ref: 75c92428225428c8fde2d015f010e608a0b12f1d
dir: /os/pc/etherrhine.c/
/*
Via Rhine driver, written for VT6102.
Uses the ethermii to control PHY.
Currently always copies on both, tx and rx.
rx side could be copy-free, and tx-side might be made
(almost) copy-free by using (possibly) two descriptors (if it allows
arbitrary tx lengths, which it should..): first for alignment and
second for rest of the frame. Rx-part should be worth doing.
*/
#include "u.h"
#include "../port/lib.h"
#include "mem.h"
#include "dat.h"
#include "fns.h"
#include "io.h"
#include "../port/error.h"
#include "../port/netif.h"
#include "etherif.h"
#include "ethermii.h"
typedef struct Desc Desc;
typedef struct Ctlr Ctlr;
enum {
Ntxd = 16,
Nrxd = 64,
Nwait = 50,
Ntxstats = 9,
Nrxstats = 8,
BIGSTR = 8192,
};
struct Desc {
ulong stat;
ulong size;
ulong addr;
ulong next;
char *buf;
ulong pad[3];
};
struct Ctlr {
Pcidev *pci;
int attached;
int txused;
int txhead;
int txtail;
int rxtail;
ulong port;
Mii mii;
ulong txstats[Ntxstats];
ulong rxstats[Nrxstats];
Desc *txd; /* wants to be aligned on 16-byte boundary */
Desc *rxd;
QLock attachlck;
Lock lock;
};
#define ior8(c, r) (inb((c)->port+(r)))
#define ior16(c, r) (ins((c)->port+(r)))
#define ior32(c, r) (inl((c)->port+(r)))
#define iow8(c, r, b) (outb((c)->port+(r), (int)(b)))
#define iow16(c, r, w) (outs((c)->port+(r), (ushort)(w)))
#define iow32(c, r, l) (outl((c)->port+(r), (ulong)(l)))
enum Regs {
Eaddr = 0x0,
Rcr = 0x6,
Tcr = 0x7,
Cr = 0x8,
Isr = 0xc,
Imr = 0xe,
McastAddr = 0x10,
RxdAddr = 0x18,
TxdAddr = 0x1C,
Bcr = 0x6e,
RhineMiiPhy = 0x6C,
RhineMiiSr = 0x6D,
RhineMiiCr = 0x70,
RhineMiiAddr = 0x71,
RhineMiiData = 0x72,
Eecsr = 0x74,
ConfigB = 0x79,
ConfigD = 0x7B,
MiscCr = 0x80,
HwSticky = 0x83,
MiscIsr = 0x84,
MiscImr = 0x86,
WolCrSet = 0xA0,
WolCfgSet = 0xA1,
WolCgSet = 0xA3,
WolCrClr = 0xA4,
PwrCfgClr = 0xA5,
WolCgClr = 0xA7,
};
enum Rcrbits {
RxErrX = 1<<0,
RxSmall = 1<<1,
RxMcast = 1<<2,
RxBcast = 1<<3,
RxProm = 1<<4,
RxFifo64 = 0<<5, RxFifo32 = 1<<5, RxFifo128 = 2<<5, RxFifo256 = 3<<5,
RxFifo512 = 4<<5, RxFifo768 = 5<<5, RxFifo1024 = 6<<5,
RxFifoStoreForward = 7<<5,
};
enum Tcrbits {
TxLoopback0 = 1<<1,
TxLoopback1 = 1<<2,
TxBackoff = 1<<3,
TxFifo128 = 0<<5, TxFifo256 = 1<<5, TxFifo512 = 2<<5, TxFifo1024 = 3<<5,
TxFifoStoreForward = 7<<5,
};
enum Crbits {
Init = 1<<0,
Start = 1<<1,
Stop = 1<<2,
RxOn = 1<<3,
TxOn = 1<<4,
Tdmd = 1<<5,
Rdmd = 1<<6,
EarlyRx = 1<<8,
Reserved0 = 1<<9,
FullDuplex = 1<<10,
NoAutoPoll = 1<<11,
Reserved1 = 1<<12,
Tdmd1 = 1<<13,
Rdmd1 = 1<<14,
Reset = 1<<15,
};
enum Isrbits {
RxOk = 1<<0,
TxOk = 1<<1,
RxErr = 1<<2,
TxErr = 1<<3,
TxBufUdf = 1<<4,
RxBufLinkErr = 1<<5,
BusErr = 1<<6,
CrcOvf = 1<<7,
EarlyRxInt = 1<<8,
TxFifoUdf = 1<<9,
RxFifoOvf = 1<<10,
TxPktRace = 1<<11,
NoRxbuf = 1<<12,
TxCollision = 1<<13,
PortCh = 1<<14,
GPInt = 1<<15
};
enum Bcrbits {
Dma32 = 0<<0, Dma64 = 1<<0, Dma128 = 2<<0,
Dma256 = 3<<0, Dma512 = 4<<0, Dma1024 = 5<<0,
DmaStoreForward = 7<<0,
DupRxFifo0 = 1<<3, DupRxFifo1 = 1<<4, DupRxFifo2 = 1<<5,
ExtraLed = 1<<6,
MediumSelect = 1<<7,
PollTimer0 = 1<<8, PollTimer1 = 1<<9, PollTimer2 = 1<<10,
DupTxFifo0 = 1<<11, DupTxFifo1 = 1<<12, DupTxFifo2 = 1<<13,
};
enum Eecsrbits {
EeAutoLoad = 1<<5,
};
enum MiscCrbits {
Timer0Enable= 1<<0,
Timer0Suspend = 1<<1,
HalfDuplexFlowControl = 1<<2,
FullDuplexFlowControl = 1<<3,
Timer1Enable = 1<<8,
ForceSoftReset = 1<<14,
};
enum HwStickybits {
StickyDS0 = 1<<0,
StickyDS1 = 1<<1,
WOLEna = 1<<2,
WOLStat = 1<<3,
};
enum WolCgbits {
PmeOvr = 1<<7,
};
enum Descbits {
OwnNic = 1<<31, /* stat */
TxAbort = 1<<8, /* stat */
TxError = 1<<15, /* stat */
RxChainbuf = 1<<10, /* stat */
RxChainStart = 1<<9, /* stat */
RxChainEnd = 1<<8, /* stat */
Chainbuf = 1<<15, /* size rx & tx*/
TxDisableCrc = 1<<16, /* size */
TxChainStart = 1<<21, /* size */
TxChainEnd = 1<<22, /* size */
TxInt = 1<<23, /* size */
};
enum ConfigDbits {
BackoffOptional = 1<<0,
BackoffAMD = 1<<1,
BackoffDEC = 1<<2,
BackoffRandom = 1<<3,
PmccTestMode = 1<<4,
PciReadlineCap = 1<<5,
DiagMode = 1<<6,
MmioEnable = 1<<7,
};
enum ConfigBbits {
LatencyTimer = 1<<0,
WriteWaitState = 1<<1,
ReadWaitState = 1<<2,
RxArbit = 1<<3,
TxArbit = 1<<4,
NoMemReadline = 1<<5,
NoParity = 1<<6,
NoTxQueuing = 1<<7,
};
enum RhineMiiCrbits {
Mdc = 1<<0,
Mdi = 1<<1,
Mdo = 1<<2,
Mdout = 1<<3,
Mdpm = 1<<4,
Wcmd = 1<<5,
Rcmd = 1<<6,
Mauto = 1<<7,
};
enum RhineMiiSrbits {
Speed10M = 1<<0,
LinkFail = 1<<1,
PhyError = 1<<3,
DefaultPhy = 1<<4,
ResetPhy = 1<<7,
};
enum RhineMiiAddrbits {
Mdone = 1<<5,
Msrcen = 1<<6,
Midle = 1<<7,
};
static char *
txstatnames[Ntxstats] = {
"aborts (excess collisions)",
"out of window collisions",
"carrier sense losses",
"fifo underflows",
"invalid descriptor format or underflows",
"system errors",
"reserved",
"transmit errors",
"collisions",
};
static char *
rxstatnames[Nrxstats] = {
"receiver errors",
"crc errors",
"frame alignment errors",
"fifo overflows",
"long packets",
"run packets",
"system errors",
"buffer underflows",
};
static void
attach(Ether *edev)
{
Ctlr *ctlr;
Desc *txd, *rxd, *td, *rd;
Mii *mi;
MiiPhy *phy;
int i, s;
ctlr = edev->ctlr;
qlock(&ctlr->attachlck);
if (ctlr->attached == 0) {
txd = ctlr->txd;
rxd = ctlr->rxd;
for (i = 0; i < Ntxd; ++i) {
td = &txd[i];
td->next = PCIWADDR(&txd[(i+1) % Ntxd]);
td->buf = xspanalloc(sizeof(Etherpkt)+4, 4, 0);
td->addr = PCIWADDR(td->buf);
td->size = 0;
coherence();
td->stat = 0;
}
for (i = 0; i < Nrxd; ++i) {
rd = &rxd[i];
rd->next = PCIWADDR(&rxd[(i+1) % Nrxd]);
rd->buf = xspanalloc(sizeof(Etherpkt)+4, 4, 0);
rd->addr = PCIWADDR(rd->buf);
rd->size = sizeof(Etherpkt)+4;
coherence();
rd->stat = OwnNic;
}
ctlr->txhead = ctlr->txtail = ctlr->rxtail = 0;
mi = &ctlr->mii;
miistatus(mi);
phy = mi->curphy;
s = splhi();
iow32(ctlr, TxdAddr, PCIWADDR(&txd[0]));
iow32(ctlr, RxdAddr, PCIWADDR(&rxd[0]));
iow16(ctlr, Cr, (phy->fd ? FullDuplex : 0) | NoAutoPoll | TxOn | RxOn | Start | Rdmd);
iow16(ctlr, Isr, 0xFFFF);
iow16(ctlr, Imr, 0xFFFF);
iow8(ctlr, MiscIsr, 0xFF);
iow8(ctlr, MiscImr, ~(3<<5));
splx(s);
}
ctlr->attached++;
qunlock(&ctlr->attachlck);
}
static void
txstart(Ether *edev)
{
Ctlr *ctlr;
Desc *txd, *td;
Block *b;
int i, txused, n;
ulong size;
ctlr = edev->ctlr;
txd = ctlr->txd;
i = ctlr->txhead;
txused = ctlr->txused;
n = 0;
while (txused < Ntxd) {
if ((b = qget(edev->oq)) == nil)
break;
td = &txd[i];
size = BLEN(b);
memmove(td->buf, b->rp, size);
freeb(b);
td->size = size | TxChainStart | TxChainEnd | TxInt; /* could reduce number of ints here */
coherence();
td->stat = OwnNic;
i = (i + 1) % Ntxd;
txused++;
n++;
}
if (n)
iow16(ctlr, Cr, ior16(ctlr, Cr) | Tdmd);
ctlr->txhead = i;
ctlr->txused = txused;
}
static void
transmit(Ether *edev)
{
Ctlr *ctlr;
ctlr = edev->ctlr;
ilock(&ctlr->lock);
txstart(edev);
iunlock(&ctlr->lock);
}
static void
txcomplete(Ether *edev)
{
Ctlr *ctlr;
Desc *txd, *td;
int i, txused, j;
ulong stat;
ctlr = edev->ctlr;
txd = ctlr->txd;
txused = ctlr->txused;
i = ctlr->txtail;
while (txused > 0) {
td = &txd[i];
stat = td->stat;
if (stat & OwnNic)
break;
ctlr->txstats[Ntxstats-1] += stat & 0xF;
for (j = 0; j < Ntxstats-1; ++j)
if (stat & (1<<(j+8)))
ctlr->txstats[j]++;
i = (i + 1) % Ntxd;
txused--;
}
ctlr->txused = txused;
ctlr->txtail = i;
if (txused <= Ntxd/2)
txstart(edev);
}
static void
interrupt(Ureg *, void *arg)
{
Ether *edev;
Ctlr *ctlr;
ushort isr, misr;
ulong stat;
Desc *rxd, *rd;
int i, n, j;
edev = (Ether*)arg;
ctlr = edev->ctlr;
iow16(ctlr, Imr, 0);
isr = ior16(ctlr, Isr);
iow16(ctlr, Isr, 0xFFFF);
misr = ior16(ctlr, MiscIsr) & ~(3<<5); /* don't care about used defined ints */
if (isr & RxOk) {
Block *b;
int size;
rxd = ctlr->rxd;
i = ctlr->rxtail;
n = 0;
while ((rxd[i].stat & OwnNic) == 0) {
rd = &rxd[i];
stat = rd->stat;
for (j = 0; j < Nrxstats; ++j)
if (stat & (1<<j))
ctlr->rxstats[j]++;
if (stat & 0xFF)
iprint("rx: %lux\n", stat & 0xFF);
size = ((rd->stat>>16) & 2047) - 4;
b = iallocb(sizeof(Etherpkt));
memmove(b->wp, rd->buf, size);
b->wp += size;
etheriq(edev, b, 1);
rd->size = sizeof(Etherpkt)+4;
coherence();
rd->stat = OwnNic;
i = (i + 1) % Nrxd;
n++;
}
if (n)
iow16(ctlr, Cr, ior16(ctlr, Cr) | Rdmd);
ctlr->rxtail = i;
isr &= ~RxOk;
}
if (isr & TxOk) {
txcomplete(edev);
isr &= ~TxOk;
}
if (isr | misr)
iprint("etherrhine: unhandled irq(s). isr:%x misr:%x\n", isr, misr);
iow16(ctlr, Imr, 0xFFFF);
}
static void
promiscuous(void *arg, int enable)
{
Ether *edev;
Ctlr *ctlr;
edev = arg;
ctlr = edev->ctlr;
ilock(&ctlr->lock);
iow8(ctlr, Rcr, (ior8(ctlr, Rcr) & ~(RxProm|RxBcast)) |
(enable ? RxProm : RxBcast));
iunlock(&ctlr->lock);
}
static int
miiread(Mii *mii, int phy, int reg)
{
Ctlr *ctlr;
int n;
ctlr = mii->ctlr;
n = Nwait;
while (n-- && ior8(ctlr, RhineMiiCr) & (Rcmd | Wcmd))
microdelay(1);
if (n == Nwait)
iprint("etherrhine: miiread: timeout\n");
iow8(ctlr, RhineMiiCr, 0);
iow8(ctlr, RhineMiiPhy, phy);
iow8(ctlr, RhineMiiAddr, reg);
iow8(ctlr, RhineMiiCr, Rcmd);
n = Nwait;
while (n-- && ior8(ctlr, RhineMiiCr) & Rcmd)
microdelay(1);
if (n == Nwait)
iprint("etherrhine: miiread: timeout\n");
n = ior16(ctlr, RhineMiiData);
return n;
}
static int
miiwrite(Mii *mii, int phy, int reg, int data)
{
int n;
Ctlr *ctlr;
ctlr = mii->ctlr;
n = Nwait;
while (n-- && ior8(ctlr, RhineMiiCr) & (Rcmd | Wcmd))
microdelay(1);
if (n == Nwait)
iprint("etherrhine: miiwrite: timeout\n");
iow8(ctlr, RhineMiiCr, 0);
iow8(ctlr, RhineMiiPhy, phy);
iow8(ctlr, RhineMiiAddr, reg);
iow16(ctlr, RhineMiiData, data);
iow8(ctlr, RhineMiiCr, Wcmd);
n = Nwait;
while (n-- && ior8(ctlr, RhineMiiCr) & Wcmd)
microdelay(1);
if (n == Nwait)
iprint("etherrhine: miiwrite: timeout\n");
return 0;
}
/* multicast already on, don't need to do anything */
static void
multicast(void*, uchar*, int)
{
}
static void
shutdown(Ether *edev)
{
int i;
Ctlr *ctlr = edev->ctlr;
ilock(&ctlr->lock);
pcisetbme(ctlr->pci);
iow16(ctlr, Cr, ior16(ctlr, Cr) | Stop);
iow16(ctlr, Cr, ior16(ctlr, Cr) | Reset);
for (i = 0; i < Nwait; ++i) {
if ((ior16(ctlr, Cr) & Reset) == 0)
break;
delay(5);
}
if (i == Nwait)
iprint("etherrhine: reset timeout\n");
iunlock(&ctlr->lock);
}
static void
init(Ether *edev)
{
Ctlr *ctlr;
MiiPhy *phy;
int i;
shutdown(edev);
ctlr = edev->ctlr;
ilock(&ctlr->lock);
iow8(ctlr, Eecsr, ior8(ctlr, Eecsr) | EeAutoLoad);
for (i = 0; i < Nwait; ++i) {
if ((ior8(ctlr, Eecsr) & EeAutoLoad) == 0)
break;
delay(5);
}
if (i == Nwait)
iprint("etherrhine: eeprom autoload timeout\n");
for (i = 0; i < Eaddrlen; ++i)
edev->ea[i] = ior8(ctlr, Eaddr + i);
ctlr->mii.mir = miiread;
ctlr->mii.miw = miiwrite;
ctlr->mii.ctlr = ctlr;
if(mii(&ctlr->mii, ~0) == 0 || ctlr->mii.curphy == nil){
iprint("etherrhine: init mii failure\n");
return;
}
for (i = 0; i < NMiiPhy; ++i)
if (ctlr->mii.phy[i])
if (ctlr->mii.phy[i]->oui != 0xFFFFF)
ctlr->mii.curphy = ctlr->mii.phy[i];
miistatus(&ctlr->mii);
phy = ctlr->mii.curphy;
edev->mbps = phy->speed;
iow16(ctlr, Imr, 0);
iow16(ctlr, Cr, ior16(ctlr, Cr) | Stop);
iow8(ctlr, Rcr, ior8(ctlr, Rcr) | RxMcast);
iunlock(&ctlr->lock);
}
static Pcidev *
rhinematch(ulong)
{
static int nrhines = 0;
int nfound = 0;
Pcidev *p = nil;
while (p = pcimatch(p, 0x1106, 0))
if (p->did == 0x3065)
if (++nfound > nrhines) {
nrhines++;
break;
}
return p;
}
static long
ifstat(Ether* edev, void* a, long n, ulong offset)
{
int l = 0, i;
char *p;
Ctlr *ctlr;
ctlr = edev->ctlr;
p = malloc(BIGSTR);
for (i = 0; i < Ntxstats; ++i)
if (txstatnames[i])
l += snprint(p+l, BIGSTR - l, "tx: %s: %lud\n", txstatnames[i], ctlr->txstats[i]);
for (i = 0; i < Nrxstats; ++i)
if (rxstatnames[i])
l += snprint(p+l, BIGSTR - l, "rx: %s: %lud\n", rxstatnames[i], ctlr->rxstats[i]);
/*
for (i = 0; i < NMiiPhyr; ++i) {
if ((i % 8) == 0)
l += snprint(p + l, BIGSTR - l, "\nmii 0x%02x:", i);
reg=miimir(&ctlr->mii, i);
reg=miimir(&ctlr->mii, i);
l += snprint(p + l, BIGSTR - l, " %4ux", reg);
}
for (i = 0; i < 0x100; i+=1) {
if ((i % 16) == 0)
l += snprint(p + l, BIGSTR - l, "\nreg 0x%02x:", i);
else if ((i % 2) == 0)
l += snprint(p + l, BIGSTR - l, " ");
reg=ior8(ctlr, i);
l += snprint(p + l, BIGSTR - l, "%02x", reg);
}
l += snprint(p + l, BIGSTR - l, " \n");
*/
n = readstr(offset, a, n, p);
free(p);
return n;
}
static int
pnp(Ether *edev)
{
Pcidev *p;
Ctlr *ctlr;
ulong port;
ulong size;
p = rhinematch(edev->port);
if (p == nil)
return -1;
port = p->mem[0].bar & ~1;
size = p->mem[0].size;
if (ioalloc(port, size, 0, "rhine") < 0) {
print("etherrhine: couldn't allocate port %lud\n", port);
return -1;
}
if ((ctlr = malloc(sizeof(Ctlr))) == nil) {
print("etherrhine: couldn't allocate memory for ctlr\n");
return -1;
}
memset(ctlr, 0, sizeof(Ctlr));
ctlr->txd = xspanalloc(sizeof(Desc) * Ntxd, 16, 0);
ctlr->rxd = xspanalloc(sizeof(Desc) * Nrxd, 16, 0);
ctlr->pci = p;
ctlr->port = port;
edev->ctlr = ctlr;
edev->port = ctlr->port;
edev->irq = p->intl;
edev->tbdf = p->tbdf;
init(edev);
edev->interrupt = interrupt;
edev->arg = edev;
edev->attach = attach;
edev->transmit = transmit;
edev->ifstat = ifstat;
edev->promiscuous = promiscuous;
edev->multicast = multicast;
edev->shutdown = shutdown;
return 0;
}
void
etherrhinelink(void)
{
addethercard("rhine", pnp);
}