ReactOS  0.4.11-dev-195-gef016bf
MmMdl.c
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1 /*
2  * PROJECT: ReactOS kernel-mode tests
3  * LICENSE: LGPLv2.1+ - See COPYING.LIB in the top level directory
4  * PURPOSE: Kernel-Mode Test Suite MDL test
5  * PROGRAMMER: Thomas Faber <thomas.faber@reactos.org>
6  */
7 
8 #include <kmt_test.h>
9 
10 static
11 VOID
12 TestMmAllocatePagesForMdl(VOID)
13 {
14  PMDL Mdl;
15  PHYSICAL_ADDRESS LowAddress;
16  PHYSICAL_ADDRESS HighAddress;
17  PHYSICAL_ADDRESS SkipBytes;
18  PVOID SystemVa;
19  PMDL Mdls[32];
20  PVOID SystemVas[32];
21  ULONG i;
22  PPFN_NUMBER MdlPages;
23  ULONG MdlPageCount;
24 
25  LowAddress.QuadPart = 0;
26  HighAddress.QuadPart = -1;
27  SkipBytes.QuadPart = 0;
28  /* simple allocate/free */
29  Mdl = MmAllocatePagesForMdl(LowAddress,
30  HighAddress,
31  SkipBytes,
32  2 * 1024 * 1024);
33  ok(Mdl != NULL, "MmAllocatePagesForMdl failed\n");
34  if (skip(Mdl != NULL, "No Mdl\n"))
35  return;
36  ok(MmGetMdlByteCount(Mdl) == 2 * 1024 * 1024, "Byte count: %lu\n", MmGetMdlByteCount(Mdl));
37  ok(MmGetMdlVirtualAddress(Mdl) == NULL, "Virtual address: %p\n", MmGetMdlVirtualAddress(Mdl));
38  ok(!(Mdl->MdlFlags & MDL_MAPPED_TO_SYSTEM_VA), "MdlFlags: %lx\n", Mdl->MdlFlags);
39  MdlPages = MmGetMdlPfnArray(Mdl);
40  MdlPageCount = ADDRESS_AND_SIZE_TO_SPAN_PAGES(MmGetMdlVirtualAddress(Mdl), MmGetMdlByteCount(Mdl));
41  ok(MdlPageCount == 2 * 1024 * 1024 / PAGE_SIZE, "MdlPageCount = %lu\n", MdlPageCount);
42  for (i = 0; i < MdlPageCount; i++)
43  {
44  ok(MdlPages[i] != 0 && MdlPages[i] != (PFN_NUMBER)-1,
45  "MdlPages[%lu] = 0x%I64x\n", i, (ULONGLONG)MdlPages[i]);
46  }
47  MmFreePagesFromMdl(Mdl);
48  ExFreePoolWithTag(Mdl, 0);
49 
50  /* Now map/unmap it */
51  Mdl = MmAllocatePagesForMdl(LowAddress,
52  HighAddress,
53  SkipBytes,
54  2 * 1024 * 1024);
55  ok(Mdl != NULL, "MmAllocatePagesForMdl failed\n");
56  if (skip(Mdl != NULL, "No Mdl\n"))
57  return;
58  ok(MmGetMdlByteCount(Mdl) == 2 * 1024 * 1024, "Byte count: %lu\n", MmGetMdlByteCount(Mdl));
59  ok(MmGetMdlVirtualAddress(Mdl) == NULL, "Virtual address: %p\n", MmGetMdlVirtualAddress(Mdl));
60  ok(!(Mdl->MdlFlags & MDL_MAPPED_TO_SYSTEM_VA), "MdlFlags: %lx\n", Mdl->MdlFlags);
61  SystemVa = MmMapLockedPagesSpecifyCache(Mdl,
62  KernelMode,
63  MmCached,
64  NULL,
65  FALSE,
66  NormalPagePriority);
67  ok(SystemVa != NULL, "MmMapLockedPagesSpecifyCache failed\n");
68  if (!skip(SystemVa != NULL, "No system VA\n"))
69  {
70  ok(MmGetMdlByteCount(Mdl) == 2 * 1024 * 1024, "Byte count: %lu\n", MmGetMdlByteCount(Mdl));
71  ok(MmGetMdlVirtualAddress(Mdl) == NULL, "Virtual address: %p, System VA: %p\n", MmGetMdlVirtualAddress(Mdl), SystemVa);
72  ok(Mdl->MappedSystemVa == SystemVa, "MappedSystemVa: %p, System VA: %p\n", Mdl->MappedSystemVa, SystemVa);
73  ok((Mdl->MdlFlags & MDL_MAPPED_TO_SYSTEM_VA), "MdlFlags: %lx\n", Mdl->MdlFlags);
74  MmUnmapLockedPages(SystemVa, Mdl);
75  }
76  ok(MmGetMdlByteCount(Mdl) == 2 * 1024 * 1024, "Byte count: %lu\n", MmGetMdlByteCount(Mdl));
77  ok(MmGetMdlVirtualAddress(Mdl) == NULL, "Virtual address: %p\n", MmGetMdlVirtualAddress(Mdl));
78  ok(!(Mdl->MdlFlags & MDL_MAPPED_TO_SYSTEM_VA), "MdlFlags: %lx\n", Mdl->MdlFlags);
79  MmFreePagesFromMdl(Mdl);
80  ExFreePoolWithTag(Mdl, 0);
81 
82  /* Now map it, and free without unmapping */
83  Mdl = MmAllocatePagesForMdl(LowAddress,
84  HighAddress,
85  SkipBytes,
86  2 * 1024 * 1024);
87  ok(Mdl != NULL, "MmAllocatePagesForMdl failed\n");
88  if (skip(Mdl != NULL, "No Mdl\n"))
89  return;
90  ok(MmGetMdlByteCount(Mdl) == 2 * 1024 * 1024, "Byte count: %lu\n", MmGetMdlByteCount(Mdl));
91  ok(MmGetMdlVirtualAddress(Mdl) == NULL, "Virtual address: %p\n", MmGetMdlVirtualAddress(Mdl));
92  ok(!(Mdl->MdlFlags & MDL_MAPPED_TO_SYSTEM_VA), "MdlFlags: %lx\n", Mdl->MdlFlags);
93  SystemVa = MmMapLockedPagesSpecifyCache(Mdl,
94  KernelMode,
95  MmCached,
96  NULL,
97  FALSE,
98  NormalPagePriority);
99  ok(SystemVa != NULL, "MmMapLockedPagesSpecifyCache failed\n");
100  ok(MmGetMdlByteCount(Mdl) == 2 * 1024 * 1024, "Byte count: %lu\n", MmGetMdlByteCount(Mdl));
101  ok(MmGetMdlVirtualAddress(Mdl) == NULL, "Virtual address: %p, System VA: %p\n", MmGetMdlVirtualAddress(Mdl), SystemVa);
102  ok(Mdl->MappedSystemVa == SystemVa, "MappedSystemVa: %p, System VA: %p\n", Mdl->MappedSystemVa, SystemVa);
103  ok((Mdl->MdlFlags & MDL_MAPPED_TO_SYSTEM_VA), "MdlFlags: %lx\n", Mdl->MdlFlags);
104  MmFreePagesFromMdl(Mdl);
105  ExFreePoolWithTag(Mdl, 0);
106 
107  /* try to allocate 2 GB -- should succeed but not map */
108  Mdl = MmAllocatePagesForMdl(LowAddress,
109  HighAddress,
110  SkipBytes,
111  2UL * 1024 * 1024 * 1024);
112  ok(Mdl != NULL, "MmAllocatePagesForMdl failed for 2 GB\n");
113  if (Mdl != NULL)
114  {
115  ok(MmGetMdlByteCount(Mdl) != 2UL * 1024 * 1024 * 1024, "Byte count: %lu\n", MmGetMdlByteCount(Mdl));
116  ok(MmGetMdlVirtualAddress(Mdl) == NULL, "Virtual address: %p\n", MmGetMdlVirtualAddress(Mdl));
117  ok(!(Mdl->MdlFlags & MDL_MAPPED_TO_SYSTEM_VA), "MdlFlags: %lx\n", Mdl->MdlFlags);
118  MdlPages = MmGetMdlPfnArray(Mdl);
119  MdlPageCount = ADDRESS_AND_SIZE_TO_SPAN_PAGES(MmGetMdlVirtualAddress(Mdl), MmGetMdlByteCount(Mdl));
120  ok(MdlPageCount < 2UL * 1024 * 1024 * 1024 / PAGE_SIZE, "MdlPageCount = %lu\n", MdlPageCount);
121  for (i = 0; i < MdlPageCount; i++)
122  {
123  if (MdlPages[i] == 0 ||
124  MdlPages[i] == (PFN_NUMBER)-1)
125  {
126  ok(0, "MdlPages[%lu] = 0x%I64x\n", i, (ULONGLONG)MdlPages[i]);
127  }
128  }
129  SystemVa = MmMapLockedPagesSpecifyCache(Mdl,
130  KernelMode,
131  MmCached,
132  NULL,
133  FALSE,
134  NormalPagePriority);
135  ok(SystemVa == NULL, "MmMapLockedPagesSpecifyCache succeeded for 2 GB\n");
136  if (SystemVa != NULL)
137  MmUnmapLockedPages(SystemVa, Mdl);
138  ok(MmGetMdlByteCount(Mdl) != 2UL * 1024 * 1024 * 1024, "Byte count: %lu\n", MmGetMdlByteCount(Mdl));
139  ok(MmGetMdlVirtualAddress(Mdl) == NULL, "Virtual address: %p\n", MmGetMdlVirtualAddress(Mdl));
140  ok(!(Mdl->MdlFlags & MDL_MAPPED_TO_SYSTEM_VA), "MdlFlags: %lx\n", Mdl->MdlFlags);
141  MmFreePagesFromMdl(Mdl);
142  ExFreePoolWithTag(Mdl, 0);
143  }
144 
145  /* now allocate and map 32 MB Mdls until we fail */
146  for (i = 0; i < sizeof(Mdls) / sizeof(Mdls[0]); i++)
147  {
148  Mdls[i] = MmAllocatePagesForMdl(LowAddress,
149  HighAddress,
150  SkipBytes,
151  32 * 1024 * 1024);
152  if (Mdls[i] == NULL)
153  {
154  trace("MmAllocatePagesForMdl failed with i = %lu\n", i);
155  break;
156  }
157  ok(MmGetMdlVirtualAddress(Mdls[i]) == NULL, "Virtual address: %p\n", MmGetMdlVirtualAddress(Mdls[i]));
158  ok(!(Mdls[i]->MdlFlags & MDL_MAPPED_TO_SYSTEM_VA), "MdlFlags: %lx\n", Mdls[i]->MdlFlags);
159  SystemVas[i] = MmMapLockedPagesSpecifyCache(Mdls[i],
160  KernelMode,
161  MmCached,
162  NULL,
163  FALSE,
164  NormalPagePriority);
165  if (SystemVas[i] == NULL)
166  {
167  ok(MmGetMdlByteCount(Mdls[i]) <= 32 * 1024 * 1024, "Byte count: %lu\n", MmGetMdlByteCount(Mdls[i]));
168  ok(MmGetMdlVirtualAddress(Mdls[i]) == NULL, "Virtual address: %p\n", MmGetMdlVirtualAddress(Mdls[i]));
169  ok(!(Mdls[i]->MdlFlags & MDL_MAPPED_TO_SYSTEM_VA), "MdlFlags: %lx\n", Mdls[i]->MdlFlags);
170  trace("MmMapLockedPagesSpecifyCache failed with i = %lu\n", i);
171  break;
172  }
173  ok(MmGetMdlByteCount(Mdls[i]) == 32 * 1024 * 1024, "Byte count: %lu\n", MmGetMdlByteCount(Mdls[i]));
174  ok(MmGetMdlVirtualAddress(Mdls[i]) == NULL, "Virtual address: %p, System VA: %p\n", MmGetMdlVirtualAddress(Mdls[i]), SystemVas[i]);
175  ok(Mdls[i]->MappedSystemVa == SystemVas[i], "MappedSystemVa: %p\n", Mdls[i]->MappedSystemVa, SystemVas[i]);
176  ok((Mdls[i]->MdlFlags & MDL_MAPPED_TO_SYSTEM_VA), "MdlFlags: %lx\n", Mdls[i]->MdlFlags);
177  }
178  for (i = 0; i < sizeof(Mdls) / sizeof(Mdls[0]); i++)
179  {
180  if (Mdls[i] == NULL)
181  break;
182  if (SystemVas[i] != NULL)
183  MmUnmapLockedPages(SystemVas[i], Mdls[i]);
184  MmFreePagesFromMdl(Mdls[i]);
185  ExFreePoolWithTag(Mdls[i], 0);
186  if (SystemVas[i] == NULL)
187  break;
188  }
189 }
190 
191 static
192 VOID
193 TestMmBuildMdlForNonPagedPool(VOID)
194 {
195  PVOID Page;
196  PMDL Mdl;
197 
198  Page = ExAllocatePoolWithTag(PagedPool, PAGE_SIZE, 'Test');
199  ok(Page != NULL, "ExAllocatePoolWithTag failed\n");
200  if (skip(Page != NULL, "No buffer\n"))
201  return;
202 
203  Mdl = IoAllocateMdl(Page, PAGE_SIZE, FALSE, FALSE, NULL);
204  ok(Mdl != NULL, "IoAllocateMdl failed\n");
205  if (skip(Mdl != NULL, "No MDL\n"))
206  return;
207 
208  ok((Mdl->MdlFlags & MDL_PAGES_LOCKED) == 0, "MDL locked\n");
209  ok((Mdl->MdlFlags & MDL_SOURCE_IS_NONPAGED_POOL) == 0, "MDL from non paged\n");
210 
211  MmBuildMdlForNonPagedPool(Mdl);
212  ok((Mdl->MdlFlags & MDL_PAGES_LOCKED) == 0, "MDL locked\n");
213  ok((Mdl->MdlFlags & MDL_SOURCE_IS_NONPAGED_POOL) != 0, "MDL from paged\n");
214 
215  IoFreeMdl(Mdl);
216  ExFreePoolWithTag(Page, 'Test');
217 
218  Page = ExAllocatePoolWithTag(NonPagedPool, PAGE_SIZE, 'Test');
219  ok(Page != NULL, "ExAllocatePoolWithTag failed\n");
220  if (skip(Page != NULL, "No buffer\n"))
221  return;
222 
223  Mdl = IoAllocateMdl(Page, PAGE_SIZE, FALSE, FALSE, NULL);
224  ok(Mdl != NULL, "IoAllocateMdl failed\n");
225  if (skip(Mdl != NULL, "No MDL\n"))
226  return;
227 
228  ok((Mdl->MdlFlags & MDL_PAGES_LOCKED) == 0, "MDL locked\n");
229  ok((Mdl->MdlFlags & MDL_SOURCE_IS_NONPAGED_POOL) == 0, "MDL from non paged\n");
230 
231  MmBuildMdlForNonPagedPool(Mdl);
232  ok((Mdl->MdlFlags & MDL_PAGES_LOCKED) == 0, "MDL locked\n");
233  ok((Mdl->MdlFlags & MDL_SOURCE_IS_NONPAGED_POOL) != 0, "MDL from paged\n");
234 
235  IoFreeMdl(Mdl);
236  ExFreePoolWithTag(Page, 'Test');
237 }
238 
239 START_TEST(MmMdl)
240 {
241  TestMmAllocatePagesForMdl();
242  TestMmBuildMdlForNonPagedPool();
243 }
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