efi_connect.c File Reference

EFI driver connection and disconnection. More...

#include <errno.h>
#include <string.h>
#include <ipxe/efi/efi.h>

Go to the source code of this file.

Macros
#define	EINFO_EEFI_CONNECT
#define	EINFO_EEFI_CONNECT_PROHIBITED
#define	EEFI_CONNECT_PROHIBITED   __einfo_error ( EINFO_EEFI_CONNECT_PROHIBITED )
#define	EEFI_CONNECT(efirc)

Functions
	FILE_LICENCE (GPL2_OR_LATER_OR_UBDL)
	FILE_SECBOOT (PERMITTED)
int	efi_connect (EFI_HANDLE device, EFI_HANDLE driver)
	Connect UEFI driver(s) More...
int	efi_disconnect (EFI_HANDLE device, EFI_HANDLE driver)
	Disconnect UEFI driver(s) More...

Detailed Description

EFI driver connection and disconnection.

Definition in file efi_connect.c.

Macro Definition Documentation

EINFO_EEFI_CONNECT

#define EINFO_EEFI_CONNECT

Value:

__einfo_uniqify ( EINFO_EPLATFORM, 0x01,                        \
                          "Could not connect controllers" )

Definition at line 38 of file efi_connect.c.

EINFO_EEFI_CONNECT_PROHIBITED

#define EINFO_EEFI_CONNECT_PROHIBITED

Value:

__einfo_platformify ( EINFO_EEFI_CONNECT,                       \
                              EFI_SECURITY_VIOLATION,                   \
                              "Connecting controllers prohibited by "   \
                              "security policy" )

Definition at line 41 of file efi_connect.c.

EEFI_CONNECT_PROHIBITED

#define EEFI_CONNECT_PROHIBITED   __einfo_error ( EINFO_EEFI_CONNECT_PROHIBITED )

Definition at line 46 of file efi_connect.c.

EEFI_CONNECT

#define EEFI_CONNECT

(

efirc

)

Value:

EPLATFORM ( EINFO_EEFI_CONNECT, efirc,  \
                                          EEFI_CONNECT_PROHIBITED )

Definition at line 48 of file efi_connect.c.

Function Documentation

FILE_LICENCE()

FILE_LICENCE

(

GPL2_OR_LATER_OR_UBDL

)

FILE_SECBOOT()

FILE_SECBOOT

(

PERMITTED

)

efi_connect()

int efi_connect	(	EFI_HANDLE	device,
		EFI_HANDLE	driver
	)

Connect UEFI driver(s)

Parameters

device	EFI device handle
driver	EFI driver handle, or NULL

Return values

rc	Return status code

Definition at line 58 of file efi_connect.c.

                                                         {
        EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
        EFI_HANDLE driverlist[2] = { driver, NULL };
        EFI_HANDLE *drivers = ( driver ? driverlist : NULL );
        EFI_STATUS efirc;
        int rc;

        /* Attempt connection at external TPL */
        DBGC ( device, "EFI %s connecting ", efi_handle_name ( device ) );
        DBGC ( device, "%s driver at %s TPL\n",
               ( driver ? efi_handle_name ( driver ) : "any" ),
               efi_tpl_name ( efi_external_tpl ) );
        bs->RestoreTPL ( efi_external_tpl );
        efirc = bs->ConnectController ( device, drivers, NULL, TRUE );
        bs->RaiseTPL ( efi_internal_tpl );
        if ( efirc != 0 ) {
                rc = -EEFI_CONNECT ( efirc );
                DBGC ( device, "EFI %s could not connect: %s\n",
                       efi_handle_name ( device ), strerror ( rc ) );
                return rc;
        }

        return 0;
}

References EFI_SYSTEM_TABLE::BootServices, EFI_BOOT_SERVICES::ConnectController, DBGC, EEFI_CONNECT, efi_external_tpl, efi_handle_name(), efi_internal_tpl, efi_systab, efi_tpl_name(), NULL, EFI_BOOT_SERVICES::RaiseTPL, rc, EFI_BOOT_SERVICES::RestoreTPL, strerror(), and TRUE.

Referenced by efi_block_connect(), efi_driver_connect(), efi_driver_reconnect(), and efi_usb_probe().

efi_disconnect()

int efi_disconnect	(	EFI_HANDLE	device,
		EFI_HANDLE	driver
	)

Disconnect UEFI driver(s)

Parameters

device	EFI device handle
driver	EFI driver handle, or NULL

Return values

rc	Return status code

Definition at line 90 of file efi_connect.c.

                                                            {
        EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
        EFI_STATUS efirc;
        int rc;

        /* Attempt disconnection at external TPL */
        DBGC ( device, "EFI %s disconnecting ", efi_handle_name ( device ) );
        DBGC ( device, "%s driver at %s TPL\n",
               ( driver ? efi_handle_name ( driver ) : "any" ),
               efi_tpl_name ( efi_external_tpl ) );
        bs->RestoreTPL ( efi_external_tpl );
        efirc = bs->DisconnectController ( device, driver, NULL );
        bs->RaiseTPL ( efi_internal_tpl );
        if ( ( efirc != 0 ) && ( efirc != EFI_NOT_FOUND ) ) {
                rc = -EEFI ( efirc );
                DBGC ( device, "EFI %s could not disconnect: %s\n",
                       efi_handle_name ( device ), strerror ( rc ) );
                return rc;
        }

        return 0;
}

References EFI_SYSTEM_TABLE::BootServices, DBGC, EFI_BOOT_SERVICES::DisconnectController, EEFI, efi_external_tpl, efi_handle_name(), efi_internal_tpl, EFI_NOT_FOUND, efi_systab, efi_tpl_name(), NULL, EFI_BOOT_SERVICES::RaiseTPL, rc, EFI_BOOT_SERVICES::RestoreTPL, and strerror().

Referenced by efi_driver_disconnect(), efi_driver_exclude(), efi_usb_uninstall(), and efi_veto_disconnect().