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#ifdef HAVE_XORG_CONFIG_H
#include <xorg-config.h>
#endif
#include <sys/types.h>
#include <stdio.h>
#include <dirent.h>
#include <X11/X.h>
#include "os.h"
#include "xf86.h"
#include "xf86Priv.h"
#define XF86_OS_PRIVS
#include "xf86_OSproc.h"
#include "xf86Pci.h"
#include "Pci.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
int lnxPciInit(void);
struct pci_dev {
unsigned int domain;
unsigned int bus;
unsigned int dev;
unsigned int fn;
PCIADDR_TYPE offset[7];
PCIADDR_TYPE size[7];
struct pci_dev *next;
};
struct pci_dev *xf86OSLinuxPCIDevs = NULL;
int xf86OSLinuxNumPciDevs = 0;
static struct pci_dev *xf86OSLinuxGetPciDevs(void) {
char c[0x200];
FILE *file = NULL;
DIR *dir;
struct dirent *dirent;
struct pci_dev *tmp, *ret = NULL;
unsigned int i, num, devfn;
unsigned PCIADDR_TYPE begin, end;
char *res;
/* Try 2.6 devices first, with domain support */
if ( (dir = opendir ("/sys/bus/pci/devices")) ) {
xf86OSLinuxNumPciDevs = 0;
while ( (dirent = readdir (dir)) ) {
unsigned int domain, bus, dev, fn;
if (sscanf (dirent->d_name, "%04x:%02x:%02x.%01x",
&domain, &bus, &dev, &fn) == 4) {
tmp = xcalloc (sizeof(struct pci_dev), 1);
tmp->domain = domain;
tmp->bus = bus;
tmp->dev = dev;
tmp->fn = fn;
sprintf (c, "/sys/bus/pci/devices/%12s/resource",
dirent->d_name);
i = 0;
if ( (file = fopen (c, "r")) ) {
while (i < 7 && fgets (c, 0x200, file)) {
if (sscanf (c, PCIADDR_FMT " " PCIADDR_FMT " "
PCIADDR_IGNORE_FMT, &begin, &end) == 2) {
tmp->offset[i] = begin;
tmp->size[i] = begin ? end-begin+1 : 0;
i++;
}
}
fclose (file);
}
if (i > 0) {
tmp->next = ret;
ret = tmp;
xf86OSLinuxNumPciDevs++;
} else
xfree (tmp);
}
}
closedir (dir);
}
if (ret)
return ret;
file = fopen("/proc/bus/pci/devices", "r");
if (!file) return NULL;
xf86OSLinuxNumPciDevs = 0;
do {
res = fgets(c, 0x1ff, file);
if (res) {
tmp = xcalloc(sizeof(struct pci_dev),1);
num = sscanf(res,
/*bus+dev vendorid deviceid irq */
"%02x%02x\t%*04x%*04x\t%*x"
/* 7 PCI resource base addresses */
"\t" PCIADDR_FMT
"\t" PCIADDR_FMT
"\t" PCIADDR_FMT
"\t" PCIADDR_FMT
"\t" PCIADDR_FMT
"\t" PCIADDR_FMT
"\t" PCIADDR_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,
&tmp->bus,&devfn,&tmp->offset[0],&tmp->offset[1],&tmp->offset[2],&tmp->offset[3],
&tmp->offset[4],&tmp->offset[5],&tmp->offset[6], &tmp->size[0], &tmp->size[1], &tmp->size[2],
&tmp->size[3], &tmp->size[4], &tmp->size[5], &tmp->size[6]);
tmp->dev = devfn >> 3;
tmp->fn = devfn & 0x7;
if (num != 16) { /* apparantly not 2.3 style */
xfree(tmp);
fclose(file);
return NULL;
}
if (ret) {
tmp->next = ret;
}
ret = tmp;
xf86OSLinuxNumPciDevs++;
}
} while (res);
fclose(file);
return ret;
}
/* not to be confused with linuxPciInit (i.e. ARCH_PCI_INIT), found in
* os-support/bus/linuxPci.c. */
int lnxPciInit(void) {
if (!xf86OSLinuxPCIDevs)
xf86OSLinuxPCIDevs = xf86OSLinuxGetPciDevs();
return xf86OSLinuxNumPciDevs;
}
/* Query the kvirt address (64bit) of a BAR range from size for a given TAG */
unsigned long
xf86GetOSOffsetFromPCI(PCITAG tag, int space, unsigned long base)
{
unsigned int ndx;
struct pci_dev *device;
struct pci_device *dev;
if (!xf86OSLinuxPCIDevs) {
xf86OSLinuxPCIDevs = xf86OSLinuxGetPciDevs();
}
if (!xf86OSLinuxPCIDevs) {
return FALSE;
}
for (device = xf86OSLinuxPCIDevs; device; device = device->next) {
dev = pci_device_find_by_slot(device->domain, device->bus,
device->dev, device->fn);
if (dev != NULL) {
/* ok now look through all the BAR values of this device */
for (ndx=0; ndx<7; ndx++) {
uint32_t savePtr;
uint32_t flagMask;
/* The ROM BAR isn't with the other BARs.
*/
const pciaddr_t offset = (ndx == 6)
? (4 * 12) : (4 * ndx) + 16;
pci_device_cfg_read_u32(dev, &savePtr, offset);
/* Ignore unset base addresses. The kernel may have reported
* non-zero size and address even if they are disabled (e.g.,
* disabled ROM BAR).
*/
if (savePtr == 0)
continue;
/* Remove memory attribute bits, different for IO
* and memory ranges.
*/
flagMask = (savePtr & 0x1) ? ~0x3UL : ~0xFUL;
savePtr &= flagMask;
/* find the index of the incoming base */
if (base >= savePtr && base < (savePtr + device->size[ndx])) {
return (device->offset[ndx] & flagMask) + (base - savePtr);
}
}
}
}
return 0;
}
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