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/*
* The PCI Utilities -- Show Kernel Drivers
*
* Copyright (c) 1997--2008 Martin Mares <mj@ucw.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include "lspci.h"
#ifdef PCI_OS_LINUX
#include <sys/utsname.h>
struct pcimap_entry {
struct pcimap_entry *next;
unsigned int vendor, device;
unsigned int subvendor, subdevice;
unsigned int class, class_mask;
char module[1];
};
static struct pcimap_entry *pcimap_head;
static void
load_pcimap(void)
{
static int tried_pcimap;
struct utsname uts;
char *name, line[1024];
FILE *f;
if (tried_pcimap)
return;
tried_pcimap = 1;
if (name = opt_pcimap)
{
f = fopen(name, "r");
if (!f)
die("Cannot open pcimap file %s: %m", name);
}
else
{
if (uname(&uts) < 0)
die("uname() failed: %m");
name = alloca(64 + strlen(uts.release));
sprintf(name, "/lib/modules/%s/modules.pcimap", uts.release);
f = fopen(name, "r");
if (!f)
return;
}
while (fgets(line, sizeof(line), f))
{
char *c = strchr(line, '\n');
struct pcimap_entry *e;
if (!c)
die("Unterminated or too long line in %s", name);
*c = 0;
if (!line[0] || line[0] == '#')
continue;
c = line;
while (*c && *c != ' ' && *c != '\t')
c++;
if (!*c)
continue; /* FIXME: Emit warnings! */
*c++ = 0;
e = xmalloc(sizeof(*e) + strlen(line));
if (sscanf(c, "%i%i%i%i%i%i",
&e->vendor, &e->device,
&e->subvendor, &e->subdevice,
&e->class, &e->class_mask) != 6)
continue;
e->next = pcimap_head;
pcimap_head = e;
strcpy(e->module, line);
}
fclose(f);
}
static int
match_pcimap(struct device *d, struct pcimap_entry *e)
{
struct pci_dev *dev = d->dev;
unsigned int class = get_conf_long(d, PCI_REVISION_ID) >> 8;
word subv, subd;
#define MATCH(x, y) ((y) > 0xffff || (x) == (y))
get_subid(d, &subv, &subd);
return
MATCH(dev->vendor_id, e->vendor) &&
MATCH(dev->device_id, e->device) &&
MATCH(subv, e->subvendor) &&
MATCH(subd, e->subdevice) &&
(class & e->class_mask) == e->class;
#undef MATCH
}
#define DRIVER_BUF_SIZE 1024
static char *
find_driver(struct device *d, char *buf)
{
struct pci_dev *dev = d->dev;
char name[1024], *drv, *base;
int n;
if (dev->access->method != PCI_ACCESS_SYS_BUS_PCI)
return NULL;
base = pci_get_param(dev->access, "sysfs.path");
if (!base || !base[0])
return NULL;
n = snprintf(name, sizeof(name), "%s/devices/%04x:%02x:%02x.%d/driver",
base, dev->domain, dev->bus, dev->dev, dev->func);
if (n < 0 || n >= (int)sizeof(name))
die("show_driver: sysfs device name too long, why?");
n = readlink(name, buf, DRIVER_BUF_SIZE);
if (n < 0)
return NULL;
if (n >= DRIVER_BUF_SIZE)
return "<name-too-long>";
buf[n] = 0;
if (drv = strrchr(buf, '/'))
return drv+1;
else
return buf;
}
void
show_kernel(struct device *d)
{
char buf[DRIVER_BUF_SIZE];
char *driver;
struct pcimap_entry *e, *last = NULL;
if (driver = find_driver(d, buf))
printf("\tKernel driver in use: %s\n", driver);
load_pcimap();
for (e=pcimap_head; e; e=e->next)
if (match_pcimap(d, e) && (!last || strcmp(last->module, e->module)))
{
printf("%s %s", (last ? "," : "\tKernel modules:"), e->module);
last = e;
}
if (last)
putchar('\n');
}
void
show_kernel_machine(struct device *d)
{
char buf[DRIVER_BUF_SIZE];
char *driver;
struct pcimap_entry *e, *last = NULL;
if (driver = find_driver(d, buf))
printf("Driver:\t%s\n", driver);
load_pcimap();
for (e=pcimap_head; e; e=e->next)
if (match_pcimap(d, e) && (!last || strcmp(last->module, e->module)))
{
printf("Module:\t%s\n", e->module);
last = e;
}
}
#else
void
show_kernel(struct device *d UNUSED)
{
}
void
show_kernel_machine(struct device *d UNUSED)
{
}
#endif
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