src/arch/i386/interface/pcbios/ib_srpboot.c

   1 #include <stdint.h>
   2 #include <string.h>
   3 #include <stdlib.h>
   4 #include <stdio.h>
   5 #include <errno.h>
   6 #include <gpxe/sanboot.h>
   7 #include <int13.h>
   8 #include <gpxe/srp.h>
   9 #include <gpxe/sbft.h>
  10
  11 FILE_LICENCE ( GPL2_OR_LATER );
  12
  13 static int ib_srpboot ( const char *root_path ) {
  14         struct scsi_device *scsi;
  15         struct int13_drive *drive;
  16         int rc;
  17
  18         scsi = zalloc ( sizeof ( *scsi ) );
  19         if ( ! scsi ) {
  20                 rc = -ENOMEM;
  21                 goto err_alloc_scsi;
  22         }
  23         drive = zalloc ( sizeof ( *drive ) );
  24         if ( ! drive ) {
  25                 rc = -ENOMEM;
  26                 goto err_alloc_drive;
  27         }
  28
  29         if ( ( rc = srp_attach ( scsi, root_path ) ) != 0 ) {
  30                 printf ( "Could not attach IB_SRP device: %s\n",
  31                          strerror ( rc ) );
  32                 goto err_attach;
  33         }
  34         if ( ( rc = init_scsidev ( scsi ) ) != 0 ) {
  35                 printf ( "Could not initialise IB_SRP device: %s\n",
  36                          strerror ( rc ) );
  37                 goto err_init;
  38         }
  39
  40         drive->blockdev = &scsi->blockdev;
  41
  42         /* FIXME: ugly, ugly hack */
  43         struct srp_device *srp =
  44                 container_of ( scsi->backend, struct srp_device, refcnt );
  45         sbft_fill_data ( srp );
  46
  47         register_int13_drive ( drive );
  48         printf ( "Registered as BIOS drive %#02x\n", drive->drive );
  49         printf ( "Booting from BIOS drive %#02x\n", drive->drive );
  50         rc = int13_boot ( drive->drive );
  51         printf ( "Boot failed\n" );
  52
  53         /* Leave drive registered, if instructed to do so */
  54         if ( keep_san() )
  55                 return rc;
  56
  57         printf ( "Unregistering BIOS drive %#02x\n", drive->drive );
  58         unregister_int13_drive ( drive );
  59
  60  err_init:
  61         srp_detach ( scsi );
  62  err_attach:
  63         free ( drive );
  64  err_alloc_drive:
  65         free ( scsi );
  66  err_alloc_scsi:
  67         return rc;
  68 }
  69
  70 struct sanboot_protocol ib_srp_sanboot_protocol __sanboot_protocol = {
  71         .prefix = "ib_srp:",
  72         .boot = ib_srpboot,
  73 };