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
|
/* $Id: DevPciMerge1.cpp.h $ */
/** @file
* DevPci - Early attempt at common code for DevPci and DevPciIch9.
*
* @note Don't add more, add code to DevPciIch9.cpp instead.
* @note We'll keep this file like this for a little while longer
* because of 5.1.
*/
/*
* Copyright (C) 2004-2019 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*/
/**
* Search for a completely unused device entry (all 8 functions are unused).
*
* @returns VBox status code.
* @param pBus The bus to register with.
* @remarks Caller enters the PDM critical section.
*/
static uint8_t pciR3MergedFindUnusedDeviceNo(PDEVPCIBUS pBus)
{
for (uint8_t uPciDevNo = pBus->iDevSearch >> VBOX_PCI_DEVFN_DEV_SHIFT; uPciDevNo < VBOX_PCI_MAX_DEVICES; uPciDevNo++)
if ( !pBus->apDevices[VBOX_PCI_DEVFN_MAKE(uPciDevNo, 0)]
&& !pBus->apDevices[VBOX_PCI_DEVFN_MAKE(uPciDevNo, 1)]
&& !pBus->apDevices[VBOX_PCI_DEVFN_MAKE(uPciDevNo, 2)]
&& !pBus->apDevices[VBOX_PCI_DEVFN_MAKE(uPciDevNo, 3)]
&& !pBus->apDevices[VBOX_PCI_DEVFN_MAKE(uPciDevNo, 4)]
&& !pBus->apDevices[VBOX_PCI_DEVFN_MAKE(uPciDevNo, 5)]
&& !pBus->apDevices[VBOX_PCI_DEVFN_MAKE(uPciDevNo, 6)]
&& !pBus->apDevices[VBOX_PCI_DEVFN_MAKE(uPciDevNo, 7)])
return uPciDevNo;
return UINT8_MAX;
}
/**
* Registers the device with the specified PCI bus.
*
* This is shared between the pci bus and pci bridge code.
*
* @returns VBox status code.
* @param pBus The bus to register with.
* @param pPciDev The PCI device structure.
* @param fFlags Reserved for future use, PDMPCIDEVREG_F_MBZ.
* @param uPciDevNo PDMPCIDEVREG_DEV_NO_FIRST_UNUSED, or a specific
* device number (0-31).
* @param uPciFunNo PDMPCIDEVREG_FUN_NO_FIRST_UNUSED, or a specific
* function number (0-7).
* @param pszName Device name (static but not unique).
* @param pfnConfigRead The default config read method.
* @param pfnConfigWrite The default config read method.
*
* @remarks Caller enters the PDM critical section.
*/
static int pciR3MergedRegisterDeviceOnBus(PDEVPCIBUS pBus, PPDMPCIDEV pPciDev, uint32_t fFlags,
uint8_t uPciDevNo, uint8_t uPciFunNo, const char *pszName,
PFNPCICONFIGREAD pfnConfigRead, PFNPCICONFIGWRITE pfnConfigWrite)
{
/*
* Validate input.
*/
AssertPtrReturn(pszName, VERR_INVALID_POINTER);
AssertPtrReturn(pPciDev, VERR_INVALID_POINTER);
AssertReturn(!(fFlags & ~PDMPCIDEVREG_F_VALID_MASK), VERR_INVALID_FLAGS);
AssertReturn(uPciDevNo < VBOX_PCI_MAX_DEVICES || uPciDevNo == PDMPCIDEVREG_DEV_NO_FIRST_UNUSED, VERR_INVALID_PARAMETER);
AssertReturn(uPciFunNo < VBOX_PCI_MAX_FUNCTIONS || uPciFunNo == PDMPCIDEVREG_FUN_NO_FIRST_UNUSED, VERR_INVALID_PARAMETER);
/*
* Assign device & function numbers.
*/
/* Work the optional assignment flag. */
if (fFlags & PDMPCIDEVREG_F_NOT_MANDATORY_NO)
{
AssertLogRelMsgReturn(uPciDevNo < VBOX_PCI_MAX_DEVICES && uPciFunNo < VBOX_PCI_MAX_FUNCTIONS,
("PDMPCIDEVREG_F_NOT_MANDATORY_NO not implemented for #Dev=%#x / #Fun=%#x\n", uPciDevNo, uPciFunNo),
VERR_NOT_IMPLEMENTED);
if (pBus->apDevices[VBOX_PCI_DEVFN_MAKE(uPciDevNo, uPciFunNo)])
{
uPciDevNo = PDMPCIDEVREG_DEV_NO_FIRST_UNUSED;
uPciFunNo = PDMPCIDEVREG_FUN_NO_FIRST_UNUSED;
}
}
if (uPciDevNo == PDMPCIDEVREG_DEV_NO_FIRST_UNUSED)
{
/* Just find the next unused device number and we're good. */
uPciDevNo = pciR3MergedFindUnusedDeviceNo(pBus);
AssertLogRelMsgReturn(uPciDevNo < VBOX_PCI_MAX_DEVICES, ("Couldn't find a free spot!\n"), VERR_PDM_TOO_PCI_MANY_DEVICES);
if (uPciFunNo == PDMPCIDEVREG_FUN_NO_FIRST_UNUSED)
uPciFunNo = 0;
}
else
{
/*
* Direct assignment of device number can be more complicated.
*/
PPDMPCIDEV pClash;
if (uPciFunNo != PDMPCIDEVREG_FUN_NO_FIRST_UNUSED)
{
/* In the case of a specified function, we only relocate an existing
device if it belongs to a different device instance. Reasoning is
that the device should figure out it's own function assignments.
Note! We could make this more flexible by relocating functions assigned
via PDMPCIDEVREG_FUN_NO_FIRST_UNUSED, but it can wait till it's needed. */
pClash = pBus->apDevices[VBOX_PCI_DEVFN_MAKE(uPciDevNo, uPciFunNo)];
if (!pClash)
{ /* likely */ }
else if (pClash->Int.s.pDevInsR3 == pPciDev->Int.s.pDevInsR3)
AssertLogRelMsgFailedReturn(("PCI Configuration conflict at %u.%u: %s vs %s (same pDevIns)!\n",
uPciDevNo, uPciFunNo, pClash->pszNameR3, pszName),
VERR_PDM_TOO_PCI_MANY_DEVICES);
else if (!pClash->Int.s.fReassignableDevNo)
AssertLogRelMsgFailedReturn(("PCI Configuration conflict at %u.%u: %s vs %s (different pDevIns)!\n",
uPciDevNo, uPciFunNo, pClash->pszNameR3, pszName),
VERR_PDM_TOO_PCI_MANY_DEVICES);
}
else
{
/* First unused function slot. Again, we only relocate the whole
thing if all the device instance differs, because we otherwise
reason that a device should manage its own functions correctly. */
unsigned cSameDevInses = 0;
for (uPciFunNo = 0, pClash = NULL; uPciFunNo < VBOX_PCI_MAX_FUNCTIONS; uPciFunNo++)
{
pClash = pBus->apDevices[VBOX_PCI_DEVFN_MAKE(uPciDevNo, uPciFunNo)];
if (!pClash)
break;
cSameDevInses += pClash->Int.s.pDevInsR3 == pPciDev->Int.s.pDevInsR3;
}
if (!pClash)
Assert(uPciFunNo < VBOX_PCI_MAX_FUNCTIONS);
else
AssertLogRelMsgReturn(cSameDevInses == 0,
("PCI Configuration conflict at %u.* appending %s (%u of %u pDevIns matches)!\n",
uPciDevNo, pszName, cSameDevInses, VBOX_PCI_MAX_FUNCTIONS),
VERR_PDM_TOO_PCI_MANY_DEVICES);
}
if (pClash)
{
/*
* Try relocate the existing device.
*/
/* Check that all functions can be moved. */
for (uint8_t uMoveFun = 0; uMoveFun < VBOX_PCI_MAX_FUNCTIONS; uMoveFun++)
{
PPDMPCIDEV pMovePciDev = pBus->apDevices[VBOX_PCI_DEVFN_MAKE(uPciDevNo, uMoveFun)];
AssertLogRelMsgReturn(!pMovePciDev || pMovePciDev->Int.s.fReassignableDevNo,
("PCI Configuration conflict at %u.%u: %s vs %s\n",
uPciDevNo, uMoveFun, pMovePciDev->pszNameR3, pszName),
VERR_PDM_TOO_PCI_MANY_DEVICES);
}
/* Find a free device number to move it to. */
uint8_t uMoveToDevNo = pciR3MergedFindUnusedDeviceNo(pBus);
Assert(uMoveToDevNo != uPciFunNo);
AssertLogRelMsgReturn(uMoveToDevNo < VBOX_PCI_MAX_DEVICES,
("No space to relocate device at %u so '%s' can be placed there instead!\n", uPciFunNo, pszName),
VERR_PDM_TOO_PCI_MANY_DEVICES);
/* Execute the move. */
for (uint8_t uMoveFun = 0; uMoveFun < VBOX_PCI_MAX_FUNCTIONS; uMoveFun++)
{
PPDMPCIDEV pMovePciDev = pBus->apDevices[VBOX_PCI_DEVFN_MAKE(uPciDevNo, uMoveFun)];
if (pMovePciDev)
{
Log(("PCI: Relocating '%s' from %u.%u to %u.%u.\n", pMovePciDev->pszNameR3, uPciDevNo, uMoveFun, uMoveToDevNo, uMoveFun));
pBus->apDevices[VBOX_PCI_DEVFN_MAKE(uPciDevNo, uMoveFun)] = NULL;
pBus->apDevices[VBOX_PCI_DEVFN_MAKE(uMoveToDevNo, uMoveFun)] = pMovePciDev;
pMovePciDev->uDevFn = VBOX_PCI_DEVFN_MAKE(uMoveToDevNo, uMoveFun);
}
}
}
}
/*
* Now, initialize the rest of the PCI device structure.
*/
Assert(!pBus->apDevices[VBOX_PCI_DEVFN_MAKE(uPciDevNo, uPciFunNo)]);
pBus->apDevices[VBOX_PCI_DEVFN_MAKE(uPciDevNo, uPciFunNo)] = pPciDev;
pPciDev->uDevFn = VBOX_PCI_DEVFN_MAKE(uPciDevNo, uPciFunNo);
pPciDev->Int.s.pBusR3 = pBus;
pPciDev->Int.s.pBusR0 = MMHyperR3ToR0(PDMDevHlpGetVM(pBus->CTX_SUFF(pDevIns)), pBus);
pPciDev->Int.s.pBusRC = MMHyperR3ToRC(PDMDevHlpGetVM(pBus->CTX_SUFF(pDevIns)), pBus);
pPciDev->Int.s.pfnConfigRead = pfnConfigRead;
pPciDev->Int.s.pfnConfigWrite = pfnConfigWrite;
/* Remember and mark bridges. */
if (fFlags & PDMPCIDEVREG_F_PCI_BRIDGE)
{
AssertLogRelMsgReturn(pBus->cBridges < RT_ELEMENTS(pBus->apDevices),
("Number of bridges exceeds the number of possible devices on the bus\n"),
VERR_INTERNAL_ERROR_3);
pBus->papBridgesR3[pBus->cBridges++] = pPciDev;
pciDevSetPci2PciBridge(pPciDev);
}
Log(("PCI: Registered device %d function %d (%#x) '%s'.\n",
uPciDevNo, uPciFunNo, UINT32_C(0x80000000) | (pPciDev->uDevFn << 8), pszName));
return VINF_SUCCESS;
}
/**
* @interface_method_impl{PDMPCIBUSREG,pfnRegisterR3}
*/
static DECLCALLBACK(int) pciR3MergedRegister(PPDMDEVINS pDevIns, PPDMPCIDEV pPciDev, uint32_t fFlags,
uint8_t uPciDevNo, uint8_t uPciFunNo, const char *pszName)
{
PDEVPCIBUS pBus = PDMINS_2_DATA(pDevIns, PDEVPCIBUS);
AssertCompileMemberOffset(DEVPCIROOT, PciBus, 0);
return pciR3MergedRegisterDeviceOnBus(pBus, pPciDev, fFlags, uPciDevNo, uPciFunNo, pszName,
devpciR3CommonDefaultConfigRead, devpciR3CommonDefaultConfigWrite);
}
/**
* @interface_method_impl{PDMPCIBUSREG,pfnRegisterR3}
*/
static DECLCALLBACK(int) pcibridgeR3MergedRegisterDevice(PPDMDEVINS pDevIns, PPDMPCIDEV pPciDev, uint32_t fFlags,
uint8_t uPciDevNo, uint8_t uPciFunNo, const char *pszName)
{
PDEVPCIBUS pBus = PDMINS_2_DATA(pDevIns, PDEVPCIBUS);
return pciR3MergedRegisterDeviceOnBus(pBus, pPciDev, fFlags, uPciDevNo, uPciFunNo, pszName,
devpciR3CommonDefaultConfigRead, devpciR3CommonDefaultConfigWrite);
}
|
