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
|
/* $Id: HGSMIHostCmd.cpp $ */
/** @file
* VirtualBox Video driver, common code - HGSMI host-to-guest communication.
*/
/*
* Copyright (C) 2006-2019 Oracle Corporation
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
#include <VBoxVideoGuest.h>
#include <VBoxVideoVBE.h>
#include <VBoxVideoIPRT.h>
#include <HGSMIHostCmd.h>
/**
* Initialise the host context structure.
*
* @param pCtx the context structure to initialise
* @param pvBaseMapping where the basic HGSMI structures are mapped at
* @param offHostFlags the offset of the host flags into the basic HGSMI
* structures
* @param pvHostAreaMapping where the area for the host heap is mapped at
* @param offVRAMHostArea offset of the host heap area into VRAM
* @param cbHostArea size in bytes of the host heap area
*/
DECLHIDDEN(void) VBoxHGSMISetupHostContext(PHGSMIHOSTCOMMANDCONTEXT pCtx,
void *pvBaseMapping,
uint32_t offHostFlags,
void *pvHostAreaMapping,
uint32_t offVRAMHostArea,
uint32_t cbHostArea)
{
uint8_t *pu8HostFlags = ((uint8_t *)pvBaseMapping) + offHostFlags;
pCtx->pfHostFlags = (HGSMIHOSTFLAGS *)pu8HostFlags;
/** @todo should we really be using a fixed ISA port value here? */
pCtx->port = (RTIOPORT)VGA_PORT_HGSMI_HOST;
HGSMIAreaInitialize(&pCtx->areaCtx, pvHostAreaMapping, cbHostArea,
offVRAMHostArea);
}
/** Send completion notification to the host for the command located at offset
* @a offt into the host command buffer. */
static void HGSMINotifyHostCmdComplete(PHGSMIHOSTCOMMANDCONTEXT pCtx, HGSMIOFFSET offt)
{
VBVO_PORT_WRITE_U32(pCtx->port, offt);
}
/**
* Inform the host that a command has been handled.
*
* @param pCtx the context containing the heap to be used
* @param pvMem pointer into the heap as mapped in @a pCtx to the command to
* be completed
*/
DECLHIDDEN(void) VBoxHGSMIHostCmdComplete(PHGSMIHOSTCOMMANDCONTEXT pCtx, void RT_UNTRUSTED_VOLATILE_HOST *pvMem)
{
HGSMIBUFFERHEADER RT_UNTRUSTED_VOLATILE_GUEST *pHdr = HGSMIBufferHeaderFromData(pvMem);
HGSMIOFFSET offMem = HGSMIPointerToOffset(&pCtx->areaCtx, pHdr);
Assert(offMem != HGSMIOFFSET_VOID);
if (offMem != HGSMIOFFSET_VOID)
HGSMINotifyHostCmdComplete(pCtx, offMem);
}
/** Submit an incoming host command to the appropriate handler. */
static void hgsmiHostCmdProcess(PHGSMIHOSTCOMMANDCONTEXT pCtx,
HGSMIOFFSET offBuffer)
{
int rc = HGSMIBufferProcess(&pCtx->areaCtx, &pCtx->channels, offBuffer);
Assert(!RT_FAILURE(rc));
if(RT_FAILURE(rc))
{
/* failure means the command was not submitted to the handler for some reason
* it's our responsibility to notify its completion in this case */
HGSMINotifyHostCmdComplete(pCtx, offBuffer);
}
/* if the cmd succeeded it's responsibility of the callback to complete it */
}
/** Get the next command from the host. */
static HGSMIOFFSET hgsmiGetHostBuffer(PHGSMIHOSTCOMMANDCONTEXT pCtx)
{
return VBVO_PORT_READ_U32(pCtx->port);
}
/** Get and handle the next command from the host. */
static void hgsmiHostCommandQueryProcess(PHGSMIHOSTCOMMANDCONTEXT pCtx)
{
HGSMIOFFSET offset = hgsmiGetHostBuffer(pCtx);
AssertReturnVoid(offset != HGSMIOFFSET_VOID);
hgsmiHostCmdProcess(pCtx, offset);
}
/** Drain the host command queue. */
DECLHIDDEN(void) VBoxHGSMIProcessHostQueue(PHGSMIHOSTCOMMANDCONTEXT pCtx)
{
while (pCtx->pfHostFlags->u32HostFlags & HGSMIHOSTFLAGS_COMMANDS_PENDING)
{
if (!ASMAtomicCmpXchgBool(&pCtx->fHostCmdProcessing, true, false))
return;
hgsmiHostCommandQueryProcess(pCtx);
ASMAtomicWriteBool(&pCtx->fHostCmdProcessing, false);
}
}
/** Tell the host about the location of the area of VRAM set aside for the host
* heap. */
static int vboxHGSMIReportHostArea(PHGSMIGUESTCOMMANDCONTEXT pCtx,
uint32_t u32AreaOffset, uint32_t u32AreaSize)
{
VBVAINFOHEAP *p;
int rc = VINF_SUCCESS;
/* Allocate the IO buffer. */
p = (VBVAINFOHEAP *)VBoxHGSMIBufferAlloc(pCtx,
sizeof (VBVAINFOHEAP), HGSMI_CH_VBVA,
VBVA_INFO_HEAP);
if (p)
{
/* Prepare data to be sent to the host. */
p->u32HeapOffset = u32AreaOffset;
p->u32HeapSize = u32AreaSize;
rc = VBoxHGSMIBufferSubmit(pCtx, p);
/* Free the IO buffer. */
VBoxHGSMIBufferFree(pCtx, p);
}
else
rc = VERR_NO_MEMORY;
return rc;
}
/**
* Get the information needed to map the area used by the host to send back
* requests.
*
* @param pCtx the context containing the heap to use
* @param cbVRAM how much video RAM is allocated to the device
* @param offVRAMBaseMapping the offset of the basic communication structures
* into the guest's VRAM
* @param poffVRAMHostArea where to store the offset into VRAM of the host
* heap area
* @param pcbHostArea where to store the size of the host heap area
*/
DECLHIDDEN(void) VBoxHGSMIGetHostAreaMapping(PHGSMIGUESTCOMMANDCONTEXT pCtx,
uint32_t cbVRAM,
uint32_t offVRAMBaseMapping,
uint32_t *poffVRAMHostArea,
uint32_t *pcbHostArea)
{
uint32_t offVRAMHostArea = offVRAMBaseMapping, cbHostArea = 0;
AssertPtrReturnVoid(poffVRAMHostArea);
AssertPtrReturnVoid(pcbHostArea);
VBoxQueryConfHGSMI(pCtx, VBOX_VBVA_CONF32_HOST_HEAP_SIZE, &cbHostArea);
if (cbHostArea != 0)
{
uint32_t cbHostAreaMaxSize = cbVRAM / 4;
/** @todo what is the idea of this? */
if (cbHostAreaMaxSize >= VBVA_ADAPTER_INFORMATION_SIZE)
{
cbHostAreaMaxSize -= VBVA_ADAPTER_INFORMATION_SIZE;
}
if (cbHostArea > cbHostAreaMaxSize)
{
cbHostArea = cbHostAreaMaxSize;
}
/* Round up to 4096 bytes. */
cbHostArea = (cbHostArea + 0xFFF) & ~0xFFF;
offVRAMHostArea = offVRAMBaseMapping - cbHostArea;
}
*pcbHostArea = cbHostArea;
*poffVRAMHostArea = offVRAMHostArea;
// LogFunc(("offVRAMHostArea = 0x%08X, cbHostArea = 0x%08X\n",
// offVRAMHostArea, cbHostArea));
}
/**
* Tell the host about the ways it can use to communicate back to us via an
* HGSMI command
*
* @returns iprt status value
* @param pCtx the context containing the heap to use
* @param offVRAMFlagsLocation where we wish the host to place its flags
* relative to the start of the VRAM
* @param fCaps additions HGSMI capabilities the guest
* supports
* @param offVRAMHostArea offset into VRAM of the host heap area
* @param cbHostArea size in bytes of the host heap area
*/
DECLHIDDEN(int) VBoxHGSMISendHostCtxInfo(PHGSMIGUESTCOMMANDCONTEXT pCtx,
HGSMIOFFSET offVRAMFlagsLocation,
uint32_t fCaps,
uint32_t offVRAMHostArea,
uint32_t cbHostArea)
{
// Log(("VBoxVideo::vboxSetupAdapterInfo\n"));
/* setup the flags first to ensure they are initialized by the time the
* host heap is ready */
int rc = VBoxHGSMIReportFlagsLocation(pCtx, offVRAMFlagsLocation);
AssertRC(rc);
if (RT_SUCCESS(rc) && fCaps)
{
/* Inform about caps */
rc = VBoxHGSMISendCapsInfo(pCtx, fCaps);
AssertRC(rc);
}
if (RT_SUCCESS (rc))
{
/* Report the host heap location. */
rc = vboxHGSMIReportHostArea(pCtx, offVRAMHostArea, cbHostArea);
AssertRC(rc);
}
// Log(("VBoxVideo::vboxSetupAdapterInfo finished rc = %d\n", rc));
return rc;
}
|
