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/*
* myricom 10g-pcie-8a 10 Gb ethernet driver
* © 2007 erik quanstrom, coraid
*
* the card is big endian.
* we use uvlong rather than uintptr to hold addresses so that
* we don't get "warning: stupid shift" on 32-bit architectures.
*
* appears to have massively-bloated buffers.
*/
#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 "../pc/etherif.h"
#ifndef KiB
#define KiB 1024u /* Kibi 0x0000000000000400 */
#define MiB 1048576u /* Mebi 0x0000000000100000 */
#endif /* KiB */
#define dprint(...) if(debug) print(__VA_ARGS__)
#define pcicapdbg(...)
#define malign(n) mallocalign((n), 4*KiB, 0, 0)
#include "etherm10g2k.i"
#include "etherm10g4k.i"
static int debug = 0;
static char Etimeout[] = "timeout";
enum {
Epromsz = 256,
Maxslots= 1024, /* rcv descriptors; wasteful: only 9 needed */
Align = 4096,
Maxmtu = 9000, /* jumbos; bad idea */
Noconf = 0xffffffff,
Fwoffset= 1*MiB,
Cmdoff = 0xf80000, /* command port offset */
Fwsubmt = 0xfc0000, /* firmware submission command port offset */
Rdmaoff = 0xfc01c0, /* rdma command port offset */
};
enum {
CZero,
Creset,
Cversion,
CSintrqdma, /* issue these before Cetherup */
CSbigsz, /* in bytes bigsize = 2^n */
CSsmallsz,
CGsendoff,
CGsmallrxoff,
CGbigrxoff,
CGirqackoff,
CGirqdeassoff,
CGsendrgsz,
CGrxrgsz,
CSintrqsz, /* 2^n */
Cetherup, /* above parameters + mtu/mac addr must be set first. */
Cetherdn,
CSmtu, /* below may be issued live */
CGcoaloff, /* in µs */
CSstatsrate, /* in µs */
CSstatsdma,
Cpromisc,
Cnopromisc,
CSmac,
Cenablefc,
Cdisablefc,
Cdmatest, /* address in d[0-1], d[2]=length */
Cenableallmc,
Cdisableallmc,
CSjoinmc,
CSleavemc,
Cleaveallmc,
CSstatsdma2, /* adds (unused) multicast stats */
};
typedef union {
uint i[2];
uchar c[8];
} Cmd;
typedef ulong Slot;
typedef struct {
ushort cksum;
ushort len;
} Slotparts;
enum {
SFsmall = 1,
SFfirst = 2,
SFalign = 4,
SFnotso = 16,
};
typedef struct {
ulong high;
ulong low;
ushort hdroff;
ushort len;
uchar pad;
uchar nrdma;
uchar chkoff;
uchar flags;
} Send;
typedef struct {
QLock;
Send *lanai; /* tx ring (cksum+len in lanai memory) */
Send *host; /* tx ring (data in our memory) */
Block **bring;
// uchar *wcfifo; /* what the heck is a w/c fifo? */
int size; /* of buffers in the z8's memory */
ulong segsz;
uint n; /* rxslots */
uint m; /* mask; rxslots must be a power of two */
uint i; /* number of segments (not frames) queued */
uint cnt; /* number of segments sent by the card */
ulong npkt;
vlong nbytes;
} Tx;
typedef struct {
Lock;
Block *head;
uint size; /* buffer size of each block */
uint n; /* n free buffers */
uint cnt;
} Bpool;
static Bpool smpool = { .size = 128, };
static Bpool bgpool = { .size = Maxmtu, };
typedef struct {
Bpool *pool; /* free buffers */
ulong *lanai; /* rx ring; we have no permanent host shadow */
Block **host; /* called "info" in myricom driver */
// uchar *wcfifo; /* cmd submission fifo */
uint m;
uint n; /* rxslots */
uint i;
uint cnt; /* number of buffers allocated (lifetime) */
uint allocfail;
} Rx;
/* dma mapped. unix network byte order. */
typedef struct {
uchar txcnt[4];
uchar linkstat[4];
uchar dlink[4];
uchar derror[4];
uchar drunt[4];
uchar doverrun[4];
uchar dnosm[4];
uchar dnobg[4];
uchar nrdma[4];
uchar txstopped;
uchar down;
uchar updated;
uchar valid;
} Stats;
enum {
Detached,
Attached,
Runed,
};
typedef struct {
Slot *entry;
uvlong busaddr;
uint m;
uint n;
uint i;
} Done;
typedef struct Ctlr Ctlr;
typedef struct Ctlr {
QLock;
int state;
int kprocs;
uvlong port;
Pcidev* pcidev;
Ctlr* next;
int active;
int id; /* do we need this? */
uchar ra[Eaddrlen];
int ramsz;
uchar *ram;
ulong *irqack;
ulong *irqdeass;
ulong *coal;
char eprom[Epromsz];
ulong serial; /* unit serial number */
QLock cmdl;
Cmd *cmd; /* address of command return */
uvlong cprt; /* bus address of command */
uvlong boot; /* boot address */
Done done;
Tx tx;
Rx sm;
Rx bg;
Stats *stats;
uvlong statsprt;
Rendez rxrendez;
Rendez txrendez;
int msi;
ulong linkstat;
ulong nrdma;
} Ctlr;
static Ctlr *ctlrs;
enum {
PciCapPMG = 0x01, /* power management */
PciCapAGP = 0x02,
PciCapVPD = 0x03, /* vital product data */
PciCapSID = 0x04, /* slot id */
PciCapMSI = 0x05,
PciCapCHS = 0x06, /* compact pci hot swap */
PciCapPCIX = 0x07,
PciCapHTC = 0x08, /* hypertransport irq conf */
PciCapVND = 0x09, /* vendor specific information */
PciCapHSW = 0x0C, /* hot swap */
PciCapPCIe = 0x10,
PciCapMSIX = 0x11,
};
enum {
PcieAERC = 1,
PcieVC,
PcieSNC,
PciePBC,
};
enum {
AercCCR = 0x18, /* control register */
};
enum {
PcieCTL = 8,
PcieLCR = 12,
PcieMRD = 0x7000, /* maximum read size */
};
static int
pcicap(Pcidev *p, int cap)
{
int i, c, off;
pcicapdbg("pcicap: %x:%d\n", p->vid, p->did);
off = 0x34; /* 0x14 for cardbus */
for(i = 48; i--; ){
pcicapdbg("\t" "loop %x\n", off);
off = pcicfgr8(p, off);
pcicapdbg("\t" "pcicfgr8 %x\n", off);
if(off < 0x40)
break;
off &= ~3;
c = pcicfgr8(p, off);
pcicapdbg("\t" "pcicfgr8 %x\n", c);
if(c == 0xff)
break;
if(c == cap)
return off;
off++;
}
return 0;
}
/*
* this function doesn't work because pcicgr32 doesn't have access
* to the pcie extended configuration space.
*/
static int
pciecap(Pcidev *p, int cap)
{
uint off, i;
off = 0x100;
while(((i = pcicfgr32(p, off)) & 0xffff) != cap){
off = i >> 20;
print("m10g: pciecap offset = %ud", off);
if(off < 0x100 || off >= 4*KiB - 1)
return 0;
}
print("m10g: pciecap found = %ud", off);
return off;
}
static int
setpcie(Pcidev *p)
{
int off;
/* set 4k writes */
off = pcicap(p, PciCapPCIe);
if(off < 64)
return -1;
off += PcieCTL;
pcicfgw16(p, off, (pcicfgr16(p, off) & ~PcieMRD) | 5<<12);
return 0;
}
static int
whichfw(Pcidev *p)
{
char *s;
int i, off, lanes, ecrc;
ulong cap;
/* check the number of configured lanes. */
off = pcicap(p, PciCapPCIe);
if(off < 64)
return -1;
off += PcieLCR;
cap = pcicfgr16(p, off);
lanes = (cap>>4) & 0x3f;
/* check AERC register. we need it on. */
off = pciecap(p, PcieAERC);
print("; offset %d returned\n", off);
cap = 0;
if(off != 0){
off += AercCCR;
cap = pcicfgr32(p, off);
print("m10g: %lud cap\n", cap);
}
ecrc = (cap>>4) & 0xf;
/* if we don't like the aerc, kick it here. */
print("m10g: %d lanes; ecrc=%d; ", lanes, ecrc);
if(s = getconf("myriforce")){
i = atoi(s);
if(i != 4*KiB || i != 2*KiB)
i = 2*KiB;
print("fw = %d [forced]\n", i);
return i;
}
if(lanes <= 4)
print("fw = 4096 [lanes]\n");
else if(ecrc & 10)
print("fw = 4096 [ecrc set]\n");
else
print("fw = 4096 [default]\n");
return 4*KiB;
}
static int
parseeprom(Ctlr *c)
{
int i, j, k, l, bits;
char *s;
dprint("m10g eprom:\n");
s = c->eprom;
bits = 3;
for(i = 0; s[i] && i < Epromsz; i++){
l = strlen(s+i);
dprint("\t%s\n", s+i);
if(strncmp(s+i, "MAC=", 4) == 0 && l == 4+12+5){
bits ^= 1;
j = i + 4;
for(k = 0; k < 6; k++)
c->ra[k] = strtoul(s+j+3*k, 0, 16);
}else if(strncmp(s+i, "SN=", 3) == 0){
bits ^= 2;
c->serial = atoi(s+i+3);
}
i += l;
}
if(bits)
return -1;
return 0;
}
static ushort
pbit16(ushort i)
{
ushort j;
uchar *p;
p = (uchar*)&j;
p[1] = i;
p[0] = i>>8;
return j;
}
static ushort
gbit16(uchar i[2])
{
ushort j;
j = i[1];
j |= i[0]<<8;
return j;
}
static ulong
pbit32(ulong i)
{
ulong j;
uchar *p;
p = (uchar*)&j;
p[3] = i;
p[2] = i>>8;
p[1] = i>>16;
p[0] = i>>24;
return j;
}
static ulong
gbit32(uchar i[4])
{
ulong j;
j = i[3];
j |= i[2]<<8;
j |= i[1]<<16;
j |= i[0]<<24;
return j;
}
static void
prepcmd(ulong *cmd, int i)
{
while(i-- > 0)
cmd[i] = pbit32(cmd[i]);
}
/*
* the command looks like this (int 32bit integers)
* cmd type
* addr (low)
* addr (high)
* pad (used for dma testing)
* response (high)
* response (low)
* 40 byte = 5 int pad.
*/
ulong
cmd(Ctlr *c, int type, uvlong data)
{
ulong buf[16], i;
Cmd *cmd;
qlock(&c->cmdl);
cmd = c->cmd;
cmd->i[1] = Noconf;
memset(buf, 0, sizeof buf);
buf[0] = type;
buf[1] = data;
buf[2] = data >> 32;
buf[4] = c->cprt >> 32;
buf[5] = c->cprt;
prepcmd(buf, 6);
coherence();
memmove(c->ram + Cmdoff, buf, sizeof buf);
if(waserror()){
qunlock(&c->cmdl);
nexterror();
}
for(i = 0; i < 15; i++){
if(cmd->i[1] != Noconf){
poperror();
i = gbit32(cmd->c);
qunlock(&c->cmdl);
if(cmd->i[1] != 0)
dprint("[%lux]", i);
return i; /* normal return */
}
tsleep(&up->sleep, return0, 0, 1);
}
iprint("m10g: cmd timeout [%ux %ux] cmd=%d\n",
cmd->i[0], cmd->i[1], type);
error(Etimeout);
return ~0; /* silence! */
}
ulong
maccmd(Ctlr *c, int type, uchar *m)
{
ulong buf[16], i;
Cmd *cmd;
qlock(&c->cmdl);
cmd = c->cmd;
cmd->i[1] = Noconf;
memset(buf, 0, sizeof buf);
buf[0] = type;
buf[1] = m[0]<<24 | m[1]<<16 | m[2]<<8 | m[3];
buf[2] = m[4]<< 8 | m[5];
buf[4] = c->cprt >> 32;
buf[5] = c->cprt;
prepcmd(buf, 6);
coherence();
memmove(c->ram + Cmdoff, buf, sizeof buf);
if(waserror()){
qunlock(&c->cmdl);
nexterror();
}
for(i = 0; i < 15; i++){
if(cmd->i[1] != Noconf){
poperror();
i = gbit32(cmd->c);
qunlock(&c->cmdl);
if(cmd->i[1] != 0)
dprint("[%lux]", i);
return i; /* normal return */
}
tsleep(&up->sleep, return0, 0, 1);
}
iprint("m10g: maccmd timeout [%ux %ux] cmd=%d\n",
cmd->i[0], cmd->i[1], type);
error(Etimeout);
return ~0; /* silence! */
}
/* remove this garbage after testing */
enum {
DMAread = 0x10000,
DMAwrite= 0x1,
};
ulong
dmatestcmd(Ctlr *c, int type, uvlong addr, int len)
{
ulong buf[16], i;
memset(buf, 0, sizeof buf);
memset(c->cmd, Noconf, sizeof *c->cmd);
buf[0] = Cdmatest;
buf[1] = addr;
buf[2] = addr >> 32;
buf[3] = len * type;
buf[4] = c->cprt >> 32;
buf[5] = c->cprt;
prepcmd(buf, 6);
coherence();
memmove(c->ram + Cmdoff, buf, sizeof buf);
for(i = 0; i < 15; i++){
if(c->cmd->i[1] != Noconf){
i = gbit32(c->cmd->c);
if(i == 0)
error(Eio);
return i; /* normal return */
}
tsleep(&up->sleep, return0, 0, 5);
}
error(Etimeout);
return ~0; /* silence! */
}
ulong
rdmacmd(Ctlr *c, int on)
{
ulong buf[16], i;
memset(buf, 0, sizeof buf);
c->cmd->i[0] = 0;
coherence();
buf[0] = c->cprt >> 32;
buf[1] = c->cprt;
buf[2] = Noconf;
buf[3] = c->cprt >> 32;
buf[4] = c->cprt;
buf[5] = on;
prepcmd(buf, 6);
memmove(c->ram + Rdmaoff, buf, sizeof buf);
for(i = 0; i < 20; i++){
if(c->cmd->i[0] == Noconf)
return gbit32(c->cmd->c); /* normal return */
tsleep(&up->sleep, return0, 0, 1);
}
iprint("m10g: rdmacmd timeout\n");
error(Etimeout);
return ~0; /* silence! */
}
static int
loadfw(Ctlr *c, int *align)
{
ulong *f, *s, sz;
int i;
if((*align = whichfw(c->pcidev)) == 4*KiB){
f = (ulong*)fw4k;
sz = sizeof fw4k;
}else{
f = (ulong*)fw2k;
sz = sizeof fw2k;
}
s = (ulong*)(c->ram + Fwoffset);
for(i = 0; i < sz / 4; i++)
s[i] = f[i];
return sz & ~3;
}
static int
bootfw(Ctlr *c)
{
int i, sz, align;
ulong buf[16];
Cmd* cmd;
if((sz = loadfw(c, &align)) == 0)
return 0;
dprint("bootfw %d bytes ... ", sz);
cmd = c->cmd;
memset(buf, 0, sizeof buf);
c->cmd->i[0] = 0;
coherence();
buf[0] = c->cprt >> 32; /* upper dma target address */
buf[1] = c->cprt; /* lower */
buf[2] = Noconf; /* writeback */
buf[3] = Fwoffset + 8,
buf[4] = sz - 8;
buf[5] = 8;
buf[6] = 0;
prepcmd(buf, 7);
coherence();
memmove(c->ram + Fwsubmt, buf, sizeof buf);
for(i = 0; i < 20; i++){
if(cmd->i[0] == Noconf)
break;
delay(1);
}
dprint("[%lux %lux]", gbit32(cmd->c), gbit32(cmd->c+4));
if(i == 20){
print("m10g: cannot load fw\n");
return -1;
}
dprint("\n");
c->tx.segsz = align;
return 0;
}
static int
kickthebaby(Pcidev *p, Ctlr *c)
{
/* don't kick the baby! */
ulong code;
pcicfgw8(p, 0x10 + c->boot, 0x3);
pcicfgw32(p, 0x18 + c->boot, 0xfffffff0);
code = pcicfgr32(p, 0x14 + c->boot);
dprint("reboot status = %lux\n", code);
if(code != 0xfffffff0)
return -1;
return 0;
}
typedef struct {
uchar len[4];
uchar type[4];
char version[128];
uchar globals[4];
uchar ramsz[4];
uchar specs[4];
uchar specssz[4];
} Fwhdr;
enum {
Tmx = 0x4d582020,
Tpcie = 0x70636965,
Teth = 0x45544820,
Tmcp0 = 0x4d435030,
};
static char *
fwtype(ulong type)
{
switch(type){
case Tmx:
return "mx";
case Tpcie:
return "PCIe";
case Teth:
return "eth";
case Tmcp0:
return "mcp0";
}
return "*GOK*";
}
static int
chkfw(Ctlr *c)
{
ulong off, type;
Fwhdr *h;
off = gbit32(c->ram+0x3c);
dprint("firmware %lux\n", off);
if((off&3) || off + sizeof *h > c->ramsz){
print("!m10g: bad firmware %lux\n", off);
return -1;
}
h = (Fwhdr*)(c->ram + off);
type = gbit32(h->type);
dprint("\t" "type %s\n", fwtype(type));
dprint("\t" "vers %s\n", h->version);
dprint("\t" "ramsz %lux\n", gbit32(h->ramsz));
if(type != Teth){
print("!m10g: bad card type %s\n", fwtype(type));
return -1;
}
return bootfw(c) || rdmacmd(c, 0);
}
static int
reset(Ether *e, Ctlr *c)
{
ulong i, sz;
if(waserror()){
print("m10g: reset error\n");
nexterror();
return -1;
}
chkfw(c);
cmd(c, Creset, 0);
cmd(c, CSintrqsz, c->done.n * sizeof *c->done.entry);
cmd(c, CSintrqdma, c->done.busaddr);
c->irqack = (ulong*)(c->ram + cmd(c, CGirqackoff, 0));
/* required only if we're not doing msi? */
c->irqdeass = (ulong*)(c->ram + cmd(c, CGirqdeassoff, 0));
/* this is the driver default, why fiddle with this? */
c->coal = (ulong*)(c->ram + cmd(c, CGcoaloff, 0));
*c->coal = pbit32(25);
dprint("dma stats:\n");
rdmacmd(c, 1);
sz = c->tx.segsz;
i = dmatestcmd(c, DMAread, c->done.busaddr, sz);
print("m10g: read %lud MB/s;", ((i>>16)*sz*2) / (i&0xffff));
i = dmatestcmd(c, DMAwrite, c->done.busaddr, sz);
print(" write %lud MB/s;", ((i>>16)*sz*2) / (i&0xffff));
i = dmatestcmd(c, DMAwrite|DMAread, c->done.busaddr, sz);
print(" r/w %lud MB/s\n", ((i>>16)*sz*2*2) / (i&0xffff));
memset(c->done.entry, 0, c->done.n * sizeof *c->done.entry);
maccmd(c, CSmac, c->ra);
// cmd(c, Cnopromisc, 0);
cmd(c, Cenablefc, 0);
e->maxmtu = Maxmtu;
cmd(c, CSmtu, e->maxmtu);
dprint("CSmtu %d...\n", e->maxmtu);
poperror();
return 0;
}
static void
ctlrfree(Ctlr *c)
{
/* free up all the Block*s, too */
free(c->tx.host);
free(c->sm.host);
free(c->bg.host);
free(c->cmd);
free(c->done.entry);
free(c->stats);
free(c);
}
static int
setmem(Pcidev *p, Ctlr *c)
{
ulong i;
uvlong raddr;
Done *d;
void *mem;
c->tx.segsz = 2048;
c->ramsz = 2*MiB - (2*48*KiB + 32*KiB) - 0x100;
if(c->ramsz > p->mem[0].size)
return -1;
raddr = p->mem[0].bar & ~0x0F;
mem = vmap(raddr, p->mem[0].size);
if(mem == nil){
print("m10g: can't map %8.8lux\n", p->mem[0].bar);
return -1;
}
dprint("%llux <- vmap(mem[0].size = %ux)\n", raddr, p->mem[0].size);
c->port = raddr;
c->ram = mem;
c->cmd = malign(sizeof *c->cmd);
c->cprt = PCIWADDR(c->cmd);
d = &c->done;
d->n = Maxslots;
d->m = d->n - 1;
i = d->n * sizeof *d->entry;
d->entry = malign(i);
memset(d->entry, 0, i);
d->busaddr = PCIWADDR(d->entry);
c->stats = malign(sizeof *c->stats);
memset(c->stats, 0, sizeof *c->stats);
c->statsprt = PCIWADDR(c->stats);
memmove(c->eprom, c->ram + c->ramsz - Epromsz, Epromsz-2);
return setpcie(p) || parseeprom(c);
}
static Rx*
whichrx(Ctlr *c, int sz)
{
if(sz <= smpool.size)
return &c->sm;
return &c->bg;
}
static Block*
balloc(Rx* rx)
{
Block *bp;
ilock(rx->pool);
if((bp = rx->pool->head) != nil){
rx->pool->head = bp->next;
bp->next = nil;
_xinc(&bp->ref); /* prevent bp from being freed */
rx->pool->n--;
}
iunlock(rx->pool);
return bp;
}
static void
rbfree(Block *b, Bpool *p)
{
b->rp = b->wp = (uchar*)PGROUND((uintptr)b->base);
b->flag &= ~(Bipck | Budpck | Btcpck | Bpktck);
ilock(p);
b->next = p->head;
p->head = b;
p->n++;
p->cnt++;
iunlock(p);
}
static void
smbfree(Block *b)
{
rbfree(b, &smpool);
}
static void
bgbfree(Block *b)
{
rbfree(b, &bgpool);
}
static void
replenish(Rx *rx)
{
ulong buf[16], i, idx, e;
Bpool *p;
Block *b;
p = rx->pool;
if(p->n < 8)
return;
memset(buf, 0, sizeof buf);
e = (rx->i - rx->cnt) & ~7;
e += rx->n;
while(p->n >= 8 && e){
idx = rx->cnt & rx->m;
for(i = 0; i < 8; i++){
b = balloc(rx);
buf[i*2] = pbit32((uvlong)PCIWADDR(b->wp) >> 32);
buf[i*2+1] = pbit32(PCIWADDR(b->wp));
rx->host[idx+i] = b;
assert(b);
}
memmove(rx->lanai + 2*idx, buf, sizeof buf);
coherence();
rx->cnt += 8;
e -= 8;
}
if(e && p->n > 7+1)
print("m10g: should panic? pool->n = %d\n", p->n);
}
/*
* future:
* if (c->mtrr >= 0) {
* c->tx.wcfifo = c->ram+0x200000;
* c->sm.wcfifo = c->ram+0x300000;
* c->bg.wcfifo = c->ram+0x340000;
* }
*/
static int
nextpow(int j)
{
int i;
for(i = 0; j > (1 << i); i++)
;
return 1 << i;
}
static void*
emalign(int sz)
{
void *v;
v = malign(sz);
if(v == nil)
error(Enomem);
memset(v, 0, sz);
return v;
}
static void
open0(Ether *e, Ctlr *c)
{
Block *b;
int i, sz, entries;
entries = cmd(c, CGsendrgsz, 0) / sizeof *c->tx.lanai;
c->tx.lanai = (Send*)(c->ram + cmd(c, CGsendoff, 0));
c->tx.host = emalign(entries * sizeof *c->tx.host);
c->tx.bring = emalign(entries * sizeof *c->tx.bring);
c->tx.n = entries;
c->tx.m = entries-1;
entries = cmd(c, CGrxrgsz, 0)/8;
c->sm.pool = &smpool;
cmd(c, CSsmallsz, c->sm.pool->size);
c->sm.lanai = (ulong*)(c->ram + cmd(c, CGsmallrxoff, 0));
c->sm.n = entries;
c->sm.m = entries-1;
c->sm.host = emalign(entries * sizeof *c->sm.host);
c->bg.pool = &bgpool;
c->bg.pool->size = nextpow(2 + e->maxmtu); /* 2-byte alignment pad */
cmd(c, CSbigsz, c->bg.pool->size);
c->bg.lanai = (ulong*)(c->ram + cmd(c, CGbigrxoff, 0));
c->bg.n = entries;
c->bg.m = entries-1;
c->bg.host = emalign(entries * sizeof *c->bg.host);
sz = c->sm.pool->size + BY2PG;
for(i = 0; i < c->sm.n; i++){
if((b = allocb(sz)) == 0)
break;
b->free = smbfree;
freeb(b);
}
sz = c->bg.pool->size + BY2PG;
for(i = 0; i < c->bg.n; i++){
if((b = allocb(sz)) == 0)
break;
b->free = bgbfree;
freeb(b);
}
cmd(c, CSstatsdma, c->statsprt);
c->linkstat = ~0;
c->nrdma = 15;
cmd(c, Cetherup, 0);
}
static Block*
nextblock(Ctlr *c)
{
uint i;
ushort l, k;
Block *b;
Done *d;
Rx *rx;
Slot *s;
Slotparts *sp;
d = &c->done;
s = d->entry;
i = d->i & d->m;
sp = (Slotparts *)(s + i);
l = sp->len;
if(l == 0)
return 0;
k = sp->cksum;
s[i] = 0;
d->i++;
l = gbit16((uchar*)&l);
//dprint("nextb: i=%d l=%d\n", d->i, l);
rx = whichrx(c, l);
if(rx->i >= rx->cnt){
iprint("m10g: overrun\n");
return 0;
}
i = rx->i & rx->m;
b = rx->host[i];
rx->host[i] = 0;
if(b == 0){
iprint("m10g: error rx to no block. memory is hosed.\n");
return 0;
}
rx->i++;
b->flag |= Bipck|Btcpck|Budpck;
b->checksum = k;
b->rp += 2;
b->wp += 2+l;
b->lim = b->wp; /* lie like a dog. */
return b;
}
static int
rxcansleep(void *v)
{
Ctlr *c;
Slot *s;
Slotparts *sp;
Done *d;
c = v;
d = &c->done;
s = c->done.entry;
sp = (Slotparts *)(s + (d->i & d->m));
if(sp->len != 0)
return -1;
c->irqack[0] = pbit32(3);
return 0;
}
static void
m10rx(void *v)
{
Ether *e;
Ctlr *c;
Block *b;
e = v;
c = e->ctlr;
for(;;){
replenish(&c->sm);
replenish(&c->bg);
sleep(&c->rxrendez, rxcansleep, c);
while(b = nextblock(c))
etheriq(e, b, 1);
}
}
static void
txcleanup(Tx *tx, ulong n)
{
Block *b;
uint j, l, m;
if(tx->npkt == n)
return;
l = 0;
m = tx->m;
/*
* if tx->cnt == tx->i, yet tx->npkt == n-1, we just
* caught ourselves and myricom card updating.
*/
for(;; tx->cnt++){
j = tx->cnt & tx->m;
if(b = tx->bring[j]){
tx->bring[j] = 0;
tx->nbytes += BLEN(b);
freeb(b);
if(++tx->npkt == n)
return;
}
if(tx->cnt == tx->i)
return;
if(l++ == m){
iprint("m10g: tx ovrun: %lud %lud\n", n, tx->npkt);
return;
}
}
}
static int
txcansleep(void *v)
{
Ctlr *c;
c = v;
if(c->tx.cnt != c->tx.i && c->tx.npkt != gbit32(c->stats->txcnt))
return -1;
return 0;
}
static void
txproc(void *v)
{
Ether *e;
Ctlr *c;
Tx *tx;
e = v;
c = e->ctlr;
tx = &c->tx;
for(;;){
sleep(&c->txrendez, txcansleep, c);
txcleanup(tx, gbit32(c->stats->txcnt));
}
}
static void
submittx(Tx *tx, int n)
{
Send *l, *h;
int i0, i, m;
m = tx->m;
i0 = tx->i & m;
l = tx->lanai;
h = tx->host;
for(i = n-1; i >= 0; i--)
memmove(l+(i + i0 & m), h+(i + i0 & m), sizeof *h);
tx->i += n;
// coherence();
}
static int
nsegments(Block *b, int segsz)
{
uintptr bus, end, slen, len;
int i;
bus = PCIWADDR(b->rp);
i = 0;
for(len = BLEN(b); len; len -= slen){
end = bus + segsz & ~(segsz-1);
slen = end - bus;
if(slen > len)
slen = len;
bus += slen;
i++;
}
return i;
}
static void
m10gtransmit(Ether *e)
{
ushort slen;
ulong i, cnt, rdma, nseg, count, end, bus, len, segsz;
uchar flags;
Block *b;
Ctlr *c;
Send *s, *s0, *s0m8;
Tx *tx;
c = e->ctlr;
tx = &c->tx;
segsz = tx->segsz;
qlock(tx);
count = 0;
s = tx->host + (tx->i & tx->m);
cnt = tx->cnt;
s0 = tx->host + (cnt & tx->m);
s0m8 = tx->host + ((cnt - 8) & tx->m);
i = tx->i;
for(; s >= s0 || s < s0m8; i += nseg){
if((b = qget(e->oq)) == nil)
break;
flags = SFfirst|SFnotso;
if((len = BLEN(b)) < 1520)
flags |= SFsmall;
rdma = nseg = nsegments(b, segsz);
bus = PCIWADDR(b->rp);
for(; len; len -= slen){
end = (bus + segsz) & ~(segsz-1);
slen = end - bus;
if(slen > len)
slen = len;
s->low = pbit32(bus);
s->len = pbit16(slen);
s->nrdma = rdma;
s->flags = flags;
bus += slen;
if(++s == tx->host + tx->n)
s = tx->host;
count++;
flags &= ~SFfirst;
rdma = 1;
}
tx->bring[(i + nseg - 1) & tx->m] = b;
if(1 || count > 0){
submittx(tx, count);
count = 0;
cnt = tx->cnt;
s0 = tx->host + (cnt & tx->m);
s0m8 = tx->host + ((cnt - 8) & tx->m);
}
}
qunlock(tx);
}
static void
checkstats(Ether *e, Ctlr *c, Stats *s)
{
ulong i;
if(s->updated == 0)
return;
i = gbit32(s->linkstat);
if(c->linkstat != i){
e->link = i;
if(c->linkstat = i)
dprint("m10g: link up\n");
else
dprint("m10g: link down\n");
}
i = gbit32(s->nrdma);
if(i != c->nrdma){
dprint("m10g: rdma timeout %ld\n", i);
c->nrdma = i;
}
}
static void
waitintx(Ctlr *c)
{
int i;
for(i = 0; i < 1024*1024; i++){
if(c->stats->valid == 0)
break;
coherence();
}
}
static void
m10ginterrupt(Ureg *, void *v)
{
Ether *e;
Ctlr *c;
e = v;
c = e->ctlr;
if(c->state != Runed || c->stats->valid == 0) /* not ready for us? */
return;
if(c->stats->valid & 1)
wakeup(&c->rxrendez);
if(gbit32(c->stats->txcnt) != c->tx.npkt)
wakeup(&c->txrendez);
if(c->msi == 0)
*c->irqdeass = 0;
else
c->stats->valid = 0;
waitintx(c);
checkstats(e, c, c->stats);
c->irqack[1] = pbit32(3);
}
static void
m10gattach(Ether *e)
{
Ctlr *c;
char name[12];
dprint("m10gattach\n");
qlock(e->ctlr);
c = e->ctlr;
if(c->state != Detached){
qunlock(c);
return;
}
if(waserror()){
c->state = Detached;
qunlock(c);
nexterror();
}
reset(e, c);
c->state = Attached;
open0(e, c);
if(c->kprocs == 0){
c->kprocs++;
snprint(name, sizeof name, "#l%drxproc", e->ctlrno);
kproc(name, m10rx, e);
snprint(name, sizeof name, "#l%dtxproc", e->ctlrno);
kproc(name, txproc, e);
}
c->state = Runed;
qunlock(c);
poperror();
}
static int
m10gdetach(Ctlr *c)
{
dprint("m10gdetach\n");
// reset(e->ctlr);
vunmap(c->ram, c->pcidev->mem[0].size);
ctlrfree(c); /* this is a bad idea: don't free c */
return -1;
}
static int
lstcount(Block *b)
{
int i;
i = 0;
for(; b; b = b->next)
i++;
return i;
}
static long
m10gifstat(Ether *e, void *v, long n, ulong off)
{
char *p;
Ctlr *c;
Stats s;
c = e->ctlr;
p = malloc(READSTR+1);
if(p == nil)
error(Enomem);
/* no point in locking this because this is done via dma. */
memmove(&s, c->stats, sizeof s);
snprint(p, READSTR,
"txcnt = %lud\n" "linkstat = %lud\n" "dlink = %lud\n"
"derror = %lud\n" "drunt = %lud\n" "doverrun = %lud\n"
"dnosm = %lud\n" "dnobg = %lud\n" "nrdma = %lud\n"
"txstopped = %ud\n" "down = %ud\n" "updated = %ud\n"
"valid = %ud\n\n"
"tx pkt = %lud\n" "tx bytes = %lld\n"
"tx cnt = %ud\n" "tx n = %ud\n" "tx i = %ud\n"
"sm cnt = %ud\n" "sm i = %ud\n" "sm n = %ud\n"
"sm lst = %ud\n"
"bg cnt = %ud\n" "bg i = %ud\n" "bg n = %ud\n"
"bg lst = %ud\n"
"segsz = %lud\n" "coal = %lud\n",
gbit32(s.txcnt), gbit32(s.linkstat), gbit32(s.dlink),
gbit32(s.derror), gbit32(s.drunt), gbit32(s.doverrun),
gbit32(s.dnosm), gbit32(s.dnobg), gbit32(s.nrdma),
s.txstopped, s.down, s.updated, s.valid,
c->tx.npkt, c->tx.nbytes,
c->tx.cnt, c->tx.n, c->tx.i,
c->sm.cnt, c->sm.i, c->sm.pool->n, lstcount(c->sm.pool->head),
c->bg.cnt, c->bg.i, c->bg.pool->n, lstcount(c->bg.pool->head),
c->tx.segsz, gbit32((uchar*)c->coal));
n = readstr(off, v, n, p);
free(p);
return n;
}
//static void
//summary(Ether *e)
//{
// char *buf;
// int n, i, j;
//
// if(e == 0)
// return;
// buf = malloc(n=250);
// if(buf == 0)
// return;
//
// snprint(buf, n, "oq\n");
// qsummary(e->oq, buf+3, n-3-1);
// iprint("%s", buf);
//
// if(e->f) for(i = 0; e->f[i]; i++){
// j = snprint(buf, n, "f%d %d\n", i, e->f[i]->type);
// qsummary(e->f[i]->in, buf+j, n-j-1);
// print("%s", buf);
// }
//
// free(buf);
//}
static void
rxring(Ctlr *c)
{
Done *d;
Slot *s;
Slotparts *sp;
int i;
d = &c->done;
s = d->entry;
for(i = 0; i < d->n; i++) {
sp = (Slotparts *)(s + i);
if(sp->len)
iprint("s[%d] = %d\n", i, sp->len);
}
}
enum {
CMdebug,
CMcoal,
CMwakeup,
CMtxwakeup,
CMqsummary,
CMrxring,
};
static Cmdtab ctab[] = {
CMdebug, "debug", 2,
CMcoal, "coal", 2,
CMwakeup, "wakeup", 1,
CMtxwakeup, "txwakeup", 1,
// CMqsummary, "q", 1,
CMrxring, "rxring", 1,
};
static long
m10gctl(Ether *e, void *v, long n)
{
int i;
Cmdbuf *c;
Cmdtab *t;
dprint("m10gctl\n");
if(e->ctlr == nil)
error(Enonexist);
c = parsecmd(v, n);
if(waserror()){
free(c);
nexterror();
}
t = lookupcmd(c, ctab, nelem(ctab));
switch(t->index){
case CMdebug:
debug = (strcmp(c->f[1], "on") == 0);
break;
case CMcoal:
i = atoi(c->f[1]);
if(i < 0 || i > 1000)
error(Ebadarg);
*((Ctlr*)e->ctlr)->coal = pbit32(i);
break;
case CMwakeup:
wakeup(&((Ctlr*)e->ctlr)->rxrendez); /* you're kidding, right? */
break;
case CMtxwakeup:
wakeup(&((Ctlr*)e->ctlr)->txrendez); /* you're kidding, right? */
break;
// case CMqsummary:
// summary(e);
// break;
case CMrxring:
rxring(e->ctlr);
break;
default:
error(Ebadarg);
}
free(c);
poperror();
return n;
}
static void
m10gshutdown(Ether *e)
{
dprint("m10gshutdown\n");
m10gdetach(e->ctlr);
}
static void
m10gpromiscuous(void *v, int on)
{
Ether *e;
int i;
dprint("m10gpromiscuous\n");
e = v;
if(on)
i = Cpromisc;
else
i = Cnopromisc;
cmd(e->ctlr, i, 0);
}
static int mcctab[] = { CSleavemc, CSjoinmc };
static char *mcntab[] = { "leave", "join" };
static void
m10gmulticast(void *v, uchar *ea, int on)
{
Ether *e;
int i;
dprint("m10gmulticast\n");
e = v;
if((i = maccmd(e->ctlr, mcctab[on], ea)) != 0)
print("m10g: can't %s %E: %d\n", mcntab[on], ea, i);
}
static void
m10gpci(void)
{
Pcidev *p;
Ctlr *t, *c;
t = 0;
for(p = 0; p = pcimatch(p, Vmyricom, 0); ){
switch(p->did){
case 0x8: /* 8a */
break;
case 0x9: /* 8a with msi-x fw */
case 0xa: /* 8b */
case 0xb: /* 8b2 */
case 0xc: /* 2-8b2 */
/* untested */
break;
default:
print("etherm10g: unknown myricom did %#ux\n", p->did);
continue;
}
c = malloc(sizeof *c);
if(c == nil)
break;
c->pcidev = p;
c->id = p->did<<16 | p->vid;
c->boot = pcicap(p, PciCapVND);
// kickthebaby(p, c);
pcisetbme(p);
if(setmem(p, c) == -1){
print("m10g: setmem failed\n");
free(c);
/* cleanup */
continue;
}
if(t)
t->next = c;
else
ctlrs = c;
t = c;
}
}
static int
m10gpnp(Ether *e)
{
Ctlr *c;
if(ctlrs == nil)
m10gpci();
for(c = ctlrs; c != nil; c = c->next)
if(c->active)
continue;
else if(e->port == 0 || e->port == c->port)
break;
if(c == nil)
return -1;
c->active = 1;
e->ctlr = c;
e->port = c->port;
e->irq = c->pcidev->intl;
e->tbdf = c->pcidev->tbdf;
e->mbps = 10000;
memmove(e->ea, c->ra, Eaddrlen);
e->attach = m10gattach;
e->detach = m10gshutdown;
e->transmit = m10gtransmit;
e->interrupt = m10ginterrupt;
e->ifstat = m10gifstat;
e->ctl = m10gctl;
e->shutdown = m10gshutdown;
e->arg = e;
e->promiscuous = m10gpromiscuous;
e->multicast = m10gmulticast;
return 0;
}
void
etherm10glink(void)
{
addethercard("m10g", m10gpnp);
}