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e42e9404 | 1 | /** @file\r |
2 | Support functions for UEFI protocol notification infrastructure.\r | |
3 | \r | |
cd5ebaa0 | 4 | Copyright (c) 2009 - 2010, Intel Corporation. All rights reserved.<BR>\r |
e42e9404 | 5 | This program and the accompanying materials are licensed and made available \r |
6 | under the terms and conditions of the BSD License which accompanies this \r | |
7 | distribution. The full text of the license may be found at \r | |
8 | http://opensource.org/licenses/bsd-license.php \r | |
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 | |
13 | **/\r | |
14 | \r | |
15 | #include "PiSmmCore.h"\r | |
16 | \r | |
17 | /**\r | |
18 | Signal event for every protocol in protocol entry.\r | |
19 | \r | |
20 | @param Prot Protocol interface\r | |
21 | \r | |
22 | **/\r | |
23 | VOID\r | |
24 | SmmNotifyProtocol (\r | |
25 | IN PROTOCOL_INTERFACE *Prot\r | |
26 | )\r | |
27 | {\r | |
28 | PROTOCOL_ENTRY *ProtEntry;\r | |
29 | PROTOCOL_NOTIFY *ProtNotify;\r | |
30 | LIST_ENTRY *Link;\r | |
31 | \r | |
32 | ProtEntry = Prot->Protocol;\r | |
33 | for (Link=ProtEntry->Notify.ForwardLink; Link != &ProtEntry->Notify; Link=Link->ForwardLink) {\r | |
34 | ProtNotify = CR(Link, PROTOCOL_NOTIFY, Link, PROTOCOL_NOTIFY_SIGNATURE);\r | |
35 | ProtNotify->Function (&ProtEntry->ProtocolID, Prot->Interface, Prot->Handle);\r | |
36 | }\r | |
37 | }\r | |
38 | \r | |
39 | /**\r | |
40 | Removes Protocol from the protocol list (but not the handle list).\r | |
41 | \r | |
42 | @param Handle The handle to remove protocol on.\r | |
43 | @param Protocol GUID of the protocol to be moved\r | |
44 | @param Interface The interface of the protocol\r | |
45 | \r | |
46 | @return Protocol Entry\r | |
47 | \r | |
48 | **/\r | |
49 | PROTOCOL_INTERFACE *\r | |
50 | SmmRemoveInterfaceFromProtocol (\r | |
51 | IN IHANDLE *Handle,\r | |
52 | IN EFI_GUID *Protocol,\r | |
53 | IN VOID *Interface\r | |
54 | )\r | |
55 | {\r | |
56 | PROTOCOL_INTERFACE *Prot;\r | |
57 | PROTOCOL_NOTIFY *ProtNotify;\r | |
58 | PROTOCOL_ENTRY *ProtEntry;\r | |
59 | LIST_ENTRY *Link;\r | |
60 | \r | |
61 | Prot = SmmFindProtocolInterface (Handle, Protocol, Interface);\r | |
62 | if (Prot != NULL) {\r | |
63 | \r | |
64 | ProtEntry = Prot->Protocol;\r | |
65 | \r | |
66 | //\r | |
67 | // If there's a protocol notify location pointing to this entry, back it up one\r | |
68 | //\r | |
69 | for(Link = ProtEntry->Notify.ForwardLink; Link != &ProtEntry->Notify; Link=Link->ForwardLink) {\r | |
70 | ProtNotify = CR(Link, PROTOCOL_NOTIFY, Link, PROTOCOL_NOTIFY_SIGNATURE);\r | |
71 | \r | |
72 | if (ProtNotify->Position == &Prot->ByProtocol) {\r | |
73 | ProtNotify->Position = Prot->ByProtocol.BackLink;\r | |
74 | }\r | |
75 | }\r | |
76 | \r | |
77 | //\r | |
78 | // Remove the protocol interface entry\r | |
79 | //\r | |
80 | RemoveEntryList (&Prot->ByProtocol);\r | |
81 | }\r | |
82 | \r | |
83 | return Prot;\r | |
84 | }\r | |
85 | \r | |
86 | /**\r | |
87 | Add a new protocol notification record for the request protocol.\r | |
88 | \r | |
89 | @param Protocol The requested protocol to add the notify\r | |
90 | registration\r | |
91 | @param Function Points to the notification function\r | |
92 | @param Registration Returns the registration record\r | |
93 | \r | |
94 | @retval EFI_INVALID_PARAMETER Invalid parameter\r | |
95 | @retval EFI_SUCCESS Successfully returned the registration record\r | |
96 | that has been added\r | |
97 | \r | |
98 | **/\r | |
99 | EFI_STATUS\r | |
100 | EFIAPI\r | |
101 | SmmRegisterProtocolNotify (\r | |
102 | IN CONST EFI_GUID *Protocol,\r | |
103 | IN EFI_SMM_NOTIFY_FN Function,\r | |
104 | OUT VOID **Registration\r | |
105 | )\r | |
106 | {\r | |
107 | PROTOCOL_ENTRY *ProtEntry;\r | |
108 | PROTOCOL_NOTIFY *ProtNotify;\r | |
109 | LIST_ENTRY *Link;\r | |
110 | EFI_STATUS Status;\r | |
111 | \r | |
112 | if ((Protocol == NULL) || (Function == NULL) || (Registration == NULL)) {\r | |
113 | return EFI_INVALID_PARAMETER;\r | |
114 | }\r | |
115 | \r | |
116 | ProtNotify = NULL;\r | |
117 | \r | |
118 | //\r | |
119 | // Get the protocol entry to add the notification too\r | |
120 | //\r | |
121 | ProtEntry = SmmFindProtocolEntry ((EFI_GUID *) Protocol, TRUE);\r | |
122 | if (ProtEntry != NULL) {\r | |
123 | //\r | |
124 | // Find whether notification already exist\r | |
125 | //\r | |
126 | for (Link = ProtEntry->Notify.ForwardLink;\r | |
127 | Link != &ProtEntry->Notify;\r | |
128 | Link = Link->ForwardLink) {\r | |
129 | \r | |
130 | ProtNotify = CR(Link, PROTOCOL_NOTIFY, Link, PROTOCOL_NOTIFY_SIGNATURE);\r | |
131 | if (CompareGuid (&ProtNotify->Protocol->ProtocolID, Protocol) &&\r | |
132 | (ProtNotify->Function == Function)) {\r | |
133 | \r | |
134 | //\r | |
135 | // Notification already exist\r | |
136 | //\r | |
137 | *Registration = ProtNotify;\r | |
138 | \r | |
139 | return EFI_SUCCESS;\r | |
140 | }\r | |
141 | }\r | |
142 | \r | |
143 | //\r | |
144 | // Allocate a new notification record\r | |
145 | //\r | |
146 | ProtNotify = AllocatePool (sizeof(PROTOCOL_NOTIFY));\r | |
147 | if (ProtNotify != NULL) {\r | |
148 | ProtNotify->Signature = PROTOCOL_NOTIFY_SIGNATURE;\r | |
149 | ProtNotify->Protocol = ProtEntry;\r | |
150 | ProtNotify->Function = Function;\r | |
151 | //\r | |
152 | // Start at the ending\r | |
153 | //\r | |
154 | ProtNotify->Position = ProtEntry->Protocols.BackLink;\r | |
155 | \r | |
156 | InsertTailList (&ProtEntry->Notify, &ProtNotify->Link);\r | |
157 | }\r | |
158 | }\r | |
159 | \r | |
160 | //\r | |
161 | // Done. If we have a protocol notify entry, then return it.\r | |
162 | // Otherwise, we must have run out of resources trying to add one\r | |
163 | //\r | |
164 | Status = EFI_OUT_OF_RESOURCES;\r | |
165 | if (ProtNotify != NULL) {\r | |
166 | *Registration = ProtNotify;\r | |
167 | Status = EFI_SUCCESS;\r | |
168 | }\r | |
169 | return Status;\r | |
170 | }\r |