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1 | /** @file\r | |
2 | Event Channel function implementation.\r | |
3 | \r | |
4 | Event channel are use to notify of an event that happened in a shared\r | |
5 | structure for example.\r | |
6 | \r | |
7 | Copyright (C) 2014, Citrix Ltd.\r | |
8 | \r | |
9 | This program and the accompanying materials\r | |
10 | are licensed and made available under the terms and conditions of the BSD License\r | |
11 | which accompanies this distribution. The full text of the license may be found at\r | |
12 | http://opensource.org/licenses/bsd-license.php\r | |
13 | \r | |
14 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
15 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
16 | \r | |
17 | **/\r | |
18 | #include "EventChannel.h"\r | |
19 | \r | |
20 | #include <Library/XenHypercallLib.h>\r | |
21 | \r | |
22 | UINT32\r | |
23 | XenEventChannelNotify (\r | |
24 | IN XENBUS_DEVICE *Dev,\r | |
25 | IN evtchn_port_t Port\r | |
26 | )\r | |
27 | {\r | |
28 | INTN ReturnCode;\r | |
29 | evtchn_send_t Send;\r | |
30 | \r | |
31 | Send.port = Port;\r | |
32 | ReturnCode = XenHypercallEventChannelOp (EVTCHNOP_send, &Send);\r | |
33 | return (UINT32)ReturnCode;\r | |
34 | }\r | |
35 | \r | |
36 | UINT32\r | |
37 | EFIAPI\r | |
38 | XenBusEventChannelAllocate (\r | |
39 | IN XENBUS_PROTOCOL *This,\r | |
40 | IN domid_t DomainId,\r | |
41 | OUT evtchn_port_t *Port\r | |
42 | )\r | |
43 | {\r | |
44 | evtchn_alloc_unbound_t Parameter;\r | |
45 | UINT32 ReturnCode;\r | |
46 | \r | |
47 | Parameter.dom = DOMID_SELF;\r | |
48 | Parameter.remote_dom = DomainId;\r | |
49 | ReturnCode = (UINT32)XenHypercallEventChannelOp (\r | |
50 | EVTCHNOP_alloc_unbound,\r | |
51 | &Parameter);\r | |
52 | if (ReturnCode != 0) {\r | |
53 | DEBUG ((EFI_D_ERROR, "ERROR: alloc_unbound failed with rc=%d", ReturnCode));\r | |
54 | return ReturnCode;\r | |
55 | }\r | |
56 | *Port = Parameter.port;\r | |
57 | return ReturnCode;\r | |
58 | }\r | |
59 | \r | |
60 | UINT32\r | |
61 | EFIAPI\r | |
62 | XenBusEventChannelNotify (\r | |
63 | IN XENBUS_PROTOCOL *This,\r | |
64 | IN evtchn_port_t Port\r | |
65 | )\r | |
66 | {\r | |
67 | XENBUS_PRIVATE_DATA *Private;\r | |
68 | \r | |
69 | Private = XENBUS_PRIVATE_DATA_FROM_THIS(This);\r | |
70 | return XenEventChannelNotify (Private->Dev, Port);\r | |
71 | }\r | |
72 | \r | |
73 | UINT32\r | |
74 | EFIAPI\r | |
75 | XenBusEventChannelClose (\r | |
76 | IN XENBUS_PROTOCOL *This,\r | |
77 | IN evtchn_port_t Port\r | |
78 | )\r | |
79 | {\r | |
80 | evtchn_close_t Close;\r | |
81 | \r | |
82 | Close.port = Port;\r | |
83 | return (UINT32)XenHypercallEventChannelOp (EVTCHNOP_close, &Close);\r | |
84 | }\r |