ref: ecba7822e316d6cb8370eec97862215402811e82
dir: /sys/src/9/pc/pci.c/
/*
* PCI support code.
* Needs a massive rewrite.
*/
#include "u.h"
#include "../port/lib.h"
#include "mem.h"
#include "dat.h"
#include "fns.h"
#include "io.h"
#include "../port/error.h"
#define DBG if(0) print
enum
{ /* configuration mechanism #1 */
PciADDR = 0xCF8, /* CONFIG_ADDRESS */
PciDATA = 0xCFC, /* CONFIG_DATA */
/* configuration mechanism #2 */
PciCSE = 0xCF8, /* configuration space enable */
PciFORWARD = 0xCFA, /* which bus */
MaxFNO = 7,
MaxUBN = 255,
};
enum
{ /* command register */
IOen = (1<<0),
MEMen = (1<<1),
MASen = (1<<2),
MemWrInv = (1<<4),
PErrEn = (1<<6),
SErrEn = (1<<8),
};
static Lock pcicfglock;
static Lock pcicfginitlock;
static int pcicfgmode = -1;
static int pcimaxbno = 255;
static int pcimaxdno;
static Pcidev* pciroot;
static Pcidev* pcilist;
static Pcidev* pcitail;
static int nobios, nopcirouting;
static BIOS32si* pcibiossi;
static int pcicfgrw8raw(int, int, int, int);
static int pcicfgrw16raw(int, int, int, int);
static int pcicfgrw32raw(int, int, int, int);
static int (*pcicfgrw8)(int, int, int, int) = pcicfgrw8raw;
static int (*pcicfgrw16)(int, int, int, int) = pcicfgrw16raw;
static int (*pcicfgrw32)(int, int, int, int) = pcicfgrw32raw;
static char* bustypes[] = {
"CBUSI",
"CBUSII",
"EISA",
"FUTURE",
"INTERN",
"ISA",
"MBI",
"MBII",
"MCA",
"MPI",
"MPSA",
"NUBUS",
"PCI",
"PCMCIA",
"TC",
"VL",
"VME",
"XPRESS",
};
static int
tbdffmt(Fmt* fmt)
{
char *p;
int l, r;
uint type, tbdf;
if((p = malloc(READSTR)) == nil)
return fmtstrcpy(fmt, "(tbdfconv)");
switch(fmt->r){
case 'T':
tbdf = va_arg(fmt->args, int);
if(tbdf == BUSUNKNOWN)
snprint(p, READSTR, "unknown");
else{
type = BUSTYPE(tbdf);
if(type < nelem(bustypes))
l = snprint(p, READSTR, bustypes[type]);
else
l = snprint(p, READSTR, "%d", type);
snprint(p+l, READSTR-l, ".%d.%d.%d",
BUSBNO(tbdf), BUSDNO(tbdf), BUSFNO(tbdf));
}
break;
default:
snprint(p, READSTR, "(tbdfconv)");
break;
}
r = fmtstrcpy(fmt, p);
free(p);
return r;
}
ulong
pcibarsize(Pcidev *p, int rno)
{
ulong v, size;
v = pcicfgrw32(p->tbdf, rno, 0, 1);
pcicfgrw32(p->tbdf, rno, 0xFFFFFFF0, 0);
size = pcicfgrw32(p->tbdf, rno, 0, 1);
if(v & 1)
size |= 0xFFFF0000;
pcicfgrw32(p->tbdf, rno, v, 0);
return -(size & ~0x0F);
}
static int
pcisizcmp(void *a, void *b)
{
Pcisiz *aa, *bb;
aa = a;
bb = b;
return aa->siz - bb->siz;
}
static ulong
pcimask(ulong v)
{
ulong m;
m = BI2BY*sizeof(v);
for(m = 1<<(m-1); m != 0; m >>= 1) {
if(m & v)
break;
}
m--;
if((v & m) == 0)
return v;
v |= m;
return v+1;
}
static void
pcibusmap(Pcidev *root, ulong *pmema, ulong *pioa, int wrreg)
{
Pcidev *p;
int ntb, i, size, rno, hole;
ulong v, mema, ioa, sioa, smema, base, limit;
Pcisiz *table, *tptr, *mtb, *itb;
if(!nobios)
return;
ioa = *pioa;
mema = *pmema;
DBG("pcibusmap wr=%d %T mem=%luX io=%luX\n",
wrreg, root->tbdf, mema, ioa);
ntb = 0;
for(p = root; p != nil; p = p->link)
ntb++;
ntb *= (PciCIS-PciBAR0)/4;
table = malloc(2*ntb*sizeof(Pcisiz));
if(table == nil)
panic("pcibusmap: can't allocate memory");
itb = table;
mtb = table+ntb;
/*
* Build a table of sizes
*/
for(p = root; p != nil; p = p->link) {
if(p->ccrb == 0x06) {
if(p->ccru != 0x04 || p->bridge == nil) {
DBG("pci: ignored bridge %T\n", p->tbdf);
continue;
}
sioa = ioa;
smema = mema;
pcibusmap(p->bridge, &smema, &sioa, 0);
hole = pcimask(smema-mema);
if(hole < (1<<20))
hole = 1<<20;
p->mema.size = hole;
hole = pcimask(sioa-ioa);
if(hole < (1<<12))
hole = 1<<12;
p->ioa.size = hole;
itb->dev = p;
itb->bar = -1;
itb->siz = p->ioa.size;
itb++;
mtb->dev = p;
mtb->bar = -1;
mtb->siz = p->mema.size;
mtb++;
continue;
}
for(i = 0; i <= 5; i++) {
rno = PciBAR0 + i*4;
v = pcicfgrw32(p->tbdf, rno, 0, 1);
size = pcibarsize(p, rno);
if(size == 0)
continue;
p->mem[i].size = size;
if(v & 1) {
itb->dev = p;
itb->bar = i;
itb->siz = size;
itb++;
}
else {
mtb->dev = p;
mtb->bar = i;
mtb->siz = size;
mtb++;
if((v & 7) == 4)
i++;
}
}
}
/*
* Sort both tables IO smallest first, Memory largest
*/
qsort(table, itb-table, sizeof(Pcisiz), pcisizcmp);
tptr = table+ntb;
qsort(tptr, mtb-tptr, sizeof(Pcisiz), pcisizcmp);
/*
* Allocate IO address space on this bus
*/
for(tptr = table; tptr < itb; tptr++) {
hole = tptr->siz;
if(tptr->bar == -1)
hole = 1<<12;
ioa = (ioa+hole-1) & ~(hole-1);
p = tptr->dev;
if(tptr->bar == -1)
p->ioa.bar = ioa;
else {
p->pcr |= IOen;
p->mem[tptr->bar].bar = ioa|1;
if(wrreg)
pcicfgrw32(p->tbdf, PciBAR0+(tptr->bar*4), ioa|1, 0);
}
ioa += tptr->siz;
}
/*
* Allocate Memory address space on this bus
*/
for(tptr = table+ntb; tptr < mtb; tptr++) {
hole = tptr->siz;
if(tptr->bar == -1)
hole = 1<<20;
mema = (mema+hole-1) & ~(hole-1);
p = tptr->dev;
if(tptr->bar == -1)
p->mema.bar = mema;
else {
p->pcr |= MEMen;
p->mem[tptr->bar].bar = mema;
if(wrreg)
pcicfgrw32(p->tbdf, PciBAR0+(tptr->bar*4), mema, 0);
}
mema += tptr->siz;
}
*pmema = mema;
*pioa = ioa;
free(table);
if(wrreg == 0)
return;
/*
* Finally set all the bridge addresses & registers
*/
for(p = root; p != nil; p = p->link) {
if(p->bridge == nil) {
pcicfgrw8(p->tbdf, PciLTR, 64, 0);
p->pcr |= MASen;
pcicfgrw16(p->tbdf, PciPCR, p->pcr, 0);
continue;
}
base = p->ioa.bar;
limit = base+p->ioa.size-1;
v = pcicfgrw32(p->tbdf, PciIBR, 0, 1);
v = (v&0xFFFF0000)|(limit & 0xF000)|((base & 0xF000)>>8);
pcicfgrw32(p->tbdf, PciIBR, v, 0);
v = (limit & 0xFFFF0000)|(base>>16);
pcicfgrw32(p->tbdf, PciIUBR, v, 0);
base = p->mema.bar;
limit = base+p->mema.size-1;
v = (limit & 0xFFF00000)|((base & 0xFFF00000)>>16);
pcicfgrw32(p->tbdf, PciMBR, v, 0);
/*
* Disable memory prefetch
*/
pcicfgrw32(p->tbdf, PciPMBR, 0x0000FFFF, 0);
pcicfgrw8(p->tbdf, PciLTR, 64, 0);
/*
* Enable the bridge
*/
p->pcr |= IOen|MEMen|MASen;
pcicfgrw32(p->tbdf, PciPCR, 0xFFFF0000|p->pcr , 0);
sioa = p->ioa.bar;
smema = p->mema.bar;
pcibusmap(p->bridge, &smema, &sioa, 1);
}
}
static int
pcilscan(int bno, Pcidev** list, Pcidev *parent)
{
Pcidev *p, *head, *tail;
int dno, fno, i, hdt, l, maxfno, maxubn, rno, sbn, tbdf, ubn;
maxubn = bno;
head = nil;
tail = nil;
for(dno = 0; dno <= pcimaxdno; dno++){
maxfno = 0;
for(fno = 0; fno <= maxfno; fno++){
/*
* For this possible device, form the
* bus+device+function triplet needed to address it
* and try to read the vendor and device ID.
* If successful, allocate a device struct and
* start to fill it in with some useful information
* from the device's configuration space.
*/
tbdf = MKBUS(BusPCI, bno, dno, fno);
l = pcicfgrw32(tbdf, PciVID, 0, 1);
if(l == 0xFFFFFFFF || l == 0)
continue;
p = malloc(sizeof(*p));
if(p == nil)
panic("pcilscan: can't allocate memory");
p->tbdf = tbdf;
p->vid = l;
p->did = l>>16;
if(pcilist != nil)
pcitail->list = p;
else
pcilist = p;
pcitail = p;
p->pcr = pcicfgr16(p, PciPCR);
p->rid = pcicfgr8(p, PciRID);
p->ccrp = pcicfgr8(p, PciCCRp);
p->ccru = pcicfgr8(p, PciCCRu);
p->ccrb = pcicfgr8(p, PciCCRb);
p->cls = pcicfgr8(p, PciCLS);
p->ltr = pcicfgr8(p, PciLTR);
p->intl = pcicfgr8(p, PciINTL);
/*
* If the device is a multi-function device adjust the
* loop count so all possible functions are checked.
*/
hdt = pcicfgr8(p, PciHDT);
if(hdt & 0x80)
maxfno = MaxFNO;
/*
* If appropriate, read the base address registers
* and work out the sizes.
*/
switch(p->ccrb) {
case 0x00: /* prehistoric */
case 0x01: /* mass storage controller */
case 0x02: /* network controller */
case 0x03: /* display controller */
case 0x04: /* multimedia device */
case 0x07: /* simple comm. controllers */
case 0x08: /* base system peripherals */
case 0x09: /* input devices */
case 0x0A: /* docking stations */
case 0x0B: /* processors */
case 0x0C: /* serial bus controllers */
case 0x0D: /* wireless controllers */
case 0x0E: /* intelligent I/O controllers */
case 0x0F: /* sattelite communication controllers */
case 0x10: /* encryption/decryption controllers */
case 0x11: /* signal processing controllers */
if((hdt & 0x7F) != 0)
break;
rno = PciBAR0;
for(i = 0; i <= 5; i++) {
p->mem[i].bar = pcicfgr32(p, rno);
p->mem[i].size = pcibarsize(p, rno);
if((p->mem[i].bar & 7) == 4 && i < 5){
ulong hi;
rno += 4;
hi = pcicfgr32(p, rno);
if(hi != 0){
print("ignoring 64-bit bar %d: %llux %d from %T\n",
i, (uvlong)hi<<32 | p->mem[i].bar, p->mem[i].size, p->tbdf);
p->mem[i].bar = 0;
p->mem[i].size = 0;
}
i++;
}
rno += 4;
}
break;
case 0x05: /* memory controller */
case 0x06: /* bridge device */
default:
break;
}
p->parent = parent;
if(head != nil)
tail->link = p;
else
head = p;
tail = p;
}
}
*list = head;
for(p = head; p != nil; p = p->link){
/*
* Find PCI-PCI bridges and recursively descend the tree.
*/
if(p->ccrb != 0x06 || p->ccru != 0x04)
continue;
/*
* If the secondary or subordinate bus number is not
* initialised try to do what the PCI BIOS should have
* done and fill in the numbers as the tree is descended.
* On the way down the subordinate bus number is set to
* the maximum as it's not known how many buses are behind
* this one; the final value is set on the way back up.
*/
sbn = pcicfgr8(p, PciSBN);
ubn = pcicfgr8(p, PciUBN);
if(sbn == 0 || ubn == 0 || nobios) {
sbn = maxubn+1;
/*
* Make sure memory, I/O and master enables are
* off, set the primary, secondary and subordinate
* bus numbers and clear the secondary status before
* attempting to scan the secondary bus.
*
* Initialisation of the bridge should be done here.
*/
pcicfgw32(p, PciPCR, 0xFFFF0000);
l = (MaxUBN<<16)|(sbn<<8)|bno;
pcicfgw32(p, PciPBN, l);
pcicfgw16(p, PciSPSR, 0xFFFF);
maxubn = pcilscan(sbn, &p->bridge, p);
l = (maxubn<<16)|(sbn<<8)|bno;
pcicfgw32(p, PciPBN, l);
}
else {
if(ubn > maxubn)
maxubn = ubn;
pcilscan(sbn, &p->bridge, p);
}
}
return maxubn;
}
int
pciscan(int bno, Pcidev **list)
{
int ubn;
lock(&pcicfginitlock);
ubn = pcilscan(bno, list, nil);
unlock(&pcicfginitlock);
return ubn;
}
static uchar
pIIxget(Pcidev *router, uchar link)
{
uchar pirq;
/* link should be 0x60, 0x61, 0x62, 0x63 */
pirq = pcicfgr8(router, link);
return (pirq < 16)? pirq: 0;
}
static void
pIIxset(Pcidev *router, uchar link, uchar irq)
{
pcicfgw8(router, link, irq);
}
static uchar
viaget(Pcidev *router, uchar link)
{
uchar pirq;
/* link should be 1, 2, 3, 5 */
pirq = (link < 6)? pcicfgr8(router, 0x55 + (link>>1)): 0;
return (link & 1)? (pirq >> 4): (pirq & 15);
}
static void
viaset(Pcidev *router, uchar link, uchar irq)
{
uchar pirq;
pirq = pcicfgr8(router, 0x55 + (link >> 1));
pirq &= (link & 1)? 0x0f: 0xf0;
pirq |= (link & 1)? (irq << 4): (irq & 15);
pcicfgw8(router, 0x55 + (link>>1), pirq);
}
static uchar
optiget(Pcidev *router, uchar link)
{
uchar pirq = 0;
/* link should be 0x02, 0x12, 0x22, 0x32 */
if ((link & 0xcf) == 0x02)
pirq = pcicfgr8(router, 0xb8 + (link >> 5));
return (link & 0x10)? (pirq >> 4): (pirq & 15);
}
static void
optiset(Pcidev *router, uchar link, uchar irq)
{
uchar pirq;
pirq = pcicfgr8(router, 0xb8 + (link >> 5));
pirq &= (link & 0x10)? 0x0f : 0xf0;
pirq |= (link & 0x10)? (irq << 4): (irq & 15);
pcicfgw8(router, 0xb8 + (link >> 5), pirq);
}
static uchar
aliget(Pcidev *router, uchar link)
{
/* No, you're not dreaming */
static const uchar map[] = { 0, 9, 3, 10, 4, 5, 7, 6, 1, 11, 0, 12, 0, 14, 0, 15 };
uchar pirq;
/* link should be 0x01..0x08 */
pirq = pcicfgr8(router, 0x48 + ((link-1)>>1));
return (link & 1)? map[pirq&15]: map[pirq>>4];
}
static void
aliset(Pcidev *router, uchar link, uchar irq)
{
/* Inverse of map in aliget */
static const uchar map[] = { 0, 8, 0, 2, 4, 5, 7, 6, 0, 1, 3, 9, 11, 0, 13, 15 };
uchar pirq;
pirq = pcicfgr8(router, 0x48 + ((link-1)>>1));
pirq &= (link & 1)? 0x0f: 0xf0;
pirq |= (link & 1)? (map[irq] << 4): (map[irq] & 15);
pcicfgw8(router, 0x48 + ((link-1)>>1), pirq);
}
static uchar
cyrixget(Pcidev *router, uchar link)
{
uchar pirq;
/* link should be 1, 2, 3, 4 */
pirq = pcicfgr8(router, 0x5c + ((link-1)>>1));
return ((link & 1)? pirq >> 4: pirq & 15);
}
static void
cyrixset(Pcidev *router, uchar link, uchar irq)
{
uchar pirq;
pirq = pcicfgr8(router, 0x5c + (link>>1));
pirq &= (link & 1)? 0x0f: 0xf0;
pirq |= (link & 1)? (irq << 4): (irq & 15);
pcicfgw8(router, 0x5c + (link>>1), pirq);
}
typedef struct Bridge Bridge;
struct Bridge
{
ushort vid;
ushort did;
uchar (*get)(Pcidev *, uchar);
void (*set)(Pcidev *, uchar, uchar);
};
static Bridge southbridges[] = {
{ 0x8086, 0x122e, pIIxget, pIIxset }, /* Intel 82371FB */
{ 0x8086, 0x1234, pIIxget, pIIxset }, /* Intel 82371MX */
{ 0x8086, 0x7000, pIIxget, pIIxset }, /* Intel 82371SB */
{ 0x8086, 0x7110, pIIxget, pIIxset }, /* Intel 82371AB */
{ 0x8086, 0x7198, pIIxget, pIIxset }, /* Intel 82443MX (fn 1) */
{ 0x8086, 0x2410, pIIxget, pIIxset }, /* Intel 82801AA */
{ 0x8086, 0x2420, pIIxget, pIIxset }, /* Intel 82801AB */
{ 0x8086, 0x2440, pIIxget, pIIxset }, /* Intel 82801BA */
{ 0x8086, 0x2448, pIIxget, pIIxset }, /* Intel 82801BAM/CAM/DBM */
{ 0x8086, 0x244c, pIIxget, pIIxset }, /* Intel 82801BAM */
{ 0x8086, 0x244e, pIIxget, pIIxset }, /* Intel 82801 */
{ 0x8086, 0x2480, pIIxget, pIIxset }, /* Intel 82801CA */
{ 0x8086, 0x248c, pIIxget, pIIxset }, /* Intel 82801CAM */
{ 0x8086, 0x24c0, pIIxget, pIIxset }, /* Intel 82801DBL */
{ 0x8086, 0x24cc, pIIxget, pIIxset }, /* Intel 82801DBM */
{ 0x8086, 0x24d0, pIIxget, pIIxset }, /* Intel 82801EB */
{ 0x8086, 0x25a1, pIIxget, pIIxset }, /* Intel 6300ESB */
{ 0x8086, 0x2640, pIIxget, pIIxset }, /* Intel 82801FB */
{ 0x8086, 0x2641, pIIxget, pIIxset }, /* Intel 82801FBM */
{ 0x8086, 0x2670, pIIxget, pIIxset }, /* Intel 632xesb */
{ 0x8086, 0x27b8, pIIxget, pIIxset }, /* Intel 82801GB */
{ 0x8086, 0x27b9, pIIxget, pIIxset }, /* Intel 82801GBM */
{ 0x8086, 0x27bd, pIIxget, pIIxset }, /* Intel 82801GB/GR */
{ 0x8086, 0x3a16, pIIxget, pIIxset }, /* Intel 82801JIR */
{ 0x8086, 0x3a40, pIIxget, pIIxset }, /* Intel 82801JI */
{ 0x8086, 0x3a42, pIIxget, pIIxset }, /* Intel 82801JI */
{ 0x8086, 0x3a48, pIIxget, pIIxset }, /* Intel 82801JI */
{ 0x8086, 0x2916, pIIxget, pIIxset }, /* Intel 82801? */
{ 0x8086, 0x1c02, pIIxget, pIIxset }, /* Intel 6 Series/C200 */
{ 0x8086, 0x1e53, pIIxget, pIIxset }, /* Intel 7 Series/C216 */
{ 0x8086, 0x8c56, pIIxget, pIIxset }, /* Intel 8 Series/C226 */
{ 0x8086, 0x2810, pIIxget, pIIxset }, /* Intel 82801HB/HR (ich8/r) */
{ 0x8086, 0x2812, pIIxget, pIIxset }, /* Intel 82801HH (ich8dh) */
{ 0x8086, 0x2912, pIIxget, pIIxset }, /* Intel 82801ih ich9dh */
{ 0x8086, 0x2914, pIIxget, pIIxset }, /* Intel 82801io ich9do */
{ 0x8086, 0x2916, pIIxget, pIIxset }, /* Intel 82801ibr ich9r */
{ 0x8086, 0x2917, pIIxget, pIIxset }, /* Intel 82801iem ich9m-e */
{ 0x8086, 0x2918, pIIxget, pIIxset }, /* Intel 82801ib ich9 */
{ 0x8086, 0x2919, pIIxget, pIIxset }, /* Intel 82801? ich9m */
{ 0x8086, 0x3a16, pIIxget, pIIxset }, /* Intel 82801jir ich10r */
{ 0x8086, 0x3a18, pIIxget, pIIxset }, /* Intel 82801jib ich10 */
{ 0x8086, 0x3a40, pIIxget, pIIxset }, /* Intel 82801ji */
{ 0x8086, 0x3a42, pIIxget, pIIxset }, /* Intel 82801ji */
{ 0x8086, 0x3a48, pIIxget, pIIxset }, /* Intel 82801ji */
{ 0x8086, 0x3b06, pIIxget, pIIxset }, /* Intel 82801? ibex peak */
{ 0x8086, 0x3b14, pIIxget, pIIxset }, /* Intel 82801? 3420 */
{ 0x8086, 0x1c49, pIIxget, pIIxset }, /* Intel 82hm65 cougar point pch */
{ 0x8086, 0x1c4b, pIIxget, pIIxset }, /* Intel 82hm67 */
{ 0x8086, 0x1c4f, pIIxget, pIIxset }, /* Intel 82qm67 cougar point pch */
{ 0x8086, 0x1c52, pIIxget, pIIxset }, /* Intel 82q65 cougar point pch */
{ 0x8086, 0x1c54, pIIxget, pIIxset }, /* Intel 82q67 cougar point pch */
{ 0x8086, 0x1e55, pIIxget, pIIxset }, /* Intel QM77 panter point lpc */
{ 0x1106, 0x0586, viaget, viaset }, /* Viatech 82C586 */
{ 0x1106, 0x0596, viaget, viaset }, /* Viatech 82C596 */
{ 0x1106, 0x0686, viaget, viaset }, /* Viatech 82C686 */
{ 0x1106, 0x3177, viaget, viaset }, /* Viatech VT8235 */
{ 0x1106, 0x3227, viaget, viaset }, /* Viatech VT8237 */
{ 0x1106, 0x3287, viaget, viaset }, /* Viatech VT8251 */
{ 0x1106, 0x8410, viaget, viaset }, /* Viatech PV530 bridge */
{ 0x1045, 0xc700, optiget, optiset }, /* Opti 82C700 */
{ 0x10b9, 0x1533, aliget, aliset }, /* Al M1533 */
{ 0x1039, 0x0008, pIIxget, pIIxset }, /* SI 503 */
{ 0x1039, 0x0496, pIIxget, pIIxset }, /* SI 496 */
{ 0x1078, 0x0100, cyrixget, cyrixset }, /* Cyrix 5530 Legacy */
{ 0x1022, 0x790e, nil, nil }, /* AMD FCH LPC bridge */
{ 0x1022, 0x746b, nil, nil }, /* AMD 8111 */
{ 0x10de, 0x00d1, nil, nil }, /* NVIDIA nForce 3 */
{ 0x10de, 0x00e0, nil, nil }, /* NVIDIA nForce 3 250 Series */
{ 0x10de, 0x00e1, nil, nil }, /* NVIDIA nForce 3 250 Series */
{ 0x1166, 0x0200, nil, nil }, /* ServerWorks ServerSet III LE */
{ 0x1002, 0x4377, nil, nil }, /* ATI Radeon Xpress 200M */
{ 0x1002, 0x4372, nil, nil }, /* ATI SB400 */
{ 0x1002, 0x9601, nil, nil }, /* AMD SB710 */
{ 0x1002, 0x438d, nil, nil }, /* AMD SB600 */
{ 0x1002, 0x439d, nil, nil }, /* AMD SB810 */
};
typedef struct Slot Slot;
struct Slot {
uchar bus; /* Pci bus number */
uchar dev; /* Pci device number */
uchar maps[12]; /* Avoid structs! Link and mask. */
uchar slot; /* Add-in/built-in slot */
uchar reserved;
};
typedef struct Router Router;
struct Router {
uchar signature[4]; /* Routing table signature */
uchar version[2]; /* Version number */
uchar size[2]; /* Total table size */
uchar bus; /* Interrupt router bus number */
uchar devfn; /* Router's devfunc */
uchar pciirqs[2]; /* Exclusive PCI irqs */
uchar compat[4]; /* Compatible PCI interrupt router */
uchar miniport[4]; /* Miniport data */
uchar reserved[11];
uchar checksum;
};
static ushort pciirqs; /* Exclusive PCI irqs */
static Bridge *southbridge; /* Which southbridge to use. */
static void
pcirouting(void)
{
Slot *e;
Router *r;
int i, size, tbdf;
Pcidev *sbpci, *pci;
uchar *p, pin, irq, link, *map;
if((p = sigsearch("$PIR", 0)) == nil)
return;
r = (Router*)p;
size = (r->size[1] << 8)|r->size[0];
if(size < sizeof(Router) || checksum(r, size))
return;
if(0) print("PCI interrupt routing table version %d.%d at %p\n",
r->version[0], r->version[1], r);
tbdf = MKBUS(BusPCI, r->bus, (r->devfn>>3)&0x1f, r->devfn&7);
sbpci = pcimatchtbdf(tbdf);
if(sbpci == nil) {
print("pcirouting: Cannot find south bridge %T\n", tbdf);
return;
}
for(i = 0; i < nelem(southbridges); i++)
if(sbpci->vid == southbridges[i].vid && sbpci->did == southbridges[i].did)
break;
if(i == nelem(southbridges)) {
print("pcirouting: ignoring south bridge %T %.4uX/%.4uX\n", tbdf, sbpci->vid, sbpci->did);
return;
}
southbridge = &southbridges[i];
if(southbridge->get == nil)
return;
pciirqs = (r->pciirqs[1] << 8)|r->pciirqs[0];
for(e = (Slot *)&r[1]; (uchar *)e < p + size; e++) {
if(0) {
print("%.2uX/%.2uX %.2uX: ", e->bus, e->dev, e->slot);
for (i = 0; i < 4; i++) {
map = &e->maps[i * 3];
print("[%d] %.2uX %.4uX ", i, map[0], (map[2] << 8)|map[1]);
}
print("\n");
}
for(i = 0; i < 8; i++) {
tbdf = MKBUS(BusPCI, e->bus, (e->dev>>3)&0x1f, i);
pci = pcimatchtbdf(tbdf);
if(pci == nil)
continue;
pin = pcicfgr8(pci, PciINTP);
if(pin == 0 || pin == 0xff)
continue;
map = &e->maps[((pin - 1) % 4) * 3];
link = map[0];
irq = southbridge->get(sbpci, link);
if(irq == pci->intl)
continue;
if(irq == 0 || (irq & 0x80) != 0){
irq = pci->intl;
if(irq == 0 || irq == 0xff)
continue;
if(southbridge->set == nil)
continue;
southbridge->set(sbpci, link, irq);
}
print("pcirouting: %T at pin %d link %.2uX irq %d -> %d\n", tbdf, pin, link, pci->intl, irq);
pcicfgw8(pci, PciINTL, irq);
pci->intl = irq;
}
}
}
static void pcireservemem(void);
static int
pcicfgrw8bios(int tbdf, int rno, int data, int read)
{
BIOS32ci ci;
if(pcibiossi == nil)
return -1;
memset(&ci, 0, sizeof(BIOS32ci));
ci.ebx = (BUSBNO(tbdf)<<8)|(BUSDNO(tbdf)<<3)|BUSFNO(tbdf);
ci.edi = rno;
if(read){
ci.eax = 0xB108;
if(!bios32ci(pcibiossi, &ci)/* && !(ci.eax & 0xFF)*/)
return ci.ecx & 0xFF;
}
else{
ci.eax = 0xB10B;
ci.ecx = data & 0xFF;
if(!bios32ci(pcibiossi, &ci)/* && !(ci.eax & 0xFF)*/)
return 0;
}
return -1;
}
static int
pcicfgrw16bios(int tbdf, int rno, int data, int read)
{
BIOS32ci ci;
if(pcibiossi == nil)
return -1;
memset(&ci, 0, sizeof(BIOS32ci));
ci.ebx = (BUSBNO(tbdf)<<8)|(BUSDNO(tbdf)<<3)|BUSFNO(tbdf);
ci.edi = rno;
if(read){
ci.eax = 0xB109;
if(!bios32ci(pcibiossi, &ci)/* && !(ci.eax & 0xFF)*/)
return ci.ecx & 0xFFFF;
}
else{
ci.eax = 0xB10C;
ci.ecx = data & 0xFFFF;
if(!bios32ci(pcibiossi, &ci)/* && !(ci.eax & 0xFF)*/)
return 0;
}
return -1;
}
static int
pcicfgrw32bios(int tbdf, int rno, int data, int read)
{
BIOS32ci ci;
if(pcibiossi == nil)
return -1;
memset(&ci, 0, sizeof(BIOS32ci));
ci.ebx = (BUSBNO(tbdf)<<8)|(BUSDNO(tbdf)<<3)|BUSFNO(tbdf);
ci.edi = rno;
if(read){
ci.eax = 0xB10A;
if(!bios32ci(pcibiossi, &ci)/* && !(ci.eax & 0xFF)*/)
return ci.ecx;
}
else{
ci.eax = 0xB10D;
ci.ecx = data;
if(!bios32ci(pcibiossi, &ci)/* && !(ci.eax & 0xFF)*/)
return 0;
}
return -1;
}
static BIOS32si*
pcibiosinit(void)
{
BIOS32ci ci;
BIOS32si *si;
if((si = bios32open("$PCI")) == nil)
return nil;
memset(&ci, 0, sizeof(BIOS32ci));
ci.eax = 0xB101;
if(bios32ci(si, &ci) || ci.edx != ((' '<<24)|('I'<<16)|('C'<<8)|'P')){
free(si);
return nil;
}
if(ci.eax & 0x01)
pcimaxdno = 31;
else
pcimaxdno = 15;
pcimaxbno = ci.ecx & 0xff;
return si;
}
void
pcibussize(Pcidev *root, ulong *msize, ulong *iosize)
{
*msize = 0;
*iosize = 0;
pcibusmap(root, msize, iosize, 0);
}
static void
pcicfginit(void)
{
char *p;
Pcidev **list;
ulong mema, ioa;
int bno, n, pcibios;
lock(&pcicfginitlock);
if(pcicfgmode != -1)
goto out;
pcibios = 0;
if(getconf("*nobios"))
nobios = 1;
else if(getconf("*pcibios"))
pcibios = 1;
if(getconf("*nopcirouting"))
nopcirouting = 1;
/*
* Try to determine which PCI configuration mode is implemented.
* Mode2 uses a byte at 0xCF8 and another at 0xCFA; Mode1 uses
* a DWORD at 0xCF8 and another at 0xCFC and will pass through
* any non-DWORD accesses as normal I/O cycles. There shouldn't be
* a device behind these addresses so if Mode1 accesses fail try
* for Mode2 (Mode2 is deprecated).
*/
if(!pcibios){
/*
* Bits [30:24] of PciADDR must be 0,
* according to the spec.
*/
n = inl(PciADDR);
if(!(n & 0x7F000000)){
outl(PciADDR, 0x80000000);
outb(PciADDR+3, 0);
if(inl(PciADDR) & 0x80000000){
pcicfgmode = 1;
pcimaxdno = 31;
}
}
outl(PciADDR, n);
if(pcicfgmode < 0){
/*
* The 'key' part of PciCSE should be 0.
*/
n = inb(PciCSE);
if(!(n & 0xF0)){
outb(PciCSE, 0x0E);
if(inb(PciCSE) == 0x0E){
pcicfgmode = 2;
pcimaxdno = 15;
}
}
outb(PciCSE, n);
}
}
if(pcicfgmode < 0 || pcibios) {
if((pcibiossi = pcibiosinit()) == nil)
goto out;
pcicfgrw8 = pcicfgrw8bios;
pcicfgrw16 = pcicfgrw16bios;
pcicfgrw32 = pcicfgrw32bios;
pcicfgmode = 3;
}
fmtinstall('T', tbdffmt);
if(p = getconf("*pcimaxbno"))
pcimaxbno = strtoul(p, 0, 0);
if(p = getconf("*pcimaxdno")){
n = strtoul(p, 0, 0);
if(n < pcimaxdno)
pcimaxdno = n;
}
list = &pciroot;
for(bno = 0; bno <= pcimaxbno; bno++) {
int sbno = bno;
bno = pcilscan(bno, list, nil);
while(*list)
list = &(*list)->link;
if (sbno == 0) {
Pcidev *pci;
/*
* If we have found a PCI-to-Cardbus bridge, make sure
* it has no valid mappings anymore.
*/
for(pci = pciroot; pci != nil; pci = pci->link){
if (pci->ccrb == 6 && pci->ccru == 7) {
ushort bcr;
/* reset the cardbus */
bcr = pcicfgr16(pci, PciBCR);
pcicfgw16(pci, PciBCR, 0x40 | bcr);
delay(50);
}
}
}
}
if(pciroot == nil)
goto out;
if(nobios) {
/*
* Work out how big the top bus is
*/
pcibussize(pciroot, &mema, &ioa);
/*
* Align the windows and map it
*/
ioa = 0x1000;
mema = 0x90000000;
DBG("Mask sizes: mem=%lux io=%lux\n", mema, ioa);
pcibusmap(pciroot, &mema, &ioa, 1);
DBG("Sizes2: mem=%lux io=%lux\n", mema, ioa);
goto out;
}
if(!nopcirouting)
pcirouting();
out:
pcireservemem();
unlock(&pcicfginitlock);
if(getconf("*pcihinv"))
pcihinv(nil);
}
static void
pcireservemem(void)
{
int i;
Pcidev *p;
/*
* mark all the physical address space claimed by pci devices
* as in use, so that upaalloc doesn't give it out.
*/
for(p=pciroot; p; p=p->list)
for(i=0; i<nelem(p->mem); i++)
if((p->mem[i].bar&~4) != 0 && (p->mem[i].bar&1) == 0)
upaalloc(p->mem[i].bar&~0x0F, p->mem[i].size, 0);
}
static int
pcicfgrw8raw(int tbdf, int rno, int data, int read)
{
int o, type, x;
if(pcicfgmode == -1)
pcicfginit();
if(BUSBNO(tbdf))
type = 0x01;
else
type = 0x00;
x = -1;
if(BUSDNO(tbdf) > pcimaxdno)
return x;
lock(&pcicfglock);
switch(pcicfgmode){
case 1:
o = rno & 0x03;
rno &= ~0x03;
outl(PciADDR, 0x80000000|BUSBDF(tbdf)|rno|type);
if(read)
x = inb(PciDATA+o);
else
outb(PciDATA+o, data);
outl(PciADDR, 0);
break;
case 2:
outb(PciCSE, 0x80|(BUSFNO(tbdf)<<1));
outb(PciFORWARD, BUSBNO(tbdf));
if(read)
x = inb((0xC000|(BUSDNO(tbdf)<<8)) + rno);
else
outb((0xC000|(BUSDNO(tbdf)<<8)) + rno, data);
outb(PciCSE, 0);
break;
}
unlock(&pcicfglock);
return x;
}
int
pcicfgr8(Pcidev* pcidev, int rno)
{
return pcicfgrw8(pcidev->tbdf, rno, 0, 1);
}
void
pcicfgw8(Pcidev* pcidev, int rno, int data)
{
pcicfgrw8(pcidev->tbdf, rno, data, 0);
}
static int
pcicfgrw16raw(int tbdf, int rno, int data, int read)
{
int o, type, x;
if(pcicfgmode == -1)
pcicfginit();
if(BUSBNO(tbdf))
type = 0x01;
else
type = 0x00;
x = -1;
if(BUSDNO(tbdf) > pcimaxdno)
return x;
lock(&pcicfglock);
switch(pcicfgmode){
case 1:
o = rno & 0x02;
rno &= ~0x03;
outl(PciADDR, 0x80000000|BUSBDF(tbdf)|rno|type);
if(read)
x = ins(PciDATA+o);
else
outs(PciDATA+o, data);
outl(PciADDR, 0);
break;
case 2:
outb(PciCSE, 0x80|(BUSFNO(tbdf)<<1));
outb(PciFORWARD, BUSBNO(tbdf));
if(read)
x = ins((0xC000|(BUSDNO(tbdf)<<8)) + rno);
else
outs((0xC000|(BUSDNO(tbdf)<<8)) + rno, data);
outb(PciCSE, 0);
break;
}
unlock(&pcicfglock);
return x;
}
int
pcicfgr16(Pcidev* pcidev, int rno)
{
return pcicfgrw16(pcidev->tbdf, rno, 0, 1);
}
void
pcicfgw16(Pcidev* pcidev, int rno, int data)
{
pcicfgrw16(pcidev->tbdf, rno, data, 0);
}
static int
pcicfgrw32raw(int tbdf, int rno, int data, int read)
{
int type, x;
if(pcicfgmode == -1)
pcicfginit();
if(BUSBNO(tbdf))
type = 0x01;
else
type = 0x00;
x = -1;
if(BUSDNO(tbdf) > pcimaxdno)
return x;
lock(&pcicfglock);
switch(pcicfgmode){
case 1:
rno &= ~0x03;
outl(PciADDR, 0x80000000|BUSBDF(tbdf)|rno|type);
if(read)
x = inl(PciDATA);
else
outl(PciDATA, data);
outl(PciADDR, 0);
break;
case 2:
outb(PciCSE, 0x80|(BUSFNO(tbdf)<<1));
outb(PciFORWARD, BUSBNO(tbdf));
if(read)
x = inl((0xC000|(BUSDNO(tbdf)<<8)) + rno);
else
outl((0xC000|(BUSDNO(tbdf)<<8)) + rno, data);
outb(PciCSE, 0);
break;
}
unlock(&pcicfglock);
return x;
}
int
pcicfgr32(Pcidev* pcidev, int rno)
{
return pcicfgrw32(pcidev->tbdf, rno, 0, 1);
}
void
pcicfgw32(Pcidev* pcidev, int rno, int data)
{
pcicfgrw32(pcidev->tbdf, rno, data, 0);
}
Pcidev*
pcimatch(Pcidev* prev, int vid, int did)
{
if(pcicfgmode == -1)
pcicfginit();
if(prev == nil)
prev = pcilist;
else
prev = prev->list;
while(prev != nil){
if((vid == 0 || prev->vid == vid)
&& (did == 0 || prev->did == did))
break;
prev = prev->list;
}
return prev;
}
Pcidev*
pcimatchtbdf(int tbdf)
{
Pcidev *pcidev;
if(pcicfgmode == -1)
pcicfginit();
for(pcidev = pcilist; pcidev != nil; pcidev = pcidev->list) {
if(pcidev->tbdf == tbdf)
break;
}
return pcidev;
}
uchar
pciipin(Pcidev *pci, uchar pin)
{
if (pci == nil)
pci = pcilist;
while (pci) {
uchar intl;
if (pcicfgr8(pci, PciINTP) == pin && pci->intl != 0 && pci->intl != 0xff)
return pci->intl;
if (pci->bridge && (intl = pciipin(pci->bridge, pin)) != 0)
return intl;
pci = pci->list;
}
return 0;
}
static void
pcilhinv(Pcidev* p)
{
int i;
Pcidev *t;
if(p == nil) {
p = pciroot;
print("bus dev type vid did intl memory\n");
}
for(t = p; t != nil; t = t->link) {
print("%d %2d/%d %.2ux %.2ux %.2ux %.4ux %.4ux %3d ",
BUSBNO(t->tbdf), BUSDNO(t->tbdf), BUSFNO(t->tbdf),
t->ccrb, t->ccru, t->ccrp, t->vid, t->did, t->intl);
for(i = 0; i < nelem(p->mem); i++) {
if(t->mem[i].size == 0)
continue;
print("%d:%.8lux %d ", i,
t->mem[i].bar, t->mem[i].size);
}
if(t->ioa.bar || t->ioa.size)
print("ioa:%.8lux %d ", t->ioa.bar, t->ioa.size);
if(t->mema.bar || t->mema.size)
print("mema:%.8lux %d ", t->mema.bar, t->mema.size);
if(t->bridge)
print("->%d", BUSBNO(t->bridge->tbdf));
print("\n");
}
while(p != nil) {
if(p->bridge != nil)
pcilhinv(p->bridge);
p = p->link;
}
}
void
pcihinv(Pcidev* p)
{
if(pcicfgmode == -1)
pcicfginit();
lock(&pcicfginitlock);
pcilhinv(p);
unlock(&pcicfginitlock);
}
void
pcireset(void)
{
Pcidev *p;
if(pcicfgmode == -1)
pcicfginit();
for(p = pcilist; p != nil; p = p->list) {
/* don't mess with the bridges */
if(p->ccrb == 0x06)
continue;
pciclrbme(p);
}
}
void
pcisetioe(Pcidev* p)
{
p->pcr |= IOen;
pcicfgw16(p, PciPCR, p->pcr);
}
void
pciclrioe(Pcidev* p)
{
p->pcr &= ~IOen;
pcicfgw16(p, PciPCR, p->pcr);
}
void
pcisetbme(Pcidev* p)
{
p->pcr |= MASen;
pcicfgw16(p, PciPCR, p->pcr);
}
void
pciclrbme(Pcidev* p)
{
p->pcr &= ~MASen;
pcicfgw16(p, PciPCR, p->pcr);
}
void
pcisetmwi(Pcidev* p)
{
p->pcr |= MemWrInv;
pcicfgw16(p, PciPCR, p->pcr);
}
void
pciclrmwi(Pcidev* p)
{
p->pcr &= ~MemWrInv;
pcicfgw16(p, PciPCR, p->pcr);
}
static int
enumcaps(Pcidev *p, int (*fmatch)(Pcidev*, int, int, int), int arg)
{
int i, r, cap, off;
/* status register bit 4 has capabilities */
if((pcicfgr16(p, PciPSR) & 1<<4) == 0)
return -1;
switch(pcicfgr8(p, PciHDT) & 0x7F){
default:
return -1;
case 0: /* etc */
case 1: /* pci to pci bridge */
off = 0x34;
break;
case 2: /* cardbus bridge */
off = 0x14;
break;
}
for(i = 48; i--;){
off = pcicfgr8(p, off);
if(off < 0x40 || (off & 3))
break;
off &= ~3;
cap = pcicfgr8(p, off);
if(cap == 0xff)
break;
r = (*fmatch)(p, cap, off, arg);
if(r < 0)
break;
if(r == 0)
return off;
off++;
}
return -1;
}
static int
matchcap(Pcidev *, int cap, int, int arg)
{
return cap != arg;
}
static int
matchhtcap(Pcidev *p, int cap, int off, int arg)
{
int mask;
if(cap != PciCapHTC)
return 1;
if(arg == 0x00 || arg == 0x20)
mask = 0xE0;
else
mask = 0xF8;
cap = pcicfgr8(p, off+3);
return (cap & mask) != arg;
}
int
pcicap(Pcidev *p, int cap)
{
return enumcaps(p, matchcap, cap);
}
int
pcihtcap(Pcidev *p, int cap)
{
return enumcaps(p, matchhtcap, cap);
}
static int
pcigetpmrb(Pcidev* p)
{
if(p->pmrb != 0)
return p->pmrb;
return p->pmrb = pcicap(p, PciCapPMG);
}
int
pcigetpms(Pcidev* p)
{
int pmcsr, ptr;
if((ptr = pcigetpmrb(p)) == -1)
return -1;
/*
* Power Management Register Block:
* offset 0: Capability ID
* 1: next item pointer
* 2: capabilities
* 4: control/status
* 6: bridge support extensions
* 7: data
*/
pmcsr = pcicfgr16(p, ptr+4);
return pmcsr & 0x0003;
}
int
pcisetpms(Pcidev* p, int state)
{
int ostate, pmc, pmcsr, ptr;
if((ptr = pcigetpmrb(p)) == -1)
return -1;
pmc = pcicfgr16(p, ptr+2);
pmcsr = pcicfgr16(p, ptr+4);
ostate = pmcsr & 0x0003;
pmcsr &= ~0x0003;
switch(state){
default:
return -1;
case 0:
break;
case 1:
if(!(pmc & 0x0200))
return -1;
break;
case 2:
if(!(pmc & 0x0400))
return -1;
break;
case 3:
break;
}
pmcsr |= state;
pcicfgw16(p, ptr+4, pmcsr);
return ostate;
}
int
pcinextcap(Pcidev *pci, int offset)
{
if(offset == 0) {
if((pcicfgr16(pci, PciPSR) & (1<<4)) == 0)
return 0; /* no capabilities */
offset = PciCAP-1;
}
return pcicfgr8(pci, offset+1) & ~3;
}
void
pcienable(Pcidev *p)
{
uint pcr;
int i;
if(p == nil)
return;
pcienable(p->parent);
switch(pcisetpms(p, 0)){
case 1:
print("pcienable %T: wakeup from D1\n", p->tbdf);
break;
case 2:
print("pcienable %T: wakeup from D2\n", p->tbdf);
if(p->bridge != nil)
delay(100); /* B2: minimum delay 50ms */
else
delay(1); /* D2: minimum delay 200µs */
break;
case 3:
print("pcienable %T: wakeup from D3\n", p->tbdf);
delay(100); /* D3: minimum delay 50ms */
/* restore registers */
for(i = 0; i < 6; i++)
pcicfgw32(p, PciBAR0+i*4, p->mem[i].bar);
pcicfgw8(p, PciINTL, p->intl);
pcicfgw8(p, PciLTR, p->ltr);
pcicfgw8(p, PciCLS, p->cls);
pcicfgw16(p, PciPCR, p->pcr);
break;
}
if(p->bridge != nil)
pcr = IOen|MEMen|MASen;
else {
pcr = 0;
for(i = 0; i < 6; i++){
if(p->mem[i].size == 0)
continue;
if(p->mem[i].bar & 1)
pcr |= IOen;
else
pcr |= MEMen;
}
}
if((p->pcr & pcr) != pcr){
print("pcienable %T: pcr %ux->%ux\n", p->tbdf, p->pcr, p->pcr|pcr);
p->pcr |= pcr;
pcicfgrw32(p->tbdf, PciPCR, 0xFFFF0000|p->pcr, 0);
}
}
void
pcidisable(Pcidev *p)
{
if(p == nil)
return;
pciclrbme(p);
}