sitara_depot/components/free_rtos/ethernet/eth_rx_flow.cpp

/*
 * eth_rx_flow.cpp
 *
 *  Created on: 7 <EFBFBD><EFBFBD><EFBFBD>. 2023 <EFBFBD>.
 *      Author: sychev
 */
#include "free_rtos/ethernet/eth_rx_flow.hpp"

#include <networking/enet/core/include/core/enet_soc.h>
#include <networking/enet/core/src/dma/udma/enet_udma_priv.h> // Yes, it is forbidden !
#include <networking/enet/utils/include/enet_board.h>
#include <networking/enet/utils/include/enet_appmemutils.h>
#include <networking/enet/utils/include/enet_appmemutils_cfg.h>
#include <networking/enet/utils/include/enet_apputils.h>

/*----------------------------------------------------------------------*/
/**
 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> sysconfig.
 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <build_name>/syscfg
 */
#include "ti_enet_config.h"
/*----------------------------------------------------------------------*/

using namespace free_rtos;

/**
 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
 */
void free_rtos::rxIsrHandler(void *appData)
{
    EthRxFlow * rx_flow = (EthRxFlow *)appData;

    if(rx_flow == nullptr) {
        return;
    }

    rx_flow->sem_[EthRxFlow::e_signalRxPkt].post();
}

void free_rtos::rxTaskHandler(void *appData)
{
    EthRxFlow * rx_flow = (EthRxFlow *)appData;
    if (rx_flow != nullptr) {
        rx_flow->rxProcessPktTask();
    }
}

free_rtos::EthRxFlow::EthRxFlow(TEthFrameMacAddr& mac_addr, EthStackIface& eth_stack) :
        mac_addr_{mac_addr},
        eth_stack_{eth_stack},
        passive_mode_{false}
{
    EnetQueue_initQ(&rx_free_pktq_);
}

void free_rtos::EthRxFlow::initRxFreePktQ(void * appPriv, EnetDma_PktQ * p_packet_queue, uint32_t qCount)
{
    EnetDma_PktQ rxReadyQ;
    EnetDma_Pkt *pPktInfo;
    uint32_t i;
    int32_t status;

    for (i = 0U; i < qCount; ++i)
    {
        pPktInfo = EnetMem_allocEthPkt(appPriv,
                                       ENET_MEM_LARGE_POOL_PKT_SIZE,
                                       ENETDMA_CACHELINE_ALIGNMENT);
        EnetAppUtils_assert(pPktInfo != NULL);

        ENET_UTILS_SET_PKT_APP_STATE(&pPktInfo->pktState, ENET_PKTSTATE_APP_WITH_FREEQ);

        EnetQueue_enq(p_packet_queue, &pPktInfo->node);
    }

    /* Retrieve any packets which are ready */
    EnetQueue_initQ(&rxReadyQ);

    status = EnetDma_retrieveRxPktQ(dma_handle_, &rxReadyQ);
    EnetAppUtils_assert(status == ENET_SOK);

    /* There should not be any packet with DMA during init */
    EnetAppUtils_assert(EnetQueue_getQCount(&rxReadyQ) == 0U);
}

void free_rtos::EthRxFlow::submitFreeRxPkts(uint32_t qCount)
{
    EnetDma_PktQ rxSubmitQ;
    EnetDma_Pkt* rxPktInfo = (EnetDma_Pkt *)EnetQueue_deq(&rx_free_pktq_);
    int32_t status;

    EnetQueue_initQ(&rxSubmitQ);

    while((qCount > 0) && (rxPktInfo != nullptr))
    {
        EnetQueue_enq(&rxSubmitQ, &rxPktInfo->node);

        rxPktInfo = (EnetDma_Pkt *)EnetQueue_deq(&rx_free_pktq_);
        qCount--;
    }

    EnetAppUtils_validatePacketState(&rxSubmitQ,
                                     ENET_PKTSTATE_APP_WITH_FREEQ,
                                     ENET_PKTSTATE_APP_WITH_DRIVER);

    status = EnetDma_submitRxPktQ(dma_handle_, &rxSubmitQ);
    EnetAppUtils_assert(status == ENET_SOK);

    qCount = EnetQueue_getQCount(&rxSubmitQ);
    /* Assert here, as during init, the number of DMA descriptors should be equal to
    * the number of free Ethernet buffers available with app */
    EnetAppUtils_assert(qCount == 0U);
}

void free_rtos::EthRxFlow::rxProcessPktTask()
{
    EnetDma_Pkt* rxPktInfo; /// <20><><EFBFBD><EFBFBD><EFBFBD> <20> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    EnetDma_PktQ rxReadyQ;
    uint32_t readyQCount;
    int32_t status;

    while(1)
    {
        if(enetDmaRxChId_ != ENET_DMA_RX_CH0) {
            status = sem_[e_signalRxPkt].pend();
        } else {
            status = sem_[e_signalRxPkt].pend(semaphore_timeout_ticks_);
        }

        if(status != SystemP_SUCCESS) {
            EnetAppUtils_print("RX Timeout ");

            continue;
        }

        do {
            EnetDma_PktQ rxFreeQ;

            EnetQueue_initQ(&rxFreeQ);

            status = EnetDma_retrieveRxPktQ(dma_handle_, &rxReadyQ);
            EnetAppUtils_assert(status == ENET_SOK);

            readyQCount = EnetQueue_getQCount(&rxReadyQ);

            if(readyQCount == 0) {
                break;
            }

            // Reload DMA with a new rx free queue as fast as possible
            submitFreeRxPkts(readyQCount);

            rxPktInfo = (EnetDma_Pkt *)EnetQueue_deq(&rxReadyQ);

            while(rxPktInfo != nullptr) {
                //if (!passive_mode_) {
                    for (int j = 0 ; j < rxPktInfo->sgList.numScatterSegments; ++j)
                    {
                        eth_stack_.rx_handler(rxPktInfo->sgList.list[j].bufPtr, rxPktInfo->sgList.list[j].segmentFilledLen);
                    }
                //}

                EnetQueue_enq(&rxFreeQ, &rxPktInfo->node);

                rxPktInfo = (EnetDma_Pkt *)EnetQueue_deq(&rxReadyQ);
            }

            EnetAppUtils_validatePacketState(&rxFreeQ,
                                             ENET_PKTSTATE_APP_WITH_DRIVER,
                                             ENET_PKTSTATE_APP_WITH_FREEQ);

            EnetQueue_append(&rx_free_pktq_, &rxFreeQ);
        } while(readyQCount > 0);
    }
}

bool free_rtos::EthRxFlow::open(uint32_t id, int32_t enetDmaRxChId, UBaseType_t task_priority, UBaseType_t task_stack_size)
{
    EnetApp_GetDmaHandleInArgs     rxInArgs;
    EnetApp_GetRxDmaHandleOutArgs  rxChInfo;

    constexpr uint32_t numPkts[2] = {ENET_DMA_RX_CH0_NUM_PKTS, ENET_DMA_RX_CH1_NUM_PKTS};

    EnetAppUtils_print("rx_flow %u: opening flow...\r\n", id);

    if (open_) {
        EnetAppUtils_print("rx_flow %u: rx flow is already open. Do nothing.\r\n", id_);
        return true;
    }

    if (!rx_task.Create("rx_task", task_priority, rxTaskHandler, this, task_stack_size))
    {
        EnetAppUtils_print("rx_flow %u: failed to create rx task.\r\n", id_);
        return false;
    }

    id_ = id;
    enetDmaRxChId_ = enetDmaRxChId;

    /// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    rxInArgs.notifyCb = rxIsrHandler;   /// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    rxInArgs.cbArg   = this;            /// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>

    EnetApp_getRxDmaHandle(enetDmaRxChId, &rxInArgs, &rxChInfo);

    /// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    rx_start_flow_idx_ = rxChInfo.rxFlowStartIdx;
    rx_flow_idx_ = rxChInfo.rxFlowIdx;
    dma_handle_ = rxChInfo.hRxCh;

    if (rxChInfo.macAddressValid)
    {
        EnetUtils_copyMacAddr(mac_addr_.bytes, rxChInfo.macAddr);
        mac_addr_.addr&= ETH_FRAME_MAC_ADDR_MASK;

        eth_stack_.set_mac_address(mac_addr_.addr);
    }

    /// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    EnetAppUtils_assert(rxChInfo.useGlobalEvt == true);
    EnetAppUtils_assert(rxChInfo.sizeThreshEn == 0U);
    EnetAppUtils_assert(rxChInfo.maxNumRxPkts >= numPkts[enetDmaRxChId]);
    EnetAppUtils_assert(rxChInfo.chIdx == id_);
    EnetAppUtils_assert(rxChInfo.useDefaultFlow == true);

    if (dma_handle_ == nullptr)
    {
        EnetAppUtils_print("rx_flow %u: failed to open rx dma flow\r\n", id_);
        EnetAppUtils_assert(dma_handle_ != nullptr);
        return false;
    }

    /// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    initRxFreePktQ(this, &rx_free_pktq_, numPkts[enetDmaRxChId]);
    submitFreeRxPkts(numPkts[enetDmaRxChId]/2);

    open_ = true;

    EnetAppUtils_print("rx_flow %u: rx flow open successfully\r\n", id);

    return true;
}