ref: 54bac038f411c10a596adf84c06df32f8c7c4c53
dir: /os/manga/etherks8695.c/
/*
* KS8695P ethernet
* WAN port, LAN port to 4-port switch
*/
#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 "ureg.h"
#define DBG if(0)iprint
#define MIIDBG if(0)iprint
enum {
Nrdre = 64, /* receive descriptor ring entries */
Ntdre = 32, /* transmit descriptor ring entries */
Rbsize = ROUNDUP(ETHERMAXTU+4, 4), /* ring buffer size (+4 for CRC), must be multiple of 4 */
Bufsize = ROUNDUP(Rbsize, CACHELINESZ), /* keep start and end at cache lines */
};
typedef struct DmaReg DmaReg;
struct DmaReg {
ulong dtxc; /* transmit control register */
ulong drxc; /* receive control register */
ulong dtsc; /* transmit start command register */
ulong drsc; /* receive start command register */
ulong tdlb; /* transmit descriptor list base address */
ulong rdlb; /* receive descriptor list base address */
ulong mal; /* mac address low (4 bytes) */
ulong mah; /* mac address high (2 bytes) */
ulong pad[0x80-0x20];
/* pad to 0x80 for */
ulong maal[16][2]; /* additional mac addresses */
};
enum {
/* dtxc */
TxSoftReset= 1<<31,
/* 29:24 is burst size in words; 0, 1, 2, 4, 8, 16, 32; 0=unlimited */
TxUDPck= 1<<18, /* generate UDP, TCP, IP check sum */
TxTCPck= 1<<17,
TxIPck= 1<<16,
TxFCE= 1<<9, /* transmit flow control enable */
TxLB= 1<<8, /* loop back */
TxEP= 1<<2, /* enable padding */
TxCrc= 1<<1, /* add CRC */
TxEnable= 1<<0, /* enable Tx block */
/* drxc */
/* 29:24 is burst size in words */
RxUDPck= 1<<18, /* check UDP, TCP, IP check sum */
RxTCPck= 1<<17,
RxIPck= 1<<16,
RxFCE= 1<<9, /* flow control enable */
RxRB= 1<<6, /* receive broadcast */
RxRM= 1<<5, /* receive multicast (including broadcast) */
RxRU= 1<<4, /* receive unicast */
RxAE= 1<<3, /* receive error frames */
RxRA= 1<<2, /* receive all */
RxEnable= 1<<0, /* enable Rx block */
};
typedef struct WanPhy WanPhy;
struct WanPhy {
ulong did; /* device ID */
ulong rid; /* revision ID */
ulong pad0; /* miscellaneous control in plain 8695 (not P or X) */
ulong wmc; /* WAN miscellaneous control */
ulong wppm; /* phy power management */
ulong wpc; /* phys ctl */
ulong wps; /* phys status */
ulong pps; /* phy power save */
};
enum {
/* wmc */
WAnc= 1<<30, /* auto neg complete */
WAnr= 1<<29, /* auto neg restart */
WAnaP= 1<<28, /* advertise pause */
WAna100FD= 1<<27, /* advertise 100BASE-TX FD */
WAna100HD= 1<<26, /* advertise 100BASE-TX */
WAna10FD= 1<<25, /* advertise 10BASE-TX FD */
WAna10HD= 1<<24, /* advertise 10BASE-TX */
WLs= 1<<23, /* link status */
WDs= 1<<22, /* duplex status (resolved) */
WSs= 1<<21, /* speed status (resolved) */
WLparP= 1<<20, /* link partner pause */
WLpar100FD= 1<<19, /* link partner 100BASE-TX FD */
WLpar100HD= 1<<18,
WLpar10FD= 1<<17,
WLpar10HD= 1<<16,
WAnDis= 1<<15, /* auto negotiation disable */
WForce100= 1<<14,
WForceFD= 1<<13,
/* 6:4 LED1 select */
/* 2:0 LED0 select */
/* LED select */
LedSpeed= 0,
LedLink,
LedFD, /* full duplex */
LedColl, /* collision */
LedTxRx, /* activity */
LedFDColl, /* FD/collision */
LedLinkTxRx, /* link and activity */
/* ppm */
WLpbk= 1<<14, /* local (MAC) loopback */
WRlpblk= 1<<13, /* remote (PHY) loopback */
WPhyIso= 1<<12, /* isolate PHY from MII and Tx+/Tx- */
WPhyLink= 1<<10, /* force link in PHY */
WMdix= 1<<9, /* =1, MDIX, =0, MDX */
WFef= 1<<8, /* far end fault */
WAmdixp= 1<<7, /* disable IEEE spec for auto-neg MDIX */
WTxdis= 1<<6, /* disable port's transmitter */
WDfef= 1<<5, /* disable far end fault detection */
Wpd= 1<<4, /* power down */
WDmdx= 1<<3, /* disable auto MDI/MDIX */
WFmdx= 1<<2, /* if auto disabled, force MDIX */
WMlpbk= 1<<1, /* local loopback */
/* pps */
Ppsm= 1<<0, /* enable PHY power save mode */
};
#define DMABURST(n) ((n)<<24)
typedef struct {
Lock;
int port;
int init;
int active;
int reading; /* device read process is active */
ulong anap; /* auto negotiate result */
DmaReg* regs;
WanPhy* wphy;
Ring;
ulong interrupts; /* statistics */
ulong deferred;
ulong heartbeat;
ulong latecoll;
ulong retrylim;
ulong underrun;
ulong overrun;
ulong carrierlost;
ulong retrycount;
} Ctlr;
static void switchinit(uchar*);
static void switchdump(void);
static void
attach(Ether *ether)
{
Ctlr *ctlr;
ctlr = ether->ctlr;
ilock(ctlr);
if(!ctlr->active){
/* TO DO: rx/tx enable */
ctlr->regs->dtxc |= TxEnable;
ctlr->regs->drxc |= RxEnable;
microdelay(10);
ctlr->regs->drsc = 1; /* start read process */
microdelay(10);
ctlr->reading = (INTRREG->st & (1<<IRQwmrps)) == 0;
ctlr->active = 1;
}
iunlock(ctlr);
}
static void
closed(Ether *ether)
{
Ctlr *ctlr;
ctlr = ether->ctlr;
if(ctlr->active){
ilock(ctlr);
iprint("ether closed\n");
ctlr->regs->dtxc &= ~TxEnable;
ctlr->regs->drxc &= ~RxEnable;
/* TO DO: reset ring? */
/* TO DO: could wait? */
ctlr->active = 0;
iunlock(ctlr);
}
}
static void
promiscuous(void* arg, int on)
{
Ether *ether;
Ctlr *ctlr;
ulong w;
ether = (Ether*)arg;
ctlr = ether->ctlr;
ilock(ctlr);
/* TO DO: must disable reader */
w = ctlr->regs->drxc;
if(on != ((w&RxRA)!=0)){
/* TO DO: must disable reader */
ctlr->regs->drxc = w ^ RxRA;
/* TO DO: restart reader */
}
iunlock(ctlr);
}
static void
multicast(void* arg, uchar *addr, int on)
{
Ether *ether;
Ctlr *ctlr;
USED(addr, on); /* if on, could SetGroupAddress; if !on, it's hard */
ether = (Ether*)arg;
ctlr = ether->ctlr;
ilock(ctlr);
/* TO DO: must disable reader */
/* TO DO: use internal multicast tables? (probably needs LRU or some such) */
if(ether->nmaddr)
ctlr->regs->drxc |= RxRM;
else
ctlr->regs->drxc &= ~RxRM;
iunlock(ctlr);
}
static void
txstart(Ether *ether)
{
int len;
Ctlr *ctlr;
Block *b;
BD *dre;
ctlr = ether->ctlr;
while(ctlr->ntq < ctlr->ntdre-1){
b = qget(ether->oq);
if(b == 0)
break;
dre = &ctlr->tdr[ctlr->tdrh];
if(dre->ctrl & BdBusy)
panic("ether: txstart");
/*
* Give ownership of the descriptor to the chip, increment the
* software ring descriptor pointer and tell the chip to poll.
*/
len = BLEN(b);
if(ctlr->txb[ctlr->tdrh] != nil)
panic("etherks8695: txstart");
ctlr->txb[ctlr->tdrh] = b;
dcflush(b->rp, len);
dre->addr = PADDR(b->rp);
dre->size = TxIC|TxFS|TxLS | len;
dre->ctrl = BdBusy;
ctlr->regs->dtsc = 1; /* go for it */
ctlr->ntq++;
ctlr->tdrh = NEXT(ctlr->tdrh, ctlr->ntdre);
}
}
static void
transmit(Ether* ether)
{
Ctlr *ctlr;
ctlr = ether->ctlr;
ilock(ctlr);
txstart(ether);
iunlock(ctlr);
}
/*
* allocate receive buffer space on cache-line boundaries
*/
static Block*
clallocb(void)
{
Block *b;
b = iallocb(Bufsize+CACHELINESZ-1);
if(b == nil)
return b;
dcflush(b->base, BALLOC(b));
b->wp = b->rp = (uchar*)(((ulong)b->base + CACHELINESZ - 1) & ~(CACHELINESZ-1));
return b;
}
static void
rxring(Ureg*, void *arg)
{
Ether *ether;
ulong status;
Ctlr *ctlr;
BD *dre;
Block *b, *rb;
ether = arg;
ctlr = ether->ctlr;
ctlr->interrupts++;
/*
* Receiver interrupt: run round the descriptor ring logging
* errors and passing valid receive data up to the higher levels
* until we encounter a descriptor still owned by the chip.
* We rely on the descriptor accesses being uncached.
*/
dre = &ctlr->rdr[ctlr->rdrx];
while(((status = dre->ctrl) & BdBusy) == 0){
if(status & RxES || (status & (RxFS|RxLS)) != (RxFS|RxLS)){
if(status & (RxRF|RxTL))
ether->buffs++;
if(status & RxRE)
ether->frames++;
if(status & RxCE)
ether->crcs++;
//if(status & RxOverrun)
// ether->overflows++;
iprint("eth rx: %lux\n", status);
}else{
/*
* We have a packet. Read it in.
*/
b = clallocb();
if(b != nil){
rb = ctlr->rxb[ctlr->rdrx];
rb->wp += (dre->ctrl & RxFL)-4;
etheriq(ether, rb, 1);
ctlr->rxb[ctlr->rdrx] = b;
dre->addr = PADDR(b->wp);
}else
ether->soverflows++;
}
/*
* Finished with this descriptor,
* give it back to the chip, then on to the next...
*/
dre->ctrl = BdBusy;
ctlr->rdrx = NEXT(ctlr->rdrx, ctlr->nrdre);
dre = &ctlr->rdr[ctlr->rdrx];
}
}
static void
txring(Ureg*, void *arg)
{
Ether *ether;
Ctlr *ctlr;
BD *dre;
Block *b;
ether = arg;
ctlr = ether->ctlr;
ctlr->interrupts++;
/*
* Transmitter interrupt: handle anything queued for a free descriptor.
*/
lock(ctlr);
while(ctlr->ntq){
dre = &ctlr->tdr[ctlr->tdri];
if(dre->ctrl & BdBusy)
break;
/* statistics are kept inside the device, but only for LAN */
/* there seems to be no per-packet error status for transmission */
b = ctlr->txb[ctlr->tdri];
if(b == nil)
panic("etherks8695: bufp");
ctlr->txb[ctlr->tdri] = nil;
freeb(b);
ctlr->ntq--;
ctlr->tdri = NEXT(ctlr->tdri, ctlr->ntdre);
}
txstart(ether);
unlock(ctlr);
}
/*
* receive buffer unavailable (overrun)
*/
static void
rbuintr(Ureg*, void *arg)
{
Ether *ether;
Ctlr *ctlr;
ether = arg;
ctlr = ether->ctlr;
ctlr->interrupts++;
if(ctlr->active)
ctlr->overrun++;
ctlr->reading = 0;
}
/*
* read process (in device) stopped
*/
static void
rxstopintr(Ureg*, void *arg)
{
Ether *ether;
Ctlr *ctlr;
ether = arg;
ctlr = ether->ctlr;
ctlr->interrupts++;
if(!ctlr->active)
return;
iprint("rxstopintr\n");
ctlr->regs->drsc = 1;
/* just restart it? need to fiddle with ring? */
}
static void
txstopintr(Ureg*, void *arg)
{
Ether *ether;
Ctlr *ctlr;
ether = arg;
ctlr = ether->ctlr;
ctlr->interrupts++;
if(!ctlr->active)
return;
iprint("txstopintr\n");
ctlr->regs->dtsc = 1;
/* just restart it? need to fiddle with ring? */
}
static void
linkchangeintr(Ureg*, void*)
{
iprint("link change\n");
}
static long
ifstat(Ether* ether, void* a, long n, ulong offset)
{
char *p;
int len;
Ctlr *ctlr;
if(n == 0)
return 0;
ctlr = ether->ctlr;
p = malloc(READSTR);
len = snprint(p, READSTR, "interrupts: %lud\n", ctlr->interrupts);
len += snprint(p+len, READSTR-len, "carrierlost: %lud\n", ctlr->carrierlost);
len += snprint(p+len, READSTR-len, "heartbeat: %lud\n", ctlr->heartbeat);
len += snprint(p+len, READSTR-len, "retrylimit: %lud\n", ctlr->retrylim);
len += snprint(p+len, READSTR-len, "retrycount: %lud\n", ctlr->retrycount);
len += snprint(p+len, READSTR-len, "latecollisions: %lud\n", ctlr->latecoll);
len += snprint(p+len, READSTR-len, "rxoverruns: %lud\n", ctlr->overrun);
len += snprint(p+len, READSTR-len, "txunderruns: %lud\n", ctlr->underrun);
{DmaReg *d = ctlr->regs; len += snprint(p+len, READSTR-len, "dtxc=%8.8lux drxc=%8.8lux\n", d->dtxc, d->drxc);}
snprint(p+len, READSTR-len, "framesdeferred: %lud\n", ctlr->deferred);
n = readstr(offset, a, n, p);
free(p);
if(ctlr->port == 1)
switchdump();
return n;
}
static void
physinit(Ether *ether, int force)
{
Ctlr *ctlr;
WanPhy *p;
ulong anap;
int i;
ctlr = ether->ctlr;
p = ctlr->wphy;
if(p == nil){
if(ctlr->port){
ether->mbps = 100;
ether->fullduplex = 1;
switchinit(nil);
}
return;
}
iprint("phy%d: wmc=%8.8lux wpm=%8.8lux wpc=%8.8lux wps=%8.8lux pps=%8.8lux\n", ctlr->port, p->wmc, p->wppm, p->wpc, p->wps, p->pps);
p->wppm = 0; /* enable power, other defaults seem fine */
if(p->rid & 7)
p->wpc = 0x0200b000; /* magic */
else
p->wpc = 0xb000;
if(p->wppm & WFef)
iprint("ether%d: far end fault\n", ctlr->port);
if((p->wmc & WLs) == 0){
iprint("ether%d: no link\n", ctlr->port);
ether->mbps = 100; /* could use 10, but this is 2005 */
ether->fullduplex = 0;
return;
}
if((p->wmc & WAnc) == 0 || force){
p->wmc = WAnr | WAnaP | WAna100FD | WAna100HD | WAna10FD | WAna10HD | (p->wmc & 0x7F);
microdelay(10);
if(p->wmc & WLs){
for(i=0;; i++){
if(i > 600){
iprint("ether%d: auto negotiation failed\n", ctlr->port);
ether->mbps = 10; /* we'll assume it's stupid */
ether->fullduplex = 0;
return;
}
if(p->wmc & WAnc){
microdelay(10);
break;
}
delay(1);
}
}
}
anap = p->wmc;
ether->mbps = anap & WSs? 100: 10;
if(anap & (WLpar100FD|WLpar10FD) && anap & WDs)
ether->fullduplex = 1;
else
ether->fullduplex = 0;
ctlr->anap = anap;
iprint("ks8695%d mii: fd=%d speed=%d wmc=%8.8lux\n", ctlr->port, ether->fullduplex, ether->mbps, anap);
}
static void
ctlrinit(Ctlr *ctlr, Ether *ether)
{
int i;
DmaReg *em;
ulong mode;
em = ctlr->regs;
/* soft reset */
em->dtxc = TxSoftReset;
microdelay(10);
for(i=0; em->dtxc & TxSoftReset; i++){
if(i > 20){
iprint("etherks8695.%d: soft reset failed\n", ctlr->port);
i=0;
}
microdelay(100);
}
iprint("%d: rx=%8.8lux tx=%8.8lux\n", ctlr->port, PADDR(ctlr->rdr), PADDR(ctlr->tdr));
physinit(ether, 0);
/* set ether address */
em->mah = (ether->ea[0]<<8) | ether->ea[1];
em->mal = (ether->ea[2]<<24) | (ether->ea[3]<<16) | (ether->ea[4]<<8) | ether->ea[5];
if(ctlr->port == 0){
/* clear other addresses for now */
for(i=0; i<nelem(em->maal); i++){
em->maal[i][0] = 0;
em->maal[i][1] = 0;
}
}
/* transmitter, enabled later by attach */
em->tdlb = PADDR(ctlr->tdr);
em->dtxc = DMABURST(8) | TxFCE | TxCrc; /* don't set TxEP: there is a h/w bug and it's anyway done by higher levels */
/* receiver, enabled later by attach */
em->rdlb = PADDR(ctlr->rdr);
mode = DMABURST(8) | RxRB | RxRU | RxAE; /* RxAE just there for testing */
if(ether->fullduplex)
mode |= RxFCE;
em->drxc = mode;
/* tx/rx enable is deferred until attach */
}
static int
reset(Ether* ether)
{
uchar ea[Eaddrlen];
char name[KNAMELEN];
Ctlr *ctlr;
int i, irqdelta;
snprint(name, sizeof(name), "ether%d", ether->ctlrno);
/*
* Insist that the platform-specific code provide the Ethernet address
*/
memset(ea, 0, Eaddrlen);
if(memcmp(ea, ether->ea, Eaddrlen) == 0){
print("%s (%s %ld): no ether address", name, ether->type, ether->port);
return -1;
}
ctlr = malloc(sizeof(*ctlr));
ctlr->port = ether->port;
switch(ether->port){
case 0:
ctlr->regs = KADDR(PHYSWANDMA);
ctlr->wphy = KADDR(PHYSMISC);
ctlr->wphy->wmc = (ctlr->wphy->wmc & ~0x7F) | (LedLinkTxRx<<0) | (LedSpeed<<4);
break;
case 1:
ctlr->regs = KADDR(PHYSLANDMA);
ctlr->wphy = nil;
break;
default:
print("%s: %s ether: no port %lud\n", name, ether->type, ether->port);
free(ctlr);
return -1;
}
ether->ctlr = ctlr;
irqdelta = ether->irq - IRQwmrps;
physinit(ether, 0);
if(ioringinit(ctlr, Nrdre, Ntdre) < 0)
panic("etherks8695 initring");
for(i = 0; i < ctlr->nrdre; i++){
if(ctlr->rxb[i] == nil)
ctlr->rxb[i] = clallocb();
ctlr->rdr[i].addr = PADDR(ctlr->rxb[i]->wp);
ctlr->rdr[i].size = Rbsize;
ctlr->rdr[i].ctrl = BdBusy;
}
ctlrinit(ctlr, ether);
ether->attach = attach;
ether->closed = closed;
ether->transmit = transmit;
ether->ifstat = ifstat;
/* there is more than one interrupt: we must enable some ourselves */
ether->irq = irqdelta + IRQwmrs; /* set main IRQ to receive status */
ether->interrupt = rxring;
intrenable(IRQ, irqdelta+IRQwmts, txring, ether, "ethertx");
// intrenable(IRQ, irqdelta+IRQwmtbu, tbuintr, ether, "ethertbu"); /* don't care? */
intrenable(IRQ, irqdelta+IRQwmrbu, rbuintr, ether, "etherrbu");
intrenable(IRQ, irqdelta+IRQwmrps, rxstopintr, ether, "etherrps");
intrenable(IRQ, irqdelta+IRQwmtps, txstopintr, ether, "ethertps");
if(ether->port == 0)
intrenable(IRQ, IRQwmlc, linkchangeintr, ether, "etherwanlink");
ether->arg = ether;
ether->promiscuous = promiscuous;
ether->multicast = multicast;
return 0;
}
/*
* switch engine registers
* a 10 microsecond delay is required after each (write?) access
*/
typedef struct Switch Switch;
struct Switch {
ulong sec0; /* control register 0 */
ulong sec1; /* control register 1 */
ulong sec2; /* control register 2, factory default, do not change */
ulong cfg[5][3]; /* port configuration registers */
ulong an[2]; /* ports 1 to 4 auto negotiation [1,2][3,4] */
ulong seiac; /* indirect access control register */
ulong seiadh2; /* indirect access data register 2 (4:0 is 68-64 of data) */
ulong seiadh1; /* indirect access data register 1 (63-32 of data) */
ulong seiadl; /* indirect access data register low */
ulong seafc; /* advanced feature control */
ulong scph; /* services code priority high (ie, TOS priority) */
ulong scpl; /* services code priority low */
ulong mah; /* switch MAC address high */
ulong mal; /* switch MAC address low */
ulong ppm[2]; /* ports 1 to 4 PHY power management */
};
enum {
/* Sec0 */
Nbe= 1<<31, /* new backoff (designed for UNH) enable */
/* 30:28 802.1p base priority */
/* 27:25 LAN LED1 select */
/* 24:22 LAN LED0 select */
Unh= 1<<21, /* =1, drop packets with type 8808 or DA=0180c2000001; =0, drop flow control */
Lca= 1<<20, /* link change age: faster aging for link->no link transition */
Paf= 1<<19, /* pass all frames, including bad ones */
Sfce= 1<<18, /* switch MII full-duplex flow control enable */
Flfc= 1<<17, /* frame length field check in IEEE (drop invalid ones) */
Bsm= 1<<16, /* =1, share all buffers; =0, use only 1/5 of pool */
Age= 1<<15, /* enable age function */
Agef= 1<<14, /* enable fast ageing */
Aboe= 1<<13, /* aggressive backoff enable */
Uvmd= 1<<12, /* unicast port-VLAN mismatch discard */
Mspd= 1<<11, /* multicast storm protection disable */
Bpm= 1<<10, /* =1, carrier sense backpressure; =0, collision backpressure */
Fair= 1<<9, /* fair flow control and back pressure */
Ncd= 1<<8, /* no excessive collision drop */
Lmpsd= 1<<7, /* 1=, drop packet sizes over 1536 bytes; =0, 1522 for tagged, 1518 untagged */
Pbr= 1<<6, /* priority buffer reserved */
Sbpe= 1<<5, /* switch back pressure enable */
Shdm= 1<<4, /* switch half duplex mode */
PrioHi= 0<<2, /* always deliver high priority first */
Prio10_1= 1<<2, /* high/low at 10:1 */
Prio5_1= 2<<2, /* high/low at 5:1 */
Prio2_1= 3<<2, /* high/low at 2:1 */
Etm= 1<<1, /* enable tag mask */
Esf= 1<<0, /* enable switch function */
/* sec1 */
/* 31:21 */ /* broadcast storm protection, byte count */
IEEEneg= 1<<11, /* follow IEEE spec for auto neg */
Tpid= 1<<10, /* special TPID mode used for direct forwarding from port 5 */
PhyEn= 1<<8, /* enable PHY MII */
TfcDis= 1<<7, /* disable IEEE transmit flow control */
RfcDis= 1<<6, /* disable IEEE receive flow control */
Hps= 1<<5, /* huge packet support: allow packets up to 1916 bytes */
VlanEn= 1<<4, /* 802.1Q VLAN enable; recommended when priority queue on */
Sw10BT= 1<<1, /* switch in 10 Mbps mode not 100 Mbps */
VIDrep= 1<<0, /* replace null VID with port VID (otherwise no replacement) */
};
#define BASEPRIO(n) (((n)&7)<<28)
enum {
/* cfg[n][0] (SEP1C1-SEP4C1) p. 89 */
/* 31:16 default tag: 31:29=userprio, 28=CFI bit, 27:16=VID[11:0] */
AnegDis= 1<<15, /* disable auto negotiation */
Force100= 1<<14, /* force 100BT when auto neg is disabled */
ForceFD= 1<<13, /* force full duplex when auto neg is disabled */
/* 12:8 port VLAN membership: bit 8 is port 1, bit 12 is port 5, 1=member */
STTxEn= 1<<7, /* spanning tree transmit enable */
STRxEn= 1<<6, /* spanning tree receive enable */
STLnDis= 1<<5, /* spanning tree learn disnable */
Bsp= 1<<4, /* enable broadcast storm protection */
Pce= 1<<3, /* priority classification enable */
Dpce= 1<<2, /* diffserv priority classification enable */
IEEEpce= 1<<1, /* IEEE (802.1p) classification enable */
PrioEn= 1<<0, /* enable priority function on port */
/* cfg[n][1] (SEP1C2-SEP4C2) p. 91*/
IngressFilter= 1<<28, /* discard packets from ingress port not in VLAN */
DiscardNonPVID= 1<<27, /* discard packets whose VID does not match port default VID */
ForcePortFC= 1<<26, /* force flow control */
EnablePortBP= 1<<25, /* enable back pressure */
/* 23:12 transmit high priority rate control */
/* 11:0 transmit low priority rate control */
/* cfg[n][2] */
/* 13:20 receive high priority rate control */
/* 19:8 receive low priority rate control */
Rdprc= 1<<7, /* receive differential priority rate control */
Lprrc= 1<<6, /* low priority receive rate control */
Hprrc= 1<<5, /* high priority receive rate control */
Lprfce= 1<<4, /* low priority receive flow control enable */
Hprfce= 1<<3, /* high priority ... */
Tdprc= 1<<2, /* transmit differential priority rate control */
Lptrc= 1<<1, /* low priority transmit rate control */
Hptrc= 1<<0, /* high priority transmit rate control */
/* seiac */
Cread= 1<<12,
Cwrite= 0<<12,
StaticMacs= 0<<10, /* static mac address table used */
VLANs= 1<<10, /* VLAN table */
DynMacs= 2<<10, /* dynamic address table */
MibCounter= 3<<10, /* MIB counter selected */
/* 0:9, table index */
/* seafc */
/* 26:22 1<<(n+22-1) = removal for port 0 to 4 */
};
/*
* indirect access to
* static MAC address table (3.10.23, p. 107)
* VLAN table (3.10.24, p. 108)
* dynamic MAC address table (3.10.25, p. 109)
* MIB counters (3.10.26, p. 110)
*/
enum {
/* VLAN table */
VlanValid= 1<<21, /* entry is valid */
/* 20:16 are bits for VLAN membership */
/* 15:12 are bits for FID (filter id) for up to 16 active VLANs */
/* 11:0 has 802.1Q 12 bit VLAN ID */
/* Dynamic MAC table (1024 entries) */
MACempty= 1<<(68-2*32),
/* 67:58 is number of valid entries-1 */
/* 57:56 ageing time stamp */
NotReady= 1<<(55-32),
/* 54:52 source port 0 to 5 */
/* 51:48 FID */
/* 47:0 MAC */
NVlans= 16,
NSMacs= 8,
};
/*
* per-port counters, table 3, 3.10.26, p. 110
* cleared when read
* port counters at n*0x20 [n=0-3]
*/
static char* portmibnames[] = {
"RxLoPriorityByte",
"RxHiPriorityByte",
"RxUndersizePkt",
"RxFragments",
"RxOversize",
"RxJabbers",
"RxSymbolError",
"RxCRCerror",
"RxAlignmentError",
"RxControl8808Pkts",
"RxPausePkts",
"RxBroadcast",
"RxMulticast",
"RxUnicast",
"Rx64Octets",
"Rx65to127Octets",
"Rx128to255Octets",
"Rx256to511Octets",
"Rx512to1023Octets",
"Rx1024to1522Octets",
"TxLoPriorityByte",
"TxHiPriorityByte",
"TxLateCollision",
"TxPausePkts",
"TxBroadcastPkts",
"TxMulticastPkts",
"TxUnicastPkts",
"TxDeferred",
"TxTotalCollision", /* like, totally */
"TxExcessiveCollision",
"TxSingleCollision",
"TxMultipleCollision",
};
enum {
/* per-port MIB counter format */
MibOverflow= 1<<31,
MibValid= 1<<30,
/* 29:0 counter value */
};
/*
* 16 bit `all port' counters, not automatically cleared
* offset 0x100 and up
*/
static char* allportnames[] = {
"Port1TxDropPackets",
"Port2TxDropPackets",
"Port3TxDropPackets",
"Port4TxDropPackets",
"LanTxDropPackets", /* ie, internal port 5 */
"Port1RxDropPackets",
"Port2RxDropPackets",
"Port3RxDropPackets",
"Port4RxDropPackets",
"LanRxDropPackets",
};
static void
switchinit(uchar *ea)
{
Switch *sw;
int i;
ulong an;
/* TO DO: LED gpio setting */
GPIOREG->iopm |= 0xF0; /* bits 4-7 are LAN(?) */
iprint("switch init...\n");
sw = KADDR(PHYSSWITCH);
if(sw->sec0 & Esf){
iprint("already inited\n");
return;
}
sw->seafc = 0;
microdelay(10);
sw->scph = 0;
microdelay(10);
sw->scpl = 0;
microdelay(10);
if(ea != nil){
sw->mah = (ea[0]<<8) | ea[1];
microdelay(10);
sw->mal = (ea[2]<<24) | (ea[3]<<16) | (ea[4]<<8) | ea[5];
microdelay(10);
}
for(i = 0; i < 5; i++){
sw->cfg[i][0] = (0x1F<<8) | STTxEn | STRxEn | Bsp; /* port is member of all vlans */
microdelay(10);
sw->cfg[i][1] = 0;
microdelay(10);
sw->cfg[i][2] = 0;
microdelay(10);
}
sw->ppm[0] = 0; /* perhaps soft reset? */
microdelay(10);
sw->ppm[1] = 0;
microdelay(10);
an = WAnr | WAnaP | WAna100FD | WAna100HD | WAna10FD | WAna10HD;
sw->an[0] = an | (an >> 16);
microdelay(10);
sw->an[1] = an | (an >> 16);
microdelay(10);
sw->sec1 = (0x4A<<21) | PhyEn;
microdelay(10);
sw->sec0 = Nbe | (0<<28) | (LedSpeed<<25) | (LedLinkTxRx<<22) | Sfce | Bsm | Age | Aboe | Bpm | Fair | Sbpe | Shdm | Esf;
microdelay(10);
/* off we go */
}
typedef struct Vidmap Vidmap;
struct Vidmap {
uchar ports; /* bit mask for ports 0 to 4 */
uchar fid; /* switch's filter id */
ushort vid; /* 802.1Q vlan id; 0=not valid */
};
static Vidmap
getvidmap(Switch *sw, int i)
{
ulong w;
Vidmap v;
v.ports = 0;
v.fid = 0;
v.vid = 0;
if(i < 0 || i >= NVlans)
return v;
sw->seiac = Cread | VLANs | i;
microdelay(10);
w = sw->seiadl;
if((w & VlanValid) == 0)
return v;
v.vid = w & 0xFFFF;
v.fid = (w>>12) & 0xF;
v.ports = (w>>16) & 0x1F;
return v;
}
static void
putvidmap(Switch *sw, int i, Vidmap v)
{
ulong w;
w = ((v.ports & 0x1F)<<16) | ((v.fid & 0xF)<<12) | (v.vid & 0xFFFF);
if(v.vid != 0)
w |= VlanValid;
sw->seiadl = w;
microdelay(10);
sw->seiac = Cwrite | VLANs | i;
microdelay(10);
}
typedef struct StaticMac StaticMac;
struct StaticMac {
uchar valid;
uchar fid;
uchar usefid;
uchar override; /* override spanning tree tx/rx disable */
uchar ports; /* forward to this set of ports */
uchar mac[Eaddrlen];
};
static StaticMac
getstaticmac(Switch *sw, int i)
{
StaticMac s;
ulong w;
memset(&s, 0, sizeof(s));
if(i < 0 || i >= NSMacs)
return s;
sw->seiac = Cread | StaticMacs | i;
microdelay(10);
w = sw->seiadh1;
if((w & (1<<(53-32))) == 0)
return s; /* entry not valid */
s.valid = 1;
s.fid= (w>>(57-32)) & 0xF;
s.usefid = (w & (1<<(56-32))) != 0;
s.override = (w & (1<<(54-32))) != 0;
s.ports = (w>>(48-32)) & 0x1F;
s.mac[5] = w >> 8;
s.mac[4] = w;
w = sw->seiadl;
s.mac[3] = w>>24;
s.mac[2] = w>>16;
s.mac[1] = w>>8;
s.mac[0] = w;
return s;
}
static void
putstaticmac(Switch *sw, int i, StaticMac s)
{
ulong w;
if(s.valid){
w = 1<<(53-32); /* entry valid */
if(s.usefid)
w |= 1<<(55-32);
if(s.override)
w |= 1<<(54-32);
w |= (s.fid & 0xF) << (56-32);
w |= (s.ports & 0x1F) << (48-32);
w |= (s.mac[5] << 8) | s.mac[4];
sw->seiadh1 = w;
microdelay(10);
w = (s.mac[3]<<24) | (s.mac[2]<<16) | (s.mac[1]<<8) | s.mac[0];
sw->seiadl = w;
microdelay(10);
}else{
sw->seiadh1 = 0; /* valid bit is 0; rest doesn't matter */
microdelay(10);
}
sw->seiac = Cwrite | StaticMacs | i;
microdelay(10);
}
typedef struct DynMac DynMac;
struct DynMac {
ushort nentry;
uchar valid;
uchar age;
uchar port; /* source port (0 origin) */
uchar fid; /* filter id */
uchar mac[Eaddrlen];
};
static DynMac
getdynmac(Switch *sw, int i)
{
DynMac d;
ulong w;
int n, l;
memset(&d, 0, sizeof d);
l = 0;
do{
if(++l > 100)
return d;
sw->seiac = Cread | DynMacs | i;
microdelay(10);
w = sw->seiadh2;
/* peculiar encoding of table size */
if(w & MACempty)
return d;
n = w & 0xF;
w = sw->seiadh1;
}while(w & NotReady); /* TO DO: how long might it delay? */
d.nentry = ((n<<6) | (w>>(58-32))) + 1;
if(i < 0 || i >= d.nentry)
return d;
d.valid = 1;
d.age = (w>>(56-32)) & 3;
d.port = (w>>(52-32)) & 7;
d.fid = (w>>(48-32)) & 0xF;
d.mac[5] = w>>8;
d.mac[4] = w;
w = sw->seiadl;
d.mac[3] = w>>24;
d.mac[2] = w>>16;
d.mac[1] = w>>8;
d.mac[0] = w;
return d;
}
static void
switchdump(void)
{
Switch *sw;
int i, j;
ulong w;
sw = KADDR(PHYSSWITCH);
iprint("sec0 %8.8lux\n", sw->sec0);
iprint("sec1 %8.8lux\n", sw->sec1);
for(i = 0; i < 5; i++){
iprint("cfg%d", i);
for(j = 0; j < 3; j++){
w = sw->cfg[i][j];
iprint(" %8.8lux", w);
}
iprint("\n");
if(i < 2){
w = sw->an[i];
iprint(" an=%8.8lux pm=%8.8lux\n", w, sw->ppm[i]);
}
}
for(i = 0; i < 8; i++){
sw->seiac = Cread | DynMacs | i;
microdelay(10);
w = sw->seiadh2;
microdelay(10);
iprint("dyn%d: %8.8lux", i, w);
w = sw->seiadh1;
microdelay(10);
iprint(" %8.8lux", w);
w = sw->seiadl;
microdelay(10);
iprint(" %8.8lux\n", w);
}
for(i=0; i<0x20; i++){
sw->seiac = Cread | MibCounter | i;
microdelay(10);
w = sw->seiadl;
microdelay(10);
if(w & (1<<30))
iprint("%.2ux: %s: %lud\n", i, portmibnames[i], w & ~(3<<30));
}
}
static void
switchstatproc(void*)
{
for(;;){
tsleep(&up->sleep, return0, nil, 30*1000);
}
}
void
etherks8695link(void)
{
addethercard("ks8695", reset);
}
/*
* notes:
* switch control
* read stats every 30 seconds or so
*/