Hi !!
I have been working to establish how to implement checksum verification on ingress packets in the PA_emac ARM example.
i looked at multiple unit tests mainly the test-3 (from which i found how to implement checksum on egress) & test-5 to develop my own version for ingress but i wasn't able to silently discard packets with incorrect checksum.
below is my code that i was using (but failed) inside the setup_pass() function
int32_t PA_RXconfig (void)
{
int32_t j;
uint16_t cmdSize;
paCmdReply_t cmdReplyInfo = { pa_DEST_HOST, /* Replies go to the host */
0, /* User chosen ID to go to swinfo0 */
0, /* Destination queue */
0 /* Flow ID */
};
paReturn_t retVal;
paEntryHandle_t retHandle;
int32_t handleType, cmdDest;
uint32_t psCmd = ((uint32_t)(4 << 5) << 24);
Cppi_HostDesc* pHostDesc;
paReturn_t *paret;
paCmdInfo_t CmdSet_RX;
/* Get a Tx free descriptor to send a command to the PA PDSP */
if ((pHostDesc = Qmss_queuePop (gTxFreeQHnd)) == NULL)
{
UART_printf ("Error obtaining a Tx free descriptor \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 pointer, always mask off the last
* 4 bits of the address.
*/
pHostDesc = (Ptr) ((uint32_t) pHostDesc & 0xFFFFFFF0);
VerifyPktErrCmd1.queue = Qmss_getQIDFromHandle(gRxQHnd);
VerifyPktErrCmd1.flowId = (uint8_t)Cppi_getFlowId(gRxFlowHnd);
CmdSet_RX.params.verifyPktErr = VerifyPktErrCmd1;
cmdSize = pHostDesc->buffLen;
*paret= Pa_configCmdSet (gPAInstHnd,
2,
1,
&CmdSet_RX,
(paCmd_t) pHostDesc->buffPtr,
&cmdSize,
&cmdReplyInfo,
&cmdDest);
/* Set the buffer length to the size used. It will be restored when the descriptor
* is returned
*/
Cppi_setPacketLen (Cppi_DescType_HOST, (Cppi_Desc *)pHostDesc, cmdSize);
pHostDesc->buffLen = cmdSize;
/* Mark the packet as a configuration packet */
Cppi_setPSData (Cppi_DescType_HOST, (Cppi_Desc *)pHostDesc, (uint8_t *)&psCmd, 4);
/* Send the command to the PA and wait for the return */
Qmss_queuePush (gPaTxQHnd[cmdDest],
(uint32_t *)Convert_CoreLocal2GlobalAddr((uint32_t)pHostDesc),
pHostDesc->buffLen,
SIZE_HOST_DESC,
Qmss_Location_TAIL
);
return 0;
}
what might me the problem here? also is there a way that i can utilize the CPPI Error Flags to silently discard packets?
also i would like to know that is CRC verification done in the PA_EMAC example by default?
regards,
Hannan
