/*
* Copyright (C) 2014 Michael Brown <mbrown@fensystems.co.uk>.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*
* You can also choose to distribute this program under the terms of
* the Unmodified Binary Distribution Licence (as given in the file
* COPYING.UBDL), provided that you have satisfied its requirements.
*/
FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
#include <errno.h>
#include <ipxe/efi/efi.h>
#include <ipxe/efi/efi_driver.h>
#include <ipxe/efi/efi_snp.h>
#include <ipxe/efi/efi_utils.h>
#include "snpnet.h"
#include "nii.h"
/** @file
*
* SNP driver
*
*/
/**
* Check to see if driver supports a device
*
* @v device EFI device handle
* @v protocol Protocol GUID
* @ret rc Return status code
*/
static int snp_nii_supported ( EFI_HANDLE device, EFI_GUID *protocol ) {
EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
EFI_HANDLE parent;
EFI_STATUS efirc;
int rc;
/* Check that this is not a device we are providing ourselves */
if ( find_snpdev ( device ) != NULL ) {
DBGCP ( device, "HANDLE %s is provided by this binary\n",
efi_handle_name ( device ) );
return -ENOTTY;
}
/* Test for presence of protocol */
if ( ( efirc = bs->OpenProtocol ( device, protocol,
NULL, efi_image_handle, device,
EFI_OPEN_PROTOCOL_TEST_PROTOCOL))!=0){
DBGCP ( device, "HANDLE %s is not a %s device\n",
efi_handle_name ( device ),
efi_guid_ntoa ( protocol ) );
return -EEFI ( efirc );
}
/* Check that there are no instances of this protocol further
* up this device path.
*/
if ( ( rc = efi_locate_device ( device, protocol,
&parent, 1 ) ) == 0 ) {
DBGC2 ( device, "HANDLE %s has %s-supporting parent ",
efi_handle_name ( device ),
efi_guid_ntoa ( protocol ) );
DBGC2 ( device, "%s\n", efi_handle_name ( parent ) );
return -ENOTTY;
}
DBGC ( device, "HANDLE %s is a %s device\n",
efi_handle_name ( device ), efi_guid_ntoa ( protocol ) );
return 0;
}
/**
* Check to see if driver supports a device
*
* @v device EFI device handle
* @ret rc Return status code
*/
static int snp_supported ( EFI_HANDLE device ) {
return snp_nii_supported ( device, &efi_simple_network_protocol_guid );
}
/**
* Check to see if driver supports a device
*
* @v device EFI device handle
* @ret rc Return status code
*/
static int nii_supported ( EFI_HANDLE device ) {
return snp_nii_supported ( device, &efi_nii31_protocol_guid );
}
/** EFI SNP driver */
struct efi_driver snp_driver __efi_driver ( EFI_DRIVER_NORMAL ) = {
.name = "SNP",
.supported = snp_supported,
.start = snpnet_start,
.stop = snpnet_stop,
};
/** EFI NII driver */
struct efi_driver nii_driver __efi_driver ( EFI_DRIVER_NORMAL ) = {
.name = "NII",
.supported = nii_supported,
.start = nii_start,
.stop = nii_stop,
};
