ref: faa625a1d5ab47ac0438b2cea5b2bde1ea747b8b
dir: /sys/src/9/bcm64/pcibcm.c/
#include "u.h"
#include "../port/lib.h"
#include "mem.h"
#include "dat.h"
#include "fns.h"
#include "io.h"
#include "../port/pci.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 Pcidev* pciroot;
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;
}
int
pcicfgrw32(int tbdf, int rno, int data, int read)
{
u32int *p;
if((p = cfgaddr(tbdf, rno & ~3)) != nil){
if(read)
data = *p;
else
*p = data;
} else {
data = -1;
}
return data;
}
int
pcicfgrw16(int tbdf, int rno, int data, int read)
{
u16int *p;
if((p = cfgaddr(tbdf, rno & ~1)) != nil){
if(read)
data = *p;
else
*p = data;
} else {
data = -1;
}
return data;
}
int
pcicfgrw8(int tbdf, int rno, int data, int read)
{
u8int *p;
if((p = cfgaddr(tbdf, rno)) != nil){
if(read)
data = *p;
else
*p = data;
} else {
data = -1;
}
return data;
}
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)
{
ulong dat;
Pcidev *p;
Pciisr *isr;
if((p = pcimatchtbdf(tbdf)) == nil){
print("pciintrenable: %T: unknown device\n", tbdf);
return;
}
if(pcimsidisable(p) < 0){
print("pciintrenable: %T: device doesnt support msi\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;
}
dat = regs[MISC_MSI_DATA_CONFIG];
dat = ((dat >> 16) & (dat & 0xFFFF)) | (isr-pciisr);
pcimsienable(p, MSI_TARGET_ADDR, dat);
}
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;
}
static void
pcicfginit(void)
{
uvlong base, limit;
ulong ioa;
fmtinstall('T', tbdffmt);
pciscan(0, &pciroot, nil);
if(pciroot == nil)
return;
/*
* Work out how big the top bus is
*/
ioa = 0;
base = soc.pciwin;
pcibusmap(pciroot, &base, &ioa, 0);
limit = base-1;
/*
* Align the windows and map it
*/
base = soc.pciwin;
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;
ioa = 0;
base = soc.pciwin;
pcibusmap(pciroot, &base, &ioa, 1);
pcihinv(pciroot);
}
void
pcibcmlink(void)
{
int log2dmasize = 30; // 1GB
char *s;
if((s = getconf("*pciwin")) != nil){
print("*pciwin: %s\n", s);
soc.pciwin = (uintptr)strtoll(s, nil, 16);
}
if((s = getconf("*pcidmawin")) != nil){
print("*pcidmawin: %s\n", s);
soc.pcidmawin = (uintptr)strtoll(s, nil, 16);
}
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] = ((u32int)soc.pcidmawin & ~0x1F) | (log2dmasize-15);
regs[MISC_RC_BAR2_CONFIG_HI] = soc.pcidmawin >> 32;
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();
}