230 lines
6.8 KiB
C
230 lines
6.8 KiB
C
/* $XFree86: xc/programs/Xserver/hw/xfree86/os-support/linux/lnx_pci.c,v 3.8 2002/04/09 15:59:37 tsi Exp $ */
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#ifdef HAVE_XORG_CONFIG_H
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#include <xorg-config.h>
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#endif
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#include <stdio.h>
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#include <X11/X.h>
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#include "os.h"
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#include "xf86.h"
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#include "xf86Priv.h"
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#define XF86_OS_PRIVS
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#include "xf86_OSproc.h"
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#include "xf86Pci.h"
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#ifdef __sparc__
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#define PCIADDR_TYPE long long
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#define PCIADDR_IGNORE_FMT "%*x"
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#define PCIADDR_FMT "%llx"
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#else
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#define PCIADDR_TYPE long
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#define PCIADDR_IGNORE_FMT "%*x"
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#define PCIADDR_FMT "%lx"
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#endif
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FILE *xf86OSLinuxPCIFile = NULL;
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Bool
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xf86GetPciSizeFromOS(PCITAG tag, int index, int* bits)
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{
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char c[0x200];
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char *res;
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unsigned int bus, devfn, dev, fn;
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unsigned PCIADDR_TYPE size[7];
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unsigned int num;
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signed PCIADDR_TYPE Size;
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if (index > 7)
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return FALSE;
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if (!xf86OSLinuxPCIFile && \
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!(xf86OSLinuxPCIFile = fopen("/proc/bus/pci/devices","r")))
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return FALSE;
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do {
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res = fgets(c,0x1ff,xf86OSLinuxPCIFile);
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if (res) {
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num = sscanf(res,
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/*bus+dev vendorid deviceid irq */
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"%02x%02x\t%*04x%*04x\t%*x"
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/* 7 PCI resource base addresses */
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"\t" PCIADDR_IGNORE_FMT
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"\t" PCIADDR_IGNORE_FMT
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"\t" PCIADDR_IGNORE_FMT
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"\t" PCIADDR_IGNORE_FMT
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"\t" PCIADDR_IGNORE_FMT
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"\t" PCIADDR_IGNORE_FMT
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"\t" PCIADDR_IGNORE_FMT
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/* 7 PCI resource sizes, and then optionally a driver name */
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"\t" PCIADDR_FMT
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"\t" PCIADDR_FMT
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"\t" PCIADDR_FMT
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"\t" PCIADDR_FMT
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"\t" PCIADDR_FMT
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"\t" PCIADDR_FMT
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"\t" PCIADDR_FMT,
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&bus,&devfn,&size[0],&size[1],&size[2],&size[3],
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&size[4],&size[5],&size[6]);
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if (num != 9) { /* apparantly not 2.3 style */
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fseek(xf86OSLinuxPCIFile, 0L, SEEK_SET);
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return FALSE;
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}
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dev = devfn >> 3;
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fn = devfn & 0x7;
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if (tag == pciTag(bus,dev,fn)) {
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*bits = 0;
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if (size[index] != 0) {
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Size = size[index] - ((PCIADDR_TYPE) 1);
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while (Size & ((PCIADDR_TYPE) 0x01)) {
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Size = Size >> ((PCIADDR_TYPE) 1);
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(*bits)++;
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}
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}
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fseek(xf86OSLinuxPCIFile, 0L, SEEK_SET);
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return TRUE;
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}
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}
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} while (res);
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fseek(xf86OSLinuxPCIFile, 0L, SEEK_SET);
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return FALSE;
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}
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/* Query the kvirt address (64bit) of a BAR range from TAG */
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Bool
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xf86GetPciOffsetFromOS(PCITAG tag, int index, unsigned long* bases)
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{
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FILE *file;
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char c[0x200];
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char *res;
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unsigned int bus, devfn, dev, fn;
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unsigned PCIADDR_TYPE offset[7];
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unsigned int num;
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if (index > 7)
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return FALSE;
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if (!(file = fopen("/proc/bus/pci/devices","r")))
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return FALSE;
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do {
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res = fgets(c,0x1ff,file);
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if (res) {
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num = sscanf(res,
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/*bus+dev vendorid deviceid irq */
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"%02x%02x\t%*04x%*04x\t%*x"
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/* 7 PCI resource base addresses */
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"\t" PCIADDR_FMT
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"\t" PCIADDR_FMT
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"\t" PCIADDR_FMT
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"\t" PCIADDR_FMT
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"\t" PCIADDR_FMT
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"\t" PCIADDR_FMT
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"\t" PCIADDR_FMT
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/* 7 PCI resource sizes, and then optionally a driver name */
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"\t" PCIADDR_IGNORE_FMT
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"\t" PCIADDR_IGNORE_FMT
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"\t" PCIADDR_IGNORE_FMT
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"\t" PCIADDR_IGNORE_FMT
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"\t" PCIADDR_IGNORE_FMT
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"\t" PCIADDR_IGNORE_FMT
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"\t" PCIADDR_IGNORE_FMT,
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&bus,&devfn,&offset[0],&offset[1],&offset[2],&offset[3],
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&offset[4],&offset[5],&offset[6]);
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if (num != 9) { /* apparantly not 2.3 style */
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fclose(file);
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return FALSE;
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}
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dev = devfn >> 3;
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fn = devfn & 0x7;
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if (tag == pciTag(bus,dev,fn)) {
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/* return the offset for the index requested */
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*bases = offset[index];
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fclose(file);
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return TRUE;
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}
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}
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} while (res);
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fclose(file);
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return FALSE;
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}
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/* Query the kvirt address (64bit) of a BAR range from size for a given TAG */
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unsigned long
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xf86GetOSOffsetFromPCI(PCITAG tag, int space, unsigned long base)
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{
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FILE *file;
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char c[0x200];
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char *res;
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unsigned int bus, devfn, dev, fn;
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unsigned PCIADDR_TYPE offset[7];
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unsigned PCIADDR_TYPE size[7];
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unsigned int num;
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unsigned int ndx;
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if (!(file = fopen("/proc/bus/pci/devices","r")))
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return NULL;
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do {
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res = fgets(c,0x1ff,file);
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if (res) {
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num = sscanf(res,
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/*bus+dev vendorid deviceid irq */
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"%02x%02x\t%*04x%*04x\t%*x"
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/* 7 PCI resource base addresses */
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"\t" PCIADDR_FMT
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"\t" PCIADDR_FMT
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"\t" PCIADDR_FMT
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"\t" PCIADDR_FMT
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"\t" PCIADDR_FMT
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"\t" PCIADDR_FMT
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"\t" PCIADDR_FMT
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/* 7 PCI resource sizes, and then optionally a driver name */
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"\t" PCIADDR_FMT
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"\t" PCIADDR_FMT
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"\t" PCIADDR_FMT
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"\t" PCIADDR_FMT
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"\t" PCIADDR_FMT
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"\t" PCIADDR_FMT
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"\t" PCIADDR_FMT,
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&bus,&devfn,&offset[0],&offset[1],&offset[2],&offset[3],
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&offset[4],&offset[5],&offset[6], &size[0], &size[1], &size[2],
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&size[3], &size[4], &size[5], &size[6]);
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if (num != 16) { /* apparantly not 2.3 style */
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fclose(file);
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return NULL;
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}
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dev = devfn >> 3;
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fn = devfn & 0x7;
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if (tag == pciTag(bus,dev,fn)) {
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/* ok now look through all the BAR values of this device */
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for (ndx=0; ndx<7; ndx++) {
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unsigned long savePtr;
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/*
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* remember to lop of the last 4bits of the BAR values as they are
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* memory attributes
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*/
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if (ndx == 6)
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savePtr = (0xFFFFFFF0) &
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pciReadLong(tag, PCI_CMD_BIOS_REG);
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else /* this the ROM bar */
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savePtr = (0xFFFFFFF0) &
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pciReadLong(tag, PCI_CMD_BASE_REG + (0x4 * ndx));
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/* find the index of the incoming base */
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if (base >= savePtr && base <= (savePtr + size[ndx])) {
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fclose(file);
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return ( ~(0xFUL) & (offset[ndx] + (base - savePtr)));
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}
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}
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}
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}
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} while (res);
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fclose(file);
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return NULL;
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}
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