minix/lib/libsys/pci_slot_name.c

   1 /*
   2 pci_slot_name.c
   3 */
   4
   5 #include "pci.h"
   6 #include "syslib.h"
   7 #include <minix/sysutil.h>
   8
   9 /*===========================================================================*
  10  *                              pci_slot_name                                *
  11  *===========================================================================*/
  12 char *pci_slot_name(devind)
  13 int devind;
  14 {
  15         static char name[80];   /* We need a better interface for this */
  16
  17         int r;
  18         cp_grant_id_t gid;
  19         message m;
  20
  21         gid= cpf_grant_direct(pci_procnr, (vir_bytes)name, sizeof(name),
  22                 CPF_WRITE);
  23         if (gid == -1)
  24         {
  25                 printf("pci_dev_name: cpf_grant_direct failed: %d\n",
  26                         errno);
  27                 return NULL;
  28         }
  29
  30         m.m_type= BUSC_PCI_SLOT_NAME_S;
  31         m.m1_i1= devind;
  32         m.m1_i2= sizeof(name);
  33         m.m1_i3= gid;
  34
  35         r= ipc_sendrec(pci_procnr, &m);
  36         cpf_revoke(gid);
  37         if (r != 0)
  38                 panic("pci_slot_name: can't talk to PCI: %d", r);
  39
  40         if (m.m_type != 0)
  41                 panic("pci_slot_name: got bad reply from PCI: %d", m.m_type);
  42
  43         name[sizeof(name)-1]= '\0';     /* Make sure that the string is NUL
  44                                          * terminated.
  45                                          */
  46         return name;
  47 }
  48