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