86 lines
1.9 KiB
C
86 lines
1.9 KiB
C
/* $XFree86: xc/programs/Xserver/hw/xfree86/os-support/linux/lnx_pci.c,v 3.9 2003/02/17 15:29:22 dawes 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;
|
|
}
|