reactos/subsystems/win32/win32k/eng/device.c

   1 /*
   2  * COPYRIGHT:         See COPYING in the top level directory
   3  * PROJECT:           ReactOS kernel
   4  * PURPOSE:           GDI Driver Device Functions
   5  * FILE:              subsys/win32k/eng/device.c
   6  * PROGRAMER:         Jason Filby
   7  *                    Timo Kreuzer
   8  */
   9
  10 #include <win32k.h>
  11
  12 #define NDEBUG
  13 #include <debug.h>
  14
  15 PGRAPHICS_DEVICE gpPrimaryGraphicsDevice;
  16 PGRAPHICS_DEVICE gpVgaGraphicsDevice;
  17
  18 static PGRAPHICS_DEVICE gpGraphicsDeviceFirst = NULL;
  19 static PGRAPHICS_DEVICE gpGraphicsDeviceLast = NULL;
  20 static HSEMAPHORE ghsemGraphicsDeviceList;
  21 static ULONG giDevNum = 1;
  22
  23 INIT_FUNCTION
  24 NTSTATUS
  25 NTAPI
  26 InitDeviceImpl()
  27 {
  28     ghsemGraphicsDeviceList = EngCreateSemaphore();
  29     if (!ghsemGraphicsDeviceList)
  30         return STATUS_INSUFFICIENT_RESOURCES;
  31
  32     return STATUS_SUCCESS;
  33 }
  34
  35
  36 PGRAPHICS_DEVICE
  37 NTAPI
  38 EngpRegisterGraphicsDevice(
  39     PUNICODE_STRING pustrDeviceName,
  40     PUNICODE_STRING pustrDiplayDrivers,
  41     PUNICODE_STRING pustrDescription,
  42     PDEVMODEW pdmDefault)
  43 {
  44     PGRAPHICS_DEVICE pGraphicsDevice;
  45     PDEVICE_OBJECT pDeviceObject;
  46     PFILE_OBJECT pFileObject;
  47     NTSTATUS Status;
  48     PWSTR pwsz;
  49     ULONG i, cj, cModes = 0;
  50     BOOL bEnable = TRUE;
  51     PDEVMODEINFO pdminfo;
  52     PDEVMODEW pdm, pdmEnd;
  53     PLDEVOBJ pldev;
  54
  55     DPRINT("EngpRegisterGraphicsDevice(%wZ)\n", pustrDeviceName);
  56
  57     /* Allocate a GRAPHICS_DEVICE structure */
  58     pGraphicsDevice = ExAllocatePoolWithTag(PagedPool,
  59                                             sizeof(GRAPHICS_DEVICE),
  60                                             GDITAG_GDEVICE);
  61     if (!pGraphicsDevice)
  62     {
  63         DPRINT1("ExAllocatePoolWithTag failed\n");
  64         return NULL;
  65     }
  66
  67     /* Try to open the driver */
  68     Status = IoGetDeviceObjectPointer(pustrDeviceName,
  69                                       FILE_READ_DATA | FILE_WRITE_DATA,
  70                                       &pFileObject,
  71                                       &pDeviceObject);
  72     if (!NT_SUCCESS(Status))
  73     {
  74         DPRINT1("Could not open driver %wZ, 0x%lx\n", pustrDeviceName, Status);
  75         ExFreePoolWithTag(pGraphicsDevice, GDITAG_GDEVICE);
  76         return NULL;
  77     }
  78
  79     /* Enable the device */
  80     EngFileWrite(pFileObject, &bEnable, sizeof(BOOL), &cj);
  81
  82     /* Copy the device and file object pointers */
  83     pGraphicsDevice->DeviceObject = pDeviceObject;
  84     pGraphicsDevice->FileObject = pFileObject;
  85
  86     /* Copy device name */
  87     RtlStringCbCopyNW(pGraphicsDevice->szNtDeviceName,
  88                      sizeof(pGraphicsDevice->szNtDeviceName),
  89                      pustrDeviceName->Buffer,
  90                      pustrDeviceName->Length);
  91
  92     /* Create a win device name (FIXME: virtual devices!) */
  93     swprintf(pGraphicsDevice->szWinDeviceName, L"\\\\.\\DISPLAY%d", (int)giDevNum);
  94
  95     /* Allocate a buffer for the strings */
  96     cj = pustrDiplayDrivers->Length + pustrDescription->Length + sizeof(WCHAR);
  97     pwsz = ExAllocatePoolWithTag(PagedPool, cj, GDITAG_DRVSUP);
  98     if (!pwsz)
  99     {
 100         DPRINT1("Could not allocate string buffer\n");
 101         ASSERT(FALSE); // FIXME
 102         ExFreePoolWithTag(pGraphicsDevice, GDITAG_GDEVICE);
 103         return NULL;
 104     }
 105
 106     /* Copy display driver names */
 107     pGraphicsDevice->pDiplayDrivers = pwsz;
 108     RtlCopyMemory(pGraphicsDevice->pDiplayDrivers,
 109                   pustrDiplayDrivers->Buffer,
 110                   pustrDiplayDrivers->Length);
 111
 112     /* Copy description */
 113     pGraphicsDevice->pwszDescription = pwsz + pustrDiplayDrivers->Length / sizeof(WCHAR);
 114     RtlCopyMemory(pGraphicsDevice->pwszDescription,
 115                   pustrDescription->Buffer,
 116                   pustrDescription->Length + sizeof(WCHAR));
 117
 118     /* Initialize the pdevmodeInfo list and default index  */
 119     pGraphicsDevice->pdevmodeInfo = NULL;
 120     pGraphicsDevice->iDefaultMode = 0;
 121     pGraphicsDevice->iCurrentMode = 0;
 122
 123     // FIXME: initialize state flags
 124     pGraphicsDevice->StateFlags = 0;
 125
 126     /* Loop through the driver names
 127      * This is a REG_MULTI_SZ string */
 128     for (; *pwsz; pwsz += wcslen(pwsz) + 1)
 129     {
 130         DPRINT("trying driver: %ls\n", pwsz);
 131         /* Try to load the display driver */
 132         pldev = EngLoadImageEx(pwsz, LDEV_DEVICE_DISPLAY);
 133         if (!pldev)
 134         {
 135             DPRINT1("Could not load driver: '%ls'\n", pwsz);
 136             continue;
 137         }
 138
 139         /* Get the mode list from the driver */
 140         pdminfo = LDEVOBJ_pdmiGetModes(pldev, pDeviceObject);
 141         if (!pdminfo)
 142         {
 143             DPRINT1("Could not get mode list for '%ls'\n", pwsz);
 144             continue;
 145         }
 146
 147         /* Attach the mode info to the device */
 148         pdminfo->pdmiNext = pGraphicsDevice->pdevmodeInfo;
 149         pGraphicsDevice->pdevmodeInfo = pdminfo;
 150
 151         /* Count DEVMODEs */
 152         pdmEnd = (DEVMODEW*)((PCHAR)pdminfo->adevmode + pdminfo->cbdevmode);
 153         for (pdm = pdminfo->adevmode;
 154              pdm + 1 <= pdmEnd;
 155              pdm = (DEVMODEW*)((PCHAR)pdm + pdm->dmSize + pdm->dmDriverExtra))
 156         {
 157             cModes++;
 158         }
 159
 160         // FIXME: release the driver again until it's used?
 161     }
 162
 163     if (!pGraphicsDevice->pdevmodeInfo || cModes == 0)
 164     {
 165         DPRINT1("No devmodes\n");
 166         ExFreePoolWithTag(pGraphicsDevice, GDITAG_GDEVICE);
 167         return NULL;
 168     }
 169
 170     /* Allocate an index buffer */
 171     pGraphicsDevice->cDevModes = cModes;
 172     pGraphicsDevice->pDevModeList = ExAllocatePoolWithTag(PagedPool,
 173                                                           cModes * sizeof(DEVMODEENTRY),
 174                                                           GDITAG_GDEVICE);
 175     if (!pGraphicsDevice->pDevModeList)
 176     {
 177         DPRINT1("No devmode list\n");
 178         ExFreePoolWithTag(pGraphicsDevice, GDITAG_GDEVICE);
 179         return NULL;
 180     }
 181
 182     /* Loop through all DEVMODEINFOs */
 183     for (pdminfo = pGraphicsDevice->pdevmodeInfo, i = 0;
 184          pdminfo;
 185          pdminfo = pdminfo->pdmiNext)
 186     {
 187         /* Calculate End of the DEVMODEs */
 188         pdmEnd = (DEVMODEW*)((PCHAR)pdminfo->adevmode + pdminfo->cbdevmode);
 189
 190         /* Loop through the DEVMODEs */
 191         for (pdm = pdminfo->adevmode;
 192              pdm + 1 <= pdmEnd;
 193              pdm = (PDEVMODEW)((PCHAR)pdm + pdm->dmSize + pdm->dmDriverExtra))
 194         {
 195             /* Compare with the default entry */
 196             if (pdm->dmBitsPerPel == pdmDefault->dmBitsPerPel &&
 197                 pdm->dmPelsWidth == pdmDefault->dmPelsWidth &&
 198                 pdm->dmPelsHeight == pdmDefault->dmPelsHeight &&
 199                 pdm->dmDisplayFrequency == pdmDefault->dmDisplayFrequency)
 200             {
 201                 pGraphicsDevice->iDefaultMode = i;
 202                 pGraphicsDevice->iCurrentMode = i;
 203                 DPRINT("Found default entry: %ld '%ls'\n", i, pdm->dmDeviceName);
 204             }
 205
 206             /* Initialize the entry */
 207             pGraphicsDevice->pDevModeList[i].dwFlags = 0;
 208             pGraphicsDevice->pDevModeList[i].pdm = pdm;
 209             i++;
 210         }
 211      }
 212
 213     /* Lock loader */
 214     EngAcquireSemaphore(ghsemGraphicsDeviceList);
 215
 216     /* Insert the device into the global list */
 217     pGraphicsDevice->pNextGraphicsDevice = gpGraphicsDeviceLast;
 218     gpGraphicsDeviceLast = pGraphicsDevice;
 219     if (!gpGraphicsDeviceFirst)
 220         gpGraphicsDeviceFirst = pGraphicsDevice;
 221
 222     /* Increment device number */
 223     giDevNum++;
 224
 225     /* Unlock loader */
 226     EngReleaseSemaphore(ghsemGraphicsDeviceList);
 227     DPRINT("Prepared %ld modes for %ls\n", cModes, pGraphicsDevice->pwszDescription);
 228
 229     return pGraphicsDevice;
 230 }
 231
 232
 233 PGRAPHICS_DEVICE
 234 NTAPI
 235 EngpFindGraphicsDevice(
 236     PUNICODE_STRING pustrDevice,
 237     ULONG iDevNum,
 238     DWORD dwFlags)
 239 {
 240     UNICODE_STRING ustrCurrent;
 241     PGRAPHICS_DEVICE pGraphicsDevice;
 242     ULONG i;
 243
 244     /* Lock list */
 245     EngAcquireSemaphore(ghsemGraphicsDeviceList);
 246
 247     if (pustrDevice)
 248     {
 249         /* Loop through the list of devices */
 250         for (pGraphicsDevice = gpGraphicsDeviceFirst;
 251              pGraphicsDevice;
 252              pGraphicsDevice = pGraphicsDevice->pNextGraphicsDevice)
 253         {
 254             /* Compare the device name */
 255             RtlInitUnicodeString(&ustrCurrent, pGraphicsDevice->szWinDeviceName);
 256             if (RtlEqualUnicodeString(&ustrCurrent, pustrDevice, FALSE))
 257             {
 258                 break;
 259             }
 260         }
 261     }
 262     else
 263     {
 264         /* Loop through the list of devices */
 265         for (pGraphicsDevice = gpGraphicsDeviceFirst, i = 0;
 266              pGraphicsDevice && i < iDevNum;
 267              pGraphicsDevice = pGraphicsDevice->pNextGraphicsDevice, i++);
 268     }
 269
 270     /* Unlock list */
 271     EngReleaseSemaphore(ghsemGraphicsDeviceList);
 272
 273     return pGraphicsDevice;
 274 }
 275
 276
 277 static
 278 NTSTATUS
 279 EngpFileIoRequest(
 280     PFILE_OBJECT pFileObject,
 281     ULONG   ulMajorFunction,
 282     LPVOID  lpBuffer,
 283     DWORD   nBufferSize,
 284     ULONGLONG  ullStartOffset,
 285     OUT LPDWORD lpInformation)
 286 {
 287     PDEVICE_OBJECT pDeviceObject;
 288     KEVENT Event;
 289     PIRP pIrp;
 290     IO_STATUS_BLOCK Iosb;
 291     NTSTATUS Status;
 292     LARGE_INTEGER liStartOffset;
 293
 294     /* Get corresponding device object */
 295     pDeviceObject = IoGetRelatedDeviceObject(pFileObject);
 296     if (!pDeviceObject)
 297     {
 298         return STATUS_INVALID_PARAMETER;
 299     }
 300
 301     /* Initialize an event */
 302     KeInitializeEvent(&Event, SynchronizationEvent, FALSE);
 303
 304     /* Build IRP */
 305     liStartOffset.QuadPart = ullStartOffset;
 306     pIrp = IoBuildSynchronousFsdRequest(ulMajorFunction,
 307                                         pDeviceObject,
 308                                         lpBuffer,
 309                                         nBufferSize,
 310                                         &liStartOffset,
 311                                         &Event,
 312                                         &Iosb);
 313     if (!pIrp)
 314     {
 315         return STATUS_INSUFFICIENT_RESOURCES;
 316     }
 317
 318     /* Call the driver */
 319     Status = IoCallDriver(pDeviceObject, pIrp);
 320
 321     /* Wait if neccessary */
 322     if (STATUS_PENDING == Status)
 323     {
 324         KeWaitForSingleObject(&Event, Executive, KernelMode, TRUE, 0);
 325         Status = Iosb.Status;
 326     }
 327
 328     /* Return information to the caller about the operation. */
 329     *lpInformation = Iosb.Information;
 330
 331     /* Return NTSTATUS */
 332     return Status;
 333 }
 334
 335 VOID
 336 APIENTRY
 337 EngFileWrite(
 338     IN PFILE_OBJECT pFileObject,
 339     IN PVOID lpBuffer,
 340     IN SIZE_T nLength,
 341     IN PSIZE_T lpBytesWritten)
 342 {
 343     EngpFileIoRequest(pFileObject,
 344                       IRP_MJ_WRITE,
 345                       lpBuffer,
 346                       nLength,
 347                       0,
 348                       lpBytesWritten);
 349 }
 350
 351 NTSTATUS
 352 APIENTRY
 353 EngFileIoControl(
 354     IN PFILE_OBJECT pFileObject,
 355     IN DWORD dwIoControlCode,
 356     IN PVOID lpInBuffer,
 357     IN SIZE_T nInBufferSize,
 358     OUT PVOID lpOutBuffer,
 359     IN SIZE_T nOutBufferSize,
 360     OUT LPDWORD lpInformation)
 361 {
 362     PDEVICE_OBJECT pDeviceObject;
 363     KEVENT Event;
 364     PIRP pIrp;
 365     IO_STATUS_BLOCK Iosb;
 366     NTSTATUS Status;
 367
 368     /* Get corresponding device object */
 369     pDeviceObject = IoGetRelatedDeviceObject(pFileObject);
 370     if (!pDeviceObject)
 371     {
 372         return STATUS_INVALID_PARAMETER;
 373     }
 374
 375     /* Initialize an event */
 376     KeInitializeEvent(&Event, SynchronizationEvent, FALSE);
 377
 378     /* Build IO control IRP */
 379     pIrp = IoBuildDeviceIoControlRequest(dwIoControlCode,
 380                                          pDeviceObject,
 381                                          lpInBuffer,
 382                                          nInBufferSize,
 383                                          lpOutBuffer,
 384                                          nOutBufferSize,
 385                                          FALSE,
 386                                          &Event,
 387                                          &Iosb);
 388     if (!pIrp)
 389     {
 390         return STATUS_INSUFFICIENT_RESOURCES;
 391     }
 392
 393     /* Call the driver */
 394     Status = IoCallDriver(pDeviceObject, pIrp);
 395
 396     /* Wait if neccessary */
 397     if (Status == STATUS_PENDING)
 398     {
 399         KeWaitForSingleObject(&Event, Executive, KernelMode, TRUE, 0);
 400         Status = Iosb.Status;
 401     }
 402
 403     /* Return information to the caller about the operation. */
 404     *lpInformation = Iosb.Information;
 405
 406     /* This function returns NTSTATUS */
 407     return Status;
 408 }
 409
 410 /*
 411  * @implemented
 412  */
 413 DWORD APIENTRY
 414 EngDeviceIoControl(
 415     HANDLE  hDevice,
 416     DWORD   dwIoControlCode,
 417     LPVOID  lpInBuffer,
 418     DWORD   nInBufferSize,
 419     LPVOID  lpOutBuffer,
 420     DWORD   nOutBufferSize,
 421     DWORD *lpBytesReturned)
 422 {
 423     PIRP Irp;
 424     NTSTATUS Status;
 425     KEVENT Event;
 426     IO_STATUS_BLOCK Iosb;
 427     PDEVICE_OBJECT DeviceObject;
 428
 429     DPRINT("EngDeviceIoControl() called\n");
 430
 431     KeInitializeEvent(&Event, SynchronizationEvent, FALSE);
 432
 433     DeviceObject = (PDEVICE_OBJECT) hDevice;
 434
 435     Irp = IoBuildDeviceIoControlRequest(dwIoControlCode,
 436                                         DeviceObject,
 437                                         lpInBuffer,
 438                                         nInBufferSize,
 439                                         lpOutBuffer,
 440                                         nOutBufferSize, FALSE, &Event, &Iosb);
 441     if (!Irp) return ERROR_NOT_ENOUGH_MEMORY;
 442
 443     Status = IoCallDriver(DeviceObject, Irp);
 444
 445     if (Status == STATUS_PENDING)
 446     {
 447         (VOID)KeWaitForSingleObject(&Event, Executive, KernelMode, TRUE, 0);
 448         Status = Iosb.Status;
 449     }
 450
 451     DPRINT("EngDeviceIoControl(): Returning %X/%X\n", Iosb.Status,
 452            Iosb.Information);
 453
 454     /* Return information to the caller about the operation. */
 455     *lpBytesReturned = Iosb.Information;
 456
 457     /* Convert NT status values to win32 error codes. */
 458     switch (Status)
 459     {
 460         case STATUS_INSUFFICIENT_RESOURCES:
 461             return ERROR_NOT_ENOUGH_MEMORY;
 462
 463         case STATUS_BUFFER_OVERFLOW:
 464             return ERROR_MORE_DATA;
 465
 466         case STATUS_NOT_IMPLEMENTED:
 467             return ERROR_INVALID_FUNCTION;
 468
 469         case STATUS_INVALID_PARAMETER:
 470             return ERROR_INVALID_PARAMETER;
 471
 472         case STATUS_BUFFER_TOO_SMALL:
 473             return ERROR_INSUFFICIENT_BUFFER;
 474
 475         case STATUS_DEVICE_DOES_NOT_EXIST:
 476             return ERROR_DEV_NOT_EXIST;
 477
 478         case STATUS_PENDING:
 479             return ERROR_IO_PENDING;
 480     }
 481
 482     return Status;
 483 }
 484
 485 /* EOF */