rostests/kmtests/ntos_mm/MmMdl.c

   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 START_TEST(MmMdl)
 192 {
 193     TestMmAllocatePagesForMdl();
 194 }