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8a67d61d | 1 | /** @file\r |
2 | Copyright (c) 2004, Intel Corporation\r | |
3 | All rights reserved. This program and the accompanying materials\r | |
4 | are licensed and made available under the terms and conditions of the BSD License\r | |
5 | which accompanies this distribution. The full text of the license may be found at\r | |
6 | http://opensource.org/licenses/bsd-license.php\r | |
7 | \r | |
8 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
9 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
10 | \r | |
11 | Module name:\r | |
12 | WaitForPacket.c\r | |
13 | \r | |
14 | Abstract:\r | |
15 | Event handler to check for available packet.\r | |
16 | \r | |
17 | \r | |
18 | **/\r | |
19 | \r | |
20 | #include "Snp.h"\r | |
21 | \r | |
22 | \r | |
23 | /**\r | |
24 | \r | |
25 | \r | |
26 | \r | |
27 | **/\r | |
28 | VOID\r | |
29 | EFIAPI\r | |
30 | SnpWaitForPacketNotify (\r | |
31 | EFI_EVENT Event,\r | |
32 | VOID *SnpPtr\r | |
33 | )\r | |
34 | {\r | |
35 | PXE_DB_GET_STATUS PxeDbGetStatus;\r | |
36 | \r | |
37 | //\r | |
38 | // Do nothing if either parameter is a NULL pointer.\r | |
39 | //\r | |
40 | if (Event == NULL || SnpPtr == NULL) {\r | |
41 | return ;\r | |
42 | }\r | |
43 | //\r | |
44 | // Do nothing if the SNP interface is not initialized.\r | |
45 | //\r | |
46 | switch (((SNP_DRIVER *) SnpPtr)->mode.State) {\r | |
47 | case EfiSimpleNetworkInitialized:\r | |
48 | break;\r | |
49 | \r | |
50 | case EfiSimpleNetworkStopped:\r | |
51 | case EfiSimpleNetworkStarted:\r | |
52 | default:\r | |
53 | return ;\r | |
54 | }\r | |
55 | //\r | |
56 | // Fill in CDB for UNDI GetStatus().\r | |
57 | //\r | |
58 | ((SNP_DRIVER *) SnpPtr)->cdb.OpCode = PXE_OPCODE_GET_STATUS;\r | |
59 | ((SNP_DRIVER *) SnpPtr)->cdb.OpFlags = 0;\r | |
60 | ((SNP_DRIVER *) SnpPtr)->cdb.CPBsize = PXE_CPBSIZE_NOT_USED;\r | |
61 | ((SNP_DRIVER *) SnpPtr)->cdb.CPBaddr = PXE_CPBADDR_NOT_USED;\r | |
62 | ((SNP_DRIVER *) SnpPtr)->cdb.DBsize = sizeof (UINT32) * 2;\r | |
63 | ((SNP_DRIVER *) SnpPtr)->cdb.DBaddr = (UINT64)(UINTN) (((SNP_DRIVER *) SnpPtr)->db);\r | |
64 | ((SNP_DRIVER *) SnpPtr)->cdb.StatCode = PXE_STATCODE_INITIALIZE;\r | |
65 | ((SNP_DRIVER *) SnpPtr)->cdb.StatFlags = PXE_STATFLAGS_INITIALIZE;\r | |
66 | ((SNP_DRIVER *) SnpPtr)->cdb.IFnum = ((SNP_DRIVER *) SnpPtr)->if_num;\r | |
67 | ((SNP_DRIVER *) SnpPtr)->cdb.Control = PXE_CONTROL_LAST_CDB_IN_LIST;\r | |
68 | \r | |
69 | //\r | |
70 | // Clear contents of DB buffer.\r | |
71 | //\r | |
72 | ZeroMem (((SNP_DRIVER *) SnpPtr)->db, sizeof (UINT32) * 2);\r | |
73 | \r | |
74 | //\r | |
75 | // Issue UNDI command and check result.\r | |
76 | //\r | |
77 | (*((SNP_DRIVER *) SnpPtr)->issue_undi32_command) ((UINT64)(UINTN) &((SNP_DRIVER *) SnpPtr)->cdb);\r | |
78 | \r | |
79 | if (((SNP_DRIVER *) SnpPtr)->cdb.StatCode != EFI_SUCCESS) {\r | |
80 | return ;\r | |
81 | }\r | |
82 | //\r | |
83 | // We might have a packet. Check the receive length and signal\r | |
84 | // the event if the length is not zero.\r | |
85 | //\r | |
86 | CopyMem (\r | |
87 | &PxeDbGetStatus,\r | |
88 | ((SNP_DRIVER *) SnpPtr)->db,\r | |
89 | sizeof (UINT32) * 2\r | |
90 | );\r | |
91 | \r | |
92 | if (PxeDbGetStatus.RxFrameLen != 0) {\r | |
93 | gBS->SignalEvent (Event);\r | |
94 | }\r | |
95 | }\r | |
96 | \r | |
97 | /* eof - WaitForPacket.c */\r |