]>
Commit | Line | Data |
---|---|---|
2e15b750 HW |
1 | /** @file\r |
2 | The device path help function.\r | |
3 | \r | |
4 | Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>\r | |
5 | \r | |
9d510e61 | 6 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
2e15b750 HW |
7 | \r |
8 | **/\r | |
9 | \r | |
10 | #include "NvmExpressPei.h"\r | |
11 | \r | |
12 | //\r | |
13 | // Template for an Nvm Express Device Path node\r | |
14 | //\r | |
15 | NVME_NAMESPACE_DEVICE_PATH mNvmeDevicePathNodeTemplate = {\r | |
16 | { // Header\r | |
17 | MESSAGING_DEVICE_PATH,\r | |
18 | MSG_NVME_NAMESPACE_DP,\r | |
19 | {\r | |
1436aea4 MK |
20 | (UINT8)(sizeof (NVME_NAMESPACE_DEVICE_PATH)),\r |
21 | (UINT8)((sizeof (NVME_NAMESPACE_DEVICE_PATH)) >> 8)\r | |
2e15b750 HW |
22 | }\r |
23 | },\r | |
24 | 0x0, // NamespaceId\r | |
25 | 0x0 // NamespaceUuid\r | |
26 | };\r | |
27 | \r | |
28 | //\r | |
29 | // Template for an End of entire Device Path node\r | |
30 | //\r | |
31 | EFI_DEVICE_PATH_PROTOCOL mNvmeEndDevicePathNodeTemplate = {\r | |
32 | END_DEVICE_PATH_TYPE,\r | |
33 | END_ENTIRE_DEVICE_PATH_SUBTYPE,\r | |
34 | {\r | |
1436aea4 MK |
35 | (UINT8)(sizeof (EFI_DEVICE_PATH_PROTOCOL)),\r |
36 | (UINT8)((sizeof (EFI_DEVICE_PATH_PROTOCOL)) >> 8)\r | |
2e15b750 HW |
37 | }\r |
38 | };\r | |
39 | \r | |
05fd2a92 HW |
40 | /**\r |
41 | Get the size of the current device path instance.\r | |
42 | \r | |
43 | @param[in] DevicePath A pointer to the EFI_DEVICE_PATH_PROTOCOL\r | |
44 | structure.\r | |
45 | @param[out] InstanceSize The size of the current device path instance.\r | |
46 | @param[out] EntireDevicePathEnd Indicate whether the instance is the last\r | |
47 | one in the device path strucure.\r | |
48 | \r | |
49 | @retval EFI_SUCCESS The size of the current device path instance is fetched.\r | |
50 | @retval Others Fails to get the size of the current device path instance.\r | |
51 | \r | |
52 | **/\r | |
53 | EFI_STATUS\r | |
54 | GetDevicePathInstanceSize (\r | |
1436aea4 MK |
55 | IN EFI_DEVICE_PATH_PROTOCOL *DevicePath,\r |
56 | OUT UINTN *InstanceSize,\r | |
57 | OUT BOOLEAN *EntireDevicePathEnd\r | |
05fd2a92 HW |
58 | )\r |
59 | {\r | |
1436aea4 | 60 | EFI_DEVICE_PATH_PROTOCOL *Walker;\r |
05fd2a92 | 61 | \r |
1436aea4 | 62 | if ((DevicePath == NULL) || (InstanceSize == NULL) || (EntireDevicePathEnd == NULL)) {\r |
05fd2a92 HW |
63 | return EFI_INVALID_PARAMETER;\r |
64 | }\r | |
65 | \r | |
66 | //\r | |
67 | // Find the end of the device path instance\r | |
68 | //\r | |
69 | Walker = DevicePath;\r | |
70 | while (Walker->Type != END_DEVICE_PATH_TYPE) {\r | |
71 | Walker = NextDevicePathNode (Walker);\r | |
72 | }\r | |
73 | \r | |
74 | //\r | |
75 | // Check if 'Walker' points to the end of an entire device path\r | |
76 | //\r | |
77 | if (Walker->SubType == END_ENTIRE_DEVICE_PATH_SUBTYPE) {\r | |
78 | *EntireDevicePathEnd = TRUE;\r | |
79 | } else if (Walker->SubType == END_INSTANCE_DEVICE_PATH_SUBTYPE) {\r | |
80 | *EntireDevicePathEnd = FALSE;\r | |
81 | } else {\r | |
82 | return EFI_INVALID_PARAMETER;\r | |
83 | }\r | |
84 | \r | |
85 | //\r | |
86 | // Compute the size of the device path instance\r | |
87 | //\r | |
1436aea4 | 88 | *InstanceSize = ((UINTN)Walker - (UINTN)(DevicePath)) + sizeof (EFI_DEVICE_PATH_PROTOCOL);\r |
05fd2a92 HW |
89 | \r |
90 | return EFI_SUCCESS;\r | |
91 | }\r | |
92 | \r | |
2e15b750 HW |
93 | /**\r |
94 | Check the validity of the device path of a NVM Express host controller.\r | |
95 | \r | |
96 | @param[in] DevicePath A pointer to the EFI_DEVICE_PATH_PROTOCOL\r | |
97 | structure.\r | |
98 | @param[in] DevicePathLength The length of the device path.\r | |
99 | \r | |
100 | @retval EFI_SUCCESS The device path is valid.\r | |
101 | @retval EFI_INVALID_PARAMETER The device path is invalid.\r | |
102 | \r | |
103 | **/\r | |
104 | EFI_STATUS\r | |
105 | NvmeIsHcDevicePathValid (\r | |
1436aea4 MK |
106 | IN EFI_DEVICE_PATH_PROTOCOL *DevicePath,\r |
107 | IN UINTN DevicePathLength\r | |
2e15b750 HW |
108 | )\r |
109 | {\r | |
1436aea4 MK |
110 | EFI_DEVICE_PATH_PROTOCOL *Start;\r |
111 | UINTN Size;\r | |
2e15b750 HW |
112 | \r |
113 | if (DevicePath == NULL) {\r | |
114 | return EFI_INVALID_PARAMETER;\r | |
115 | }\r | |
116 | \r | |
117 | //\r | |
118 | // Validate the DevicePathLength is big enough to touch the first node.\r | |
119 | //\r | |
120 | if (DevicePathLength < sizeof (EFI_DEVICE_PATH_PROTOCOL)) {\r | |
121 | return EFI_INVALID_PARAMETER;\r | |
122 | }\r | |
123 | \r | |
124 | Start = DevicePath;\r | |
125 | while (!(DevicePath->Type == END_DEVICE_PATH_TYPE &&\r | |
1436aea4 MK |
126 | DevicePath->SubType == END_ENTIRE_DEVICE_PATH_SUBTYPE))\r |
127 | {\r | |
2e15b750 HW |
128 | DevicePath = NextDevicePathNode (DevicePath);\r |
129 | \r | |
130 | //\r | |
131 | // Prevent overflow and invalid zero in the 'Length' field of a device path\r | |
132 | // node.\r | |
133 | //\r | |
1436aea4 | 134 | if ((UINTN)DevicePath <= (UINTN)Start) {\r |
2e15b750 HW |
135 | return EFI_INVALID_PARAMETER;\r |
136 | }\r | |
137 | \r | |
138 | //\r | |
139 | // Prevent touching memory beyond given DevicePathLength.\r | |
140 | //\r | |
1436aea4 MK |
141 | if ((UINTN)DevicePath - (UINTN)Start >\r |
142 | DevicePathLength - sizeof (EFI_DEVICE_PATH_PROTOCOL))\r | |
143 | {\r | |
2e15b750 HW |
144 | return EFI_INVALID_PARAMETER;\r |
145 | }\r | |
146 | }\r | |
147 | \r | |
148 | //\r | |
149 | // Check if the device path and its size match exactly with each other.\r | |
150 | //\r | |
1436aea4 | 151 | Size = ((UINTN)DevicePath - (UINTN)Start) + sizeof (EFI_DEVICE_PATH_PROTOCOL);\r |
2e15b750 HW |
152 | if (Size != DevicePathLength) {\r |
153 | return EFI_INVALID_PARAMETER;\r | |
154 | }\r | |
155 | \r | |
156 | return EFI_SUCCESS;\r | |
157 | }\r | |
158 | \r | |
159 | /**\r | |
160 | Build the device path for an Nvm Express device with given namespace identifier\r | |
161 | and namespace extended unique identifier.\r | |
162 | \r | |
163 | @param[in] Private A pointer to the PEI_NVME_CONTROLLER_PRIVATE_DATA\r | |
164 | data structure.\r | |
165 | @param[in] NamespaceId The given namespace identifier.\r | |
166 | @param[in] NamespaceUuid The given namespace extended unique identifier.\r | |
167 | @param[out] DevicePathLength The length of the device path in bytes specified\r | |
168 | by DevicePath.\r | |
169 | @param[out] DevicePath The device path of Nvm Express device.\r | |
170 | \r | |
171 | @retval EFI_SUCCESS The operation succeeds.\r | |
172 | @retval EFI_INVALID_PARAMETER The parameters are invalid.\r | |
173 | @retval EFI_OUT_OF_RESOURCES The operation fails due to lack of resources.\r | |
174 | \r | |
175 | **/\r | |
176 | EFI_STATUS\r | |
177 | NvmeBuildDevicePath (\r | |
1436aea4 MK |
178 | IN PEI_NVME_CONTROLLER_PRIVATE_DATA *Private,\r |
179 | IN UINT32 NamespaceId,\r | |
180 | IN UINT64 NamespaceUuid,\r | |
181 | OUT UINTN *DevicePathLength,\r | |
182 | OUT EFI_DEVICE_PATH_PROTOCOL **DevicePath\r | |
2e15b750 HW |
183 | )\r |
184 | {\r | |
1436aea4 MK |
185 | EFI_DEVICE_PATH_PROTOCOL *DevicePathWalker;\r |
186 | NVME_NAMESPACE_DEVICE_PATH *NvmeDeviceNode;\r | |
2e15b750 | 187 | \r |
1436aea4 | 188 | if ((DevicePathLength == NULL) || (DevicePath == NULL)) {\r |
2e15b750 HW |
189 | return EFI_INVALID_PARAMETER;\r |
190 | }\r | |
191 | \r | |
192 | *DevicePathLength = Private->DevicePathLength + sizeof (NVME_NAMESPACE_DEVICE_PATH);\r | |
193 | *DevicePath = AllocatePool (*DevicePathLength);\r | |
194 | if (*DevicePath == NULL) {\r | |
195 | *DevicePathLength = 0;\r | |
196 | return EFI_OUT_OF_RESOURCES;\r | |
197 | }\r | |
198 | \r | |
199 | //\r | |
200 | // Construct the host controller part device nodes\r | |
201 | //\r | |
202 | DevicePathWalker = *DevicePath;\r | |
203 | CopyMem (\r | |
204 | DevicePathWalker,\r | |
205 | Private->DevicePath,\r | |
206 | Private->DevicePathLength - sizeof (EFI_DEVICE_PATH_PROTOCOL)\r | |
207 | );\r | |
208 | \r | |
209 | //\r | |
210 | // Construct the Nvm Express device node\r | |
211 | //\r | |
1436aea4 MK |
212 | DevicePathWalker = (EFI_DEVICE_PATH_PROTOCOL *)((UINT8 *)DevicePathWalker +\r |
213 | (Private->DevicePathLength - sizeof (EFI_DEVICE_PATH_PROTOCOL)));\r | |
2e15b750 HW |
214 | CopyMem (\r |
215 | DevicePathWalker,\r | |
216 | &mNvmeDevicePathNodeTemplate,\r | |
217 | sizeof (mNvmeDevicePathNodeTemplate)\r | |
218 | );\r | |
219 | NvmeDeviceNode = (NVME_NAMESPACE_DEVICE_PATH *)DevicePathWalker;\r | |
220 | NvmeDeviceNode->NamespaceId = NamespaceId;\r | |
221 | NvmeDeviceNode->NamespaceUuid = NamespaceUuid;\r | |
222 | \r | |
223 | //\r | |
224 | // Construct the end device node\r | |
225 | //\r | |
1436aea4 MK |
226 | DevicePathWalker = (EFI_DEVICE_PATH_PROTOCOL *)((UINT8 *)DevicePathWalker +\r |
227 | sizeof (NVME_NAMESPACE_DEVICE_PATH));\r | |
2e15b750 HW |
228 | CopyMem (\r |
229 | DevicePathWalker,\r | |
230 | &mNvmeEndDevicePathNodeTemplate,\r | |
231 | sizeof (mNvmeEndDevicePathNodeTemplate)\r | |
232 | );\r | |
233 | \r | |
234 | return EFI_SUCCESS;\r | |
235 | }\r |