ref: 46bac13b16df5cbd92ea1da12cfef168201f0dad
dir: /sys/src/boot/zynq/net.c/
#include <u.h>
#include "dat.h"
#include "fns.h"
#include "mem.h"
enum {
ETHLEN = 1600,
UDPLEN = 576,
NRX = 64,
RXBASE = 128 * 1024 * 1024,
ETHHEAD = 14,
IPHEAD = 20,
UDPHEAD = 8,
BOOTREQ = 1,
DHCPDISCOVER = 1,
DHCPOFFER,
DHCPREQUEST,
DHCPDECLINE,
};
enum {
NET_CTRL,
NET_CFG,
NET_STATUS,
DMA_CFG = 4,
TX_STATUS,
RX_QBAR,
TX_QBAR,
RX_STATUS,
INTR_STATUS,
INTR_EN,
INTR_DIS,
INTR_MASK,
PHY_MAINT,
RX_PAUSEQ,
TX_PAUSEQ,
HASH_BOT = 32,
HASH_TOP,
SPEC_ADDR1_BOT,
SPEC_ADDR1_TOP,
};
enum {
MDCTRL,
MDSTATUS,
MDID1,
MDID2,
MDAUTOADV,
MDAUTOPART,
MDAUTOEX,
MDAUTONEXT,
MDAUTOLINK,
MDGCTRL,
MDGSTATUS,
MDPHYCTRL = 0x1f,
};
enum {
/* NET_CTRL */
RXEN = 1<<2,
TXEN = 1<<3,
MDEN = 1<<4,
STARTTX = 1<<9,
/* NET_CFG */
SPEED = 1<<0,
FDEN = 1<<1,
RX1536EN = 1<<8,
GIGE_EN = 1<<10,
RXCHKSUMEN = 1<<24,
/* NET_STATUS */
PHY_IDLE = 1<<2,
/* DMA_CFG */
TXCHKSUMEN = 1<<11,
/* TX_STATUS */
TXCOMPL = 1<<5,
/* MDCTRL */
MDRESET = 1<<15,
AUTONEG = 1<<12,
FULLDUP = 1<<8,
/* MDSTATUS */
LINK = 1<<2,
/* MDGSTATUS */
RECVOK = 3<<12,
};
typedef struct {
uchar edest[6];
uchar esrc[6];
ulong idest;
ulong isrc;
ushort dport, sport;
ushort len;
uchar data[UDPLEN];
} udp;
static ulong *eth0 = (ulong *) 0xe000b000;
static int phyaddr = 7;
static u32int myip, dhcpip, tftpip, xid;
static uchar mac[6] = {0x0E, 0xA7, 0xDE, 0xAD, 0xBE, 0xEF};
static uchar tmac[6] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
static char file[128];
static udp ubuf, urbuf;
static uchar txbuf[ETHLEN];
static ulong txdesc[4], *txact, *rxact;
static ulong rxdesc[NRX*2];
void
mdwrite(ulong *r, int reg, u16int val)
{
while((r[NET_STATUS] & PHY_IDLE) == 0)
;
r[PHY_MAINT] = 1<<30 | 1<<28 | 1<<17 | phyaddr << 23 | reg << 18 | val;
while((r[NET_STATUS] & PHY_IDLE) == 0)
;
}
u16int
mdread(ulong *r, int reg)
{
while((r[NET_STATUS] & PHY_IDLE) == 0)
;
r[PHY_MAINT] = 1<<30 | 1<<29 | 1<<17 | phyaddr << 23 | reg << 18;
while((r[NET_STATUS] & PHY_IDLE) == 0)
;
return r[PHY_MAINT];
}
void
ethinit(ulong *r)
{
int v;
ulong *p;
ulong d;
r[NET_CTRL] = 0;
r[RX_STATUS] = 0xf;
r[TX_STATUS] = 0xff;
r[INTR_DIS] = 0x7FFFEFF;
r[RX_QBAR] = r[TX_QBAR] = 0;
r[NET_CFG] = MDC_DIV << 18 | FDEN | SPEED | RX1536EN | GIGE_EN | RXCHKSUMEN;
r[SPEC_ADDR1_BOT] = mac[0] | mac[1] << 8 | mac[2] << 16 | mac[3] << 24;
r[SPEC_ADDR1_TOP] = mac[4] | mac[5] << 8;
r[DMA_CFG] = TXCHKSUMEN | 0x18 << 16 | 1 << 10 | 3 << 8 | 0x10;
txdesc[0] = 0;
txdesc[1] = 1<<31;
txdesc[2] = 0;
txdesc[3] = 1<<31 | 1<<30;
txact = txdesc;
r[TX_QBAR] = (ulong) txdesc;
for(p = rxdesc, d = RXBASE; p < rxdesc + nelem(rxdesc); d += ETHLEN){
*p++ = d;
*p++ = 0;
}
p[-2] |= 2;
rxact = rxdesc;
r[RX_QBAR] = (ulong) rxdesc;
r[NET_CTRL] = MDEN;
// mdwrite(r, MDCTRL, MDRESET);
mdwrite(r, MDCTRL, AUTONEG);
if((mdread(r, MDSTATUS) & LINK) == 0){
puts("Waiting for Link ...\n");
while((mdread(r, MDSTATUS) & LINK) == 0)
;
}
*(u32int*)(SLCR_BASE + SLCR_UNLOCK) = UNLOCK_KEY;
v = mdread(r, MDPHYCTRL);
if((v & 0x40) != 0){
puts("1000BASE-T");
while((mdread(r, MDGSTATUS) & RECVOK) != RECVOK)
;
r[NET_CFG] |= GIGE_EN;
*(u32int*)(SLCR_BASE + GEM0_CLK_CTRL) = 1 << 20 | 8 << 8 | 1;
}else if((v & 0x20) != 0){
puts("100BASE-TX");
r[NET_CFG] = r[NET_CFG] & ~GIGE_EN | SPEED;
*(u32int*)(SLCR_BASE + GEM0_CLK_CTRL) = 5 << 20 | 8 << 8 | 1;
}else if((v & 0x10) != 0){
puts("10BASE-T");
r[NET_CFG] = r[NET_CFG] & ~(GIGE_EN | SPEED);
*(u32int*)(SLCR_BASE + GEM0_CLK_CTRL) = 20 << 20 | 20 << 8 | 1;
}else
puts("???");
*(u32int*)(SLCR_BASE + SLCR_UNLOCK) = LOCK_KEY;
if((v & 0x08) != 0)
puts(" Full Duplex\n");
else{
puts(" Half Duplex\n");
r[NET_CFG] &= ~FDEN;
}
r[NET_CTRL] |= TXEN | RXEN;
}
void
ethtx(ulong *r, uchar *buf, int len)
{
txact[0] = (ulong) buf;
txact[1] = 1<<15 | len;
if(txact == txdesc + nelem(txdesc) - 2){
txact[1] |= 1<<30;
txact = txdesc;
}else
txact += 2;
r[TX_STATUS] = -1;
r[NET_CTRL] |= STARTTX;
while((r[TX_STATUS] & TXCOMPL) == 0)
;
}
void
udptx(ulong *r, udp *u)
{
uchar *p, *q;
int n;
p = q = txbuf;
memcpy(p, u->edest, 6);
memcpy(p + 6, u->esrc, 6);
q += 12;
*q++ = 8;
*q++ = 0;
*q++ = 5 | 4 << 4;
*q++ = 0;
n = IPHEAD + UDPHEAD + u->len;
*q++ = n >> 8;
*q++ = n;
*q++ = 0x13;
*q++ = 0x37;
*q++ = 1<<6;
*q++ = 0;
*q++ = 1;
*q++ = 0x11;
*q++ = 0;
*q++ = 0;
q = u32put(q, u->isrc);
q = u32put(q, u->idest);
*q++ = u->sport >> 8;
*q++ = u->sport;
*q++ = u->dport >> 8;
*q++ = u->dport;
n = UDPHEAD + u->len;
*q++ = n >> 8;
*q++ = n;
*q++ = 0;
*q++ = 0;
memcpy(q, u->data, u->len);
ethtx(r, p, ETHHEAD + IPHEAD + UDPHEAD + u->len);
}
void
dhcppkg(ulong *r, int t)
{
uchar *p;
udp *u;
u = &ubuf;
p = u->data;
*p++ = BOOTREQ;
*p++ = 1;
*p++ = 6;
*p++ = 0;
p = u32put(p, xid);
p = u32put(p, 0x8000);
memset(p, 0, 16);
u32put(p + 8, dhcpip);
p += 16;
memcpy(p, mac, 6);
p += 6;
memset(p, 0, 202);
p += 202;
*p++ = 99;
*p++ = 130;
*p++ = 83;
*p++ = 99;
*p++ = 53;
*p++ = 1;
*p++ = t;
if(t == DHCPREQUEST){
*p++ = 50;
*p++ = 4;
p = u32put(p, myip);
*p++ = 54;
*p++ = 4;
p = u32put(p, dhcpip);
}
*p++ = 0xff;
memset(u->edest, 0xff, 6);
memcpy(u->esrc, mac, 6);
u->sport = 68;
u->dport = 67;
u->idest = -1;
u->isrc = 0;
u->len = p - u->data;
udptx(r, u);
}
uchar *
ethrx(void)
{
while((*rxact & 1) == 0)
if(timertrig())
return nil;
return (uchar *) (*rxact & ~3);
}
void
ethnext(void)
{
*rxact &= ~1;
if((*rxact & 2) != 0)
rxact = rxdesc;
else
rxact += 2;
}
void
arp(int op, uchar *edest, ulong idest)
{
uchar *p;
static uchar broad[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
p = txbuf;
if(edest == nil)
edest = broad;
memcpy(p, edest, 6);
memcpy(p + 6, mac, 6);
p[12] = 8;
p[13] = 6;
p += 14;
p = u32put(p, 0x00010800);
p = u32put(p, 0x06040000 | op);
memcpy(p, mac, 6);
p = u32put(p + 6, myip);
memcpy(p, edest, 6);
p = u32put(p + 6, idest);
ethtx(eth0, txbuf, p - txbuf);
}
void
arpc(uchar *p)
{
p += 14;
if(u32get(p) != 0x00010800 || p[4] != 6 || p[5] != 4 || p[6] != 0)
return;
switch(p[7]){
case 1:
if(myip != 0 && u32get(p + 24) == myip)
arp(2, p + 8, u32get(p + 14));
break;
case 2:
if(tftpip != 0 && u32get(p + 14) == tftpip)
memcpy(tmac, p + 8, 6);
break;
}
}
udp *
udprx(void)
{
uchar *p;
ulong v;
udp *u;
u = &urbuf;
for(;; ethnext()){
p = ethrx();
if(p == nil)
return nil;
if(p[12] != 8)
continue;
if(p[13] == 6){
arpc(p);
continue;
}
if(p[13] != 0)
continue;
p += ETHHEAD;
if((p[0] >> 4) != 4 || p[9] != 0x11)
continue;
v = u32get(p + 16);
if(v != (ulong) -1 && v != myip)
continue;
u->idest = v;
u->isrc = u32get(p + 12);
p += (p[0] & 0xf) << 2;
u->sport = p[0] << 8 | p[1];
u->dport = p[2] << 8 | p[3];
u->len = p[4] << 8 | p[5];
if(u->len < 8)
continue;
u->len -= 8;
if(u->len >= sizeof(u->data))
u->len = sizeof(u->data);
memcpy(u->data, p + 8, u->len);
ethnext();
return u;
}
}
void
arpreq(void)
{
uchar *p;
arp(1, nil, tftpip);
timeren(ARPTIMEOUT);
for(;; ethnext()){
p = ethrx();
if(p == nil){
print("ARP timeout\n");
timeren(ARPTIMEOUT);
arp(1, nil, tftpip);
}
if(p[12] != 8 || p[13] != 6)
continue;
arpc(p);
if(tmac[0] != 0xff)
break;
}
timeren(-1);
}
void
dhcp(ulong *r)
{
udp *u;
uchar *p;
uchar type;
xid = 0xdeadbeef;
tftpip = 0;
dhcppkg(r, DHCPDISCOVER);
timeren(DHCPTIMEOUT);
for(;;){
u = udprx();
if(u == nil){
timeren(DHCPTIMEOUT);
dhcppkg(r, DHCPDISCOVER);
print("DHCP timeout\n");
}
p = u->data;
if(u->dport != 68 || p[0] != 2 || u32get(p + 4) != xid || u32get(p + 236) != 0x63825363)
continue;
p += 240;
type = 0;
dhcpip = 0;
for(; p < u->data + u->len && *p != 0xff; p += 2 + p[1])
switch(*p){
case 53:
type = p[2];
break;
case 54:
dhcpip = u32get(p + 2);
break;
}
if(type != DHCPOFFER)
continue;
p = u->data;
if(p[108] == 0){
print("Offer from %I for %I with no boot file\n", dhcpip, u32get(p + 16));
continue;
}
myip = u32get(p + 16);
tftpip = u32get(p + 20);
memcpy(file, p + 108, 128);
print("Offer from %I for %I with boot file '%s' at %I\n", dhcpip, myip, file, tftpip);
break;
}
timeren(-1);
dhcppkg(r, DHCPREQUEST);
}
udp *
tftppkg(void)
{
udp *u;
u = &ubuf;
memcpy(u->edest, tmac, 6);
memcpy(u->esrc, mac, 6);
u->idest = tftpip;
u->isrc = myip;
u->sport = 69;
u->dport = 69;
return u;
}
void
tftp(ulong *r, char *q, uintptr base)
{
udp *u, *v;
uchar *p;
int bn, len;
restart:
u = tftppkg();
p = u->data;
*p++ = 0;
*p++ = 1;
do
*p++ = *q;
while(*q++ != 0);
memcpy(p, "octet", 6);
p += 6;
u->len = p - u->data;
udptx(r, u);
timeren(TFTPTIMEOUT);
for(;;){
v = udprx();
if(v == nil){
print("TFTP timeout");
goto restart;
}
if(v->dport != 69 || v->isrc != tftpip || v->idest != myip)
continue;
if(v->data[0] != 0)
continue;
switch(v->data[1]){
case 3:
bn = v->data[2] << 8 | v->data[3];
len = v->len - 4;
if(len < 0)
continue;
if(len > 512)
len = 512;
memcpy((char*)base + ((bn - 1) << 9), v->data + 4, len);
if((bn & 127) == 0)
putc('.');
p = u->data;
*p++ = 0;
*p++ = 4;
*p++ = bn >> 8;
*p = bn;
u->len = 4;
udptx(r, u);
if(len < 512){
putc(10);
timeren(-1);
return;
}
timeren(TFTPTIMEOUT);
break;
case 5:
v->data[v->len - 1] = 0;
print("TFTP error: %s\n", v->data + 4);
timeren(-1);
return;
}
}
}
int
netboot(void)
{
ethinit(eth0);
myip = 0;
dhcp(eth0);
arpreq();
tftp(eth0, file, TZERO);
memset((void *) CONF, 0, CONFSIZE);
tftp(eth0, "/cfg/pxe/0ea7deadbeef", CONF);
return 1;
}