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1 | /** @file\r | |
2 | The EFI_FORM_CALLBACK_PROTOCOL is the defined interface for access to custom\r | |
3 | NV storage devices and for communication of user selections in a more\r | |
4 | interactive environment. This protocol should be published by hardware\r | |
5 | specific drivers that want to export access to custom hardware storage or\r | |
6 | publish IFR that need to call back the original driver.\r | |
7 | \r | |
8 | Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>\r | |
9 | This program and the accompanying materials are licensed and made available under\r | |
10 | the terms and conditions of the BSD License that accompanies this distribution.\r | |
11 | The full text of the license may be found at\r | |
12 | http://opensource.org/licenses/bsd-license.php.\r | |
13 | \r | |
14 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
15 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
16 | \r | |
17 | @par Revision Reference:\r | |
18 | This protocol is defined in HII spec 0.92.\r | |
19 | \r | |
20 | **/\r | |
21 | \r | |
22 | #ifndef __FRAMEWORK_FORM_CALLBACK_H__\r | |
23 | #define __FRAMEWORK_FORM_CALLBACK_H__\r | |
24 | \r | |
25 | #include <Protocol/FrameworkHii.h>\r | |
26 | #include <Protocol/FrameworkFormBrowser.h>\r | |
27 | \r | |
28 | #define EFI_FORM_CALLBACK_PROTOCOL_GUID \\r | |
29 | { \\r | |
30 | 0xf3e4543d, 0xcf35, 0x6cef, {0x35, 0xc4, 0x4f, 0xe6, 0x34, 0x4d, 0xfc, 0x54 } \\r | |
31 | }\r | |
32 | \r | |
33 | //\r | |
34 | // Forward reference for pure ANSI compatability\r | |
35 | //\r | |
36 | typedef struct _EFI_FORM_CALLBACK_PROTOCOL EFI_FORM_CALLBACK_PROTOCOL;\r | |
37 | \r | |
38 | ///\r | |
39 | /// Inconsistent with specification here:\r | |
40 | /// RESET_REQUIRED, EXIT_REQUIRED, SAVE_REQUIRED, NV_CHANGED and NV_NOT_CHANGED are not\r | |
41 | /// defined in HII specification. These Flags of EFI_IFR_DATA_ENTRY should be defined\r | |
42 | /// to describe the standard behavior of the browser after the callback.\r | |
43 | ///\r | |
44 | /// If this flag is set, the browser will exit and reset after processing callback results.\r | |
45 | ///\r | |
46 | #define RESET_REQUIRED 1\r | |
47 | ///\r | |
48 | /// If this flag is set, the browser will exit after processing callback results.\r | |
49 | ///\r | |
50 | #define EXIT_REQUIRED 2\r | |
51 | ///\r | |
52 | /// If this flag is set, the browser will save the NV data after processing callback results.\r | |
53 | ///\r | |
54 | #define SAVE_REQUIRED 4\r | |
55 | ///\r | |
56 | /// If this flag is set, the browser will turn the NV flag on after processing callback results.\r | |
57 | ///\r | |
58 | #define NV_CHANGED 8\r | |
59 | ///\r | |
60 | /// If this flag is set, the browser will turn the NV flag off after processing callback results.\r | |
61 | ///\r | |
62 | #define NV_NOT_CHANGED 16\r | |
63 | \r | |
64 | #pragma pack(1)\r | |
65 | typedef struct {\r | |
66 | UINT8 OpCode; ///< Likely a string, numeric, or one-of\r | |
67 | UINT8 Length; ///< Length of the EFI_IFR_DATA_ENTRY packet.\r | |
68 | UINT16 Flags; ///< Flags settings to determine what behavior is desired from the browser after the callback.\r | |
69 | VOID *Data; ///< The data in the form based on the op-code type. This is not a pointer to the data; the data follows immediately.\r | |
70 | ///\r | |
71 | /// If the OpCode is a OneOf or Numeric type - Data is a UINT16 value.\r | |
72 | /// If the OpCode is a String type - Data is a CHAR16[x] type.\r | |
73 | /// If the OpCode is a Checkbox type - Data is a UINT8 value.\r | |
74 | /// If the OpCode is a NV Access type - Data is a EFI_IFR_NV_DATA structure.\r | |
75 | ///\r | |
76 | } EFI_IFR_DATA_ENTRY;\r | |
77 | \r | |
78 | typedef struct {\r | |
79 | VOID *NvRamMap; ///< If the flag of the op-code specified retrieval of a copy of the NVRAM map.\r | |
80 | //\r | |
81 | // this is a pointer to a buffer copy\r | |
82 | //\r | |
83 | UINT32 EntryCount; ///< Number of EFI_IFR_DATA_ENTRY entries.\r | |
84 | //\r | |
85 | // EFI_IFR_DATA_ENTRY Data[1]; // The in-line Data entries.\r | |
86 | //\r | |
87 | } EFI_IFR_DATA_ARRAY;\r | |
88 | \r | |
89 | \r | |
90 | typedef union {\r | |
91 | EFI_IFR_DATA_ARRAY DataArray; ///< Primarily used by those that call back to their drivers and use HII as a repository.\r | |
92 | EFI_IFR_PACKET DataPacket; ///< Primarily used by those that do not use HII as a repository.\r | |
93 | CHAR16 String[1]; ///< If returning an error - fill the string with null-terminated contents.\r | |
94 | } EFI_HII_CALLBACK_PACKET;\r | |
95 | \r | |
96 | typedef struct {\r | |
97 | FRAMEWORK_EFI_IFR_OP_HEADER Header;\r | |
98 | UINT16 QuestionId; ///< Offset into the map.\r | |
99 | UINT8 StorageWidth; ///< Width of the value.\r | |
100 | //\r | |
101 | // CHAR8 Data[1]; // The Data itself\r | |
102 | //\r | |
103 | } EFI_IFR_NV_DATA;\r | |
104 | \r | |
105 | #pragma pack()\r | |
106 | //\r | |
107 | // The following types are currently defined:\r | |
108 | //\r | |
109 | /**\r | |
110 | Returns the value of a variable.\r | |
111 | \r | |
112 | @param This A pointer to the EFI_FORM_CALLBACK_PROTOCOL instance.\r | |
113 | @param VariableName A NULL-terminated Unicode string that is the\r | |
114 | name of the vendor's variable.\r | |
115 | @param VendorGuid A unique identifier for the vendor.\r | |
116 | @param Attributes If not NULL, a pointer to the memory location to\r | |
117 | return the attribute's bit-mask for the variable.\r | |
118 | @param DataSize The size in bytes of the Buffer. A size of zero causes\r | |
119 | the variable to be deleted.\r | |
120 | @param Buffer The buffer to return the contents of the variable.\r | |
121 | \r | |
122 | @retval EFI_SUCCESS The function completed successfully.\r | |
123 | @retval EFI_NOT_FOUND The variable was not found.\r | |
124 | @retval EFI_BUFFER_TOO_SMALL The DataSize is too small for the result.\r | |
125 | DataSize has been updated with the size needed to complete the request.\r | |
126 | @retval EFI_INVALID_PARAMETER One of the parameters has an invalid value.\r | |
127 | @retval EFI_DEVICE_ERROR The variable could not be saved due to a hardware failure.\r | |
128 | \r | |
129 | **/\r | |
130 | typedef\r | |
131 | EFI_STATUS\r | |
132 | (EFIAPI *EFI_NV_READ)(\r | |
133 | IN EFI_FORM_CALLBACK_PROTOCOL *This,\r | |
134 | IN CHAR16 *VariableName,\r | |
135 | IN EFI_GUID *VendorGuid,\r | |
136 | OUT UINT32 *Attributes OPTIONAL,\r | |
137 | IN OUT UINTN *DataSize,\r | |
138 | OUT VOID *Buffer\r | |
139 | );\r | |
140 | \r | |
141 | /**\r | |
142 | Sets the value of a variable.\r | |
143 | \r | |
144 | @param This A pointer to the EFI_FORM_CALLBACK_PROTOCOL instance.\r | |
145 | @param VariableName A NULL-terminated Unicode string that is the\r | |
146 | name of the vendor's variable. Each VariableName\r | |
147 | is unique for each VendorGuid.\r | |
148 | @param VendorGuid A unique identifier for the vendor.\r | |
149 | @param Attributes Attributes bit-mask to set for the variable.\r | |
150 | Inconsistent with specification here:\r | |
151 | Attributes data type has been changed from\r | |
152 | UINT32 * to UINT32, because the input parameter is\r | |
153 | not necessary to use a pointer date type.\r | |
154 | @param DataSize The size in bytes of the Buffer. A size of zero causes\r | |
155 | the variable to be deleted.\r | |
156 | @param Buffer The buffer containing the contents of the variable.\r | |
157 | @param ResetRequired Returns a value from the driver that abstracts this\r | |
158 | information and will enable a system to know if a\r | |
159 | system reset is required to achieve the configuration\r | |
160 | changes being enabled through this function.\r | |
161 | \r | |
162 | @retval EFI_SUCCESS The firmware has successfully stored the variable and\r | |
163 | its data as defined by the Attributes.\r | |
164 | @retval EFI_OUT_OF_RESOURCES Not enough storage is available to hold\r | |
165 | the variable and its data.\r | |
166 | @retval EFI_INVALID_PARAMETER An invalid combination of Attributes bits\r | |
167 | was supplied, or the DataSize exceeds the maximum allowed.\r | |
168 | @retval EFI_DEVICE_ERROR The variable could not be saved due to a hardware failure.\r | |
169 | \r | |
170 | **/\r | |
171 | typedef\r | |
172 | EFI_STATUS\r | |
173 | (EFIAPI *EFI_NV_WRITE)(\r | |
174 | IN EFI_FORM_CALLBACK_PROTOCOL *This,\r | |
175 | IN CHAR16 *VariableName,\r | |
176 | IN EFI_GUID *VendorGuid,\r | |
177 | IN UINT32 Attributes,\r | |
178 | IN UINTN DataSize,\r | |
179 | IN VOID *Buffer,\r | |
180 | OUT BOOLEAN *ResetRequired\r | |
181 | );\r | |
182 | \r | |
183 | /**\r | |
184 | This function is called to provide results data to the driver.\r | |
185 | \r | |
186 | @param This A pointer to the EFI_FORM_CALLBACK_PROTOCOL instance.\r | |
187 | @param KeyValue A unique value which is sent to the original exporting\r | |
188 | driver so that it can identify the type of data\r | |
189 | to expect. The format of the data tends to vary based\r | |
190 | on the opcode that generated the callback.\r | |
191 | @param Data A pointer to the data being sent to the original exporting driver.\r | |
192 | @param Packet A pointer to a packet of information that a driver passes\r | |
193 | back to the browser.\r | |
194 | \r | |
195 | @return Status Code\r | |
196 | \r | |
197 | **/\r | |
198 | typedef\r | |
199 | EFI_STATUS\r | |
200 | (EFIAPI *EFI_FORM_CALLBACK)(\r | |
201 | IN EFI_FORM_CALLBACK_PROTOCOL *This,\r | |
202 | IN UINT16 KeyValue,\r | |
203 | IN EFI_IFR_DATA_ARRAY *Data,\r | |
204 | OUT EFI_HII_CALLBACK_PACKET **Packet\r | |
205 | );\r | |
206 | \r | |
207 | /**\r | |
208 | The EFI_FORM_CALLBACK_PROTOCOL is the defined interface for access to\r | |
209 | custom NVS devices as well as communication of user selections in a more\r | |
210 | interactive environment. This protocol should be published by platform-specific\r | |
211 | drivers that want to export access to custom hardware storage or publish IFR\r | |
212 | that has a requirement to call back the original driver.\r | |
213 | **/\r | |
214 | struct _EFI_FORM_CALLBACK_PROTOCOL {\r | |
215 | EFI_NV_READ NvRead; ///< The read operation to access the NV data serviced by a hardware-specific driver.\r | |
216 | EFI_NV_WRITE NvWrite; ///< The write operation to access the NV data serviced by a hardware-specific driver.\r | |
217 | EFI_FORM_CALLBACK Callback; ///< The function that is called from the configuration browser to communicate key value pairs.\r | |
218 | };\r | |
219 | \r | |
220 | extern EFI_GUID gEfiFormCallbackProtocolGuid;\r | |
221 | \r | |
222 | #endif\r |