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d007c0a2 | 1 | /** @file\r |
d1102dba LG |
2 | Implementation of reading and writing operations on the NVRAM device\r |
3 | attached to a network interface.\r | |
4 | \r | |
5 | Copyright (c) 2004 - 2018, Intel Corporation. All rights reserved.<BR>\r | |
9d510e61 | 6 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
d007c0a2 | 7 | \r |
d007c0a2 | 8 | **/\r |
9 | \r | |
c28d408d | 10 | #include "Snp.h"\r |
d007c0a2 | 11 | \r |
d007c0a2 | 12 | /**\r |
13 | This routine calls Undi to read the desired number of eeprom bytes.\r | |
14 | \r | |
4cda7726 | 15 | @param Snp pointer to the snp driver structure\r |
16 | @param Offset eeprom register value relative to the base address\r | |
17 | @param BufferSize number of bytes to read\r | |
18 | @param Buffer pointer where to read into\r | |
d007c0a2 | 19 | \r |
f3816027 | 20 | @retval EFI_SUCCESS The NVRAM access was performed.\r |
21 | @retval EFI_INVALID_PARAMETER Invalid UNDI command.\r | |
22 | @retval EFI_UNSUPPORTED Command is not supported by UNDI.\r | |
23 | @retval EFI_DEVICE_ERROR Fail to execute UNDI command.\r | |
d007c0a2 | 24 | \r |
25 | **/\r | |
d007c0a2 | 26 | EFI_STATUS\r |
4cda7726 | 27 | PxeNvDataRead (\r |
d1050b9d MK |
28 | IN SNP_DRIVER *Snp,\r |
29 | IN UINTN Offset,\r | |
30 | IN UINTN BufferSize,\r | |
31 | IN OUT VOID *Buffer\r | |
d007c0a2 | 32 | )\r |
33 | {\r | |
d1050b9d | 34 | PXE_DB_NVDATA *Db;\r |
d007c0a2 | 35 | \r |
d1050b9d MK |
36 | Db = Snp->Db;\r |
37 | Snp->Cdb.OpCode = PXE_OPCODE_NVDATA;\r | |
d007c0a2 | 38 | \r |
d1050b9d | 39 | Snp->Cdb.OpFlags = PXE_OPFLAGS_NVDATA_READ;\r |
d007c0a2 | 40 | \r |
d1050b9d MK |
41 | Snp->Cdb.CPBsize = PXE_CPBSIZE_NOT_USED;\r |
42 | Snp->Cdb.CPBaddr = PXE_CPBADDR_NOT_USED;\r | |
d007c0a2 | 43 | \r |
d1050b9d MK |
44 | Snp->Cdb.DBsize = (UINT16)sizeof (PXE_DB_NVDATA);\r |
45 | Snp->Cdb.DBaddr = (UINT64)(UINTN)Db;\r | |
d007c0a2 | 46 | \r |
d1050b9d MK |
47 | Snp->Cdb.StatCode = PXE_STATCODE_INITIALIZE;\r |
48 | Snp->Cdb.StatFlags = PXE_STATFLAGS_INITIALIZE;\r | |
49 | Snp->Cdb.IFnum = Snp->IfNum;\r | |
50 | Snp->Cdb.Control = PXE_CONTROL_LAST_CDB_IN_LIST;\r | |
d007c0a2 | 51 | \r |
52 | //\r | |
53 | // Issue UNDI command and check result.\r | |
54 | //\r | |
c49ca4a2 | 55 | DEBUG ((DEBUG_NET, "\nsnp->undi.nvdata () "));\r |
d007c0a2 | 56 | \r |
d1050b9d | 57 | (*Snp->IssueUndi32Command)((UINT64)(UINTN)&Snp->Cdb);\r |
d007c0a2 | 58 | \r |
4cda7726 | 59 | switch (Snp->Cdb.StatCode) {\r |
d1050b9d MK |
60 | case PXE_STATCODE_SUCCESS:\r |
61 | break;\r | |
62 | \r | |
63 | case PXE_STATCODE_UNSUPPORTED:\r | |
64 | DEBUG (\r | |
65 | (DEBUG_NET,\r | |
66 | "\nsnp->undi.nvdata() %xh:%xh\n",\r | |
67 | Snp->Cdb.StatFlags,\r | |
68 | Snp->Cdb.StatCode)\r | |
69 | );\r | |
70 | \r | |
71 | return EFI_UNSUPPORTED;\r | |
72 | \r | |
73 | default:\r | |
74 | DEBUG (\r | |
75 | (DEBUG_NET,\r | |
76 | "\nsnp->undi.nvdata() %xh:%xh\n",\r | |
77 | Snp->Cdb.StatFlags,\r | |
78 | Snp->Cdb.StatCode)\r | |
79 | );\r | |
80 | \r | |
81 | return EFI_DEVICE_ERROR;\r | |
d007c0a2 | 82 | }\r |
83 | \r | |
7b0ae7e8 | 84 | ASSERT (Offset < sizeof (Db->Data));\r |
890986ca | 85 | \r |
7b0ae7e8 | 86 | CopyMem (Buffer, &Db->Data.Byte[Offset], BufferSize);\r |
d007c0a2 | 87 | \r |
88 | return EFI_SUCCESS;\r | |
89 | }\r | |
90 | \r | |
d007c0a2 | 91 | /**\r |
d1102dba | 92 | Performs read and write operations on the NVRAM device attached to a network\r |
4cda7726 | 93 | interface.\r |
d1102dba LG |
94 | \r |
95 | This function performs read and write operations on the NVRAM device attached\r | |
4cda7726 | 96 | to a network interface. If ReadWrite is TRUE, a read operation is performed.\r |
d1102dba LG |
97 | If ReadWrite is FALSE, a write operation is performed. Offset specifies the\r |
98 | byte offset at which to start either operation. Offset must be a multiple of\r | |
99 | NvRamAccessSize , and it must have a value between zero and NvRamSize.\r | |
4cda7726 | 100 | BufferSize specifies the length of the read or write operation. BufferSize must\r |
101 | also be a multiple of NvRamAccessSize, and Offset + BufferSize must not exceed\r | |
d1102dba LG |
102 | NvRamSize.\r |
103 | If any of the above conditions is not met, then EFI_INVALID_PARAMETER will be\r | |
104 | returned.\r | |
105 | If all the conditions are met and the operation is "read," the NVRAM device\r | |
106 | attached to the network interface will be read into Buffer and EFI_SUCCESS\r | |
4cda7726 | 107 | will be returned. If this is a write operation, the contents of Buffer will be\r |
d1102dba | 108 | used to update the contents of the NVRAM device attached to the network\r |
4cda7726 | 109 | interface and EFI_SUCCESS will be returned.\r |
d1102dba | 110 | \r |
d007c0a2 | 111 | It does the basic checking on the input parameters and retrieves snp structure\r |
112 | and then calls the read_nvdata() call which does the actual reading\r | |
113 | \r | |
4cda7726 | 114 | @param This A pointer to the EFI_SIMPLE_NETWORK_PROTOCOL instance.\r |
115 | @param ReadWrite TRUE for read operations, FALSE for write operations.\r | |
d1102dba LG |
116 | @param Offset Byte offset in the NVRAM device at which to start the read or\r |
117 | write operation. This must be a multiple of NvRamAccessSize\r | |
118 | and less than NvRamSize. (See EFI_SIMPLE_NETWORK_MODE)\r | |
119 | @param BufferSize The number of bytes to read or write from the NVRAM device.\r | |
4cda7726 | 120 | This must also be a multiple of NvramAccessSize.\r |
121 | @param Buffer A pointer to the data buffer.\r | |
122 | \r | |
123 | @retval EFI_SUCCESS The NVRAM access was performed.\r | |
124 | @retval EFI_NOT_STARTED The network interface has not been started.\r | |
125 | @retval EFI_INVALID_PARAMETER One or more of the following conditions is TRUE:\r | |
d1102dba LG |
126 | * The This parameter is NULL\r |
127 | * The This parameter does not point to a valid\r | |
4cda7726 | 128 | EFI_SIMPLE_NETWORK_PROTOCOL structure\r |
d1102dba | 129 | * The Offset parameter is not a multiple of\r |
4cda7726 | 130 | EFI_SIMPLE_NETWORK_MODE.NvRamAccessSize\r |
d1102dba | 131 | * The Offset parameter is not less than\r |
4cda7726 | 132 | EFI_SIMPLE_NETWORK_MODE.NvRamSize\r |
d1102dba | 133 | * The BufferSize parameter is not a multiple of\r |
4cda7726 | 134 | EFI_SIMPLE_NETWORK_MODE.NvRamAccessSize\r |
135 | * The Buffer parameter is NULL\r | |
d1102dba | 136 | @retval EFI_DEVICE_ERROR The command could not be sent to the network\r |
4cda7726 | 137 | interface.\r |
138 | @retval EFI_UNSUPPORTED This function is not supported by the network\r | |
139 | interface.\r | |
d007c0a2 | 140 | \r |
141 | **/\r | |
142 | EFI_STATUS\r | |
143 | EFIAPI\r | |
4cda7726 | 144 | SnpUndi32NvData (\r |
d1050b9d MK |
145 | IN EFI_SIMPLE_NETWORK_PROTOCOL *This,\r |
146 | IN BOOLEAN ReadWrite,\r | |
147 | IN UINTN Offset,\r | |
148 | IN UINTN BufferSize,\r | |
149 | IN OUT VOID *Buffer\r | |
d007c0a2 | 150 | )\r |
151 | {\r | |
4cda7726 | 152 | SNP_DRIVER *Snp;\r |
d007c0a2 | 153 | EFI_TPL OldTpl;\r |
154 | EFI_STATUS Status;\r | |
155 | \r | |
156 | //\r | |
157 | // Get pointer to SNP driver instance for *this.\r | |
158 | //\r | |
4cda7726 | 159 | if (This == NULL) {\r |
d007c0a2 | 160 | return EFI_INVALID_PARAMETER;\r |
161 | }\r | |
162 | \r | |
4cda7726 | 163 | Snp = EFI_SIMPLE_NETWORK_DEV_FROM_THIS (This);\r |
d007c0a2 | 164 | \r |
165 | OldTpl = gBS->RaiseTPL (TPL_CALLBACK);\r | |
166 | \r | |
167 | //\r | |
168 | // Return error if the SNP is not initialized.\r | |
169 | //\r | |
4cda7726 | 170 | switch (Snp->Mode.State) {\r |
d1050b9d MK |
171 | case EfiSimpleNetworkInitialized:\r |
172 | break;\r | |
d007c0a2 | 173 | \r |
d1050b9d MK |
174 | case EfiSimpleNetworkStopped:\r |
175 | Status = EFI_NOT_STARTED;\r | |
176 | goto ON_EXIT;\r | |
d007c0a2 | 177 | \r |
d1050b9d MK |
178 | default:\r |
179 | Status = EFI_DEVICE_ERROR;\r | |
180 | goto ON_EXIT;\r | |
d007c0a2 | 181 | }\r |
d1050b9d | 182 | \r |
d007c0a2 | 183 | //\r |
184 | // Return error if non-volatile memory variables are not valid.\r | |
185 | //\r | |
d1050b9d | 186 | if ((Snp->Mode.NvRamSize == 0) || (Snp->Mode.NvRamAccessSize == 0)) {\r |
d007c0a2 | 187 | Status = EFI_UNSUPPORTED;\r |
188 | goto ON_EXIT;\r | |
189 | }\r | |
d1050b9d | 190 | \r |
d007c0a2 | 191 | //\r |
192 | // Check for invalid parameter combinations.\r | |
193 | //\r | |
4cda7726 | 194 | if ((BufferSize == 0) ||\r |
195 | (Buffer == NULL) ||\r | |
196 | (Offset >= Snp->Mode.NvRamSize) ||\r | |
197 | (Offset + BufferSize > Snp->Mode.NvRamSize) ||\r | |
198 | (BufferSize % Snp->Mode.NvRamAccessSize != 0) ||\r | |
199 | (Offset % Snp->Mode.NvRamAccessSize != 0)\r | |
d1050b9d MK |
200 | )\r |
201 | {\r | |
d007c0a2 | 202 | Status = EFI_INVALID_PARAMETER;\r |
203 | goto ON_EXIT;\r | |
204 | }\r | |
d1050b9d | 205 | \r |
d007c0a2 | 206 | //\r |
207 | // check the implementation flags of undi if we can write the nvdata!\r | |
208 | //\r | |
4cda7726 | 209 | if (!ReadWrite) {\r |
d007c0a2 | 210 | Status = EFI_UNSUPPORTED;\r |
211 | } else {\r | |
4cda7726 | 212 | Status = PxeNvDataRead (Snp, Offset, BufferSize, Buffer);\r |
d007c0a2 | 213 | }\r |
214 | \r | |
215 | ON_EXIT:\r | |
216 | gBS->RestoreTPL (OldTpl);\r | |
217 | \r | |
218 | return Status;\r | |
219 | }\r |