int wlan_eth_dma_init() {
int status;
int bd_count;
int i;
u32 buf_addr;
XAxiDma_Config *ETH_A_DMA_CFG_ptr;
XAxiDma_Bd ETH_DMA_BD_Template;
XAxiDma_BdRing *ETH_A_TxRing_ptr;
XAxiDma_BdRing *ETH_A_RxRing_ptr;
XAxiDma_Bd *first_bd_ptr;
XAxiDma_Bd *cur_bd_ptr;
packet_bd_list checkout;
packet_bd* tx_queue;
ETH_A_DMA_CFG_ptr = XAxiDma_LookupConfig(ETH_A_DMA_DEV_ID);
status = XAxiDma_CfgInitialize(Ð_A_DMA_Instance, ETH_A_DMA_CFG_ptr);
if(status != XST_SUCCESS) {xil_printf("Error in XAxiDma_CfgInitialize! Err = %d\n", status); return -1;}
//Zero-out the template buffer descriptor
XAxiDma_BdClear(Ð_DMA_BD_Template);
//Fetch handles to the Tx and Rx BD rings
ETH_A_TxRing_ptr = XAxiDma_GetTxRing(Ð_A_DMA_Instance);
ETH_A_RxRing_ptr = XAxiDma_GetRxRing(Ð_A_DMA_Instance);
//Disable all Tx/Rx DMA interrupts
XAxiDma_BdRingIntDisable(ETH_A_TxRing_ptr, XAXIDMA_IRQ_ALL_MASK);
XAxiDma_BdRingIntDisable(ETH_A_RxRing_ptr, XAXIDMA_IRQ_ALL_MASK);
//Disable delays and coalescing (for now - these will be useful when we transition to interrupts)
XAxiDma_BdRingSetCoalesce(ETH_A_TxRing_ptr, 1, 0);
XAxiDma_BdRingSetCoalesce(ETH_A_RxRing_ptr, 1, 0);
//Setup Tx/Rx buffer descriptor rings in memory
status = XAxiDma_BdRingCreate(ETH_A_TxRing_ptr, ETH_A_TX_BD_SPACE_BASE, ETH_A_TX_BD_SPACE_BASE, XAXIDMA_BD_MINIMUM_ALIGNMENT, ETH_A_NUM_TX_BD);
status |= XAxiDma_BdRingCreate(ETH_A_RxRing_ptr, ETH_A_RX_BD_SPACE_BASE, ETH_A_RX_BD_SPACE_BASE, XAXIDMA_BD_MINIMUM_ALIGNMENT, ETH_A_NUM_RX_BD);
if(status != XST_SUCCESS) {xil_printf("Error creating DMA BD Rings! Err = %d\n", status); return -1;}
//Populate each ring with empty buffer descriptors
status = XAxiDma_BdRingClone(ETH_A_TxRing_ptr, Ð_DMA_BD_Template);
status |= XAxiDma_BdRingClone(ETH_A_RxRing_ptr, Ð_DMA_BD_Template);
if(status != XST_SUCCESS) {xil_printf("Error in XAxiDma_BdRingClone()! Err = %d\n", status); return -1;}
//Start the DMA Tx channel
// No Eth packets are transmitted until actual Tx BD's are pushed to the DMA hardware
status = XAxiDma_BdRingStart(ETH_A_TxRing_ptr);
//Initialize the Rx buffer descriptors
bd_count = XAxiDma_BdRingGetFreeCnt(ETH_A_RxRing_ptr);
if(bd_count != ETH_A_NUM_RX_BD) {xil_printf("Error in Eth Rx DMA init - not all Rx BDs were free at boot\n");}
status = XAxiDma_BdRingAlloc(ETH_A_RxRing_ptr, bd_count, &first_bd_ptr);
if(status != XST_SUCCESS) {xil_printf("Error in XAxiDma_BdRingAlloc()! Err = %d\n", status); return -1;}
//Checkout ETH_A_NUM_RX_BD packet_bds
queue_checkout(&checkout, ETH_A_NUM_RX_BD);
if(checkout.length == ETH_A_NUM_RX_BD){
tx_queue = checkout.first;
} else {
xil_printf("Error during wlan_eth_dma_init: able to check out %d of %d packet_bds\n", checkout.length, ETH_A_NUM_RX_BD);
return -1;
}
//Iterate over each Rx buffer descriptor
cur_bd_ptr = first_bd_ptr;
for(i = 0; i < bd_count; i++) {
//Set the memory address for this BD's buffer
buf_addr = (u32)((void*)((tx_packet_buffer*)(tx_queue->buf_ptr))->frame + sizeof(mac_header_80211) + sizeof(llc_header) - sizeof(ethernet_header));
status = XAxiDma_BdSetBufAddr(cur_bd_ptr, buf_addr);
if(status != XST_SUCCESS) {xil_printf("XAxiDma_BdSetBufAddr failed (bd %d, addr 0x08x)! Err = %d\n", i, buf_addr, status); return -1;}
//Set every Rx BD to max length (this assures 1 BD per Rx pkt)
status = XAxiDma_BdSetLength(cur_bd_ptr, ETH_A_PKT_BUF_SIZE, ETH_A_RxRing_ptr->MaxTransferLen);
if(status != XST_SUCCESS) {xil_printf("XAxiDma_BdSetLength failed (bd %d, addr 0x08x)! Err = %d\n", i, buf_addr, status); return -1;}
//Rx BD's don't need control flags before use; DMA populates these post-Rx
XAxiDma_BdSetCtrl(cur_bd_ptr, 0);
//BD ID is arbitrary; use pointer to the packet_bd associated with this BD
XAxiDma_BdSetId(cur_bd_ptr, (u32)tx_queue);
//Update cur_bd_ptr to the next BD in the chain for the next iteration
cur_bd_ptr = XAxiDma_BdRingNext(ETH_A_RxRing_ptr, cur_bd_ptr);
//Traverse forward in the checked-out packet_bd list
tx_queue = tx_queue->next;
}
//Push the Rx BD ring to hardware and start receiving
status = XAxiDma_BdRingToHw(ETH_A_RxRing_ptr, bd_count, first_bd_ptr);
//Enable Interrupts
XAxiDma_BdRingIntEnable(ETH_A_RxRing_ptr, XAXIDMA_IRQ_ALL_MASK);
status |= XAxiDma_BdRingStart(ETH_A_RxRing_ptr);
if(status != XST_SUCCESS) {xil_printf("Error in XAxiDma_BdRingToHw/XAxiDma_BdRingStart(ETH_A_RxRing_ptr)! Err = %d\n", status); return -1;}
return 0;
}
/*
*
* This function sets up the TX channel of a DMA engine to be ready for packet
* transmission.
*
* @param AxiDmaInstPtr is the pointer to the instance of the DMA engine.
*
* @return - XST_SUCCESS if the setup is successful.
* - XST_FAILURE otherwise.
*
* @note None.
*
******************************************************************************/
static int TxSetup(XAxiDma * AxiDmaInstPtr)
{
XAxiDma_BdRing *TxRingPtr = XAxiDma_GetTxRing(&AxiDma);
XAxiDma_Bd BdTemplate;
int Status;
u32 BdCount;
u32 TxBdSpacePtr = TX_BD_SPACE_BASE;
/* Disable all TX interrupts before TxBD space setup */
XAxiDma_BdRingIntDisable(TxRingPtr, XAXIDMA_IRQ_ALL_MASK);
/* Setup TxBD space */
BdCount = XAxiDma_BdRingCntCalc(XAXIDMA_BD_MINIMUM_ALIGNMENT,
(u32)TX_BD_SPACE_HIGH - (u32)TX_BD_SPACE_BASE + 1);
Status = XAxiDma_BdRingCreate(TxRingPtr, TxBdSpacePtr,
TxBdSpacePtr,
XAXIDMA_BD_MINIMUM_ALIGNMENT, BdCount);
if (Status != XST_SUCCESS) {
xil_printf("Failed create BD ring\r\n");
return XST_FAILURE;
}
/*
* Like the RxBD space, we create a template and set all BDs to be the
* same as the template. The sender has to set up the BDs as needed.
*/
XAxiDma_BdClear(&BdTemplate);
Status = XAxiDma_BdRingClone(TxRingPtr, &BdTemplate);
if (Status != XST_SUCCESS) {
xil_printf("Failed clone BDs\r\n");
return XST_FAILURE;
}
/*
* Set the coalescing threshold, so only one transmit interrupt
* occurs for this example
*
* If you would like to have multiple interrupts to happen, change
* the COALESCING_COUNT to be a smaller value
*/
Status = XAxiDma_BdRingSetCoalesce(TxRingPtr, COALESCING_COUNT,
DELAY_TIMER_COUNT);
if (Status != XST_SUCCESS) {
xil_printf("Failed set coalescing"
" %d/%d\r\n",COALESCING_COUNT, DELAY_TIMER_COUNT);
return XST_FAILURE;
}
/* Enable all TX interrupts */
XAxiDma_BdRingIntEnable(TxRingPtr, XAXIDMA_IRQ_ALL_MASK);
/* Start the TX channel */
Status = XAxiDma_UpdateBdRingCDesc(TxRingPtr);
if (Status != XST_SUCCESS) {
xil_printf("Failed bd start %x\r\n", Status);
return XST_FAILURE;
}
Status = XAxiDma_StartBdRingHw(TxRingPtr);
if (Status != XST_SUCCESS) {
xil_printf("Failed bd start %x\r\n", Status);
return XST_FAILURE;
}
return XST_SUCCESS;
}
/*
*
* This function sets up RX channel of the DMA engine to be ready for packet
* reception
*
* @param AxiDmaInstPtr is the pointer to the instance of the DMA engine.
*
* @return - XST_SUCCESS if the setup is successful.
* - XST_FAILURE if fails.
*
* @note None.
*
******************************************************************************/
static int RxSetup(XAxiDma * AxiDmaInstPtr)
{
XAxiDma_BdRing *RxRingPtr;
int Status;
XAxiDma_Bd BdTemplate;
XAxiDma_Bd *BdPtr;
XAxiDma_Bd *BdCurPtr;
int BdCount;
int FreeBdCount;
u32 RxBufferPtr;
u32 RxBdSpacePtr;
int Index;
int RingIndex;
RxBufferPtr = RX_BUFFER_BASE;
RxBdSpacePtr = RX_BD_SPACE_BASE;
for (RingIndex = 0;
RingIndex < AxiDmaInstPtr->RxNumChannels; RingIndex++) {
RxRingPtr = XAxiDma_GetRxIndexRing(&AxiDma, RingIndex);
/* Disable all RX interrupts before RxBD space setup */
XAxiDma_BdRingIntDisable(RxRingPtr,
XAXIDMA_IRQ_ALL_MASK);
/* Setup Rx BD space */
BdCount = XAxiDma_BdRingCntCalc(XAXIDMA_BD_MINIMUM_ALIGNMENT,
RX_BD_SPACE_HIGH - RX_BD_SPACE_BASE + 1);
Status = XAxiDma_BdRingCreate(RxRingPtr,
RxBdSpacePtr,
RxBdSpacePtr,
XAXIDMA_BD_MINIMUM_ALIGNMENT,
BdCount);
if (Status != XST_SUCCESS) {
xil_printf("Rx bd create failed with %d\r\n",
Status);
return XST_FAILURE;
}
/*
* Setup a BD template for the Rx channel. Then copy it
* to every RX BD.
*/
XAxiDma_BdClear(&BdTemplate);
Status = XAxiDma_BdRingClone(RxRingPtr,
&BdTemplate);
if (Status != XST_SUCCESS) {
xil_printf("Rx bd clone failed with %d\r\n",
Status);
return XST_FAILURE;
}
/* Attach buffers to RxBD ring so we are ready to receive packets */
FreeBdCount = XAxiDma_BdRingGetFreeCnt(RxRingPtr);
Status = XAxiDma_BdRingAlloc(RxRingPtr,
FreeBdCount, &BdPtr);
if (Status != XST_SUCCESS) {
xil_printf("Rx bd alloc failed with %d\r\n",
Status);
return XST_FAILURE;
}
BdCurPtr = BdPtr;
for (Index = 0; Index < FreeBdCount; Index++) {
Status = XAxiDma_BdSetBufAddr(BdCurPtr, RxBufferPtr);
if (Status != XST_SUCCESS) {
xil_printf("Rx set buffer addr %x on BD %x failed %d\r\n",
(unsigned int)RxBufferPtr,
(unsigned int)BdCurPtr, Status);
return XST_FAILURE;
}
Status = XAxiDma_BdSetLength(BdCurPtr, HSIZE,
RxRingPtr->MaxTransferLen);
if (Status != XST_SUCCESS) {
xil_printf("Rx set length %d on BD %x failed %d\r\n",
MAX_PKT_LEN, (unsigned int)BdCurPtr, Status);
return XST_FAILURE;
}
/* Receive BDs do not need to set anything for the control
* The hardware will set the SOF/EOF bits per stream status
*/
XAxiDma_BdSetCtrl(BdCurPtr, 0);
XAxiDma_BdSetId(BdCurPtr, RxBufferPtr);
XAxiDma_BdSetARCache(BdCurPtr, ARCACHE);
XAxiDma_BdSetARUser(BdCurPtr, ARUSER);
XAxiDma_BdSetVSize(BdCurPtr, VSIZE);
XAxiDma_BdSetStride(BdCurPtr, STRIDE);
RxBufferPtr += MAX_PKT_LEN;
BdCurPtr = XAxiDma_BdRingNext(RxRingPtr, BdCurPtr);
}
/*
* Set the coalescing threshold, so only one receive interrupt
* occurs for this example
*
* If you would like to have multiple interrupts to happen, change
* the COALESCING_COUNT to be a smaller value
*/
Status = XAxiDma_BdRingSetCoalesce(RxRingPtr, COALESCING_COUNT,
DELAY_TIMER_COUNT);
if (Status != XST_SUCCESS) {
xil_printf("Rx set coalesce failed with %d\r\n", Status);
return XST_FAILURE;
}
Status = XAxiDma_BdRingToHw(RxRingPtr, FreeBdCount, BdPtr);
if (Status != XST_SUCCESS) {
xil_printf("Rx ToHw failed with %d\r\n", Status);
return XST_FAILURE;
}
/* Enable all RX interrupts */
XAxiDma_BdRingIntEnable(RxRingPtr, XAXIDMA_IRQ_ALL_MASK);
/* Start RX DMA channel */
Status = XAxiDma_UpdateBdRingCDesc(RxRingPtr);
if (Status != XST_SUCCESS) {
xil_printf("Failed bd start %x\r\n", Status);
return XST_FAILURE;
}
RxBdSpacePtr += BdCount * sizeof(XAxiDma_Bd);
}
for (RingIndex = 0;
RingIndex < AxiDmaInstPtr->RxNumChannels; RingIndex++) {
RxRingPtr = XAxiDma_GetRxIndexRing(&AxiDma, RingIndex);
Status = XAxiDma_StartBdRingHw(RxRingPtr);
if (Status != XST_SUCCESS) {
xil_printf("Rx start BD ring failed with %d\r\n", Status);
return XST_FAILURE;
}
}
return XST_SUCCESS;
}
/**
*
* This example sends and receives a single packet in loopback mode with
* extended VLAN support.
*
* The transmit frame will have VLAN field populated.
*
* On receive, HW should pass the VLAN field to receive BDs.
*
* @param AxiEthernetInstancePtr is a pointer to the instance of the
* AxiEthernet component.
* @param DmaInstancePtr is a pointer to the instance of the Dma
* component.
*
* @return -XST_SUCCESS to indicate success.
* -XST_FAILURE to indicate failure.
*
* @note Summary of VLAN tags handling in this example
*
* Frame setup with Tpid1+Cfi1+TxPid => 0x88A83111
* Frame translated to TxTransVid => 0x88A83222
* Frame tagged to Tpid2+Cfi2+TxTagVid => 0x9100C333 + 0x88A83222
* Frame sent and loopbacked.
*
* Frame stripped with RxStrpVid(0x333) => 0x88A83222
* Frame translated (key:RxVid:0x222) RxTransVid => 0x88A83444
*
******************************************************************************/
int AxiEthernetSgDmaIntrExtVlanExample(XAxiEthernet *AxiEthernetInstancePtr,
XAxiDma *DmaInstancePtr)
{
int Status;
u32 TxFrameLength;
u32 RxFrameLength;
int PayloadSize = PAYLOAD_SIZE;
u16 Tpid1 = 0x88A8;
u16 Tpid2 = 0x9100;
u8 Cfi1 = 0x03;
u8 Cfi2 = 0x0C;
u16 TxVid = 0x0111;
u16 TxTransVid = 0x0222;
u16 TxTagVid = 0x0333;
u16 RxVid = 0x0222;
u16 RxTransVid = 0x0444;
u16 RxStrpVid = 0x0333;
u32 VTagCfiVid;
u16 RxCfiVid;
u16 RxTpid;
u32 RxStatusControlWord;
int Valid;
XAxiDma_BdRing *RxRingPtr = XAxiDma_GetRxRing(DmaInstancePtr);
XAxiDma_BdRing *TxRingPtr = XAxiDma_GetTxRing(DmaInstancePtr);
XAxiDma_Bd *BdPtr;
XAxiDma_Bd *BdCurPtr;
u32 BdSts;
/*
* Cannot run this example if extended features support is not enabled
*/
if (!(XAxiEthernet_IsTxVlanTran(AxiEthernetInstancePtr) &&
XAxiEthernet_IsTxVlanStrp(AxiEthernetInstancePtr) &&
XAxiEthernet_IsTxVlanTag(AxiEthernetInstancePtr) &&
XAxiEthernet_IsRxVlanTran(AxiEthernetInstancePtr) &&
XAxiEthernet_IsRxVlanStrp(AxiEthernetInstancePtr) &&
XAxiEthernet_IsRxVlanTag(AxiEthernetInstancePtr))) {
AxiEthernetUtilErrorTrap("Extended VLAN not available");
return XST_FAILURE;
}
/*
* Clear variables shared with callbacks
*/
FramesRx = 0;
FramesTx = 0;
DeviceErrors = 0;
memset(RxFrame,0,sizeof(RxFrame));
memset(TxFrame,0,sizeof(TxFrame));
/*
* Calculate frame length (not including FCS) plus one VLAN tag
*/
TxFrameLength = XAE_HDR_VLAN_SIZE + PayloadSize;
/*
* Setup the packet with one VALN tag = VtagCfiVid to be transmitted
* initially.
*/
VTagCfiVid = (((u32)Tpid1 << 16) | ((u32)Cfi1 << 12) | TxVid);
AxiEthernetUtilFrameMemClear(&TxFrame);
AxiEthernetUtilFrameHdrFormatMAC(&TxFrame, AxiEthernetMAC);
AxiEthernetUtilFrameHdrVlanFormatVid(&TxFrame, 0, VTagCfiVid);
AxiEthernetUtilFrameHdrVlanFormatType(&TxFrame, PayloadSize, 1);
AxiEthernetUtilFrameSetVlanPayloadData(&TxFrame, PayloadSize, 1);
/* Intended VLAN setup:
* TX translation and tagging. RX stripping and translation.
*
* Frame setup with Tpid1+Cfi1+TxPid => 0x88A83111
* Frame translated to TxTransVid => 0x88A83222
* Frame tagged to Tpid2+Cfi2+TxTagVid => 0x9100C333 + 0x88A83222
* Frame sent and loopbacked.
*
* Frame stripped with RxStrpVid(0x333) => 0x88A83222
* Frame translated (key:RxVid:0x222) RxTransVid => 0x88A83444
*/
/* Extended VLAN transmit side. Stripping->Translation->Tagging */
/*
* Configure VLAN TX tag mode, set to XAE_VTAG_SELECT.
*/
Status = XAxiEthernet_SetOptions(AxiEthernetInstancePtr,
XAE_EXT_TXVLAN_TAG_OPTION);
Status |= XAxiEthernet_SetVTagMode(AxiEthernetInstancePtr,
XAE_VTAG_SELECT, XAE_TX);
/*
* TX VLAN translation from TxVid to TxTransVid and enable tagging.
*/
Status |= XAxiEthernet_SetOptions(AxiEthernetInstancePtr,
XAE_EXT_TXVLAN_TRAN_OPTION);
Status |= XAxiEthernet_SetVidTable(AxiEthernetInstancePtr, TxVid,
TxTransVid,0, 1, XAE_TX);
/*
* TX VLAN tagging is keyed on TxVid to add one additional tag based
* on register XAE_TTAG_OFFSET value.
*/
VTagCfiVid = (((u32)Tpid2 << 16) | ((u32)Cfi2 << 12) | TxTagVid);
Status |= XAxiEthernet_SetVTagValue(AxiEthernetInstancePtr,
VTagCfiVid, XAE_TX);
if (Status != XST_SUCCESS) {
AxiEthernetUtilErrorTrap("Error setting TX VLAN");
return XST_FAILURE;
}
/* Extended VLAN receive side. Stripping->Translation->Tagging */
/*
* Configure VLAN RX strip mode, set to XAE_VSTRP_SELECT.
*/
Status = XAxiEthernet_SetOptions(AxiEthernetInstancePtr,
XAE_EXT_RXVLAN_STRP_OPTION);
Status |= XAxiEthernet_SetVStripMode(AxiEthernetInstancePtr,
XAE_VSTRP_SELECT, XAE_RX);
/*
* RX VLAN strips based on RxStrpVid and enable stripping.
*/
Status |= XAxiEthernet_SetVidTable(AxiEthernetInstancePtr, RxStrpVid,
RxStrpVid, 1, 0, XAE_RX);
/*
* RX VLAN translation from RxVid to RxTransVid only.
*/
Status |= XAxiEthernet_SetOptions(AxiEthernetInstancePtr,
XAE_EXT_RXVLAN_TRAN_OPTION);
Status |= XAxiEthernet_SetVidTable(AxiEthernetInstancePtr, RxVid,
RxTransVid, 0, 0, XAE_RX);
if (Status != XST_SUCCESS) {
AxiEthernetUtilErrorTrap("Error setting RX VLAN");
return XST_FAILURE;
}
/* Configure VLAN TPIDs for HW to recognize. */
Status = XAxiEthernet_SetTpid(AxiEthernetInstancePtr, Tpid1, 0);
Status |= XAxiEthernet_SetTpid(AxiEthernetInstancePtr, Tpid2, 1);
if (Status != XST_SUCCESS) {
AxiEthernetUtilErrorTrap("Error setting TPIDs");
return XST_FAILURE;
}
/*
* Flush the TX frame before giving it to DMA TX channel to transmit.
*/
Xil_DCacheFlushRange((u32)&TxFrame, TxFrameLength);
/*
* Clear out receive packet memory area
*/
AxiEthernetUtilFrameMemClear(&RxFrame);
/*
* Invalidate the RX frame before giving it to DMA RX channel to
* receive data.
*/
Xil_DCacheInvalidateRange((u32)&RxFrame, TxFrameLength + 4);
/*
* Interrupt coalescing parameters are set to their default settings
* which is to interrupt the processor after every frame has been
* processed by the DMA engine.
*/
Status = XAxiDma_BdRingSetCoalesce(TxRingPtr, 1, 1);
if (Status != XST_SUCCESS) {
AxiEthernetUtilErrorTrap("Error setting coalescing for transmit");
return XST_FAILURE;
}
Status = XAxiDma_BdRingSetCoalesce(RxRingPtr, 1, 1);
if (Status != XST_SUCCESS) {
AxiEthernetUtilErrorTrap("Error setting coalescing for recv");
return XST_FAILURE;
}
/*
* Make sure Tx and Rx are enabled
*/
Status = XAxiEthernet_SetOptions(AxiEthernetInstancePtr,
XAE_RECEIVER_ENABLE_OPTION |
XAE_TRANSMITTER_ENABLE_OPTION );
if (Status != XST_SUCCESS) {
AxiEthernetUtilErrorTrap("Error setting options");
return XST_FAILURE;
}
Status = XAxiEthernet_SetOptions(AxiEthernetInstancePtr,
XAE_JUMBO_OPTION);
if (Status != XST_SUCCESS) {
AxiEthernetUtilErrorTrap("Error setting options");
return XST_FAILURE;
}
/*
* Start the AxiEthernet and enable its ERROR interrupts
*/
XAxiEthernet_Start(AxiEthernetInstancePtr);
XAxiEthernet_IntEnable(&AxiEthernetInstance,
XAE_INT_RECV_ERROR_MASK);
/*
* Enable DMA receive related interrupts
*/
XAxiDma_BdRingIntEnable(RxRingPtr, XAXIDMA_IRQ_ALL_MASK);
/*
* Allocate 1 RxBD.
*/
Status = XAxiDma_BdRingAlloc(RxRingPtr, 1, &BdPtr);
if (Status != XST_SUCCESS) {
AxiEthernetUtilErrorTrap("Error allocating RxBD");
return XST_FAILURE;
}
/*
* Setup the BD.
*/
XAxiDma_BdSetBufAddr(BdPtr, (u32)&RxFrame);
#ifndef XPAR_AXIDMA_0_ENABLE_MULTI_CHANNEL
XAxiDma_BdSetLength(BdPtr, sizeof(RxFrame));
#else
XAxiDma_BdSetLength(BdPtr, sizeof(RxFrame),
RxRingPtr->MaxTransferLen);
#endif
XAxiDma_BdSetCtrl(BdPtr, 0);
/*
* Enqueue to HW
*/
Status = XAxiDma_BdRingToHw(RxRingPtr, 1, BdPtr);
if (Status != XST_SUCCESS) {
AxiEthernetUtilErrorTrap("Error committing RxBD to HW");
return XST_FAILURE;
}
/*
* Start DMA RX channel. Now it's ready to receive data.
*/
Status = XAxiDma_BdRingStart(RxRingPtr);
if (Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Enable DMA transmit related interrupts
*/
XAxiDma_BdRingIntEnable(TxRingPtr, XAXIDMA_IRQ_ALL_MASK);
/*
* Allocate 1 TxBD
*/
Status = XAxiDma_BdRingAlloc(TxRingPtr, 1, &BdPtr);
if (Status != XST_SUCCESS) {
AxiEthernetUtilErrorTrap("Error allocating TxBD");
return XST_FAILURE;
}
/*
* Setup the TxBD
*/
XAxiDma_BdSetBufAddr(BdPtr, (u32)&TxFrame);
#ifndef XPAR_AXIDMA_0_ENABLE_MULTI_CHANNEL
XAxiDma_BdSetLength(BdPtr, TxFrameLength);
#else
XAxiDma_BdSetLength(BdPtr, TxFrameLength,
TxRingPtr->MaxTransferLen);
#endif
XAxiDma_BdSetCtrl(BdPtr, XAXIDMA_BD_CTRL_TXSOF_MASK |
XAXIDMA_BD_CTRL_TXEOF_MASK);
/*
* Enqueue to HW
*/
Status = XAxiDma_BdRingToHw(TxRingPtr, 1, BdPtr);
if (Status != XST_SUCCESS) {
AxiEthernetUtilErrorTrap("Error committing TxBD to HW");
return XST_FAILURE;
}
/*
* Start DMA TX channel. Transmission starts at once.
*/
Status = XAxiDma_BdRingStart(TxRingPtr);
if (Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Wait for transmission to complete
*/
while (!FramesTx);
/*
* Now that the frame has been sent, post process our TxBDs.
* Since we have only submitted 2 to HW, then there should be only 2
* ready for post processing.
*/
if (XAxiDma_BdRingFromHw(TxRingPtr, 1, &BdPtr) == 0) {
AxiEthernetUtilErrorTrap("TxBDs were not ready for post processing");
return XST_FAILURE;
}
/*
* Examine the TxBDs.
*
* There isn't much to do. The only thing to check would be DMA
* exception bits. But this would also be caught in the error handler.
* So we just return these BDs to the free list
*/
Status = XAxiDma_BdRingFree(TxRingPtr, 1, BdPtr);
if (Status != XST_SUCCESS) {
AxiEthernetUtilErrorTrap("Error freeing up TxBDs");
return XST_FAILURE;
}
/*
* Wait for Rx indication
*/
while (!FramesRx);
/*
* Now that the frame has been received, post process our RxBD.
* Since we have only submitted 1 to HW, then there should be only 1
* ready for post processing.
*/
if (XAxiDma_BdRingFromHw(RxRingPtr, 1, &BdPtr) == 0) {
AxiEthernetUtilErrorTrap("RxBD was not ready for post processing");
return XST_FAILURE;
}
BdCurPtr = BdPtr;
BdSts = XAxiDma_BdGetSts(BdCurPtr);
if ((BdSts & XAXIDMA_BD_STS_ALL_ERR_MASK) ||
(!(BdSts & XAXIDMA_BD_STS_COMPLETE_MASK))) {
AxiEthernetUtilErrorTrap("Rx Error");
return XST_FAILURE;
}
else {
RxFrameLength =
(XAxiDma_BdRead(BdCurPtr,XAXIDMA_BD_USR4_OFFSET)) & 0x0000FFFF;
}
/* Expected RX TPID+CFI+VID !!! */
VTagCfiVid = (((u32)Tpid2 << 16) | ((u32)Cfi2 << 12) | RxStrpVid);
/* Check on the VLAN CFI and VID */
RxStatusControlWord = XAxiDma_BdGetAppWord(BdPtr,
BD_VLAN_VID_OFFSET, &Valid);
if(Valid) {
RxCfiVid = RxStatusControlWord >> 16;
RxCfiVid = Xil_Ntohs(RxCfiVid);
if(RxCfiVid != (VTagCfiVid & 0x0000FFFF)) {
AxiEthernetUtilErrorTrap("VLAN CFI and VID mismatch\n");
return XST_FAILURE;
}
}
else {