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

   1 /*
   2  * Copyright (C) 2009 Fen Systems Ltd <mbrown@fensystems.co.uk>.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  *   Redistributions of source code must retain the above copyright
  10  *   notice, this list of conditions and the following disclaimer.
  11  *
  12  *   Redistributions in binary form must reproduce the above copyright
  13  *   notice, this list of conditions and the following disclaimer in
  14  *   the documentation and/or other materials provided with the
  15  *   distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  18  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  19  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  20  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  21  * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
  22  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  23  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  24  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  26  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  28  * OF THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 FILE_LICENCE ( BSD2 );
  32
  33 /** @file
  34  *
  35  * SRP boot firmware table
  36  *
  37  */
  38
  39 #include <assert.h>
  40 #include <realmode.h>
  41 #include <gpxe/srp.h>
  42 #include <gpxe/ib_srp.h>
  43 #include <gpxe/acpi.h>
  44 #include <gpxe/sbft.h>
  45
  46 #define sbftab __use_data16 ( sbftab )
  47 /** The sBFT used by gPXE */
  48 struct gpxe_sbft __data16 ( sbftab ) = {
  49         /* Table header */
  50         .table = {
  51                 /* ACPI header */
  52                 .acpi = {
  53                         .signature = SBFT_SIG,
  54                         .length = sizeof ( sbftab ),
  55                         .revision = 1,
  56                         .oem_id = "FENSYS",
  57                         .oem_table_id = "gPXE",
  58                 },
  59                 .scsi_offset = offsetof ( typeof ( sbftab ), scsi ),
  60                 .srp_offset = offsetof ( typeof ( sbftab ), srp ),
  61                 .ib_offset = offsetof ( typeof ( sbftab ), ib ),
  62         },
  63 };
  64
  65 /**
  66  * Fill in all variable portions of sBFT
  67  *
  68  * @v srp               SRP device
  69  * @ret rc              Return status code
  70  */
  71 int sbft_fill_data ( struct srp_device *srp ) {
  72         struct sbft_scsi_subtable *sbft_scsi = &sbftab.scsi;
  73         struct sbft_srp_subtable *sbft_srp = &sbftab.srp;
  74         struct sbft_ib_subtable *sbft_ib = &sbftab.ib;
  75         struct ib_srp_parameters *ib_params;
  76         struct segoff rm_sbftab = {
  77                 .segment = rm_ds,
  78                 .offset = __from_data16 ( &sbftab ),
  79         };
  80
  81         /* Fill in the SCSI subtable */
  82         memcpy ( &sbft_scsi->lun, &srp->lun, sizeof ( sbft_scsi->lun ) );
  83
  84         /* Fill in the SRP subtable */
  85         memcpy ( &sbft_srp->port_ids, &srp->port_ids,
  86                  sizeof ( sbft_srp->port_ids ) );
  87
  88         /* Fill in the IB subtable */
  89         assert ( srp->transport == &ib_srp_transport );
  90         ib_params = ib_srp_params ( srp );
  91         memcpy ( &sbft_ib->sgid, &ib_params->sgid, sizeof ( sbft_ib->sgid ) );
  92         memcpy ( &sbft_ib->dgid, &ib_params->dgid, sizeof ( sbft_ib->dgid ) );
  93         memcpy ( &sbft_ib->service_id, &ib_params->service_id,
  94                  sizeof ( sbft_ib->service_id ) );
  95         sbft_ib->pkey = ib_params->pkey;
  96
  97         /* Update checksum */
  98         acpi_fix_checksum ( &sbftab.table.acpi );
  99
 100         DBGC ( &sbftab, "SRP Boot Firmware Table at %04x:%04x:\n",
 101                rm_sbftab.segment, rm_sbftab.offset );
 102         DBGC_HDA ( &sbftab, rm_sbftab, &sbftab, sizeof ( sbftab ) );
 103
 104         return 0;
 105 }