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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 |
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