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[efi] Allow driver to be unloaded

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Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2014-03-10 15:42:21 +00:00
parent 9681170fbe
commit 8de6b973c4
5 changed files with 159 additions and 4 deletions
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46
src/interface/efi/efi_driver.c
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@@ -122,7 +122,7 @@ efi_driver_get_controller_name ( EFI_COMPONENT_NAME2_PROTOCOL *wtf __unused,
* Install EFI driver
*
* @v efidrv EFI driver
* @ret efirc EFI status code
* @ret rc Return status code
*/
int efi_driver_install ( struct efi_driver *efidrv ) {
EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
@@ -143,7 +143,9 @@ int efi_driver_install ( struct efi_driver *efidrv ) {
efi_snprintf ( efidrv->wname,
( sizeof ( efidrv->wname ) /
sizeof ( efidrv->wname[0] ) ),
PRODUCT_SHORT_NAME " - %s", efidrv->name );
PRODUCT_SHORT_NAME "%s%s",
( efidrv->name ? " - " : "" ),
( efidrv->name ? efidrv->name : "" ) );
/* Install driver */
if ( ( efirc = bs->InstallMultipleProtocolInterfaces (
@@ -160,3 +162,43 @@ int efi_driver_install ( struct efi_driver *efidrv ) {
DBGC ( efidrv, "EFIDRV %s installed\n", efidrv->name );
return 0;
}
/**
* Uninstall EFI driver
*
* @v efidrv EFI driver
*/
void efi_driver_uninstall ( struct efi_driver *efidrv ) {
EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
EFI_HANDLE *handles;
UINTN num_handles;
EFI_STATUS efirc;
UINTN i;
int rc;
/* Disconnect the driver from its devices */
if ( ( efirc = bs->LocateHandleBuffer ( AllHandles, NULL, NULL,
&num_handles,
&handles ) ) != 0 ) {
rc = -EEFI ( efirc );
DBGC ( efidrv, "EFIDRV %s could not list handles: %s\n",
efidrv->name, strerror ( rc ) );
/* No way to disconnect driver; leave it loaded */
return;
}
DBGC ( efidrv, "EFIDRV %s disconnecting devices\n", efidrv->name );
for ( i = 0 ; i < num_handles ; i++ ) {
bs->DisconnectController ( handles[i],
efidrv->driver.DriverBindingHandle,
NULL );
}
bs->FreePool ( handles );
/* Uninstall the driver */
bs->UninstallMultipleProtocolInterfaces (
efidrv->driver.DriverBindingHandle,
&efi_driver_binding_protocol_guid, &efidrv->driver,
&efi_component_name2_protocol_guid, &efidrv->wtf,
NULL );
DBGC ( efidrv, "EFIDRV %s uninstalled\n", efidrv->name );
}