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#include <ctype.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/stat.h>
#include <pci/pci.h>
#include "pciprobe.h"
struct pciDevice * pciDeviceList = NULL;
static int numPciDevices = 0;
static struct pci_access *pacc=NULL;
static int devCmp(const void * a, const void * b) {
const struct pciDevice * one = a;
const struct pciDevice * two = b;
int x=0,y=0;
x = (one->vendor - two->vendor);
y = (one->device - two->device);
if (x)
return x;
else
return y;
}
static int vendCmp(const void * a, const void * b) {
const struct pciDevice * one = a;
const struct pciDevice * two = b;
return (one->vendor - two->vendor);
}
char *getVendor(unsigned int vendor) {
struct pciDevice *searchDev, key;
char *tmpstr;
key.vendor = vendor;
searchDev = bsearch(&key,pciDeviceList,numPciDevices,
sizeof(struct pciDevice), vendCmp);
if (searchDev) {
int x;
x=strchr(searchDev->desc,'|')-searchDev->desc-1;
tmpstr=calloc(x,sizeof(char));
tmpstr=strncpy(tmpstr,searchDev->desc,x);
return tmpstr;
} else {
return NULL;
}
}
void probePciFreeDrivers(void) {
int i;
if (!pciDeviceList) return;
for (i = 0; i < numPciDevices; i++) {
free(pciDeviceList[i].driver);
free(pciDeviceList[i].desc);
}
free(pciDeviceList);
pciDeviceList = NULL;
numPciDevices = 0;
}
int probePciReadDrivers(const char * fn) {
int fd;
struct stat sb;
char * buf;
int numDrivers;
char * start, * chptr;
struct pciDevice * nextDevice;
char module[5000];
char descrip[5000];
fd = open(fn, O_RDONLY);
if (fd < 0) return -1;
fstat(fd, &sb);
buf = alloca(sb.st_size + 1);
read(fd, buf, sb.st_size);
buf[sb.st_size] = '\0';
close(fd);
/* upper bound */
numDrivers = 1;
start = buf;
while ((start = strchr(start, '\n'))) {
numDrivers++;
start++;
}
pciDeviceList = realloc(pciDeviceList, sizeof(*pciDeviceList) *
(numPciDevices + numDrivers));
nextDevice = pciDeviceList + numPciDevices;
start = buf;
while (start && *start) {
while (isspace(*start)) start++;
if (*start != '#' && *start != '\n') {
if (sscanf(start, "%x %x %s \"%[^\"]", &nextDevice->vendor,
&nextDevice->device, module, descrip ) == 4) {
numPciDevices++;
chptr = strchr(module, '.');
if (chptr) *chptr = '\0';
nextDevice->driver = strdup(module);
nextDevice->desc = strdup(descrip);
nextDevice++;
}
}
start = strchr(start, '\n');
if (start) start++;
}
qsort(pciDeviceList, numPciDevices, sizeof(*pciDeviceList), devCmp);
return 0;
}
struct pciDevice * pciGetDeviceInfo(unsigned int vend, unsigned int dev) {
struct pciDevice *searchDev, key;
key.vendor = vend;
key.device = dev;
searchDev = bsearch(&key,pciDeviceList,numPciDevices,
sizeof(struct pciDevice), devCmp);
if (!searchDev) {
char *namebuf;
searchDev = malloc(sizeof(struct pciDevice));
searchDev->vendor = vend;
searchDev->device = dev;
searchDev->driver = strdup("unknown");
searchDev->desc = calloc(128, sizeof(char));
namebuf = getVendor(vend);
if (!namebuf) {
snprintf(searchDev->desc,128,
"Unknown vendor unknown device %04x:%04x",
searchDev->vendor, searchDev->device);
} else {
snprintf(searchDev->desc,128,
"%s unknown device %04x:%04x",
namebuf, searchDev->vendor, searchDev->device);
}
}
return searchDev;
}
struct pciDevice ** probePci(unsigned int type, int all) {
struct pciDevice **devices=NULL;
struct pci_dev *p;
int numDevices=0;
pacc = pci_alloc();
if (!pacc) return NULL;
pci_init(pacc);
pci_scan_bus(pacc);
for (p = pacc->devices; p; p=p->next) {
byte config[256];
int x=64;
struct pciDevice *dev;
memset(config,256,0);
pci_read_block(p, 0, config, x);
if (x<128 && (config[PCI_HEADER_TYPE] & 0x7f) == PCI_HEADER_TYPE_CARDBUS) {
pci_read_block(p, 0, config+64, 64);
x=128;
}
dev = pciGetDeviceInfo(p->vendor_id,p->device_id);
dev->type = config[PCI_CLASS_DEVICE+1] << 8 | config[PCI_CLASS_DEVICE];
if (all || (strcmp(dev->driver,"unknown") && strcmp(dev->driver,"ignore"))) {
if (!type || (type<0xff && (type==dev->type>>8))
|| (type==dev->type)) {
if (!numDevices) {
devices = malloc(sizeof(struct pciDevice *));
} else {
devices = realloc(devices,(numDevices+1)*sizeof(struct pciDevice *));
}
devices[numDevices] = dev;
numDevices++;
}
}
}
pci_cleanup(pacc);
if (devices) {
devices = realloc(devices,(numDevices+1)*sizeof(struct pciDevice *));
devices[numDevices] = NULL;
}
return devices;
}
#ifdef TESTING
int main(int argc, char **argv) {
struct pciDevice **list,*dev;
int x=0;
if (probePciReadDrivers("pcitable")) {
perror("error reading pci table");
exit(0);
}
list = probePci(0,1);
if (list)
while ((dev=list[x])) {
printf("%04x %04x %s (%s)\n",dev->vendor,dev->device,
dev->desc, dev->driver);
x++;
}
exit(0);
}
#endif
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