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/* $XFree86: xc/programs/Xserver/hw/xfree86/os-support/linux/lnx_pci.c,v 3.8 2002/04/09 15:59:37 tsi Exp $ */
#include <stdio.h>
#include "X.h"
#include "os.h"
#include "xf86.h"
#include "xf86Priv.h"
#define XF86_OS_PRIVS
#include "xf86_OSproc.h"
#include "xf86Pci.h"
#ifdef __sparc__
#define PCIADDR_TYPE long long
#define PCIADDR_IGNORE_FMT "%*x"
#define PCIADDR_FMT "%llx"
#else
#define PCIADDR_TYPE long
#define PCIADDR_IGNORE_FMT "%*x"
#define PCIADDR_FMT "%lx"
#endif
Bool
xf86GetPciSizeFromOS(PCITAG tag, int index, int* bits)
{
FILE *file;
char c[0x200];
char *res;
unsigned int bus, devfn, dev, fn;
unsigned PCIADDR_TYPE size[7];
unsigned int num;
signed PCIADDR_TYPE Size;
if (index > 7)
return FALSE;
if (!(file = fopen("/proc/bus/pci/devices","r")))
return FALSE;
do {
res = fgets(c,0x1ff,file);
if (res) {
num = sscanf(res,
/*bus+dev vendorid deviceid irq */
"%02x%02x\t%*04x%*04x\t%*x"
/* 7 PCI resource base addresses */
"\t" PCIADDR_IGNORE_FMT
"\t" PCIADDR_IGNORE_FMT
"\t" PCIADDR_IGNORE_FMT
"\t" PCIADDR_IGNORE_FMT
"\t" PCIADDR_IGNORE_FMT
"\t" PCIADDR_IGNORE_FMT
"\t" PCIADDR_IGNORE_FMT
/* 7 PCI resource sizes, and then optionally a driver name */
"\t" PCIADDR_FMT
"\t" PCIADDR_FMT
"\t" PCIADDR_FMT
"\t" PCIADDR_FMT
"\t" PCIADDR_FMT
"\t" PCIADDR_FMT
"\t" PCIADDR_FMT,
&bus,&devfn,&size[0],&size[1],&size[2],&size[3],
&size[4],&size[5],&size[6]);
if (num != 9) { /* apparantly not 2.3 style */
fclose(file);
return FALSE;
}
dev = devfn >> 3;
fn = devfn & 0x7;
if (tag == pciTag(bus,dev,fn)) {
*bits = 0;
if (size[index] != 0) {
Size = size[index] - ((PCIADDR_TYPE) 1);
while (Size & ((PCIADDR_TYPE) 0x01)) {
Size = Size >> ((PCIADDR_TYPE) 1);
(*bits)++;
}
}
fclose(file);
return TRUE;
}
}
} while (res);
fclose(file);
return FALSE;
}
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