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checker_slave/source/eth/ethernetif.c

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2023-06-10 11:52:00 +08:00
/**
* @file
* Ethernet Interface Skeleton
*
*/
/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
/*
* This file is a skeleton for developing Ethernet network interface
* drivers for lwIP. Add code to the low_level functions and do a
* search-and-replace for the word "ethernetif" to replace it with
* something that better describes your network interface.
*/
#include "lwip/opt.h"
#include "lwip/def.h"
#include "lwip/mem.h"
#include "lwip/pbuf.h"
#include "lwip/timers.h"
#include "netif/etharp.h"
#include "lwip/err.h"
#include "ethernetif.h"
#include "rtthread.h"
#include "stm32f4x7_eth.h"
#include <string.h>
#include "dev_flash.h"
#define netifMTU (1500)
#define netifINTERFACE_TASK_STACK_SIZE ( 1024 )
#define netifINTERFACE_TASK_PRIORITY ( configMAX_PRIORITIES - 1 )
#define netifGUARD_BLOCK_TIME ( 250 )
/* The time to block waiting for input. */
#define emacBLOCK_TIME_WAITING_FOR_INPUT ( ( portTickType ) 100 )
/* Define those to better describe your network interface. */
#define IFNAME0 's'
#define IFNAME1 't'
static struct netif *s_pxNetIf = NULL;
static rt_sem_t s_xSemaphore = NULL;
/* Ethernet Rx & Tx DMA Descriptors */
extern ETH_DMADESCTypeDef DMARxDscrTab[ETH_RXBUFNB], DMATxDscrTab[ETH_TXBUFNB];
/* Ethernet Receive buffers */
extern uint8_t Rx_Buff[ETH_RXBUFNB][ETH_RX_BUF_SIZE];
/* Ethernet Transmit buffers */
extern uint8_t Tx_Buff[ETH_TXBUFNB][ETH_TX_BUF_SIZE];
/* Global pointers to track current transmit and receive descriptors */
extern ETH_DMADESCTypeDef *DMATxDescToSet;
extern ETH_DMADESCTypeDef *DMARxDescToGet;
/* Global pointer for last received frame infos */
extern ETH_DMA_Rx_Frame_infos *DMA_RX_FRAME_infos;
static void ethernetif_input( void * pvParameters );
static void arp_timer(void *arg);
/**
* In this function, the hardware should be initialized.
* Called from ethernetif_init().
*
* @param netif the already initialized lwip network interface structure
* for this ethernetif
*/
static void low_level_init(struct netif *netif)
{
uint32_t i;
/* set netif MAC hardware address length */
netif->hwaddr_len = ETHARP_HWADDR_LEN;
/* set netif MAC hardware address */
const uint8_t *mac=sys_param()->mac;
netif->hwaddr[0] = mac[0];
netif->hwaddr[1] = mac[1];
netif->hwaddr[2] = mac[2];
netif->hwaddr[3] = mac[3];
netif->hwaddr[4] = mac[4];
netif->hwaddr[5] = mac[5];
/* set netif maximum transfer unit */
netif->mtu = 1500;
/* Accept broadcast address and ARP traffic */
netif->flags = NETIF_FLAG_BROADCAST | NETIF_FLAG_ETHARP;
s_pxNetIf =netif;
/* create binary semaphore used for informing ethernetif of frame reception */
if (s_xSemaphore == NULL)
{
//vSemaphoreCreateBinary(s_xSemaphore);
s_xSemaphore=rt_sem_create("eth_recv",0,RT_IPC_FLAG_PRIO);
//xSemaphoreTake( s_xSemaphore, 0);
//rt_sem_take(s_xSemaphore,0);
}
/* initialize MAC address in ethernet MAC */
ETH_MACAddressConfig(ETH_MAC_Address0, netif->hwaddr);
/* Initialize Tx Descriptors list: Chain Mode */
ETH_DMATxDescChainInit(DMATxDscrTab, &Tx_Buff[0][0], ETH_TXBUFNB);
/* Initialize Rx Descriptors list: Chain Mode */
ETH_DMARxDescChainInit(DMARxDscrTab, &Rx_Buff[0][0], ETH_RXBUFNB);
/* Enable Ethernet Rx interrrupt */
{
for(i=0; i<ETH_RXBUFNB; i++)
{
ETH_DMARxDescReceiveITConfig(&DMARxDscrTab[i], ENABLE);
}
}
#ifdef CHECKSUM_BY_HARDWARE
/* Enable the checksum insertion for the Tx frames */
{
for(i=0; i<ETH_TXBUFNB; i++)
{
ETH_DMATxDescChecksumInsertionConfig(&DMATxDscrTab[i], ETH_DMATxDesc_ChecksumTCPUDPICMPFull);
}
}
#endif
/* create the task that handles the ETH_MAC */
// xTaskCreate(ethernetif_input, (signed char*) "Eth_if", netifINTERFACE_TASK_STACK_SIZE, NULL,
// netifINTERFACE_TASK_PRIORITY,NULL);
rt_thread_t t= rt_thread_create("eth_recv_t",ethernetif_input,NULL,netifINTERFACE_TASK_STACK_SIZE,
19,20);
rt_thread_startup(t);
/* Enable MAC and DMA transmission and reception */
ETH_Start();
}
void ETH_IRQHandler(void)
{
rt_interrupt_enter();
/* Frame received */
if ( ETH_GetDMAFlagStatus(ETH_DMA_FLAG_R) == SET)
{
/* Give the semaphore to wakeup LwIP task */
//xSemaphoreGiveFromISR( s_xSemaphore, &xHigherPriorityTaskWoken );
if(s_xSemaphore!=NULL)
{
rt_sem_release(s_xSemaphore);
}
}
/* Clear the interrupt flags. */
/* Clear the Eth DMA Rx IT pending bits */
ETH_DMAClearITPendingBit(ETH_DMA_IT_R);
ETH_DMAClearITPendingBit(ETH_DMA_IT_NIS);
rt_interrupt_leave();
}
/**
* This function should do the actual transmission of the packet. The packet is
* contained in the pbuf that is passed to the function. This pbuf
* might be chained.
*
* @param netif the lwip network interface structure for this ethernetif
* @param p the MAC packet to send (e.g. IP packet including MAC addresses and type)
* @return ERR_OK if the packet could be sent
* an err_t value if the packet couldn't be sent
*
* @note Returning ERR_MEM here if a DMA queue of your MAC is full can lead to
* strange results. You might consider waiting for space in the DMA queue
* to become availale since the stack doesn't retry to send a packet
* dropped because of memory failure (except for the TCP timers).
*/
static err_t low_level_output(struct netif *netif, struct pbuf *p)
{
static rt_mutex_t xTxSemaphore = NULL;
struct pbuf *q;
u8 *buffer ;
__IO ETH_DMADESCTypeDef *DmaTxDesc;
uint16_t framelength = 0;
uint32_t bufferoffset = 0;
uint32_t byteslefttocopy = 0;
uint32_t payloadoffset = 0;
if (xTxSemaphore == NULL)
{
//vSemaphoreCreateBinary (xTxSemaphore);
xTxSemaphore=rt_mutex_create("eth_out_mut",RT_IPC_FLAG_PRIO);
}
//if (xSemaphoreTake(xTxSemaphore, netifGUARD_BLOCK_TIME))
if(rt_mutex_take(xTxSemaphore,RT_WAITING_FOREVER)==RT_EOK)
{
DmaTxDesc = DMATxDescToSet;
buffer = (u8 *)(DmaTxDesc->Buffer1Addr);
bufferoffset = 0;
for(q = p; q != NULL; q = q->next)
{
if((DmaTxDesc->Status & ETH_DMATxDesc_OWN) != (u32)RESET)
{
goto error;
}
/* Get bytes in current lwIP buffer */
byteslefttocopy = q->len;
payloadoffset = 0;
/* Check if the length of data to copy is bigger than Tx buffer size*/
while( (byteslefttocopy + bufferoffset) > ETH_TX_BUF_SIZE )
{
/* Copy data to Tx buffer*/
memcpy( (u8_t*)((u8_t*)buffer + bufferoffset), (u8_t*)((u8_t*)q->payload + payloadoffset), (ETH_TX_BUF_SIZE - bufferoffset) );
/* Point to next descriptor */
DmaTxDesc = (ETH_DMADESCTypeDef *)(DmaTxDesc->Buffer2NextDescAddr);
/* Check if the buffer is available */
if((DmaTxDesc->Status & ETH_DMATxDesc_OWN) != (u32)RESET)
{
goto error;
}
buffer = (u8 *)(DmaTxDesc->Buffer1Addr);
byteslefttocopy = byteslefttocopy - (ETH_TX_BUF_SIZE - bufferoffset);
payloadoffset = payloadoffset + (ETH_TX_BUF_SIZE - bufferoffset);
framelength = framelength + (ETH_TX_BUF_SIZE - bufferoffset);
bufferoffset = 0;
}
/* Copy the remaining bytes */
memcpy( (u8_t*)((u8_t*)buffer + bufferoffset), (u8_t*)((u8_t*)q->payload + payloadoffset), byteslefttocopy );
bufferoffset = bufferoffset + byteslefttocopy;
framelength = framelength + byteslefttocopy;
}
/* Prepare transmit descriptors to give to DMA*/
ETH_Prepare_Transmit_Descriptors(framelength);
/* Give semaphore and exit */
error:
//xSemaphoreGive(xTxSemaphore);
rt_mutex_release(xTxSemaphore);
}
return ERR_OK;
}
/**
* Should allocate a pbuf and transfer the bytes of the incoming
* packet from the interface into the pbuf.
*
* @param netif the lwip network interface structure for this ethernetif
* @return a pbuf filled with the received packet (including MAC header)
* NULL on memory error
*/
static struct pbuf * low_level_input(struct netif *netif)
{
struct pbuf *p= NULL, *q;
u32_t len;
FrameTypeDef frame;
u8 *buffer;
__IO ETH_DMADESCTypeDef *DMARxDesc;
uint32_t bufferoffset = 0;
uint32_t payloadoffset = 0;
uint32_t byteslefttocopy = 0;
uint32_t i=0;
/* get received frame */
frame = ETH_Get_Received_Frame_interrupt();
/* Obtain the size of the packet and put it into the "len" variable. */
len = frame.length;
buffer = (u8 *)frame.buffer;
if (len > 0)
{
/* We allocate a pbuf chain of pbufs from the Lwip buffer pool */
p = pbuf_alloc(PBUF_RAW, len, PBUF_POOL);
}
if (p != NULL)
{
DMARxDesc = frame.descriptor;
bufferoffset = 0;
for(q = p; q != NULL; q = q->next)
{
byteslefttocopy = q->len;
payloadoffset = 0;
/* Check if the length of bytes to copy in current pbuf is bigger than Rx buffer size*/
while( (byteslefttocopy + bufferoffset) > ETH_RX_BUF_SIZE )
{
/* Copy data to pbuf*/
memcpy( (u8_t*)((u8_t*)q->payload + payloadoffset), (u8_t*)((u8_t*)buffer + bufferoffset), (ETH_RX_BUF_SIZE - bufferoffset));
/* Point to next descriptor */
DMARxDesc = (ETH_DMADESCTypeDef *)(DMARxDesc->Buffer2NextDescAddr);
buffer = (unsigned char *)(DMARxDesc->Buffer1Addr);
byteslefttocopy = byteslefttocopy - (ETH_RX_BUF_SIZE - bufferoffset);
payloadoffset = payloadoffset + (ETH_RX_BUF_SIZE - bufferoffset);
bufferoffset = 0;
}
/* Copy remaining data in pbuf */
memcpy( (u8_t*)((u8_t*)q->payload + payloadoffset), (u8_t*)((u8_t*)buffer + bufferoffset), byteslefttocopy);
bufferoffset = bufferoffset + byteslefttocopy;
}
/* Release descriptors to DMA */
DMARxDesc =frame.descriptor;
/* Set Own bit in Rx descriptors: gives the buffers back to DMA */
for (i=0; i<DMA_RX_FRAME_infos->Seg_Count; i++)
{
DMARxDesc->Status = ETH_DMARxDesc_OWN;
DMARxDesc = (ETH_DMADESCTypeDef *)(DMARxDesc->Buffer2NextDescAddr);
}
/* Clear Segment_Count */
DMA_RX_FRAME_infos->Seg_Count =0;
/* added for test*/
}
/* When Rx Buffer unavailable flag is set: clear it and resume reception */
if ((ETH->DMASR & ETH_DMASR_RBUS) != (u32)RESET)
{
/* Clear RBUS ETHERNET DMA flag */
ETH->DMASR = ETH_DMASR_RBUS;
/* Resume DMA reception */
ETH->DMARPDR = 0;
}
return p;
}
/**
* This function is the ethernetif_input task, it is processed when a packet
* is ready to be read from the interface. It uses the function low_level_input()
* that should handle the actual reception of bytes from the network
* interface. Then the type of the received packet is determined and
* the appropriate input function is called.
*
* @param netif the lwip network interface structure for this ethernetif
*/
void ethernetif_input( void * pvParameters )
{
struct pbuf *p;
for( ;; )
{
//if (xSemaphoreTake( s_xSemaphore, emacBLOCK_TIME_WAITING_FOR_INPUT)==pdTRUE)
if(rt_sem_take(s_xSemaphore,RT_WAITING_FOREVER)==RT_EOK)
{
TRY_GET_NEXT_FRAME:
p = low_level_input( s_pxNetIf );
if (p != NULL)
{
if (ERR_OK != s_pxNetIf->input( p, s_pxNetIf))
{
pbuf_free(p);
}
else
{
goto TRY_GET_NEXT_FRAME;
}
}
}
}
}
/**
* Should be called at the beginning of the program to set up the
* network interface. It calls the function low_level_init() to do the
* actual setup of the hardware.
*
* This function should be passed as a parameter to netif_add().
*
* @param netif the lwip network interface structure for this ethernetif
* @return ERR_OK if the loopif is initialized
* ERR_MEM if private data couldn't be allocated
* any other err_t on error
*/
err_t ethernetif_init(struct netif *netif)
{
LWIP_ASSERT("netif != NULL", (netif != NULL));
#if LWIP_NETIF_HOSTNAME
/* Initialize interface hostname */
netif->hostname = "lwip";
#endif /* LWIP_NETIF_HOSTNAME */
netif->name[0] = IFNAME0;
netif->name[1] = IFNAME1;
netif->output = etharp_output;
netif->linkoutput = low_level_output;
/* initialize the hardware */
low_level_init(netif);
etharp_init();
sys_timeout(ARP_TMR_INTERVAL, arp_timer, NULL);
return ERR_OK;
}
static void arp_timer(void *arg)
{
etharp_tmr();
sys_timeout(ARP_TMR_INTERVAL, arp_timer, NULL);
}