lib/syslib/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 PUBLIC char *pci_dev_name(vid, did)
  13 u16_t vid;
  14 u16_t did;
  15 {
  16         static char name[PCIINFO_ENTRY_SIZE];   /* We need a better interface for this */
  17
  18         int r;
  19         cp_grant_id_t gid;
  20         message m;
  21
  22         gid= cpf_grant_direct(pci_procnr, (vir_bytes)name, sizeof(name),
  23                 CPF_WRITE);
  24         if (gid == -1)
  25         {
  26                 printf("pci_dev_name: cpf_grant_direct failed: %d\n",
  27                         errno);
  28                 return NULL;
  29         }
  30
  31         m.m_type= BUSC_PCI_DEV_NAME_S;
  32         m.m7_i1= vid;
  33         m.m7_i2= did;
  34         m.m7_i3= sizeof(name);
  35         m.m7_i4= gid;
  36
  37         r= sendrec(pci_procnr, &m);
  38         cpf_revoke(gid);
  39         if (r != 0)
  40                 panic("syslib/" __FILE__, "pci_dev_name: can't talk to PCI", r);
  41
  42         if (m.m_type == ENOENT)
  43         {
  44 #if DEBUG
  45                 printf("pci_dev_name: got no name\n");
  46 #endif
  47                 return NULL;    /* No name for this device */
  48         }
  49         if (m.m_type != 0)
  50                 panic("syslib/" __FILE__, "pci_dev_name: got bad reply from PCI", m.m_type);
  51
  52         name[sizeof(name)-1]= '\0';     /* Make sure that the string is NUL
  53                                          * terminated.
  54                                          */
  55
  56 #if DEBUG
  57         printf("pci_dev_name: got name %s\n", name);
  58 #endif
  59         return name;
  60 }
  61