ref: a898d31f76b7424aeb65b07350cec3539620d50e
dir: /sys/src/9/bcm64/pci.c/
#include "u.h"
#include "../port/lib.h"
#include "mem.h"
#include "dat.h"
#include "fns.h"
#include "io.h"
/* bcmstb PCIe controller registers */
enum{
RC_CFG_VENDOR_VENDOR_SPECIFIC_REG1 = 0x0188/4,
RC_CFG_PRIV1_ID_VAL3 = 0x043c/4,
RC_DL_MDIO_ADDR = 0x1100/4,
RC_DL_MDIO_WR_DATA = 0x1104/4,
RC_DL_MDIO_RD_DATA = 0x1108/4,
MISC_MISC_CTRL = 0x4008/4,
MISC_CPU_2_PCIE_MEM_WIN0_LO = 0x400c/4,
MISC_CPU_2_PCIE_MEM_WIN0_HI = 0x4010/4,
MISC_RC_BAR1_CONFIG_LO = 0x402c/4,
MISC_RC_BAR2_CONFIG_LO = 0x4034/4,
MISC_RC_BAR2_CONFIG_HI = 0x4038/4,
MISC_RC_BAR3_CONFIG_LO = 0x403c/4,
MISC_MSI_BAR_CONFIG_LO = 0x4044/4,
MISC_MSI_BAR_CONFIG_HI = 0x4048/4,
MISC_MSI_DATA_CONFIG = 0x404c/4,
MISC_EOI_CTRL = 0x4060/4,
MISC_PCIE_CTRL = 0x4064/4,
MISC_PCIE_STATUS = 0x4068/4,
MISC_REVISION = 0x406c/4,
MISC_CPU_2_PCIE_MEM_WIN0_BASE_LIMIT = 0x4070/4,
MISC_CPU_2_PCIE_MEM_WIN0_BASE_HI = 0x4080/4,
MISC_CPU_2_PCIE_MEM_WIN0_LIMIT_HI = 0x4084/4,
MISC_HARD_PCIE_HARD_DEBUG = 0x4204/4,
INTR2_CPU_BASE = 0x4300/4,
MSI_INTR2_BASE = 0x4500/4,
INTR_STATUS = 0,
INTR_SET,
INTR_CLR,
INTR_MASK_STATUS,
INTR_MASK_SET,
INTR_MASK_CLR,
EXT_CFG_INDEX = 0x9000/4,
RGR1_SW_INIT_1 = 0x9210/4,
EXT_CFG_DATA = 0x8000/4,
};
#define MSI_TARGET_ADDR 0xFFFFFFFFCULL
static u32int *regs = (u32int*)(VIRTIO1 + 0x500000);
static Lock pcicfglock;
static int pcimaxbno = 0;
static int pcimaxdno = 0;
static Pcidev* pciroot;
static Pcidev* pcilist;
static Pcidev* pcitail;
typedef struct Pcisiz Pcisiz;
struct Pcisiz
{
Pcidev* dev;
int siz;
int bar;
};
enum
{
MaxFNO = 7,
MaxUBN = 255,
};
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;
}
static void pcicfginit(void);
static void*
cfgaddr(int tbdf, int rno)
{
if(BUSBNO(tbdf) == 0 && BUSDNO(tbdf) == 0)
return (uchar*)regs + rno;
regs[EXT_CFG_INDEX] = BUSBNO(tbdf) << 20 | BUSDNO(tbdf) << 15 | BUSFNO(tbdf) << 12;
coherence();
return ((uchar*)®s[EXT_CFG_DATA]) + rno;
}
static int
pcicfgrw32(int tbdf, int rno, int data, int read)
{
int x = -1;
u32int *p;
ilock(&pcicfglock);
if((p = cfgaddr(tbdf, rno & ~3)) != nil){
if(read)
x = *p;
else
*p = data;
}
iunlock(&pcicfglock);
return x;
}
static int
pcicfgrw16(int tbdf, int rno, int data, int read)
{
int x = -1;
u16int *p;
ilock(&pcicfglock);
if((p = cfgaddr(tbdf, rno & ~1)) != nil){
if(read)
x = *p;
else
*p = data;
}
iunlock(&pcicfglock);
return x;
}
static int
pcicfgrw8(int tbdf, int rno, int data, int read)
{
int x = -1;
u8int *p;
ilock(&pcicfglock);
if((p = cfgaddr(tbdf, rno)) != nil){
if(read)
x = *p;
else
*p = data;
}
iunlock(&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);
}
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);
}
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);
}
Pcidev*
pcimatch(Pcidev* prev, int vid, int did)
{
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;
for(pcidev = pcilist; pcidev != nil; pcidev = pcidev->list) {
if(pcidev->tbdf == tbdf)
break;
}
return pcidev;
}
static u32int
pcibarsize(Pcidev *p, int rno)
{
u32int 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, uintptr *pmema, uintptr *pioa, int wrreg)
{
Pcidev *p;
int ntb, i, size, rno, hole;
uintptr v, mema, ioa, sioa, smema, base, limit;
Pcisiz *table, *tptr, *mtb, *itb;
ioa = *pioa;
mema = *pmema;
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)
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){
rno = PciBAR0+(tptr->bar*4);
if((mema >> 32) != 0){
pcicfgrw32(p->tbdf, rno, mema|4, 0);
pcicfgrw32(p->tbdf, rno+4, mema >> 32, 0);
} else {
pcicfgrw32(p->tbdf, rno, 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) {
if(p->cls == 0){
p->cls = 64;
pcicfgw8(p, PciCLS, p->cls);
}
pcicfgrw8(p->tbdf, PciLTR, 64, 0);
p->pcr |= MASen;
pcicfgrw16(p->tbdf, PciPCR, p->pcr, 0);
continue;
}
if(p == pciroot){
base = p->mema.bar;
limit = base+p->mema.size-1;
regs[MISC_CPU_2_PCIE_MEM_WIN0_LO] = base;
regs[MISC_CPU_2_PCIE_MEM_WIN0_HI] = base >> 32;
base >>= 20, limit >>= 20;
regs[MISC_CPU_2_PCIE_MEM_WIN0_BASE_LIMIT] = (base & 0xFFF) << 4 | (limit & 0xFFF) << 20;
regs[MISC_CPU_2_PCIE_MEM_WIN0_BASE_HI] = base >> 12;
regs[MISC_CPU_2_PCIE_MEM_WIN0_LIMIT_HI] = limit >> 12;
}
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: no 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){
rno += 4;
p->mem[i].bar |= (uintptr)pcicfgr32(p, rno) << 32;
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) {
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;
}
static void
pcicfginit(void)
{
uintptr mema, ioa;
fmtinstall('T', tbdffmt);
pcilscan(0, &pciroot, nil);
/*
* Work out how big the top bus is
*/
ioa = 0;
mema = 0;
pcibusmap(pciroot, &mema, &ioa, 0);
/*
* Align the windows and map it
*/
ioa = 0;
mema = soc.pciwin;
pcibusmap(pciroot, &mema, &ioa, 1);
}
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:%llux %d ", i,
(uvlong)t->mem[i].bar, t->mem[i].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;
}
}
static void
pcihinv(Pcidev* p)
{
pcilhinv(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
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;
}
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;
}
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);
}
enum {
MSICtrl = 0x02, /* message control register (16 bit) */
MSIAddr = 0x04, /* message address register (64 bit) */
MSIData32 = 0x08, /* message data register for 32 bit MSI (16 bit) */
MSIData64 = 0x0C, /* message data register for 64 bit MSI (16 bit) */
};
typedef struct Pciisr Pciisr;
struct Pciisr {
void (*f)(Ureg*, void*);
void *a;
Pcidev *p;
};
static Pciisr pciisr[32];
static Lock pciisrlk;
void
pciintrenable(int tbdf, void (*f)(Ureg*, void*), void *a)
{
int cap, ok64;
u32int dat;
u64int adr;
Pcidev *p;
Pciisr *isr;
if((p = pcimatchtbdf(tbdf)) == nil){
print("pciintrenable: %T: unknown device\n", tbdf);
return;
}
if((cap = pcicap(p, PciCapMSI)) < 0){
print("pciintrenable: %T: no MSI cap\n", tbdf);
return;
}
lock(&pciisrlk);
for(isr = pciisr; isr < &pciisr[nelem(pciisr)]; isr++){
if(isr->p == p){
isr->p = nil;
regs[MSI_INTR2_BASE + INTR_MASK_SET] = 1 << (isr-pciisr);
break;
}
}
for(isr = pciisr; isr < &pciisr[nelem(pciisr)]; isr++){
if(isr->p == nil){
isr->p = p;
isr->a = a;
isr->f = f;
regs[MSI_INTR2_BASE + INTR_CLR] = 1 << (isr-pciisr);
regs[MSI_INTR2_BASE + INTR_MASK_CLR] = 1 << (isr-pciisr);
break;
}
}
unlock(&pciisrlk);
if(isr >= &pciisr[nelem(pciisr)]){
print("pciintrenable: %T: out of isr slots\n", tbdf);
return;
}
adr = MSI_TARGET_ADDR;
ok64 = (pcicfgr16(p, cap + MSICtrl) & (1<<7)) != 0;
pcicfgw32(p, cap + MSIAddr, adr);
if(ok64) pcicfgw32(p, cap + MSIAddr + 4, adr>>32);
dat = regs[MISC_MSI_DATA_CONFIG];
dat = ((dat >> 16) & (dat & 0xFFFF)) | (isr-pciisr);
pcicfgw16(p, cap + (ok64 ? MSIData64 : MSIData32), dat);
pcicfgw16(p, cap + MSICtrl, 1);
}
void
pciintrdisable(int tbdf, void (*f)(Ureg*, void*), void *a)
{
Pciisr *isr;
lock(&pciisrlk);
for(isr = pciisr; isr < &pciisr[nelem(pciisr)]; isr++){
if(isr->p != nil && isr->p->tbdf == tbdf && isr->f == f && isr->a == a){
regs[MSI_INTR2_BASE + INTR_MASK_SET] = 1 << (isr-pciisr);
isr->p = nil;
isr->f = nil;
isr->a = nil;
break;
}
}
unlock(&pciisrlk);
}
static void
pciinterrupt(Ureg *ureg, void*)
{
Pciisr *isr;
u32int sts;
sts = regs[MSI_INTR2_BASE + INTR_STATUS];
if(sts == 0)
return;
regs[MSI_INTR2_BASE + INTR_CLR] = sts;
for(isr = pciisr; sts != 0 && isr < &pciisr[nelem(pciisr)]; isr++, sts>>=1){
if((sts & 1) != 0 && isr->f != nil)
(*isr->f)(ureg, isr->a);
}
regs[MISC_EOI_CTRL] = 1;
}
void
pcilink(void)
{
int log2dmasize = 30; // 1GB
regs[RGR1_SW_INIT_1] |= 3;
delay(200);
regs[RGR1_SW_INIT_1] &= ~2;
regs[MISC_PCIE_CTRL] &= ~5;
delay(200);
regs[MISC_HARD_PCIE_HARD_DEBUG] &= ~0x08000000;
delay(200);
regs[MSI_INTR2_BASE + INTR_CLR] = -1;
regs[MSI_INTR2_BASE + INTR_MASK_SET] = -1;
regs[MISC_CPU_2_PCIE_MEM_WIN0_LO] = 0;
regs[MISC_CPU_2_PCIE_MEM_WIN0_HI] = 0;
regs[MISC_CPU_2_PCIE_MEM_WIN0_BASE_LIMIT] = 0;
regs[MISC_CPU_2_PCIE_MEM_WIN0_BASE_HI] = 0;
regs[MISC_CPU_2_PCIE_MEM_WIN0_LIMIT_HI] = 0;
// SCB_ACCESS_EN, CFG_READ_UR_MODE, MAX_BURST_SIZE_128, SCB0SIZE
regs[MISC_MISC_CTRL] = 1<<12 | 1<<13 | 0<<20 | (log2dmasize-15)<<27;
regs[MISC_RC_BAR2_CONFIG_LO] = (log2dmasize-15);
regs[MISC_RC_BAR2_CONFIG_HI] = 0;
regs[MISC_RC_BAR1_CONFIG_LO] = 0;
regs[MISC_RC_BAR3_CONFIG_LO] = 0;
regs[MISC_MSI_BAR_CONFIG_LO] = MSI_TARGET_ADDR | 1;
regs[MISC_MSI_BAR_CONFIG_HI] = MSI_TARGET_ADDR>>32;
regs[MISC_MSI_DATA_CONFIG] = 0xFFF86540;
intrenable(IRQpci, pciinterrupt, nil, BUSUNKNOWN, "pci");
// force to GEN2
regs[(0xAC + 12)/4] = (regs[(0xAC + 12)/4] & ~15) | 2; // linkcap
regs[(0xAC + 48)/4] = (regs[(0xAC + 48)/4] & ~15) | 2; // linkctl2
regs[RGR1_SW_INIT_1] &= ~1;
delay(500);
if((regs[MISC_PCIE_STATUS] & 0x30) != 0x30){
print("pcireset: phy link is down\n");
return;
}
regs[RC_CFG_PRIV1_ID_VAL3] = 0x060400;
regs[RC_CFG_VENDOR_VENDOR_SPECIFIC_REG1] &= ~0xC;
regs[MISC_HARD_PCIE_HARD_DEBUG] |= 2;
pcicfginit();
pcihinv(nil);
}