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#include <u.h>
#include <libc.h>
#include <bio.h>
#include <fcall.h>
#include "pci.h"
#include "vga.h"
static Pcidev* pcilist;
static Pcidev* pcitail;
static void
pcicfginit(void)
{
int fd, i, j, n, bno, dno, fno;
char buf[1024], *base, *s;
Pcidev *p;
Dir *d;
trace("pcicfginit\n");
if((fd = open(base = "/dev/pci", OREAD)) < 0)
if((fd = open(base = "#$/pci", OREAD)) < 0)
return;
n = dirreadall(fd, &d);
close(fd);
for(i=0; i<n; i++) {
if(strstr(d[i].name, "ctl") == nil)
continue;
strncpy(buf, d[i].name, sizeof(buf));
bno = strtoul(buf, &s, 10);
dno = strtoul(s+1, &s, 10);
fno = strtoul(s+1, nil, 10);
p = mallocz(sizeof(*p), 1);
p->tbdf = MKBUS(BusPCI, bno, dno, fno);
sprint(buf, "%s/%d.%d.%draw", base, bno, dno, fno);
if((p->rawfd = open(buf, ORDWR)) < 0){
free(p);
continue;
}
sprint(buf, "%s/%d.%d.%dctl", base, bno, dno, fno);
if((fd = open(buf, OREAD)) < 0){
close(p->rawfd);
free(p);
continue;
}
if((j = read(fd, buf, sizeof(buf)-1)) <= 0){
close(p->rawfd);
close(fd);
free(p);
continue;
}
buf[j] = 0;
close(fd);
p->ccrb = strtol(buf, nil, 16);
p->ccru = strtol(buf + 3, nil, 16);
p->vid = strtol(buf + 9, &s, 16);
p->did = strtol(s + 1, &s, 16);
p->intl = strtol(s + 1, &s, 10);
p->rid = pcicfgr8(p, PciRID);
trace("%d.%d.%d: did=%X vid=%X rid=%X intl=%d ccru=%X\n",
bno, dno, fno, p->did, p->vid, p->rid, p->intl, p->ccru);
while(*s == ' '){
j = strtol(s+1, &s, 10);
if(j < 0 || j >= nelem(p->mem))
break;
p->mem[j].bar = strtoul(s+1, &s, 16);
p->mem[j].size = strtoul(s+1, &s, 10);
trace("\tmem[%d] = %lux %d\n", j, p->mem[j].bar, p->mem[j].size);
}
if(pcilist != nil)
pcitail->list = p;
else
pcilist = p;
pcitail = p;
}
}
static int
pcicfgrw(Pcidev *pcidev, int rno, int data, int len, int read)
{
uchar buf[4];
if(read){
memset(buf, 0, sizeof(buf));
if(pread(pcidev->rawfd, buf, len, rno) != len)
return -1;
switch(len){
case 1:
return GBIT8(buf);
case 2:
return GBIT16(buf);
case 4:
return GBIT32(buf);
default:
abort();
}
} else {
switch(len){
case 1:
PBIT8(buf, data);
break;
case 2:
PBIT16(buf, data);
break;
case 4:
PBIT32(buf, data);
break;
default:
abort();
}
if(pwrite(pcidev->rawfd, buf, len, rno) != len)
return -1;
}
return 0;
}
int
pcicfgr8(Pcidev* pcidev, int rno)
{
return pcicfgrw(pcidev, rno, 0, 1, 1);
}
void
pcicfgw8(Pcidev* pcidev, int rno, int data)
{
pcicfgrw(pcidev, rno, data, 1, 0);
}
int
pcicfgr16(Pcidev* pcidev, int rno)
{
return pcicfgrw(pcidev, rno, 0, 2, 1);
}
void
pcicfgw16(Pcidev* pcidev, int rno, int data)
{
pcicfgrw(pcidev, rno, data, 2, 0);
}
int
pcicfgr32(Pcidev* pcidev, int rno)
{
return pcicfgrw(pcidev, rno, 0, 4, 1);
}
void
pcicfgw32(Pcidev* pcidev, int rno, int data)
{
pcicfgrw(pcidev, rno, data, 4, 0);
}
Pcidev*
pcimatch(Pcidev* prev, int vid, int did)
{
if(pcilist == nil)
pcicfginit();
if(prev == nil)
prev = pcilist;
else
prev = prev->list;
while(prev != nil) {
if(prev->vid == vid && (did == 0 || prev->did == did))
break;
prev = prev->list;
}
return prev;
}
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