projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| 38f52db9 LE |
1 | /** @file\r |
| 2 | \r | |
| 3 | Implements\r | |
| 4 | - the SNM.WaitForPacket EVT_NOTIFY_WAIT event,\r | |
| 5 | - the EVT_SIGNAL_EXIT_BOOT_SERVICES event\r | |
| 6 | for the virtio-net driver.\r | |
| 7 | \r | |
| 8 | Copyright (C) 2013, Red Hat, Inc.\r | |
| 9 | Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>\r | |
| 10 | \r | |
| b26f0cf9 | 11 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
| 38f52db9 LE |
12 | \r |
| 13 | **/\r | |
| 14 | \r | |
| 15 | #include <Library/BaseLib.h>\r | |
| 16 | #include <Library/UefiBootServicesTableLib.h>\r | |
| 17 | \r | |
| 18 | #include "VirtioNet.h"\r | |
| 19 | \r | |
| 20 | /**\r | |
| 21 | Invoke a notification event\r | |
| 22 | \r | |
| 23 | @param Event Event whose notification function is being\r | |
| 24 | invoked.\r | |
| 25 | @param Context The pointer to the notification function's\r | |
| 26 | context, which is implementation-dependent.\r | |
| 27 | \r | |
| 28 | **/\r | |
| 29 | \r | |
| 30 | VOID\r | |
| 31 | EFIAPI\r | |
| 32 | VirtioNetIsPacketAvailable (\r | |
| 33 | IN EFI_EVENT Event,\r | |
| 34 | IN VOID *Context\r | |
| 35 | )\r | |
| 36 | {\r | |
| 37 | //\r | |
| 38 | // This callback has been enqueued by an external application and is\r | |
| 39 | // running at TPL_CALLBACK already.\r | |
| 40 | //\r | |
| 41 | // The WaitForPacket logic is similar to that of WaitForKey. The former has\r | |
| 42 | // almost no documentation in either the UEFI-2.3.1+errC spec or the\r | |
| 43 | // DWG-2.3.1, but WaitForKey does have some.\r | |
| 44 | //\r | |
| 45 | VNET_DEV *Dev;\r | |
| 46 | UINT16 RxCurUsed;\r | |
| 47 | \r | |
| 48 | Dev = Context;\r | |
| 49 | if (Dev->Snm.State != EfiSimpleNetworkInitialized) {\r | |
| 50 | return;\r | |
| 51 | }\r | |
| 52 | \r | |
| 53 | //\r | |
| 54 | // virtio-0.9.5, 2.4.2 Receiving Used Buffers From the Device\r | |
| 55 | //\r | |
| 56 | MemoryFence ();\r | |
| 57 | RxCurUsed = *Dev->RxRing.Used.Idx;\r | |
| dc9447bd | 58 | MemoryFence ();\r |
| 38f52db9 LE |
59 | \r |
| 60 | if (Dev->RxLastUsed != RxCurUsed) {\r | |
| 61 | gBS->SignalEvent (&Dev->Snp.WaitForPacket);\r | |
| 62 | }\r | |
| 63 | }\r | |
| 64 | \r | |
| 65 | VOID\r | |
| 66 | EFIAPI\r | |
| 67 | VirtioNetExitBoot (\r | |
| 68 | IN EFI_EVENT Event,\r | |
| 69 | IN VOID *Context\r | |
| 70 | )\r | |
| 71 | {\r | |
| 72 | //\r | |
| 73 | // This callback has been enqueued by ExitBootServices() and is running at\r | |
| 74 | // TPL_CALLBACK already.\r | |
| 75 | //\r | |
| 76 | // Shut down pending transfers according to DWG-2.3.1, "25.5.1 Exit Boot\r | |
| 77 | // Services Event".\r | |
| 78 | //\r | |
| 79 | VNET_DEV *Dev;\r | |
| 80 | \r | |
| d83defe0 | 81 | DEBUG ((DEBUG_VERBOSE, "%a: Context=0x%p\n", __FUNCTION__, Context));\r |
| 38f52db9 LE |
82 | Dev = Context;\r |
| 83 | if (Dev->Snm.State == EfiSimpleNetworkInitialized) {\r | |
| 56f65ed8 | 84 | Dev->VirtIo->SetDeviceStatus (Dev->VirtIo, 0);\r |
| 38f52db9 LE |
85 | }\r |
| 86 | }\r |