minix/lib/libsys/pci_dev_name.c

   1 /*
   2 pci_dev_name.c
   3 */
   4
   5 #include "pci.h"
   6 #include "syslib.h"
   7 #include <minix/sysutil.h>
   8
   9 /*===========================================================================*
  10  *                              pci_dev_name                                 *
  11  *===========================================================================*/
  12 char *pci_dev_name(u16_t vid, u16_t did)
  13 {
  14         static char name[80];   /* We need a better interface for this */
  15
  16         int r;
  17         cp_grant_id_t gid;
  18         message m;
  19
  20         gid= cpf_grant_direct(pci_procnr, (vir_bytes)name, sizeof(name),
  21                 CPF_WRITE);
  22         if (gid == -1)
  23         {
  24                 printf("pci_dev_name: cpf_grant_direct failed: %d\n",
  25                         errno);
  26                 return NULL;
  27         }
  28
  29         m.m_type= BUSC_PCI_DEV_NAME_S;
  30         m.m7_i1= vid;
  31         m.m7_i2= did;
  32         m.m7_i3= sizeof(name);
  33         m.m7_i4= gid;
  34
  35         r= ipc_sendrec(pci_procnr, &m);
  36         cpf_revoke(gid);
  37         if (r != 0)
  38                 panic("pci_dev_name: can't talk to PCI: %d", r);
  39
  40         if (m.m_type == ENOENT)
  41         {
  42 #ifdef DEBUG
  43                 printf("pci_dev_name: got no name\n");
  44 #endif
  45                 return NULL;    /* No name for this device */
  46         }
  47         if (m.m_type != 0)
  48                 panic("pci_dev_name: got bad reply from PCI: %d", m.m_type);
  49
  50         name[sizeof(name)-1]= '\0';     /* Make sure that the string is NUL
  51                                          * terminated.
  52                                          */
  53
  54 #ifdef DEBUG
  55         printf("pci_dev_name: got name %s\n", name);
  56 #endif
  57         return name;
  58 }
  59