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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 | SPDX-License-Identifier: BSD-2-Clause-Patent\r | |
10 | \r | |
11 | **/\r | |
12 | #include "EventChannel.h"\r | |
13 | \r | |
14 | #include <Library/XenHypercallLib.h>\r | |
15 | \r | |
16 | UINT32\r | |
17 | XenEventChannelNotify (\r | |
18 | IN XENBUS_DEVICE *Dev,\r | |
19 | IN evtchn_port_t Port\r | |
20 | )\r | |
21 | {\r | |
22 | INTN ReturnCode;\r | |
23 | evtchn_send_t Send;\r | |
24 | \r | |
25 | Send.port = Port;\r | |
26 | ReturnCode = XenHypercallEventChannelOp (EVTCHNOP_send, &Send);\r | |
27 | return (UINT32)ReturnCode;\r | |
28 | }\r | |
29 | \r | |
30 | UINT32\r | |
31 | EFIAPI\r | |
32 | XenBusEventChannelAllocate (\r | |
33 | IN XENBUS_PROTOCOL *This,\r | |
34 | IN domid_t DomainId,\r | |
35 | OUT evtchn_port_t *Port\r | |
36 | )\r | |
37 | {\r | |
38 | evtchn_alloc_unbound_t Parameter;\r | |
39 | UINT32 ReturnCode;\r | |
40 | \r | |
41 | Parameter.dom = DOMID_SELF;\r | |
42 | Parameter.remote_dom = DomainId;\r | |
43 | ReturnCode = (UINT32)XenHypercallEventChannelOp (\r | |
44 | EVTCHNOP_alloc_unbound,\r | |
45 | &Parameter);\r | |
46 | if (ReturnCode != 0) {\r | |
47 | DEBUG ((DEBUG_ERROR, "ERROR: alloc_unbound failed with rc=%d", ReturnCode));\r | |
48 | return ReturnCode;\r | |
49 | }\r | |
50 | *Port = Parameter.port;\r | |
51 | return ReturnCode;\r | |
52 | }\r | |
53 | \r | |
54 | UINT32\r | |
55 | EFIAPI\r | |
56 | XenBusEventChannelNotify (\r | |
57 | IN XENBUS_PROTOCOL *This,\r | |
58 | IN evtchn_port_t Port\r | |
59 | )\r | |
60 | {\r | |
61 | XENBUS_PRIVATE_DATA *Private;\r | |
62 | \r | |
63 | Private = XENBUS_PRIVATE_DATA_FROM_THIS(This);\r | |
64 | return XenEventChannelNotify (Private->Dev, Port);\r | |
65 | }\r | |
66 | \r | |
67 | UINT32\r | |
68 | EFIAPI\r | |
69 | XenBusEventChannelClose (\r | |
70 | IN XENBUS_PROTOCOL *This,\r | |
71 | IN evtchn_port_t Port\r | |
72 | )\r | |
73 | {\r | |
74 | evtchn_close_t Close;\r | |
75 | \r | |
76 | Close.port = Port;\r | |
77 | return (UINT32)XenHypercallEventChannelOp (EVTCHNOP_close, &Close);\r | |
78 | }\r |