134 lines
3.2 KiB
C
134 lines
3.2 KiB
C
/*
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* Copyright (C) 2017 Michael Brown <mbrown@fensystems.co.uk>.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*
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* You can also choose to distribute this program under the terms of
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* the Unmodified Binary Distribution Licence (as given in the file
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* COPYING.UBDL), provided that you have satisfied its requirements.
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*/
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FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
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/** @file
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*
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* Dummy SAN device
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*
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*/
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#include <errno.h>
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#include <ipxe/sanboot.h>
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/**
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* Hook dummy SAN device
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*
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* @v drive Drive number
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* @v uris List of URIs
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* @v count Number of URIs
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* @v flags Flags
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* @ret drive Drive number, or negative error
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*/
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static int dummy_san_hook ( unsigned int drive, struct uri **uris,
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unsigned int count, unsigned int flags ) {
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struct san_device *sandev;
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int rc;
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/* Allocate SAN device */
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sandev = alloc_sandev ( uris, count, 0 );
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if ( ! sandev ) {
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rc = -ENOMEM;
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goto err_alloc;
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}
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/* Register SAN device */
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if ( ( rc = register_sandev ( sandev, drive, flags ) ) != 0 ) {
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DBGC ( sandev, "SAN %#02x could not register: %s\n",
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sandev->drive, strerror ( rc ) );
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goto err_register;
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}
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return drive;
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unregister_sandev ( sandev );
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err_register:
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sandev_put ( sandev );
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err_alloc:
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return rc;
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}
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/**
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* Unhook dummy SAN device
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*
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* @v drive Drive number
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*/
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static void dummy_san_unhook ( unsigned int drive ) {
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struct san_device *sandev;
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/* Find drive */
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sandev = sandev_find ( drive );
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if ( ! sandev ) {
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DBG ( "SAN %#02x does not exist\n", drive );
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return;
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}
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/* Unregister SAN device */
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unregister_sandev ( sandev );
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/* Drop reference to drive */
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sandev_put ( sandev );
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}
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/**
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* Boot from dummy SAN device
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*
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* @v drive Drive number
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* @v filename Filename (or NULL to use default)
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* @ret rc Return status code
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*/
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static int dummy_san_boot ( unsigned int drive __unused,
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const char *filename __unused ) {
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return -EOPNOTSUPP;
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}
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/**
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* Install ACPI table
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*
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* @v acpi ACPI description header
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* @ret rc Return status code
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*/
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static int dummy_install ( struct acpi_header *acpi ) {
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DBGC ( acpi, "ACPI table %s:\n", acpi_name ( acpi->signature ) );
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DBGC_HDA ( acpi, 0, acpi, le32_to_cpu ( acpi->length ) );
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return 0;
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}
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/**
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* Describe dummy SAN device
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*
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* @ret rc Return status code
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*/
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static int dummy_san_describe ( void ) {
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return acpi_install ( dummy_install );
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}
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PROVIDE_SANBOOT ( dummy, san_hook, dummy_san_hook );
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PROVIDE_SANBOOT ( dummy, san_unhook, dummy_san_unhook );
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PROVIDE_SANBOOT ( dummy, san_boot, dummy_san_boot );
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PROVIDE_SANBOOT ( dummy, san_describe, dummy_san_describe );
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