lib/filter.c

   1 /*
   2  *      $Id: filter.c,v 1.1 1999/01/22 21:05:22 mj Exp $
   3  *
   4  *      Linux PCI Library -- Device Filtering
   5  *
   6  *      Copyright (c) 1998--1999 Martin Mares <mj@atrey.karlin.mff.cuni.cz>
   7  *
   8  *      Can be freely distributed and used under the terms of the GNU GPL.
   9  */
  10
  11 #include <stdlib.h>
  12 #include <string.h>
  13
  14 #include "internal.h"
  15
  16 void
  17 pci_filter_init(struct pci_access * UNUSED a, struct pci_filter *f)
  18 {
  19   f->bus = f->slot = f->func = -1;
  20   f->vendor = f->device = -1;
  21 }
  22
  23 /* Slot filter syntax: [[bus]:][slot][.[func]] */
  24
  25 char *
  26 pci_filter_parse_slot(struct pci_filter *f, char *str)
  27 {
  28   char *colon = strchr(str, ':');
  29   char *dot = strchr((colon ? colon + 1 : str), '.');
  30   char *mid = str;
  31   char *e;
  32
  33   if (colon)
  34     {
  35       *colon++ = 0;
  36       mid = colon;
  37       if (str[0] && strcmp(str, "*"))
  38         {
  39           long int x = strtol(str, &e, 16);
  40           if ((e && *e) || (x < 0 || x >= 0xff))
  41             return "Invalid bus number";
  42           f->bus = x;
  43         }
  44     }
  45   if (dot)
  46     *dot++ = 0;
  47   if (mid[0] && strcmp(mid, "*"))
  48     {
  49       long int x = strtol(mid, &e, 16);
  50       if ((e && *e) || (x < 0 || x >= 0x1f))
  51         return "Invalid slot number";
  52       f->slot = x;
  53     }
  54   if (dot && dot[0] && strcmp(dot, "*"))
  55     {
  56       long int x = strtol(dot, &e, 16);
  57       if ((e && *e) || (x < 0 || x >= 7))
  58         return "Invalid function number";
  59       f->func = x;
  60     }
  61   return NULL;
  62 }
  63
  64 /* ID filter syntax: [vendor]:[device] */
  65
  66 char *
  67 pci_filter_parse_id(struct pci_filter *f, char *str)
  68 {
  69   char *s, *e;
  70
  71   if (!*str)
  72     return NULL;
  73   s = strchr(str, ':');
  74   if (!s)
  75     return "':' expected";
  76   *s++ = 0;
  77   if (str[0] && strcmp(str, "*"))
  78     {
  79       long int x = strtol(str, &e, 16);
  80       if ((e && *e) || (x < 0 || x >= 0xffff))
  81         return "Invalid vendor ID";
  82       f->vendor = x;
  83     }
  84   if (s[0] && strcmp(s, "*"))
  85     {
  86       long int x = strtol(s, &e, 16);
  87       if ((e && *e) || (x < 0 || x >= 0xffff))
  88         return "Invalid device ID";
  89       f->device = x;
  90     }
  91   return NULL;
  92 }
  93
  94 int
  95 pci_filter_match(struct pci_filter *f, struct pci_dev *d)
  96 {
  97   if ((f->bus >= 0 && f->bus != d->bus) ||
  98       (f->slot >= 0 && f->slot != d->dev) ||
  99       (f->func >= 0 && f->func != d->func))
 100     return 0;
 101   if (f->device >= 0 || f->vendor >= 0)
 102     {
 103       pci_fill_info(d, PCI_FILL_IDENT);
 104       if ((f->device >= 0 && f->device != d->device_id) ||
 105           (f->vendor >= 0 && f->vendor != d->vendor_id))
 106         return 0;
 107     }
 108   return 1;
 109 }