259 lines
7.0 KiB
C
259 lines
7.0 KiB
C
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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 <sys/types.h>
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#include <stdio.h>
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#include <dirent.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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int lnxPciInit(void);
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struct pci_dev {
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unsigned int domain;
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unsigned int bus;
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unsigned int dev;
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unsigned int fn;
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PCIADDR_TYPE offset[7];
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PCIADDR_TYPE size[7];
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struct pci_dev *next;
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};
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struct pci_dev *xf86OSLinuxPCIDevs = NULL;
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int xf86OSLinuxNumPciDevs = 0;
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static struct pci_dev *xf86OSLinuxGetPciDevs(void) {
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char c[0x200];
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FILE *file = NULL;
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DIR *dir;
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struct dirent *dirent;
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struct pci_dev *tmp, *ret = NULL;
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unsigned int i, num, devfn;
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unsigned PCIADDR_TYPE begin, end;
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char *res;
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/* Try 2.6 devices first, with domain support */
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if ( (dir = opendir ("/sys/bus/pci/devices")) ) {
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xf86OSLinuxNumPciDevs = 0;
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while ( (dirent = readdir (dir)) ) {
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unsigned int domain, bus, dev, fn;
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if (sscanf (dirent->d_name, "%04x:%02x:%02x.%01x",
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&domain, &bus, &dev, &fn) == 4) {
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tmp = xcalloc (sizeof(struct pci_dev), 1);
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tmp->domain = domain;
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tmp->bus = bus;
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tmp->dev = dev;
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tmp->fn = fn;
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sprintf (c, "/sys/bus/pci/devices/%12s/resource",
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dirent->d_name);
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i = 0;
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if ( (file = fopen (c, "r")) ) {
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while (i < 7 && fgets (c, 0x200, file)) {
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if (sscanf (c, PCIADDR_FMT " " PCIADDR_FMT " "
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PCIADDR_IGNORE_FMT, &begin, &end) == 2) {
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tmp->offset[i] = begin;
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tmp->size[i] = begin ? end-begin+1 : 0;
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i++;
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}
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}
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fclose (file);
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}
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if (i > 0) {
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tmp->next = ret;
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ret = tmp;
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xf86OSLinuxNumPciDevs++;
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} else
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xfree (tmp);
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}
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}
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closedir (dir);
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}
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if (ret)
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return ret;
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file = fopen("/proc/bus/pci/devices", "r");
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if (!file) return NULL;
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xf86OSLinuxNumPciDevs = 0;
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do {
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res = fgets(c, 0x1ff, file);
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if (res) {
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tmp = xcalloc(sizeof(struct pci_dev),1);
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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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&tmp->bus,&devfn,&tmp->offset[0],&tmp->offset[1],&tmp->offset[2],&tmp->offset[3],
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&tmp->offset[4],&tmp->offset[5],&tmp->offset[6], &tmp->size[0], &tmp->size[1], &tmp->size[2],
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&tmp->size[3], &tmp->size[4], &tmp->size[5], &tmp->size[6]);
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tmp->dev = devfn >> 3;
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tmp->fn = devfn & 0x7;
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if (num != 16) { /* apparantly not 2.3 style */
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xfree(tmp);
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fclose(file);
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return NULL;
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}
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if (ret) {
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tmp->next = ret;
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}
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ret = tmp;
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xf86OSLinuxNumPciDevs++;
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}
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} while (res);
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fclose(file);
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return ret;
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}
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/* not to be confused with linuxPciInit (i.e. ARCH_PCI_INIT), found in
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* os-support/bus/linuxPci.c. */
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int lnxPciInit(void) {
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if (!xf86OSLinuxPCIDevs)
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xf86OSLinuxPCIDevs = xf86OSLinuxGetPciDevs();
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return xf86OSLinuxNumPciDevs;
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}
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Bool
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xf86GetPciSizeFromOS(PCITAG tag, int index, int* bits)
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{
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signed PCIADDR_TYPE Size;
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struct pci_dev *device;
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if (index >= 7)
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return FALSE;
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if (!xf86OSLinuxPCIDevs) {
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xf86OSLinuxPCIDevs = xf86OSLinuxGetPciDevs();
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}
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if (!xf86OSLinuxPCIDevs)
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return FALSE;
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for (device = xf86OSLinuxPCIDevs; device; device = device->next) {
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if (tag == pciDomTag (device->domain, device->bus,
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device->dev, device->fn)) {
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if (device->size[index] != 0) {
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Size = device->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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return TRUE;
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}
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}
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return FALSE;
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}
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#if 0
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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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struct pci_dev *device;
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if (index >= 7)
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return FALSE;
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if (!xf86OSLinuxPCIDevs) {
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xf86OSLinuxPCIDevs = xf86OSLinuxGetPciDevs();
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}
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if (!xf86OSLinuxPCIDevs)
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return FALSE;
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for (device = xf86OSLinuxPCIDevs; device; device = device->next) {
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if (tag == pciDomTag (device->domain, device->bus,
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device->dev, device->fn)) {
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/* return the offset for the index requested */
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*bases = device->offset[index];
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return TRUE;
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}
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}
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return FALSE;
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}
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#endif
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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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unsigned int ndx;
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struct pci_dev *device;
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if (!xf86OSLinuxPCIDevs) {
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xf86OSLinuxPCIDevs = xf86OSLinuxGetPciDevs();
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}
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if (!xf86OSLinuxPCIDevs) {
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return FALSE;
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}
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for (device = xf86OSLinuxPCIDevs; device; device = device->next) {
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if (tag == pciDomTag (device->domain, device->bus,
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device->dev, device->fn)) {
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/* ok now look through all the BAR values of this device */
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pciConfigPtr pDev = xf86GetPciConfigFromTag(tag);
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for (ndx=0; ndx<7; ndx++) {
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unsigned long savePtr, flagMask;
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if (ndx == 6)
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savePtr = pDev->pci_baserom;
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else /* this the ROM bar */
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savePtr = (&pDev->pci_base0)[ndx];
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/* Ignore unset base addresses. The kernel may
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* have reported non-zero size and address even
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* if they are disabled (e.g. disabled ROM BAR).
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*/
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if (savePtr == 0)
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continue;
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/* Remove memory attribute bits, different for IO
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* and memory ranges. */
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flagMask = (savePtr & 0x1) ? ~0x3UL : ~0xFUL;
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savePtr &= flagMask;
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/* find the index of the incoming base */
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if (base >= savePtr && base < (savePtr + device->size[ndx])) {
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return (device->offset[ndx] & flagMask) + (base - savePtr);
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}
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}
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}
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};
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return 0;
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}
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