}

/* Descriptor size appended to the address in the last 4 bits.
*
* To get the true descriptor size, always mask off the last
* 4 bits of the address.
*/
pCppiDesc = (Ptr) ((UInt32) pCppiDesc & 0xFFFFFFF0);

VerifyPacket (pCppiDesc);
}

/* Clear the accumulator list and save whether we used Ping/Pong
* list information for next time around.
*/
if (!gIsPingListUsed)
{
/* Just processed Ping list */
gIsPingListUsed = 1;

/* Clear the accumulator list after processing */
memset ((Void *) &gHiPriAccumList [0], 0, sizeof (UInt32) * (RX_INT_THRESHOLD + 1));
}
else
{
/* Just processed Pong list */
gIsPingListUsed = 0;

/* Clear the accumulator list after processing */
memset ((Void *) &gHiPriAccumList[RX_INT_THRESHOLD + 1], 0, sizeof (UInt32) * (RX_INT_THRESHOLD + 1));
}

/* Clear INTD */
Qmss_ackInterrupt(PA_ACC_CHANNEL_NUM, 1);
Qmss_setEoiVector(Qmss_IntdInterruptType_HIGH, PA_ACC_CHANNEL_NUM);

/* Done processing interrupt. Return */
return;
}

本人看来看去还是发现不了与之有关的部分，麻烦你帮我看下，万分感谢！

Shi