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8a67d61d | 1 | /** @file\r |
4cda7726 | 2 | Event handler to check for available packet.\r |
3 | \r | |
4 | Copyright (c) 2004 - 2008, Intel Corporation. <BR> \r | |
5 | All rights reserved. This program and the accompanying materials are licensed \r | |
6 | and made available under the terms and conditions of the BSD License which \r | |
7 | accompanies this distribution. The full text of the license may be found at \r | |
8 | http://opensource.org/licenses/bsd-license.php \r | |
8a67d61d | 9 | \r |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
12 | \r | |
8a67d61d | 13 | **/\r |
14 | \r | |
15 | #include "Snp.h"\r | |
16 | \r | |
17 | \r | |
18 | /**\r | |
4cda7726 | 19 | Nofication call back function for WaitForPacket event.\r |
8a67d61d | 20 | \r |
4cda7726 | 21 | @param Event EFI Event.\r |
22 | @param SnpPtr Pointer to SNP_DRIVER structure.\r | |
8a67d61d | 23 | \r |
24 | **/\r | |
25 | VOID\r | |
26 | EFIAPI\r | |
27 | SnpWaitForPacketNotify (\r | |
28 | EFI_EVENT Event,\r | |
29 | VOID *SnpPtr\r | |
30 | )\r | |
31 | {\r | |
32 | PXE_DB_GET_STATUS PxeDbGetStatus;\r | |
33 | \r | |
34 | //\r | |
35 | // Do nothing if either parameter is a NULL pointer.\r | |
36 | //\r | |
37 | if (Event == NULL || SnpPtr == NULL) {\r | |
38 | return ;\r | |
39 | }\r | |
40 | //\r | |
41 | // Do nothing if the SNP interface is not initialized.\r | |
42 | //\r | |
4cda7726 | 43 | switch (((SNP_DRIVER *) SnpPtr)->Mode.State) {\r |
8a67d61d | 44 | case EfiSimpleNetworkInitialized:\r |
45 | break;\r | |
46 | \r | |
47 | case EfiSimpleNetworkStopped:\r | |
48 | case EfiSimpleNetworkStarted:\r | |
49 | default:\r | |
50 | return ;\r | |
51 | }\r | |
52 | //\r | |
53 | // Fill in CDB for UNDI GetStatus().\r | |
54 | //\r | |
4cda7726 | 55 | ((SNP_DRIVER *) SnpPtr)->Cdb.OpCode = PXE_OPCODE_GET_STATUS;\r |
56 | ((SNP_DRIVER *) SnpPtr)->Cdb.OpFlags = 0;\r | |
57 | ((SNP_DRIVER *) SnpPtr)->Cdb.CPBsize = PXE_CPBSIZE_NOT_USED;\r | |
58 | ((SNP_DRIVER *) SnpPtr)->Cdb.CPBaddr = PXE_CPBADDR_NOT_USED;\r | |
59 | ((SNP_DRIVER *) SnpPtr)->Cdb.DBsize = sizeof (UINT32) * 2;\r | |
60 | ((SNP_DRIVER *) SnpPtr)->Cdb.DBaddr = (UINT64)(UINTN) (((SNP_DRIVER *) SnpPtr)->Db);\r | |
61 | ((SNP_DRIVER *) SnpPtr)->Cdb.StatCode = PXE_STATCODE_INITIALIZE;\r | |
62 | ((SNP_DRIVER *) SnpPtr)->Cdb.StatFlags = PXE_STATFLAGS_INITIALIZE;\r | |
63 | ((SNP_DRIVER *) SnpPtr)->Cdb.IFnum = ((SNP_DRIVER *) SnpPtr)->IfNum;\r | |
64 | ((SNP_DRIVER *) SnpPtr)->Cdb.Control = PXE_CONTROL_LAST_CDB_IN_LIST;\r | |
8a67d61d | 65 | \r |
66 | //\r | |
67 | // Clear contents of DB buffer.\r | |
68 | //\r | |
4cda7726 | 69 | ZeroMem (((SNP_DRIVER *) SnpPtr)->Db, sizeof (UINT32) * 2);\r |
8a67d61d | 70 | \r |
71 | //\r | |
72 | // Issue UNDI command and check result.\r | |
73 | //\r | |
4cda7726 | 74 | (*((SNP_DRIVER *) SnpPtr)->IssueUndi32Command) ((UINT64)(UINTN) &((SNP_DRIVER *) SnpPtr)->Cdb);\r |
8a67d61d | 75 | \r |
4cda7726 | 76 | if (((SNP_DRIVER *) SnpPtr)->Cdb.StatCode != EFI_SUCCESS) {\r |
8a67d61d | 77 | return ;\r |
78 | }\r | |
79 | //\r | |
80 | // We might have a packet. Check the receive length and signal\r | |
81 | // the event if the length is not zero.\r | |
82 | //\r | |
83 | CopyMem (\r | |
84 | &PxeDbGetStatus,\r | |
4cda7726 | 85 | ((SNP_DRIVER *) SnpPtr)->Db,\r |
8a67d61d | 86 | sizeof (UINT32) * 2\r |
87 | );\r | |
88 | \r | |
89 | if (PxeDbGetStatus.RxFrameLen != 0) {\r | |
90 | gBS->SignalEvent (Event);\r | |
91 | }\r | |
92 | }\r | |
93 | \r | |
94 | /* eof - WaitForPacket.c */\r |