minix/lib/libsys/pci_find_dev.c

   1 /*
   2 pci_find_dev.c
   3 */
   4
   5 #include "pci.h"
   6 #include "syslib.h"
   7 #include <minix/sysutil.h>
   8
   9 /*===========================================================================*
  10  *                              pci_find_dev                                 *
  11  *===========================================================================*/
  12 int pci_find_dev(u8_t bus, u8_t dev, u8_t func, int *devindp)
  13 {
  14         int r;
  15         message m;
  16
  17         m.m_type= BUSC_PCI_FIND_DEV;
  18         m.m1_i1= bus;
  19         m.m1_i2= dev;
  20         m.m1_i3= func;
  21
  22         r= ipc_sendrec(pci_procnr, &m);
  23         if (r != 0)
  24                 panic("pci_find_dev: can't talk to PCI: %d", r);
  25
  26         if (m.m_type == 1)
  27         {
  28                 *devindp= m.m1_i1;
  29                 printf("pci_find_dev: got device %d for %d.%d.%d\n",
  30                         *devindp, bus, dev, func);
  31                 return 1;
  32         }
  33         if (m.m_type != 0)
  34                 panic("pci_find_dev: got bad reply from PCI: %d", m.m_type);
  35
  36         printf("pci_find_dev: got nothing\n");
  37         return 0;
  38 }
  39