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6fb4e772 OM |
1 | /** @file\r |
2 | \r | |
3 | This driver produces Virtio Device Protocol instances for Virtio MMIO 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 | \r | |
b26f0cf9 | 9 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
6fb4e772 OM |
10 | \r |
11 | **/\r | |
12 | \r | |
13 | #include "VirtioMmioDevice.h"\r | |
14 | \r | |
15 | EFI_STATUS\r | |
16 | EFIAPI\r | |
17 | VirtioMmioGetDeviceFeatures (\r | |
18 | IN VIRTIO_DEVICE_PROTOCOL *This,\r | |
bc8fde6f | 19 | OUT UINT64 *DeviceFeatures\r |
6fb4e772 OM |
20 | )\r |
21 | {\r | |
22 | VIRTIO_MMIO_DEVICE *Device;\r | |
23 | \r | |
24 | if (DeviceFeatures == NULL) {\r | |
25 | return EFI_INVALID_PARAMETER;\r | |
26 | }\r | |
27 | \r | |
28 | Device = VIRTIO_MMIO_DEVICE_FROM_VIRTIO_DEVICE (This);\r | |
29 | \r | |
30 | *DeviceFeatures = VIRTIO_CFG_READ (Device, VIRTIO_MMIO_OFFSET_HOST_FEATURES);\r | |
31 | \r | |
32 | return EFI_SUCCESS;\r | |
33 | }\r | |
34 | \r | |
6fb4e772 OM |
35 | EFI_STATUS\r |
36 | EFIAPI\r | |
37 | VirtioMmioGetQueueSize (\r | |
38 | IN VIRTIO_DEVICE_PROTOCOL *This,\r | |
39 | OUT UINT16 *QueueNumMax\r | |
40 | )\r | |
41 | {\r | |
42 | VIRTIO_MMIO_DEVICE *Device;\r | |
43 | \r | |
44 | if (QueueNumMax == NULL) {\r | |
45 | return EFI_INVALID_PARAMETER;\r | |
46 | }\r | |
47 | \r | |
48 | Device = VIRTIO_MMIO_DEVICE_FROM_VIRTIO_DEVICE (This);\r | |
49 | \r | |
50 | *QueueNumMax = VIRTIO_CFG_READ (Device, VIRTIO_MMIO_OFFSET_QUEUE_NUM_MAX) & 0xFFFF;\r | |
51 | \r | |
52 | return EFI_SUCCESS;\r | |
53 | }\r | |
54 | \r | |
55 | EFI_STATUS\r | |
56 | EFIAPI\r | |
57 | VirtioMmioGetDeviceStatus (\r | |
58 | IN VIRTIO_DEVICE_PROTOCOL *This,\r | |
59 | OUT UINT8 *DeviceStatus\r | |
60 | )\r | |
61 | {\r | |
62 | VIRTIO_MMIO_DEVICE *Device;\r | |
63 | \r | |
64 | if (DeviceStatus == NULL) {\r | |
65 | return EFI_INVALID_PARAMETER;\r | |
66 | }\r | |
67 | \r | |
68 | Device = VIRTIO_MMIO_DEVICE_FROM_VIRTIO_DEVICE (This);\r | |
69 | \r | |
70 | *DeviceStatus = VIRTIO_CFG_READ (Device, VIRTIO_MMIO_OFFSET_STATUS) & 0xFF;\r | |
71 | \r | |
72 | return EFI_SUCCESS;\r | |
73 | }\r | |
74 | \r | |
75 | EFI_STATUS\r | |
76 | EFIAPI\r | |
77 | VirtioMmioSetQueueSize (\r | |
22701a3d BS |
78 | IN VIRTIO_DEVICE_PROTOCOL *This,\r |
79 | IN UINT16 QueueSize\r | |
6fb4e772 OM |
80 | )\r |
81 | {\r | |
82 | VIRTIO_MMIO_DEVICE *Device;\r | |
83 | \r | |
84 | Device = VIRTIO_MMIO_DEVICE_FROM_VIRTIO_DEVICE (This);\r | |
85 | \r | |
86 | VIRTIO_CFG_WRITE (Device, VIRTIO_MMIO_OFFSET_QUEUE_NUM, QueueSize);\r | |
87 | \r | |
88 | return EFI_SUCCESS;\r | |
89 | }\r | |
90 | \r | |
91 | EFI_STATUS\r | |
92 | EFIAPI\r | |
93 | VirtioMmioSetDeviceStatus (\r | |
22701a3d BS |
94 | IN VIRTIO_DEVICE_PROTOCOL *This,\r |
95 | IN UINT8 DeviceStatus\r | |
6fb4e772 OM |
96 | )\r |
97 | {\r | |
98 | VIRTIO_MMIO_DEVICE *Device;\r | |
99 | \r | |
100 | Device = VIRTIO_MMIO_DEVICE_FROM_VIRTIO_DEVICE (This);\r | |
101 | \r | |
102 | VIRTIO_CFG_WRITE (Device, VIRTIO_MMIO_OFFSET_STATUS, DeviceStatus);\r | |
103 | \r | |
104 | return EFI_SUCCESS;\r | |
105 | }\r | |
106 | \r | |
107 | EFI_STATUS\r | |
108 | EFIAPI\r | |
109 | VirtioMmioSetQueueNotify (\r | |
22701a3d BS |
110 | IN VIRTIO_DEVICE_PROTOCOL *This,\r |
111 | IN UINT16 QueueNotify\r | |
6fb4e772 OM |
112 | )\r |
113 | {\r | |
114 | VIRTIO_MMIO_DEVICE *Device;\r | |
115 | \r | |
116 | Device = VIRTIO_MMIO_DEVICE_FROM_VIRTIO_DEVICE (This);\r | |
117 | \r | |
118 | VIRTIO_CFG_WRITE (Device, VIRTIO_MMIO_OFFSET_QUEUE_NOTIFY, QueueNotify);\r | |
119 | \r | |
120 | return EFI_SUCCESS;\r | |
121 | }\r | |
122 | \r | |
123 | EFI_STATUS\r | |
124 | EFIAPI\r | |
125 | VirtioMmioSetQueueAlignment (\r | |
22701a3d BS |
126 | IN VIRTIO_DEVICE_PROTOCOL *This,\r |
127 | IN UINT32 Alignment\r | |
6fb4e772 OM |
128 | )\r |
129 | {\r | |
130 | VIRTIO_MMIO_DEVICE *Device;\r | |
131 | \r | |
132 | Device = VIRTIO_MMIO_DEVICE_FROM_VIRTIO_DEVICE (This);\r | |
133 | \r | |
134 | VIRTIO_CFG_WRITE (Device, VIRTIO_MMIO_OFFSET_QUEUE_ALIGN, Alignment);\r | |
135 | \r | |
136 | return EFI_SUCCESS;\r | |
137 | }\r | |
138 | \r | |
139 | EFI_STATUS\r | |
140 | EFIAPI\r | |
141 | VirtioMmioSetPageSize (\r | |
22701a3d BS |
142 | IN VIRTIO_DEVICE_PROTOCOL *This,\r |
143 | IN UINT32 PageSize\r | |
6fb4e772 OM |
144 | )\r |
145 | {\r | |
146 | VIRTIO_MMIO_DEVICE *Device;\r | |
147 | \r | |
148 | if (PageSize != EFI_PAGE_SIZE) {\r | |
149 | return EFI_UNSUPPORTED;\r | |
150 | }\r | |
151 | \r | |
152 | Device = VIRTIO_MMIO_DEVICE_FROM_VIRTIO_DEVICE (This);\r | |
153 | \r | |
154 | VIRTIO_CFG_WRITE (Device, VIRTIO_MMIO_OFFSET_GUEST_PAGE_SIZE, PageSize);\r | |
155 | \r | |
156 | return EFI_SUCCESS;\r | |
157 | }\r | |
158 | \r | |
159 | EFI_STATUS\r | |
160 | EFIAPI\r | |
161 | VirtioMmioSetQueueSel (\r | |
22701a3d BS |
162 | IN VIRTIO_DEVICE_PROTOCOL *This,\r |
163 | IN UINT16 Sel\r | |
6fb4e772 OM |
164 | )\r |
165 | {\r | |
166 | VIRTIO_MMIO_DEVICE *Device;\r | |
167 | \r | |
168 | Device = VIRTIO_MMIO_DEVICE_FROM_VIRTIO_DEVICE (This);\r | |
169 | \r | |
170 | VIRTIO_CFG_WRITE (Device, VIRTIO_MMIO_OFFSET_QUEUE_SEL, Sel);\r | |
171 | \r | |
172 | return EFI_SUCCESS;\r | |
173 | }\r | |
174 | \r | |
175 | EFI_STATUS\r | |
176 | VirtioMmioSetQueueAddress (\r | |
07af4eee | 177 | IN VIRTIO_DEVICE_PROTOCOL *This,\r |
53a4c604 BS |
178 | IN VRING *Ring,\r |
179 | IN UINT64 RingBaseShift\r | |
6fb4e772 OM |
180 | )\r |
181 | {\r | |
182 | VIRTIO_MMIO_DEVICE *Device;\r | |
183 | \r | |
53a4c604 BS |
184 | ASSERT (RingBaseShift == 0);\r |
185 | \r | |
6fb4e772 OM |
186 | Device = VIRTIO_MMIO_DEVICE_FROM_VIRTIO_DEVICE (This);\r |
187 | \r | |
07af4eee LE |
188 | VIRTIO_CFG_WRITE (Device, VIRTIO_MMIO_OFFSET_QUEUE_PFN,\r |
189 | (UINT32)((UINTN)Ring->Base >> EFI_PAGE_SHIFT));\r | |
6fb4e772 OM |
190 | \r |
191 | return EFI_SUCCESS;\r | |
192 | }\r | |
193 | \r | |
194 | EFI_STATUS\r | |
195 | EFIAPI\r | |
196 | VirtioMmioSetGuestFeatures (\r | |
22701a3d BS |
197 | IN VIRTIO_DEVICE_PROTOCOL *This,\r |
198 | IN UINT64 Features\r | |
6fb4e772 OM |
199 | )\r |
200 | {\r | |
201 | VIRTIO_MMIO_DEVICE *Device;\r | |
202 | \r | |
203 | Device = VIRTIO_MMIO_DEVICE_FROM_VIRTIO_DEVICE (This);\r | |
204 | \r | |
bc8fde6f LE |
205 | if (Features > MAX_UINT32) {\r |
206 | return EFI_UNSUPPORTED;\r | |
207 | }\r | |
208 | VIRTIO_CFG_WRITE (Device, VIRTIO_MMIO_OFFSET_GUEST_FEATURES,\r | |
209 | (UINT32)Features);\r | |
6fb4e772 OM |
210 | \r |
211 | return EFI_SUCCESS;\r | |
212 | }\r | |
213 | \r | |
214 | EFI_STATUS\r | |
215 | EFIAPI\r | |
216 | VirtioMmioDeviceWrite (\r | |
217 | IN VIRTIO_DEVICE_PROTOCOL *This,\r | |
218 | IN UINTN FieldOffset,\r | |
219 | IN UINTN FieldSize,\r | |
220 | IN UINT64 Value\r | |
221 | )\r | |
222 | {\r | |
223 | UINTN DstBaseAddress;\r | |
224 | VIRTIO_MMIO_DEVICE *Device;\r | |
225 | \r | |
226 | Device = VIRTIO_MMIO_DEVICE_FROM_VIRTIO_DEVICE (This);\r | |
227 | \r | |
228 | //\r | |
229 | // Double-check fieldsize\r | |
230 | //\r | |
231 | if ((FieldSize != 1) && (FieldSize != 2) &&\r | |
232 | (FieldSize != 4) && (FieldSize != 8)) {\r | |
233 | return EFI_INVALID_PARAMETER;\r | |
234 | }\r | |
235 | \r | |
236 | //\r | |
237 | // Compute base address\r | |
238 | //\r | |
239 | DstBaseAddress = Device->BaseAddress +\r | |
240 | VIRTIO_DEVICE_SPECIFIC_CONFIGURATION_OFFSET_MMIO + FieldOffset;\r | |
241 | \r | |
242 | //\r | |
243 | // The device-specific memory area of Virtio-MMIO can only be written in\r | |
244 | // byte accesses. This is not currently in the Virtio spec.\r | |
245 | //\r | |
246 | MmioWriteBuffer8 (DstBaseAddress, FieldSize, (UINT8*)&Value);\r | |
247 | \r | |
248 | return EFI_SUCCESS;\r | |
249 | }\r | |
250 | \r | |
251 | EFI_STATUS\r | |
252 | EFIAPI\r | |
253 | VirtioMmioDeviceRead (\r | |
254 | IN VIRTIO_DEVICE_PROTOCOL *This,\r | |
255 | IN UINTN FieldOffset,\r | |
256 | IN UINTN FieldSize,\r | |
257 | IN UINTN BufferSize,\r | |
258 | OUT VOID *Buffer\r | |
259 | )\r | |
260 | {\r | |
261 | UINTN SrcBaseAddress;\r | |
262 | VIRTIO_MMIO_DEVICE *Device;\r | |
263 | \r | |
264 | Device = VIRTIO_MMIO_DEVICE_FROM_VIRTIO_DEVICE (This);\r | |
265 | \r | |
266 | //\r | |
267 | // Parameter validation\r | |
268 | //\r | |
269 | ASSERT (FieldSize == BufferSize);\r | |
270 | \r | |
271 | //\r | |
272 | // Double-check fieldsize\r | |
273 | //\r | |
274 | if ((FieldSize != 1) && (FieldSize != 2) &&\r | |
275 | (FieldSize != 4) && (FieldSize != 8)) {\r | |
276 | return EFI_INVALID_PARAMETER;\r | |
277 | }\r | |
278 | \r | |
279 | //\r | |
280 | // Compute base address\r | |
281 | //\r | |
282 | SrcBaseAddress = Device->BaseAddress +\r | |
283 | VIRTIO_DEVICE_SPECIFIC_CONFIGURATION_OFFSET_MMIO + FieldOffset;\r | |
284 | \r | |
285 | //\r | |
286 | // The device-specific memory area of Virtio-MMIO can only be read in\r | |
287 | // byte reads. This is not currently in the Virtio spec.\r | |
288 | //\r | |
289 | MmioReadBuffer8 (SrcBaseAddress, BufferSize, Buffer);\r | |
290 | \r | |
291 | return EFI_SUCCESS;\r | |
292 | }\r | |
084cfc1a BS |
293 | \r |
294 | EFI_STATUS\r | |
295 | EFIAPI\r | |
296 | VirtioMmioAllocateSharedPages (\r | |
297 | IN VIRTIO_DEVICE_PROTOCOL *This,\r | |
298 | IN UINTN NumPages,\r | |
299 | OUT VOID **HostAddress\r | |
300 | )\r | |
301 | {\r | |
302 | VOID *Buffer;\r | |
303 | \r | |
304 | Buffer = AllocatePages (NumPages);\r | |
305 | if (Buffer == NULL) {\r | |
306 | return EFI_OUT_OF_RESOURCES;\r | |
307 | }\r | |
308 | \r | |
309 | *HostAddress = Buffer;\r | |
310 | return EFI_SUCCESS;\r | |
311 | }\r | |
312 | \r | |
313 | VOID\r | |
314 | EFIAPI\r | |
315 | VirtioMmioFreeSharedPages (\r | |
316 | IN VIRTIO_DEVICE_PROTOCOL *This,\r | |
317 | IN UINTN NumPages,\r | |
318 | IN VOID *HostAddress\r | |
319 | )\r | |
320 | {\r | |
321 | FreePages (HostAddress, NumPages);\r | |
322 | }\r | |
323 | \r | |
324 | EFI_STATUS\r | |
325 | EFIAPI\r | |
326 | VirtioMmioMapSharedBuffer (\r | |
327 | IN VIRTIO_DEVICE_PROTOCOL *This,\r | |
328 | IN VIRTIO_MAP_OPERATION Operation,\r | |
329 | IN VOID *HostAddress,\r | |
330 | IN OUT UINTN *NumberOfBytes,\r | |
331 | OUT EFI_PHYSICAL_ADDRESS *DeviceAddress,\r | |
332 | OUT VOID **Mapping\r | |
333 | )\r | |
334 | {\r | |
335 | *DeviceAddress = (EFI_PHYSICAL_ADDRESS) (UINTN) HostAddress;\r | |
336 | *Mapping = NULL;\r | |
337 | \r | |
338 | return EFI_SUCCESS;\r | |
339 | }\r | |
340 | \r | |
341 | EFI_STATUS\r | |
342 | EFIAPI\r | |
343 | VirtioMmioUnmapSharedBuffer (\r | |
344 | IN VIRTIO_DEVICE_PROTOCOL *This,\r | |
345 | IN VOID *Mapping\r | |
346 | )\r | |
347 | {\r | |
348 | return EFI_SUCCESS;\r | |
349 | }\r |