1 /*
2  * Copyright (c) 2017 Eric McCorkle
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  *
14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24  * SUCH DAMAGE.
25  */
26 
27 #include <stdbool.h>
28 
29 #include <efi.h>
30 #include <efilib.h>
31 
32 #include "efi_driver_utils.h"
33 
34 static EFI_GUID DriverBindingProtocolGUID = DRIVER_BINDING_PROTOCOL;
35 
36 EFI_STATUS
connect_controllers(EFI_GUID * filter)37 connect_controllers(EFI_GUID *filter)
38 {
39         EFI_STATUS status;
40         EFI_HANDLE *handles;
41         UINTN nhandles, i, hsize;
42 
43         nhandles = 0;
44         hsize = 0;
45         status = BS->LocateHandle(ByProtocol, filter, NULL,
46                      &hsize, NULL);
47 
48         if(status != EFI_BUFFER_TOO_SMALL) {
49                 return (status);
50         }
51 
52         handles = malloc(hsize);
53         nhandles = hsize / sizeof(EFI_HANDLE);
54 
55         status = BS->LocateHandle(ByProtocol, filter, NULL,
56                      &hsize, handles);
57 
58         if(EFI_ERROR(status)) {
59                 return (status);
60         }
61 
62         for(i = 0; i < nhandles; i++) {
63                 BS->ConnectController(handles[i], NULL, NULL, true);
64         }
65 
66         free(handles);
67 
68         return (status);
69 }
70 
71 EFI_STATUS
install_driver(EFI_DRIVER_BINDING * driver)72 install_driver(EFI_DRIVER_BINDING *driver)
73 {
74         EFI_STATUS status;
75 
76         driver->ImageHandle = IH;
77         driver->DriverBindingHandle = NULL;
78         status = BS->InstallMultipleProtocolInterfaces(
79             &(driver->DriverBindingHandle),
80             &DriverBindingProtocolGUID, driver,
81             NULL);
82 
83         if (EFI_ERROR(status)) {
84                 printf("Failed to install driver (%ld)!\n",
85                     EFI_ERROR_CODE(status));
86         }
87 
88         return (status);
89 }
90