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/*
* pcimodules: Load all kernel modules for PCI device currently
* plugged into any PCI slot.
*
* Copyright 2000 Yggdrasil Computing, Incorporated
* This file may be copied under the terms and conditions of version
* two of the GNU General Public License, as published by the Free
* Software Foundation (Cambridge, Massachusetts, USA).
*
* This file is based on pciutils/lib/example.c, which has the following
* authorship and copyright statement:
*
* Written by Martin Mares and put to public domain. You can do
* with it anything you want, but I don't give you any warranty.
*/
#include <stdlib.h>
#include <stdio.h>
#include <malloc.h>
#include <string.h>
#include <unistd.h>
#include <sys/utsname.h>
#include <sys/param.h>
#include <sys/types.h>
#define _GNU_SOURCE
#include <getopt.h>
#include "pciutils.h"
const char program_name[] = "pcimodules";
#define MODDIR "/lib/modules"
#define PCIMAP "modules.pcimap"
#define LINELENGTH 8000
#define DEVICE_ANY 0xffffffff
#define VENDOR_ANY 0xffffffff
#include "lib/pci.h"
struct pcimap_entry {
unsigned int vendor, subsys_vendor, dev, subsys_dev, class, class_mask;
char *module;
struct pcimap_entry *next;
};
static struct pcimap_entry *pcimap_list = NULL;
#define OPT_STRING "h"
static struct option long_options[] = {
{"class", required_argument, NULL, 'c'},
{"classmask", required_argument, NULL, 'm'},
{"help", no_argument, NULL, 'h'},
{ 0, 0, 0, 0}
};
static unsigned long desired_class;
static unsigned long desired_classmask; /* Default is 0: accept all classes.*/
void
read_pcimap(void)
{
struct utsname utsname;
char filename[MAXPATHLEN];
FILE *pcimap_file;
char line[LINELENGTH];
struct pcimap_entry *entry;
unsigned int driver_data;
char *prevmodule = "";
char module[LINELENGTH];
if (uname(&utsname) < 0) {
perror("uname");
exit(1);
}
sprintf(filename, "%s/%s/%s", MODDIR, utsname.release, PCIMAP);
if ((pcimap_file = fopen(filename, "r")) == NULL) {
perror(filename);
exit(1);
}
while(fgets(line, LINELENGTH, pcimap_file) != NULL) {
if (line[0] == '#')
continue;
entry = xmalloc(sizeof(struct pcimap_entry));
if (sscanf(line, "%s 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x",
module,
&entry->vendor, &entry->dev,
&entry->subsys_vendor, &entry->subsys_dev,
&entry->class, &entry->class_mask,
&driver_data) != 8) {
fprintf (stderr,
"modules.pcimap unparsable line: %s.\n", line);
free(entry);
continue;
}
/* Optimize memory allocation a bit, in case someday we
have Linux systems with ~100,000 modules. It also
allows us to just compare pointers to avoid trying
to load a module twice. */
if (strcmp(module, prevmodule) != 0) {
prevmodule = xmalloc(strlen(module)+1);
strcpy(prevmodule, module);
}
entry->module = prevmodule;
entry->next = pcimap_list;
pcimap_list = entry;
}
fclose(pcimap_file);
}
/* Return a filled in pci_access->dev tree, with the device classes
stored in dev->aux.
*/
static void
match_pci_modules(void)
{
struct pci_access *pacc;
struct pci_dev *dev;
unsigned int class, subsys_dev, subsys_vendor;
struct pcimap_entry *map;
const char *prevmodule = "";
pacc = pci_alloc(); /* Get the pci_access structure */
/* Set all options you want -- here we stick with the defaults */
pci_init(pacc); /* Initialize the PCI library */
pci_scan_bus(pacc); /* We want to get the list of devices */
for(dev=pacc->devices; dev; dev=dev->next) {
pci_fill_info(dev, PCI_FILL_IDENT | PCI_FILL_BASES);
class = (pci_read_word(dev, PCI_CLASS_DEVICE) << 8)
| pci_read_byte(dev, PCI_CLASS_PROG);
subsys_dev = pci_read_word(dev, PCI_SUBSYSTEM_ID);
subsys_vendor = pci_read_word(dev,PCI_SUBSYSTEM_VENDOR_ID);
for(map = pcimap_list; map != NULL; map = map->next) {
if (((map->class ^ class) & map->class_mask) == 0 &&
((desired_class ^ class) & desired_classmask)==0 &&
(map->dev == DEVICE_ANY ||
map->dev == dev->device_id) &&
(map->vendor == VENDOR_ANY ||
map->vendor == dev->vendor_id) &&
(map->subsys_dev == DEVICE_ANY ||
map->subsys_dev == subsys_dev) &&
(map->subsys_vendor == VENDOR_ANY ||
map->subsys_vendor == subsys_vendor) &&
prevmodule != map->module) {
printf("%s\n", map->module);
prevmodule = map->module;
}
}
}
pci_cleanup(pacc);
}
int
main (int argc, char **argv)
{
int opt_index = 0;
int opt;
while ((opt = getopt_long(argc, argv, OPT_STRING, long_options,
&opt_index)) != -1) {
switch(opt) {
case 'c':
desired_class = strtol(optarg, NULL, 0);
break;
case 'm':
desired_classmask = strtol(optarg, NULL, 0);
break;
case 'h':
printf ("Usage: pcimodules [--help]\n"
" Lists kernel modules corresponding to PCI devices currently plugged"
" into the computer.\n");
}
}
read_pcimap();
match_pci_modules();
return 0;
}
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