TMS320C6657: Ethernet Stack Lockup how to disable interrupts via HwiP_disable() in the emacEnqueueTx() function

panjiang weng

Part Number: TMS320C6657

Tool/software:

We have encountered a similar situation and would like to make such modifications for verification, but we are unsure about the specific steps. We haven't found any interrupt-related operations in the `emacEnqueueTx()` function. Could you please provide us with detailed operational steps? Thank you very much!

4 months ago

0 Betsy Varughese 4 months ago

TI__Expert 4490 points

Hi,

Can you try the following:

1. Include the "HWiP.h" header file : #include <ti/osal/HwiP.h>

2. Modify the code as follows,

uintptr_t key;

//Disable the interrupt
key = HwiP_disable();

//Existing Code/Test Code

//Restore the interrupt
HwiP_restore(key);

For your reference, suggest you to go through the header file "HwiP.h" located at "pdk_c665x_2_0_16/packages/ti/osal/HwiP.h"

Best Regards,

Betsy Varughese

0 panjiang weng 3 months ago in reply to Betsy Varughese

Prodigy 30 points

Hi，Betsy Varughese

Thank you very much for your prompt reply. I will verify it as soon as possible and hope it can be effective in my project.

Best Regards

0 Betsy Varughese 3 months ago in reply to panjiang weng

TI__Expert 4490 points

Hi,

Please check from your end and let me know.

Regards,

Betsy Varughese

0 panjiang weng 3 months ago in reply to Betsy Varughese

Prodigy 30 points

Hi,I am very pleased to share my latest progress with you. Although I did not perform verification according to such modifications, inspired by this solution, we found anomalies when inspecting the NIMU driver code. We use a third-party solution and code, and they added the following code to the NIMU driver code. After our verification, this is the root cause.

I would like to express my sincere gratitude to you again.

I also want to remind others who encounter similar problems: first, be sure to use official EVMs and related example routines; second, if you use third-party code, you must compare it with the official code to find differences.

static EMAC_DRV_ERR_E
EmacSendPkt
(
    EMAC_DATA*      ptr_pvt_data
)
{
    PBM_Handle hPkt;
    EMAC_DRV_ERR_E emac_send_status;
    register UINT8*     buffer;
    register uint       length;
    EMAC_PKT_DESC_T     pkt_desc;
    EMAC_PKT_QUEUE_T    *pq;
    EMAC_Pkt *pPktHdr;

    /* Checking for any queued packets to be transmitted */

    /* First check the Raw Packet Tx Queue. If there are any
    * pending packets in this queue, always transmit them
    * first over the IP packets.
    */
    hPkt = PBMQ_deq(&ptr_pvt_data->pdi.PBMQ_rawtx);

    /* Check if no raw packet to transmit and if any
    * IP packet to transmit. If no raw or IP packets to
    * transmit, set the "Transmitter Free" TxFree
    * flag for this device to 1.
    */
    if( !hPkt && !(hPkt = PBMQ_deq(&ptr_pvt_data->pdi.PBMQ_tx)) )
    {
        return EMAC_DRV_RESULT_SEND_ERR;
    }

    buffer = (Uint8 *)Convert_CoreLocal2GlobalAddr((uint32_t)(PBM_getDataBuffer(hPkt))) + PBM_getDataOffset(hPkt);
    length = PBM_getBufferLen(hPkt);

    /* Clean the cache for external addesses */
    if( ((UINT32)buffer & EMAC_EXTMEM) || ((UINT32)buffer & EMAC_MSMCMEM) )
        OEMCacheClean( (void *)buffer, length );

    pkt_desc.AppPrivate  = (Uint32)hPkt;
    pkt_desc.pPrev       = NULL;
    pkt_desc.pNext       = NULL;
    pkt_desc.pDataBuffer = (Uint8 *)Convert_CoreLocal2GlobalAddr((uint32_t)(PBM_getDataBuffer(hPkt)));
    pkt_desc.BufferLen   = PBM_getBufferLen(hPkt);
    pkt_desc.Flags       = EMAC_PKT_FLAG_SOP | EMAC_PKT_FLAG_EOP;
    pkt_desc.ValidLen    = PBM_getValidLen(hPkt);
    pkt_desc.DataOffset  = PBM_getDataOffset(hPkt);
    pkt_desc.PktChannel  = coreNum;
    pkt_desc.PktLength   = PBM_getValidLen(hPkt);
    pkt_desc.PktFrags    = 1;

    /*This piece of code is both the root cause and the key difference. 
    // while(1) {
    //     pq = (EMAC_PKT_QUEUE_T *)&EMAC_TX_QUEUE(NIMU_PORT_NUM_USED);
    //     pPktHdr = pq->pHead;
    //     if(pPktHdr)
    //         break;
    // }
    

    emac_send_status = emac_send(NIMU_PORT_NUM_USED, &pkt_desc);
    return emac_send_status;
}

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TMS320C6657: Ethernet Stack Lockup how to disable interrupts via HwiP_disable() in the emacEnqueueTx() function