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andy
2023-06-10 11:52:00 +08:00
parent e4616bfae5
commit 077c27f2bb
499 changed files with 199745 additions and 92 deletions
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source/eth/ethernetif--.c Normal file
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/**
* @file
* Ethernet Interface for standalone applications (without RTOS) - works only for
* ethernet polling mode (polling for ethernet frame reception)
*
*/
/*
* 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>
*
*/
#include "lwip/opt.h"
#include "lwip/mem.h"
#include "netif/etharp.h"
#include "ethernetif.h"
#include "stm32f4x7_eth.h"
#include "stm32f4xx.h"
#include <string.h>
/* Network interface name */
#define IFNAME0 's'
#define IFNAME1 't'
/* Ethernet Rx & Tx DMA Descriptors */
extern ETH_DMADESCTypeDef DMARxDscrTab[ETH_RXBUFNB], DMATxDscrTab[ETH_TXBUFNB];
/* Ethernet Driver Receive buffers */
extern uint8_t Rx_Buff[ETH_RXBUFNB][ETH_RX_BUF_SIZE];
/* Ethernet Driver 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;
/**
* 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)
{
#ifdef CHECKSUM_BY_HARDWARE
int i;
#endif
/* set MAC hardware address length */
netif->hwaddr_len = ETHARP_HWADDR_LEN;
/* set MAC hardware address */
netif->hwaddr[0] = 0xaa;
netif->hwaddr[1] = 0xcc;
netif->hwaddr[2] = 0xbb;
netif->hwaddr[3] = 0xdd;
netif->hwaddr[4] = 0xee;
netif->hwaddr[5] = 0xcd;
/* initialize MAC address in ethernet MAC */
ETH_MACAddressConfig(ETH_MAC_Address0, netif->hwaddr);
/* maximum transfer unit */
netif->mtu = 1500;
/* device capabilities */
/* don't set NETIF_FLAG_ETHARP if this device is not an ethernet one */
netif->flags = NETIF_FLAG_BROADCAST | NETIF_FLAG_ETHARP;
/* 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);
#ifdef CHECKSUM_BY_HARDWARE
/* Enable the TCP, UDP and ICMP checksum insertion for the Tx frames */
for(i=0; i<ETH_TXBUFNB; i++)
{
ETH_DMATxDescChecksumInsertionConfig(&DMATxDscrTab[i], ETH_DMATxDesc_ChecksumTCPUDPICMPFull);
}
#endif
/* Note: TCP, UDP, ICMP checksum checking for received frame are enabled in DMA config */
/* Enable MAC and DMA transmission and reception */
ETH_Start();
}
void ETH_IRQHandler(void)
{
/* Frame received */
if ( ETH_GetDMAFlagStatus(ETH_DMA_FLAG_R) == SET)
{
/* Give the semaphore to wakeup LwIP task */
xSemaphoreGiveFromISR( s_xSemaphore, &xHigherPriorityTaskWoken );
}
/* Clear the interrupt flags. */
/* Clear the Eth DMA Rx IT pending bits */
ETH_DMAClearITPendingBit(ETH_DMA_IT_R);
ETH_DMAClearITPendingBit(ETH_DMA_IT_NIS);
}
/**
* 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)
{
err_t errval;
struct pbuf *q;
u8 *buffer = (u8 *)(DMATxDescToSet->Buffer1Addr);
__IO ETH_DMADESCTypeDef *DmaTxDesc;
uint16_t framelength = 0;
uint32_t bufferoffset = 0;
uint32_t byteslefttocopy = 0;
uint32_t payloadoffset = 0;
DmaTxDesc = DMATxDescToSet;
bufferoffset = 0;
/* copy frame from pbufs to driver buffers */
for(q = p; q != NULL; q = q->next)
{
/* Is this buffer available? If not, goto error */
if((DmaTxDesc->Status & ETH_DMATxDesc_OWN) != (u32)RESET)
{
errval = ERR_BUF;
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)
{
errval = ERR_USE;
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;
}
/* Note: padding and CRC for transmitted frame
are automatically inserted by DMA */
/* Prepare transmit descriptors to give to DMA*/
ETH_Prepare_Transmit_Descriptors(framelength);
errval = ERR_OK;
error:
/* When Transmit Underflow flag is set, clear it and issue a Transmit Poll Demand to resume transmission */
if ((ETH->DMASR & ETH_DMASR_TUS) != (uint32_t)RESET)
{
/* Clear TUS ETHERNET DMA flag */
ETH->DMASR = ETH_DMASR_TUS;
/* Resume DMA transmission*/
ETH->DMATPDR = 0;
}
return errval;
}
/**
* 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, *q;
uint32_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();
/* Obtain the size of the packet and put it into the "len" variable. */
len = frame.length;
buffer = (u8 *)frame.buffer;
/* 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;
/* 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 should be called 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
*/
err_t ethernetif_input(struct netif *netif)
{
err_t err;
struct pbuf *p;
/* move received packet into a new pbuf */
p = low_level_input(netif);
/* no packet could be read, silently ignore this */
if (p == NULL) return ERR_MEM;
/* entry point to the LwIP stack */
err = netif->input(p, netif);
if (err != ERR_OK)
{
LWIP_DEBUGF(NETIF_DEBUG, ("ethernetif_input: IP input error\n"));
pbuf_free(p);
}
return err;
}
/**
* 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;
/* We directly use etharp_output() here to save a function call.
* You can instead declare your own function an call etharp_output()
* from it if you have to do some checks before sending (e.g. if link
* is available...) */
netif->output = etharp_output;
netif->linkoutput = low_level_output;
/* initialize the hardware */
low_level_init(netif);
return ERR_OK;
}