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1 | /** @file\r | |
2 | \r | |
3 | This driver produces Virtio Device Protocol instances for Virtio PCI devices.\r | |
4 | \r | |
5 | Copyright (C) 2012, Red Hat, Inc.\r | |
6 | Copyright (c) 2012, Intel Corporation. All rights reserved.<BR>\r | |
7 | Copyright (C) 2013, ARM Ltd.\r | |
8 | Copyright (C) 2017, AMD Inc, All rights reserved.<BR>\r | |
9 | \r | |
10 | This program and the accompanying materials are licensed and made available\r | |
11 | under the terms and conditions of the BSD License which accompanies this\r | |
12 | distribution. The full text of the license may be found at\r | |
13 | http://opensource.org/licenses/bsd-license.php\r | |
14 | \r | |
15 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT\r | |
16 | WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
17 | \r | |
18 | **/\r | |
19 | #include <Library/BaseMemoryLib.h>\r | |
20 | #include <Library/DebugLib.h>\r | |
21 | #include <Library/MemoryAllocationLib.h>\r | |
22 | #include <Library/UefiBootServicesTableLib.h>\r | |
23 | #include <Library/UefiLib.h>\r | |
24 | #include "VirtioPciDevice.h"\r | |
25 | \r | |
26 | /**\r | |
27 | \r | |
28 | Read a word from Region 0 of the device specified by VirtIo Device protocol.\r | |
29 | \r | |
30 | The function implements the ReadDevice protocol member of\r | |
31 | VIRTIO_DEVICE_PROTOCOL.\r | |
32 | \r | |
33 | @param[in] This VirtIo Device protocol.\r | |
34 | \r | |
35 | @param[in] FieldOffset Source offset.\r | |
36 | \r | |
37 | @param[in] FieldSize Source field size, must be in { 1, 2, 4, 8 }.\r | |
38 | \r | |
39 | @param[in] BufferSize Number of bytes available in the target buffer. Must\r | |
40 | equal FieldSize.\r | |
41 | \r | |
42 | @param[out] Buffer Target buffer.\r | |
43 | \r | |
44 | \r | |
45 | @return Status code returned by PciIo->Io.Read().\r | |
46 | \r | |
47 | **/\r | |
48 | EFI_STATUS\r | |
49 | EFIAPI\r | |
50 | VirtioPciDeviceRead (\r | |
51 | IN VIRTIO_DEVICE_PROTOCOL *This,\r | |
52 | IN UINTN FieldOffset,\r | |
53 | IN UINTN FieldSize,\r | |
54 | IN UINTN BufferSize,\r | |
55 | OUT VOID *Buffer\r | |
56 | )\r | |
57 | {\r | |
58 | VIRTIO_PCI_DEVICE *Dev;\r | |
59 | \r | |
60 | Dev = VIRTIO_PCI_DEVICE_FROM_VIRTIO_DEVICE (This);\r | |
61 | \r | |
62 | return VirtioPciIoRead (Dev,\r | |
63 | Dev->DeviceSpecificConfigurationOffset + FieldOffset,\r | |
64 | FieldSize, BufferSize, Buffer);\r | |
65 | }\r | |
66 | \r | |
67 | /**\r | |
68 | \r | |
69 | Write a word into Region 0 of the device specified by VirtIo Device protocol.\r | |
70 | \r | |
71 | @param[in] This VirtIo Device protocol.\r | |
72 | \r | |
73 | @param[in] FieldOffset Destination offset.\r | |
74 | \r | |
75 | @param[in] FieldSize Destination field size, must be in { 1, 2, 4, 8 }.\r | |
76 | \r | |
77 | @param[in] Value Little endian value to write, converted to UINT64.\r | |
78 | The least significant FieldSize bytes will be used.\r | |
79 | \r | |
80 | \r | |
81 | @return Status code returned by PciIo->Io.Write().\r | |
82 | \r | |
83 | **/\r | |
84 | EFI_STATUS\r | |
85 | EFIAPI\r | |
86 | VirtioPciDeviceWrite (\r | |
87 | IN VIRTIO_DEVICE_PROTOCOL *This,\r | |
88 | IN UINTN FieldOffset,\r | |
89 | IN UINTN FieldSize,\r | |
90 | IN UINT64 Value\r | |
91 | )\r | |
92 | {\r | |
93 | VIRTIO_PCI_DEVICE *Dev;\r | |
94 | \r | |
95 | Dev = VIRTIO_PCI_DEVICE_FROM_VIRTIO_DEVICE (This);\r | |
96 | \r | |
97 | return VirtioPciIoWrite (Dev,\r | |
98 | Dev->DeviceSpecificConfigurationOffset + FieldOffset, FieldSize, Value);\r | |
99 | }\r | |
100 | \r | |
101 | EFI_STATUS\r | |
102 | EFIAPI\r | |
103 | VirtioPciGetDeviceFeatures (\r | |
104 | IN VIRTIO_DEVICE_PROTOCOL *This,\r | |
105 | OUT UINT64 *DeviceFeatures\r | |
106 | )\r | |
107 | {\r | |
108 | VIRTIO_PCI_DEVICE *Dev;\r | |
109 | EFI_STATUS Status;\r | |
110 | UINT32 Features32;\r | |
111 | \r | |
112 | if (DeviceFeatures == NULL) {\r | |
113 | return EFI_INVALID_PARAMETER;\r | |
114 | }\r | |
115 | \r | |
116 | Dev = VIRTIO_PCI_DEVICE_FROM_VIRTIO_DEVICE (This);\r | |
117 | \r | |
118 | Status = VirtioPciIoRead (Dev, VIRTIO_PCI_OFFSET_DEVICE_FEATURES,\r | |
119 | sizeof (UINT32), sizeof (UINT32), &Features32);\r | |
120 | if (!EFI_ERROR (Status)) {\r | |
121 | *DeviceFeatures = Features32;\r | |
122 | }\r | |
123 | return Status;\r | |
124 | }\r | |
125 | \r | |
126 | EFI_STATUS\r | |
127 | EFIAPI\r | |
128 | VirtioPciGetQueueSize (\r | |
129 | IN VIRTIO_DEVICE_PROTOCOL *This,\r | |
130 | OUT UINT16 *QueueNumMax\r | |
131 | )\r | |
132 | {\r | |
133 | VIRTIO_PCI_DEVICE *Dev;\r | |
134 | \r | |
135 | if (QueueNumMax == NULL) {\r | |
136 | return EFI_INVALID_PARAMETER;\r | |
137 | }\r | |
138 | \r | |
139 | Dev = VIRTIO_PCI_DEVICE_FROM_VIRTIO_DEVICE (This);\r | |
140 | \r | |
141 | return VirtioPciIoRead (Dev, VIRTIO_PCI_OFFSET_QUEUE_SIZE, sizeof (UINT16),\r | |
142 | sizeof (UINT16), QueueNumMax);\r | |
143 | }\r | |
144 | \r | |
145 | EFI_STATUS\r | |
146 | EFIAPI\r | |
147 | VirtioPciGetDeviceStatus (\r | |
148 | IN VIRTIO_DEVICE_PROTOCOL *This,\r | |
149 | OUT UINT8 *DeviceStatus\r | |
150 | )\r | |
151 | {\r | |
152 | VIRTIO_PCI_DEVICE *Dev;\r | |
153 | \r | |
154 | if (DeviceStatus == NULL) {\r | |
155 | return EFI_INVALID_PARAMETER;\r | |
156 | }\r | |
157 | \r | |
158 | Dev = VIRTIO_PCI_DEVICE_FROM_VIRTIO_DEVICE (This);\r | |
159 | \r | |
160 | return VirtioPciIoRead (Dev, VIRTIO_PCI_OFFSET_QUEUE_DEVICE_STATUS,\r | |
161 | sizeof (UINT8), sizeof (UINT8), DeviceStatus);\r | |
162 | }\r | |
163 | \r | |
164 | EFI_STATUS\r | |
165 | EFIAPI\r | |
166 | VirtioPciSetGuestFeatures (\r | |
167 | IN VIRTIO_DEVICE_PROTOCOL *This,\r | |
168 | IN UINT64 Features\r | |
169 | )\r | |
170 | {\r | |
171 | VIRTIO_PCI_DEVICE *Dev;\r | |
172 | \r | |
173 | Dev = VIRTIO_PCI_DEVICE_FROM_VIRTIO_DEVICE (This);\r | |
174 | \r | |
175 | if (Features > MAX_UINT32) {\r | |
176 | return EFI_UNSUPPORTED;\r | |
177 | }\r | |
178 | return VirtioPciIoWrite (Dev, VIRTIO_PCI_OFFSET_GUEST_FEATURES,\r | |
179 | sizeof (UINT32), Features);\r | |
180 | }\r | |
181 | \r | |
182 | EFI_STATUS\r | |
183 | EFIAPI\r | |
184 | VirtioPciSetQueueAddress (\r | |
185 | IN VIRTIO_DEVICE_PROTOCOL *This,\r | |
186 | IN VRING *Ring,\r | |
187 | IN UINT64 RingBaseShift\r | |
188 | )\r | |
189 | {\r | |
190 | VIRTIO_PCI_DEVICE *Dev;\r | |
191 | \r | |
192 | ASSERT (RingBaseShift == 0);\r | |
193 | \r | |
194 | Dev = VIRTIO_PCI_DEVICE_FROM_VIRTIO_DEVICE (This);\r | |
195 | \r | |
196 | return VirtioPciIoWrite (Dev, VIRTIO_PCI_OFFSET_QUEUE_ADDRESS, sizeof (UINT32),\r | |
197 | (UINT32)((UINTN)Ring->Base >> EFI_PAGE_SHIFT));\r | |
198 | }\r | |
199 | \r | |
200 | EFI_STATUS\r | |
201 | EFIAPI\r | |
202 | VirtioPciSetQueueSel (\r | |
203 | IN VIRTIO_DEVICE_PROTOCOL *This,\r | |
204 | IN UINT16 Sel\r | |
205 | )\r | |
206 | {\r | |
207 | VIRTIO_PCI_DEVICE *Dev;\r | |
208 | \r | |
209 | Dev = VIRTIO_PCI_DEVICE_FROM_VIRTIO_DEVICE (This);\r | |
210 | \r | |
211 | return VirtioPciIoWrite (Dev, VIRTIO_PCI_OFFSET_QUEUE_SELECT, sizeof (UINT16),\r | |
212 | Sel);\r | |
213 | }\r | |
214 | \r | |
215 | EFI_STATUS\r | |
216 | EFIAPI\r | |
217 | VirtioPciSetQueueAlignment (\r | |
218 | IN VIRTIO_DEVICE_PROTOCOL *This,\r | |
219 | IN UINT32 Alignment\r | |
220 | )\r | |
221 | {\r | |
222 | return EFI_SUCCESS;\r | |
223 | }\r | |
224 | \r | |
225 | EFI_STATUS\r | |
226 | EFIAPI\r | |
227 | VirtioPciSetPageSize (\r | |
228 | IN VIRTIO_DEVICE_PROTOCOL *This,\r | |
229 | IN UINT32 PageSize\r | |
230 | )\r | |
231 | {\r | |
232 | return (PageSize == EFI_PAGE_SIZE) ? EFI_SUCCESS : EFI_UNSUPPORTED;\r | |
233 | }\r | |
234 | \r | |
235 | EFI_STATUS\r | |
236 | EFIAPI\r | |
237 | VirtioPciSetQueueNotify (\r | |
238 | IN VIRTIO_DEVICE_PROTOCOL *This,\r | |
239 | IN UINT16 Index\r | |
240 | )\r | |
241 | {\r | |
242 | VIRTIO_PCI_DEVICE *Dev;\r | |
243 | \r | |
244 | Dev = VIRTIO_PCI_DEVICE_FROM_VIRTIO_DEVICE (This);\r | |
245 | \r | |
246 | return VirtioPciIoWrite (Dev, VIRTIO_PCI_OFFSET_QUEUE_NOTIFY, sizeof (UINT16),\r | |
247 | Index);\r | |
248 | }\r | |
249 | \r | |
250 | EFI_STATUS\r | |
251 | EFIAPI\r | |
252 | VirtioPciSetQueueSize (\r | |
253 | IN VIRTIO_DEVICE_PROTOCOL *This,\r | |
254 | IN UINT16 Size\r | |
255 | )\r | |
256 | {\r | |
257 | //\r | |
258 | // This function is only applicable in Virtio-MMIO.\r | |
259 | // (The QueueSize field is read-only in Virtio proper (PCI))\r | |
260 | //\r | |
261 | return EFI_SUCCESS;\r | |
262 | }\r | |
263 | \r | |
264 | EFI_STATUS\r | |
265 | EFIAPI\r | |
266 | VirtioPciSetDeviceStatus (\r | |
267 | IN VIRTIO_DEVICE_PROTOCOL *This,\r | |
268 | IN UINT8 DeviceStatus\r | |
269 | )\r | |
270 | {\r | |
271 | VIRTIO_PCI_DEVICE *Dev;\r | |
272 | \r | |
273 | Dev = VIRTIO_PCI_DEVICE_FROM_VIRTIO_DEVICE (This);\r | |
274 | \r | |
275 | return VirtioPciIoWrite (Dev, VIRTIO_PCI_OFFSET_QUEUE_DEVICE_STATUS,\r | |
276 | sizeof (UINT8), DeviceStatus);\r | |
277 | }\r | |
278 | \r | |
279 | EFI_STATUS\r | |
280 | EFIAPI\r | |
281 | VirtioPciAllocateSharedPages (\r | |
282 | IN VIRTIO_DEVICE_PROTOCOL *This,\r | |
283 | IN UINTN NumPages,\r | |
284 | OUT VOID **HostAddress\r | |
285 | )\r | |
286 | {\r | |
287 | VOID *Buffer;\r | |
288 | \r | |
289 | Buffer = AllocatePages (NumPages);\r | |
290 | if (Buffer == NULL) {\r | |
291 | return EFI_OUT_OF_RESOURCES;\r | |
292 | }\r | |
293 | \r | |
294 | *HostAddress = Buffer;\r | |
295 | return EFI_SUCCESS;\r | |
296 | }\r | |
297 | \r | |
298 | VOID\r | |
299 | EFIAPI\r | |
300 | VirtioPciFreeSharedPages (\r | |
301 | IN VIRTIO_DEVICE_PROTOCOL *This,\r | |
302 | IN UINTN NumPages,\r | |
303 | IN VOID *HostAddress\r | |
304 | )\r | |
305 | {\r | |
306 | FreePages (HostAddress, NumPages);\r | |
307 | }\r | |
308 | \r | |
309 | EFI_STATUS\r | |
310 | EFIAPI\r | |
311 | VirtioPciMapSharedBuffer (\r | |
312 | IN VIRTIO_DEVICE_PROTOCOL *This,\r | |
313 | IN VIRTIO_MAP_OPERATION Operation,\r | |
314 | IN VOID *HostAddress,\r | |
315 | IN OUT UINTN *NumberOfBytes,\r | |
316 | OUT EFI_PHYSICAL_ADDRESS *DeviceAddress,\r | |
317 | OUT VOID **Mapping\r | |
318 | )\r | |
319 | {\r | |
320 | *DeviceAddress = (EFI_PHYSICAL_ADDRESS) (UINTN) HostAddress;\r | |
321 | *Mapping = NULL;\r | |
322 | \r | |
323 | return EFI_SUCCESS;\r | |
324 | }\r | |
325 | \r | |
326 | EFI_STATUS\r | |
327 | EFIAPI\r | |
328 | VirtioPciUnmapSharedBuffer (\r | |
329 | IN VIRTIO_DEVICE_PROTOCOL *This,\r | |
330 | IN VOID *Mapping\r | |
331 | )\r | |
332 | {\r | |
333 | return EFI_SUCCESS;\r | |
334 | }\r |