mirror of https://github.com/ipxe/ipxe.git
124 lines
3.4 KiB
C
124 lines
3.4 KiB
C
/*
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* Copyright (C) 2014 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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#include <errno.h>
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#include <ipxe/efi/efi.h>
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#include <ipxe/efi/efi_driver.h>
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#include <ipxe/efi/efi_snp.h>
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#include <ipxe/efi/efi_utils.h>
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#include "snpnet.h"
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#include "nii.h"
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/** @file
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*
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* SNP driver
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*
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*/
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/**
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* Check to see if driver supports a device
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*
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* @v device EFI device handle
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* @v protocol Protocol GUID
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* @ret rc Return status code
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*/
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static int snp_nii_supported ( EFI_HANDLE device, EFI_GUID *protocol ) {
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EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
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EFI_HANDLE parent;
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EFI_STATUS efirc;
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int rc;
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/* Check that this is not a device we are providing ourselves */
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if ( find_snpdev ( device ) != NULL ) {
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DBGCP ( device, "HANDLE %s is provided by this binary\n",
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efi_handle_name ( device ) );
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return -ENOTTY;
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}
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/* Test for presence of protocol */
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if ( ( efirc = bs->OpenProtocol ( device, protocol,
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NULL, efi_image_handle, device,
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EFI_OPEN_PROTOCOL_TEST_PROTOCOL))!=0){
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DBGCP ( device, "HANDLE %s is not a %s device\n",
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efi_handle_name ( device ),
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efi_guid_ntoa ( protocol ) );
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return -EEFI ( efirc );
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}
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/* Check that there are no instances of this protocol further
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* up this device path.
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*/
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if ( ( rc = efi_locate_device ( device, protocol,
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&parent, 1 ) ) == 0 ) {
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DBGC2 ( device, "HANDLE %s has %s-supporting parent ",
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efi_handle_name ( device ),
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efi_guid_ntoa ( protocol ) );
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DBGC2 ( device, "%s\n", efi_handle_name ( parent ) );
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return -ENOTTY;
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}
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DBGC ( device, "HANDLE %s is a %s device\n",
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efi_handle_name ( device ), efi_guid_ntoa ( protocol ) );
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return 0;
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}
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/**
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* Check to see if driver supports a device
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*
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* @v device EFI device handle
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* @ret rc Return status code
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*/
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static int snp_supported ( EFI_HANDLE device ) {
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return snp_nii_supported ( device, &efi_simple_network_protocol_guid );
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}
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/**
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* Check to see if driver supports a device
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*
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* @v device EFI device handle
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* @ret rc Return status code
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*/
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static int nii_supported ( EFI_HANDLE device ) {
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return snp_nii_supported ( device, &efi_nii31_protocol_guid );
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}
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/** EFI SNP driver */
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struct efi_driver snp_driver __efi_driver ( EFI_DRIVER_NORMAL ) = {
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.name = "SNP",
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.supported = snp_supported,
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.start = snpnet_start,
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.stop = snpnet_stop,
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};
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/** EFI NII driver */
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struct efi_driver nii_driver __efi_driver ( EFI_DRIVER_NORMAL ) = {
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.name = "NII",
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.supported = nii_supported,
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.start = nii_start,
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.stop = nii_stop,
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};
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