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b5867578 | 1 | /** @file\r |
2 | Block IO2 protocol as defined in the UEFI 2.3.1 specification.\r | |
3 | \r | |
4 | The Block IO2 protocol defines an extension to the Block IO protocol which\r | |
5 | enables the ability to read and write data at a block level in a non-blocking\r | |
6 | manner.\r | |
7 | \r | |
8 | Copyright (c) 2011, Intel Corporation. All rights reserved.<BR>\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 | \r | |
19 | #ifndef __BLOCK_IO2_H__\r | |
20 | #define __BLOCK_IO2_H__\r | |
21 | \r | |
22 | #include <Protocol/BlockIo.h>\r | |
23 | \r | |
24 | #define EFI_BLOCK_IO2_PROTOCOL_GUID \\r | |
25 | { \\r | |
26 | 0xa77b2472, 0xe282, 0x4e9f, {0xa2, 0x45, 0xc2, 0xc0, 0xe2, 0x7b, 0xbc, 0xc1} \\r | |
27 | }\r | |
28 | \r | |
29 | typedef struct _EFI_BLOCK_IO2_PROTOCOL EFI_BLOCK_IO2_PROTOCOL;\r | |
30 | \r | |
31 | /**\r | |
32 | The struct of Block IO2 Token.\r | |
33 | **/\r | |
34 | typedef struct {\r | |
35 | \r | |
36 | ///\r | |
37 | /// If Event is NULL, then blocking I/O is performed.If Event is not NULL and\r | |
38 | /// non-blocking I/O is supported, then non-blocking I/O is performed, and\r | |
39 | /// Event will be signaled when the read request is completed.\r | |
40 | ///\r | |
41 | EFI_EVENT Event;\r | |
42 | \r | |
43 | ///\r | |
44 | /// Defines whether or not the signaled event encountered an error.\r | |
45 | ///\r | |
46 | EFI_STATUS TransactionStatus;\r | |
47 | } EFI_BLOCK_IO2_TOKEN;\r | |
48 | \r | |
49 | \r | |
50 | /**\r | |
51 | Reset the block device hardware.\r | |
52 | \r | |
53 | @param[in] This Indicates a pointer to the calling context.\r | |
54 | @param[in] ExtendedVerification Indicates that the driver may perform a more\r | |
55 | exhausive verfication operation of the device\r | |
56 | during reset.\r | |
57 | \r | |
58 | @retval EFI_SUCCESS The device was reset.\r | |
59 | @retval EFI_DEVICE_ERROR The device is not functioning properly and could\r | |
60 | not be reset.\r | |
61 | \r | |
62 | **/\r | |
63 | typedef\r | |
64 | EFI_STATUS\r | |
65 | (EFIAPI *EFI_BLOCK_RESET_EX) (\r | |
66 | IN EFI_BLOCK_IO2_PROTOCOL *This,\r | |
67 | IN BOOLEAN ExtendedVerification\r | |
68 | );\r | |
69 | \r | |
70 | /**\r | |
71 | Read BufferSize bytes from Lba into Buffer.\r | |
72 | \r | |
73 | This function reads the requested number of blocks from the device. All the\r | |
74 | blocks are read, or an error is returned.\r | |
75 | If EFI_DEVICE_ERROR, EFI_NO_MEDIA,_or EFI_MEDIA_CHANGED is returned and\r | |
76 | non-blocking I/O is being used, the Event associated with this request will\r | |
77 | not be signaled.\r | |
78 | \r | |
79 | @param[in] This Indicates a pointer to the calling context.\r | |
80 | @param[in] MediaId Id of the media, changes every time the media is \r | |
81 | replaced.\r | |
82 | @param[in] Lba The starting Logical Block Address to read from.\r | |
83 | @param[in, out] Token A pointer to the token associated with the transaction.\r | |
84 | @param[in] BufferSize Size of Buffer, must be a multiple of device block size. \r | |
85 | @param[out] Buffer A pointer to the destination buffer for the data. The \r | |
86 | caller is responsible for either having implicit or \r | |
87 | explicit ownership of the buffer.\r | |
88 | \r | |
89 | @retval EFI_SUCCESS The read request was queued if Token->Event is\r | |
90 | not NULL.The data was read correctly from the\r | |
91 | device if the Token->Event is NULL.\r | |
92 | @retval EFI_DEVICE_ERROR The device reported an error while performing\r | |
93 | the read.\r | |
94 | @retval EFI_NO_MEDIA There is no media in the device.\r | |
95 | @retval EFI_MEDIA_CHANGED The MediaId is not for the current media.\r | |
96 | @retval EFI_BAD_BUFFER_SIZE The BufferSize parameter is not a multiple of the\r | |
97 | intrinsic block size of the device.\r | |
98 | @retval EFI_INVALID_PARAMETER The read request contains LBAs that are not valid, \r | |
99 | or the buffer is not on proper alignment.\r | |
100 | @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack\r | |
101 | of resources.\r | |
102 | **/\r | |
103 | typedef\r | |
104 | EFI_STATUS\r | |
105 | (EFIAPI *EFI_BLOCK_READ_EX) (\r | |
106 | IN EFI_BLOCK_IO2_PROTOCOL *This,\r | |
107 | IN UINT32 MediaId,\r | |
108 | IN EFI_LBA LBA,\r | |
109 | IN OUT EFI_BLOCK_IO2_TOKEN *Token,\r | |
110 | IN UINTN BufferSize,\r | |
111 | OUT VOID *Buffer\r | |
112 | );\r | |
113 | \r | |
114 | /**\r | |
115 | Write BufferSize bytes from Lba into Buffer.\r | |
116 | \r | |
117 | This function writes the requested number of blocks to the device. All blocks\r | |
118 | are written, or an error is returned.If EFI_DEVICE_ERROR, EFI_NO_MEDIA,\r | |
119 | EFI_WRITE_PROTECTED or EFI_MEDIA_CHANGED is returned and non-blocking I/O is\r | |
120 | being used, the Event associated with this request will not be signaled.\r | |
121 | \r | |
122 | @param[in] This Indicates a pointer to the calling context.\r | |
123 | @param[in] MediaId The media ID that the write request is for.\r | |
124 | @param[in] Lba The starting logical block address to be written. The\r | |
125 | caller is responsible for writing to only legitimate\r | |
126 | locations.\r | |
127 | @param[in, out] Token A pointer to the token associated with the transaction.\r | |
128 | @param[in] BufferSize Size of Buffer, must be a multiple of device block size.\r | |
129 | @param[in] Buffer A pointer to the source buffer for the data.\r | |
130 | \r | |
131 | @retval EFI_SUCCESS The write request was queued if Event is not NULL.\r | |
132 | The data was written correctly to the device if\r | |
133 | the Event is NULL.\r | |
134 | @retval EFI_WRITE_PROTECTED The device can not be written to.\r | |
135 | @retval EFI_NO_MEDIA There is no media in the device.\r | |
136 | @retval EFI_MEDIA_CHNAGED The MediaId does not matched the current device.\r | |
137 | @retval EFI_DEVICE_ERROR The device reported an error while performing the write.\r | |
138 | @retval EFI_BAD_BUFFER_SIZE The Buffer was not a multiple of the block size of the device.\r | |
139 | @retval EFI_INVALID_PARAMETER The write request contains LBAs that are not valid, \r | |
140 | or the buffer is not on proper alignment.\r | |
141 | @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack\r | |
142 | of resources.\r | |
143 | \r | |
144 | **/\r | |
145 | typedef\r | |
146 | EFI_STATUS\r | |
147 | (EFIAPI *EFI_BLOCK_WRITE_EX) (\r | |
148 | IN EFI_BLOCK_IO2_PROTOCOL *This,\r | |
149 | IN UINT32 MediaId,\r | |
150 | IN EFI_LBA LBA,\r | |
151 | IN OUT EFI_BLOCK_IO2_TOKEN *Token,\r | |
152 | IN UINTN BufferSize,\r | |
153 | IN VOID *Buffer\r | |
154 | );\r | |
155 | \r | |
156 | /**\r | |
157 | Flush the Block Device.\r | |
158 | \r | |
159 | If EFI_DEVICE_ERROR, EFI_NO_MEDIA,_EFI_WRITE_PROTECTED or EFI_MEDIA_CHANGED\r | |
160 | is returned and non-blocking I/O is being used, the Event associated with\r | |
161 | this request will not be signaled. \r | |
162 | \r | |
163 | @param[in] This Indicates a pointer to the calling context.\r | |
164 | @param[in,out] Token A pointer to the token associated with the transaction\r | |
165 | \r | |
166 | @retval EFI_SUCCESS The flush request was queued if Event is not NULL.\r | |
167 | All outstanding data was written correctly to the\r | |
168 | device if the Event is NULL.\r | |
169 | @retval EFI_DEVICE_ERROR The device reported an error while writting back\r | |
170 | the data.\r | |
171 | @retval EFI_WRITE_PROTECTED The device cannot be written to.\r | |
172 | @retval EFI_NO_MEDIA There is no media in the device.\r | |
173 | @retval EFI_MEDIA_CHANGED The MediaId is not for the current media.\r | |
174 | @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack\r | |
175 | of resources.\r | |
176 | \r | |
177 | **/\r | |
178 | typedef\r | |
179 | EFI_STATUS\r | |
180 | (EFIAPI *EFI_BLOCK_FLUSH_EX) (\r | |
181 | IN EFI_BLOCK_IO2_PROTOCOL *This,\r | |
182 | IN OUT EFI_BLOCK_IO2_TOKEN *Token\r | |
183 | );\r | |
184 | \r | |
185 | ///\r | |
186 | /// The Block I/O2 protocol defines an extension to the Block I/O protocol which\r | |
187 | /// enables the ability to read and write data at a block level in a non-blocking\r | |
188 | // manner.\r | |
189 | ///\r | |
190 | struct _EFI_BLOCK_IO2_PROTOCOL {\r | |
191 | ///\r | |
192 | /// A pointer to the EFI_BLOCK_IO_MEDIA data for this device. \r | |
193 | /// Type EFI_BLOCK_IO_MEDIA is defined in BlockIo.h.\r | |
194 | /// \r | |
195 | EFI_BLOCK_IO_MEDIA *Media;\r | |
196 | \r | |
197 | EFI_BLOCK_RESET_EX Reset;\r | |
198 | EFI_BLOCK_READ_EX ReadBlocksEx;\r | |
199 | EFI_BLOCK_WRITE_EX WriteBlocksEx;\r | |
200 | EFI_BLOCK_FLUSH_EX FlushBlocksEx;\r | |
201 | };\r | |
202 | \r | |
203 | extern EFI_GUID gEfiBlockIo2ProtocolGuid;\r | |
204 | \r | |
205 | #endif\r | |
206 | \r |