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20752cb8 HW |
1 | /** @file\r |
2 | The driver entry point for RamDiskDxe driver.\r | |
3 | \r | |
4 | Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>\r | |
9d510e61 | 5 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
20752cb8 HW |
6 | \r |
7 | **/\r | |
8 | \r | |
9 | #include "RamDiskImpl.h"\r | |
10 | \r | |
11 | //\r | |
12 | // Handle for the EFI_RAM_DISK_PROTOCOL instance\r | |
13 | //\r | |
14 | EFI_HANDLE mRamDiskHandle = NULL;\r | |
15 | \r | |
16 | //\r | |
17 | // The EFI_RAM_DISK_PROTOCOL instances that is installed onto the driver\r | |
18 | // handle\r | |
19 | //\r | |
20 | EFI_RAM_DISK_PROTOCOL mRamDiskProtocol = {\r | |
21 | RamDiskRegister,\r | |
22 | RamDiskUnregister\r | |
23 | };\r | |
24 | \r | |
25 | //\r | |
26 | // RamDiskDxe driver maintains a list of registered RAM disks.\r | |
27 | //\r | |
28 | LIST_ENTRY RegisteredRamDisks;\r | |
20752cb8 | 29 | \r |
07a3fecd HW |
30 | //\r |
31 | // Pointers to the EFI_ACPI_TABLE_PROTOCOL and EFI_ACPI_SDT_PROTOCOL.\r | |
32 | //\r | |
33 | EFI_ACPI_TABLE_PROTOCOL *mAcpiTableProtocol = NULL;\r | |
34 | EFI_ACPI_SDT_PROTOCOL *mAcpiSdtProtocol = NULL;\r | |
35 | \r | |
36 | \r | |
37 | /**\r | |
38 | Check whether EFI_ACPI_TABLE_PROTOCOL and EFI_ACPI_SDT_PROTOCOL are produced.\r | |
39 | If both protocols are produced, publish all the reserved memory type RAM\r | |
40 | disks to the NVDIMM Firmware Interface Table (NFIT).\r | |
41 | \r | |
42 | @param[in] Event Event whose notification function is being invoked.\r | |
43 | @param[in] Context The pointer to the notification function's context,\r | |
44 | which is implementation-dependent.\r | |
45 | \r | |
46 | **/\r | |
47 | VOID\r | |
48 | EFIAPI\r | |
49 | RamDiskAcpiCheck (\r | |
50 | IN EFI_EVENT Event,\r | |
51 | IN VOID *Context\r | |
52 | )\r | |
53 | {\r | |
54 | EFI_STATUS Status;\r | |
55 | LIST_ENTRY *Entry;\r | |
56 | RAM_DISK_PRIVATE_DATA *PrivateData;\r | |
57 | \r | |
58 | gBS->CloseEvent (Event);\r | |
59 | \r | |
60 | //\r | |
61 | // Locate the EFI_ACPI_TABLE_PROTOCOL.\r | |
62 | //\r | |
63 | Status = gBS->LocateProtocol (\r | |
64 | &gEfiAcpiTableProtocolGuid,\r | |
65 | NULL,\r | |
66 | (VOID **)&mAcpiTableProtocol\r | |
67 | );\r | |
68 | if (EFI_ERROR (Status)) {\r | |
69 | DEBUG ((\r | |
70 | EFI_D_INFO,\r | |
76874be3 | 71 | "RamDiskAcpiCheck: Cannot locate the EFI ACPI Table Protocol, "\r |
07a3fecd HW |
72 | "unable to publish RAM disks to NFIT.\n"\r |
73 | ));\r | |
74 | return;\r | |
75 | }\r | |
76 | \r | |
77 | //\r | |
78 | // Locate the EFI_ACPI_SDT_PROTOCOL.\r | |
79 | //\r | |
80 | Status = gBS->LocateProtocol (\r | |
81 | &gEfiAcpiSdtProtocolGuid,\r | |
82 | NULL,\r | |
83 | (VOID **)&mAcpiSdtProtocol\r | |
84 | );\r | |
85 | if (EFI_ERROR (Status)) {\r | |
86 | DEBUG ((\r | |
87 | EFI_D_INFO,\r | |
76874be3 | 88 | "RamDiskAcpiCheck: Cannot locate the EFI ACPI Sdt Protocol, "\r |
07a3fecd HW |
89 | "unable to publish RAM disks to NFIT.\n"\r |
90 | ));\r | |
91 | mAcpiTableProtocol = NULL;\r | |
92 | return;\r | |
93 | }\r | |
94 | \r | |
95 | EFI_LIST_FOR_EACH (Entry, &RegisteredRamDisks) {\r | |
96 | PrivateData = RAM_DISK_PRIVATE_FROM_THIS (Entry);\r | |
97 | RamDiskPublishNfit (PrivateData);\r | |
98 | }\r | |
99 | }\r | |
100 | \r | |
20752cb8 HW |
101 | \r |
102 | /**\r | |
103 | The entry point for RamDiskDxe driver.\r | |
104 | \r | |
105 | @param[in] ImageHandle The image handle of the driver.\r | |
106 | @param[in] SystemTable The system table.\r | |
107 | \r | |
108 | @retval EFI_ALREADY_STARTED The driver already exists in system.\r | |
109 | @retval EFI_OUT_OF_RESOURCES Fail to execute entry point due to lack of\r | |
110 | resources.\r | |
111 | @retval EFI_SUCCES All the related protocols are installed on\r | |
112 | the driver.\r | |
113 | \r | |
114 | **/\r | |
115 | EFI_STATUS\r | |
116 | EFIAPI\r | |
117 | RamDiskDxeEntryPoint (\r | |
118 | IN EFI_HANDLE ImageHandle,\r | |
119 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
120 | )\r | |
121 | {\r | |
122 | EFI_STATUS Status;\r | |
123 | RAM_DISK_CONFIG_PRIVATE_DATA *ConfigPrivate;\r | |
124 | VOID *DummyInterface;\r | |
07a3fecd | 125 | EFI_EVENT Event;\r |
20752cb8 HW |
126 | \r |
127 | //\r | |
128 | // If already started, return.\r | |
129 | //\r | |
130 | Status = gBS->LocateProtocol (\r | |
131 | &gEfiRamDiskProtocolGuid,\r | |
132 | NULL,\r | |
133 | &DummyInterface\r | |
134 | );\r | |
135 | if (!EFI_ERROR (Status)) {\r | |
136 | DEBUG ((EFI_D_INFO, "Driver already started!\n"));\r | |
137 | return EFI_ALREADY_STARTED;\r | |
138 | }\r | |
139 | \r | |
140 | //\r | |
141 | // Create a private data structure.\r | |
142 | //\r | |
143 | ConfigPrivate = AllocateCopyPool (sizeof (RAM_DISK_CONFIG_PRIVATE_DATA), &mRamDiskConfigPrivateDataTemplate);\r | |
144 | if (ConfigPrivate == NULL) {\r | |
145 | return EFI_OUT_OF_RESOURCES;\r | |
146 | }\r | |
147 | \r | |
148 | //\r | |
149 | // Install RAM disk configuration form\r | |
150 | //\r | |
151 | Status = InstallRamDiskConfigForm (ConfigPrivate);\r | |
152 | if (EFI_ERROR (Status)) {\r | |
153 | goto ErrorExit;\r | |
154 | }\r | |
155 | \r | |
156 | //\r | |
157 | // Install the EFI_RAM_DISK_PROTOCOL and RAM disk private data onto a\r | |
158 | // new handle\r | |
159 | //\r | |
160 | Status = gBS->InstallMultipleProtocolInterfaces (\r | |
161 | &mRamDiskHandle,\r | |
162 | &gEfiRamDiskProtocolGuid,\r | |
163 | &mRamDiskProtocol,\r | |
164 | &gEfiCallerIdGuid,\r | |
165 | ConfigPrivate,\r | |
166 | NULL\r | |
167 | );\r | |
168 | if (EFI_ERROR (Status)) {\r | |
169 | goto ErrorExit;\r | |
170 | }\r | |
171 | \r | |
172 | //\r | |
173 | // Initialize the list of registered RAM disks maintained by the driver\r | |
174 | //\r | |
175 | InitializeListHead (&RegisteredRamDisks);\r | |
176 | \r | |
07a3fecd HW |
177 | Status = EfiCreateEventReadyToBootEx (\r |
178 | TPL_CALLBACK,\r | |
179 | RamDiskAcpiCheck,\r | |
180 | NULL,\r | |
181 | &Event\r | |
182 | );\r | |
183 | ASSERT_EFI_ERROR (Status);\r | |
184 | \r | |
20752cb8 HW |
185 | return EFI_SUCCESS;\r |
186 | \r | |
187 | ErrorExit:\r | |
188 | if (ConfigPrivate != NULL) {\r | |
189 | UninstallRamDiskConfigForm (ConfigPrivate);\r | |
190 | }\r | |
191 | \r | |
192 | return Status;\r | |
193 | }\r | |
194 | \r | |
195 | \r | |
196 | /**\r | |
197 | Unload the RamDiskDxe driver and its configuration form.\r | |
198 | \r | |
199 | @param[in] ImageHandle The driver's image handle.\r | |
200 | \r | |
201 | @retval EFI_SUCCESS The RamDiskDxe driver and its configuration\r | |
202 | form is unloaded.\r | |
203 | @retval Others Failed to unload the form.\r | |
204 | \r | |
205 | **/\r | |
206 | EFI_STATUS\r | |
207 | EFIAPI\r | |
208 | RamDiskDxeUnload (\r | |
209 | IN EFI_HANDLE ImageHandle\r | |
210 | )\r | |
211 | {\r | |
212 | EFI_STATUS Status;\r | |
213 | RAM_DISK_CONFIG_PRIVATE_DATA *ConfigPrivate;\r | |
214 | \r | |
215 | Status = gBS->HandleProtocol (\r | |
216 | mRamDiskHandle,\r | |
217 | &gEfiCallerIdGuid,\r | |
218 | (VOID **) &ConfigPrivate\r | |
219 | );\r | |
220 | if (EFI_ERROR (Status)) {\r | |
221 | return Status;\r | |
222 | }\r | |
223 | \r | |
224 | ASSERT (ConfigPrivate->Signature == RAM_DISK_CONFIG_PRIVATE_DATA_SIGNATURE);\r | |
225 | \r | |
226 | //\r | |
227 | // Unregister all registered RAM disks\r | |
228 | //\r | |
229 | UnregisterAllRamDisks ();\r | |
230 | \r | |
231 | gBS->UninstallMultipleProtocolInterfaces (\r | |
232 | mRamDiskHandle,\r | |
233 | &gEfiRamDiskProtocolGuid,\r | |
234 | &mRamDiskProtocol,\r | |
235 | &gEfiCallerIdGuid,\r | |
236 | ConfigPrivate,\r | |
237 | NULL\r | |
238 | );\r | |
239 | \r | |
240 | UninstallRamDiskConfigForm (ConfigPrivate);\r | |
241 | \r | |
242 | return EFI_SUCCESS;\r | |
243 | }\r |