1 /** @file
2 Component Name functions implementation for XenBus Bus driver.
3
4 Copyright (C) 2014, Citrix Ltd.
5
6 This program and the accompanying materials
7 are licensed and made available under the terms and conditions of the BSD License
8 which accompanies this distribution. The full text of the license may be found at
9 http://opensource.org/licenses/bsd-license.php
10
11 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
12 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
13
14 **/
15
16 #include "XenBusDxe.h"
17
18 ///
19 /// Component Name Protocol instance
20 ///
21 GLOBAL_REMOVE_IF_UNREFERENCED
22 EFI_COMPONENT_NAME_PROTOCOL gXenBusDxeComponentName = {
23 (EFI_COMPONENT_NAME_GET_DRIVER_NAME) XenBusDxeComponentNameGetDriverName,
24 (EFI_COMPONENT_NAME_GET_CONTROLLER_NAME)XenBusDxeComponentNameGetControllerName,
25 "eng"
26 };
27
28 ///
29 /// Component Name 2 Protocol instance
30 ///
31 GLOBAL_REMOVE_IF_UNREFERENCED
32 EFI_COMPONENT_NAME2_PROTOCOL gXenBusDxeComponentName2 = {
33 XenBusDxeComponentNameGetDriverName,
34 XenBusDxeComponentNameGetControllerName,
35 "en"
36 };
37
38 ///
39 /// Table of driver names
40 ///
41 GLOBAL_REMOVE_IF_UNREFERENCED
42 EFI_UNICODE_STRING_TABLE mXenBusDxeDriverNameTable[] = {
43 { "eng;en", (CHAR16 *)L"XenBus Bus Driver" },
44 { NULL, NULL }
45 };
46
47 ///
48 /// Table of controller names
49 ///
50 GLOBAL_REMOVE_IF_UNREFERENCED
51 EFI_UNICODE_STRING_TABLE mXenBusDxeControllerNameTable[] = {
52 { "eng;en", (CHAR16 *)L"XenBus Controller" },
53 { NULL, NULL }
54 };
55
56 /**
57 Retrieves a Unicode string that is the user-readable name of the EFI Driver.
58
59 @param This A pointer to the EFI_COMPONENT_NAME_PROTOCOL instance.
60 @param Language A pointer to a three-character ISO 639-2 language identifier.
61 This is the language of the driver name that that the caller
62 is requesting, and it must match one of the languages specified
63 in SupportedLanguages. The number of languages supported by a
64 driver is up to the driver writer.
65 @param DriverName A pointer to the Unicode string to return. This Unicode string
66 is the name of the driver specified by This in the language
67 specified by Language.
68
69 @retval EFI_SUCCESS The Unicode string for the Driver specified by This
70 and the language specified by Language was returned
71 in DriverName.
72 @retval EFI_INVALID_PARAMETER Language is NULL.
73 @retval EFI_INVALID_PARAMETER DriverName is NULL.
74 @retval EFI_UNSUPPORTED The driver specified by This does not support the
75 language specified by Language.
76
77 **/
78 EFI_STATUS
79 EFIAPI
XenBusDxeComponentNameGetDriverName(IN EFI_COMPONENT_NAME2_PROTOCOL * This,IN CHAR8 * Language,OUT CHAR16 ** DriverName)80 XenBusDxeComponentNameGetDriverName (
81 IN EFI_COMPONENT_NAME2_PROTOCOL *This,
82 IN CHAR8 *Language,
83 OUT CHAR16 **DriverName
84 )
85 {
86 return LookupUnicodeString2 (
87 Language,
88 This->SupportedLanguages,
89 mXenBusDxeDriverNameTable,
90 DriverName,
91 (BOOLEAN)(This != &gXenBusDxeComponentName2)
92 );
93 }
94
95 /**
96 Retrieves a Unicode string that is the user readable name of the controller
97 that is being managed by an EFI Driver.
98
99 @param This A pointer to the EFI_COMPONENT_NAME_PROTOCOL instance.
100 @param ControllerHandle The handle of a controller that the driver specified by
101 This is managing. This handle specifies the controller
102 whose name is to be returned.
103 @param ChildHandle The handle of the child controller to retrieve the name
104 of. This is an optional parameter that may be NULL. It
105 will be NULL for device drivers. It will also be NULL
106 for a bus drivers that wish to retrieve the name of the
107 bus controller. It will not be NULL for a bus driver
108 that wishes to retrieve the name of a child controller.
109 @param Language A pointer to a three character ISO 639-2 language
110 identifier. This is the language of the controller name
111 that the caller is requesting, and it must match one
112 of the languages specified in SupportedLanguages. The
113 number of languages supported by a driver is up to the
114 driver writer.
115 @param ControllerName A pointer to the Unicode string to return. This Unicode
116 string is the name of the controller specified by
117 ControllerHandle and ChildHandle in the language specified
118 by Language, from the point of view of the driver specified
119 by This.
120
121 @retval EFI_SUCCESS The Unicode string for the user-readable name in the
122 language specified by Language for the driver
123 specified by This was returned in DriverName.
124 @retval EFI_INVALID_PARAMETER ControllerHandle is NULL.
125 @retval EFI_INVALID_PARAMETER ChildHandle is not NULL and it is not a valid EFI_HANDLE.
126 @retval EFI_INVALID_PARAMETER Language is NULL.
127 @retval EFI_INVALID_PARAMETER ControllerName is NULL.
128 @retval EFI_UNSUPPORTED The driver specified by This is not currently managing
129 the controller specified by ControllerHandle and
130 ChildHandle.
131 @retval EFI_UNSUPPORTED The driver specified by This does not support the
132 language specified by Language.
133
134 **/
135 EFI_STATUS
136 EFIAPI
XenBusDxeComponentNameGetControllerName(IN EFI_COMPONENT_NAME2_PROTOCOL * This,IN EFI_HANDLE ControllerHandle,IN EFI_HANDLE ChildHandle OPTIONAL,IN CHAR8 * Language,OUT CHAR16 ** ControllerName)137 XenBusDxeComponentNameGetControllerName (
138 IN EFI_COMPONENT_NAME2_PROTOCOL *This,
139 IN EFI_HANDLE ControllerHandle,
140 IN EFI_HANDLE ChildHandle OPTIONAL,
141 IN CHAR8 *Language,
142 OUT CHAR16 **ControllerName
143 )
144 {
145 EFI_STATUS Status;
146
147 if (ChildHandle != NULL) {
148 // TODO Get controller name for a child.
149 return EFI_UNSUPPORTED;
150 }
151
152 //
153 // Make sure this driver is currently managing ControllerHandle
154 //
155 Status = EfiTestManagedDevice (
156 ControllerHandle,
157 gXenBusDxeDriverBinding.DriverBindingHandle,
158 &gXenIoProtocolGuid
159 );
160 if (EFI_ERROR (Status)) {
161 return Status;
162 }
163
164 //
165 // Lookup name of controller specified by ControllerHandle
166 //
167 return LookupUnicodeString2 (
168 Language,
169 This->SupportedLanguages,
170 mXenBusDxeControllerNameTable,
171 ControllerName,
172 (BOOLEAN)(This != &gXenBusDxeComponentName2)
173 );
174 }
175