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lwip/liteethif: cleanup, drop frames above MTU (#398)

This commit is contained in:
Sebastien Bourdeauducq 2016-05-07 17:42:22 +08:00
parent d365ce8de8
commit 18b6718d0c
3 changed files with 41 additions and 61 deletions
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93
artiq/runtime/liblwip/liteethif.c
View File

@ -15,9 +15,6 @@
#include <hw/flags.h>
#include <hw/ethmac_mem.h>
static unsigned int rxslot;
static unsigned int rxlen;
static char *rxbuffer;
static char *rxbuffer0;
static char *rxbuffer1;
static unsigned int txslot;
@ -29,31 +26,6 @@ static char *txbuffer1;
#define IFNAME0 'e'
#define IFNAME1 't'
static void liteeth_low_level_init(struct netif *netif)
{
int i;
netif->hwaddr_len = 6;
for(i=0;i<netif->hwaddr_len;i++)
netif->hwaddr[i] = macadr[i];
netif->mtu = 1514;
netif->flags = NETIF_FLAG_BROADCAST | NETIF_FLAG_ETHARP;
ethmac_sram_reader_ev_pending_write(ETHMAC_EV_SRAM_READER);
ethmac_sram_writer_ev_pending_write(ETHMAC_EV_SRAM_WRITER);
rxbuffer0 = (char *)ETHMAC_RX0_BASE;
rxbuffer1 = (char *)ETHMAC_RX1_BASE;
txbuffer0 = (char *)ETHMAC_TX0_BASE;
txbuffer1 = (char *)ETHMAC_TX1_BASE;
rxslot = 0;
txslot = 0;
rxbuffer = rxbuffer0;
txbuffer = txbuffer0;
}
static err_t liteeth_low_level_output(struct netif *netif, struct pbuf *p)
{
struct pbuf *q;
@ -86,26 +58,36 @@ static err_t liteeth_low_level_output(struct netif *netif, struct pbuf *p)
static struct pbuf *liteeth_low_level_input(struct netif *netif)
{
unsigned int rxslot;
unsigned int rxlen;
char *rxbuffer;
struct pbuf *p, *q;
rxslot = ethmac_sram_writer_slot_read();
rxlen = ethmac_sram_writer_length_read();
if(rxslot)
rxbuffer = rxbuffer1;
else
rxbuffer = rxbuffer0;
p = NULL;
p = pbuf_alloc(PBUF_RAW, rxlen, PBUF_POOL);
q = p;
while(q) {
memcpy(q->payload, rxbuffer, q->len);
rxbuffer += q->len;
if(q->tot_len != q->len)
q = q->next;
else
q = NULL;
if(ethmac_sram_writer_ev_pending_read() & ETHMAC_EV_SRAM_WRITER) {
rxslot = ethmac_sram_writer_slot_read();
rxlen = ethmac_sram_writer_length_read();
/* dest MAC + source MAC + 802.1Q + ethertype + payload (MTU) */
if(rxlen <= (netif->mtu + 18)) {
if(rxslot)
rxbuffer = rxbuffer1;
else
rxbuffer = rxbuffer0;
p = pbuf_alloc(PBUF_RAW, rxlen, PBUF_POOL);
q = p;
while(q) {
memcpy(q->payload, rxbuffer, q->len);
rxbuffer += q->len;
if(q->tot_len != q->len)
q = q->next;
else
q = NULL;
}
}
ethmac_sram_writer_ev_pending_write(ETHMAC_EV_SRAM_WRITER);
}
return p;
}
@ -119,23 +101,28 @@ void liteeth_input(struct netif *netif)
err_t liteeth_init(struct netif *netif)
{
struct liteethif *liteethif;
liteethif = mem_malloc(sizeof(struct liteethif));
if(liteethif == NULL)
return ERR_MEM;
netif->state = liteethif;
int i;
netif->hwaddr_len = 6;
for(i=0;i<netif->hwaddr_len;i++)
netif->hwaddr[i] = macadr[i];
netif->name[0] = IFNAME0;
netif->name[1] = IFNAME1;
netif->output = etharp_output;
netif->linkoutput = liteeth_low_level_output;
netif->mtu = 1514;
netif->mtu = 1500;
netif->flags = NETIF_FLAG_BROADCAST | NETIF_FLAG_ETHARP;
liteethif->ethaddr = (struct eth_addr *)&(netif->hwaddr[0]);
ethmac_sram_reader_ev_pending_write(ETHMAC_EV_SRAM_READER);
ethmac_sram_writer_ev_pending_write(ETHMAC_EV_SRAM_WRITER);
liteeth_low_level_init(netif);
rxbuffer0 = (char *)ETHMAC_RX0_BASE;
rxbuffer1 = (char *)ETHMAC_RX1_BASE;
txbuffer0 = (char *)ETHMAC_TX0_BASE;
txbuffer1 = (char *)ETHMAC_TX1_BASE;
txslot = 0;
txbuffer = txbuffer0;
return ERR_OK;
}

4
artiq/runtime/liblwip/liteethif.h
View File

@ -7,10 +7,6 @@
extern unsigned char macadr[];
struct liteethif {
struct eth_addr *ethaddr;
};
void liteeth_input(struct netif *netif);
err_t liteeth_init(struct netif *netif);

5
artiq/runtime/main.c
View File

@ -56,10 +56,7 @@ static void lwip_service(void)
{
sys_check_timeouts();
#ifdef CSR_ETHMAC_BASE
if(ethmac_sram_writer_ev_pending_read() & ETHMAC_EV_SRAM_WRITER) {
liteeth_input(&netif);
ethmac_sram_writer_ev_pending_write(ETHMAC_EV_SRAM_WRITER);
}
liteeth_input(&netif);
#else
if(uart_read_nonblock()) {
u8_t c;