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53e1e5c6 | 1 | /** @file\r |
2 | Device Abstraction: device creation utility functions.\r | |
3 | \r | |
4 | Copyright (c) 2011, Intel Corporation. All rights reserved.<BR>\r | |
5 | This program and the accompanying materials are licensed and made available under\r | |
6 | the terms and conditions of the BSD License that accompanies this distribution.\r | |
7 | 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 | #include <Uefi.h>\r | |
14 | #include <Library/BaseLib.h>\r | |
15 | #include <Library/MemoryAllocationLib.h>\r | |
16 | \r | |
17 | #include <LibConfig.h>\r | |
18 | \r | |
19 | #include <errno.h>\r | |
20 | #include <sys/poll.h>\r | |
21 | #include <kfile.h>\r | |
22 | #include <Device/Device.h>\r | |
23 | #include <MainData.h>\r | |
24 | \r | |
25 | LIST_ENTRY daDeviceList = INITIALIZE_LIST_HEAD_VARIABLE(daDeviceList);\r | |
26 | DeviceNode *daDefaultDevice = NULL; ///< Device to use if nothing else found\r | |
27 | DeviceNode *daRootDevice = NULL; ///< Device containing the root file system\r | |
28 | DeviceNode *daCurrentDevice = NULL; ///< Device currently being accessed\r | |
29 | \r | |
30 | /* Commonly used fileops\r | |
31 | fnullop_* Does nothing and returns success.\r | |
32 | fbadop_* Does nothing and returns EPERM\r | |
33 | */\r | |
d7ce7006 | 34 | int EFIAPI fnullop_fcntl (struct __filedes *filp, UINT32 Cmd, void *p3, void *p4)\r |
53e1e5c6 | 35 | { return 0; }\r |
36 | \r | |
d7ce7006 | 37 | short EFIAPI fnullop_poll (struct __filedes *filp, short Events)\r |
53e1e5c6 | 38 | {\r |
39 | return ((POLLIN | POLLRDNORM | POLLOUT) & Events);\r | |
40 | }\r | |
41 | \r | |
d7ce7006 | 42 | int EFIAPI fnullop_flush (struct __filedes *filp)\r |
53e1e5c6 | 43 | { return 0; }\r |
44 | \r | |
d7ce7006 | 45 | int EFIAPI fbadop_stat (struct __filedes *filp, struct stat *StatBuf, void *Buf)\r |
53e1e5c6 | 46 | { return -EPERM; }\r |
47 | \r | |
d7ce7006 | 48 | int EFIAPI fbadop_ioctl (struct __filedes *filp, ULONGN Cmd, void *argp)\r |
53e1e5c6 | 49 | { return -EPERM; }\r |
50 | \r | |
d7ce7006 | 51 | int EFIAPI fbadop_delete (struct __filedes *filp)\r |
53e1e5c6 | 52 | { return -EPERM; }\r |
53 | \r | |
d7ce7006 | 54 | int EFIAPI fbadop_mkdir (const char *path, __mode_t perms)\r |
53e1e5c6 | 55 | { return -EPERM; }\r |
56 | \r | |
d7ce7006 | 57 | int EFIAPI fbadop_rename (const char *from, const char *to)\r |
53e1e5c6 | 58 | { return -EPERM; }\r |
59 | \r | |
d7ce7006 | 60 | int EFIAPI fbadop_rmdir (struct __filedes *filp)\r |
53e1e5c6 | 61 | { return -EPERM; }\r |
62 | \r | |
63 | /** Add a new device to the device list.\r | |
64 | If both DevName and DevProto are NULL, register this as the Default device.\r | |
65 | \r | |
66 | @param DevName Name of the device to add.\r | |
67 | @param DevProto Pointer to the GUID identifying the protocol associated with this device.\r | |
68 | If DevProto is NULL, startup code will not try to find instances\r | |
69 | of this device.\r | |
70 | @param OpenFunc Pointer to the device's Open function.\r | |
71 | @param InstanceList Optional pointer to the device's initialized instance list.\r | |
72 | If InstanceList is NULL, the application startup code will\r | |
73 | scan for instances of the protocol identified by DevProto and\r | |
74 | populate the InstanceList in the order those protocols are found.\r | |
75 | @param NumInstance Number of instances in InstanceList.\r | |
76 | @param Modes Bit-mapped flags indicating operations (R, W, RW, ...) permitted to this device.\r | |
77 | \r | |
78 | **/\r | |
79 | DeviceNode *\r | |
80 | EFIAPI\r | |
81 | __DevRegister(\r | |
82 | IN const CHAR16 *DevName,\r | |
83 | IN GUID *DevProto,\r | |
84 | IN FO_OPEN OpenFunc,\r | |
85 | IN void *InstanceList,\r | |
86 | IN int NumInstance,\r | |
87 | IN UINT32 InstanceSize,\r | |
88 | IN UINT32 Modes\r | |
89 | )\r | |
90 | {\r | |
91 | DeviceNode *Node;\r | |
92 | GenericInstance *GIp;\r | |
93 | char *GenPtr;\r | |
94 | int i;\r | |
95 | \r | |
96 | /* Validate parameters */\r | |
97 | if(((DevName == NULL) && (DevProto != NULL)) ||\r | |
98 | (OpenFunc == NULL)) {\r | |
99 | EFIerrno = RETURN_INVALID_PARAMETER;\r | |
100 | return NULL;\r | |
101 | }\r | |
102 | Node = (DeviceNode *)AllocateZeroPool(sizeof(DeviceNode));\r | |
103 | if(Node == NULL) {\r | |
104 | EFIerrno = RETURN_OUT_OF_RESOURCES;\r | |
105 | return NULL;\r | |
106 | }\r | |
107 | \r | |
108 | Node->DevName = DevName;\r | |
109 | Node->DevProto = DevProto;\r | |
110 | Node->InstanceList = InstanceList;\r | |
111 | Node->OpenFunc = OpenFunc;\r | |
112 | Node->InstanceSize = InstanceSize;\r | |
113 | Node->NumInstances = NumInstance;\r | |
114 | Node->OpModes = Modes;\r | |
115 | \r | |
116 | /* Update the Parent member of each element of the InstanceList */\r | |
117 | if(InstanceList != NULL) {\r | |
118 | GenPtr = InstanceList;\r | |
119 | \r | |
120 | for(i = 0; i < NumInstance; ++i) { // Iterate through each element of InstanceList\r | |
121 | GIp = (GenericInstance *)GenPtr;\r | |
122 | GIp->Parent = Node; // Initializing the Parent member & InstanceNum\r | |
123 | //GIp->InstanceNum = i;\r | |
124 | GenPtr += InstanceSize;\r | |
125 | }\r | |
126 | }\r | |
127 | if(DevName == NULL) {\r | |
128 | if(daDefaultDevice != NULL) {\r | |
129 | EFIerrno = RETURN_INVALID_PARAMETER;\r | |
130 | return NULL;\r | |
131 | }\r | |
132 | daDefaultDevice = Node;\r | |
133 | }\r | |
134 | else {\r | |
135 | (void) InsertTailList(&daDeviceList, &Node->DevList);\r | |
136 | }\r | |
137 | EFIerrno = RETURN_SUCCESS;\r | |
138 | return Node;\r | |
139 | }\r |