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         /* Loop all DEVMODEs */
 152         pdmEnd = (DEVMODEW*)((PCHAR)pdminfo->adevmode + pdminfo->cbdevmode);
 153         for (pdm = pdminfo->adevmode;
 154              (pdm + 1 <= pdmEnd) && (pdm->dmSize != 0);
 155              pdm = (DEVMODEW*)((PCHAR)pdm + pdm->dmSize + pdm->dmDriverExtra))
 156         {
 157             /* Count this DEVMODE */
 158             cModes++;
 159
 160             /* Some drivers like the VBox driver don't fill the dmDeviceName
 161                with the name of the display driver. So fix that here. */
 162             wcsncpy(pdm->dmDeviceName, pwsz, CCHDEVICENAME);
 163             pdm->dmDeviceName[CCHDEVICENAME - 1] = 0;
 164         }
 165
 166         // FIXME: release the driver again until it's used?
 167     }
 168
 169     if (!pGraphicsDevice->pdevmodeInfo || cModes == 0)
 170     {
 171         DPRINT1("No devmodes\n");
 172         ExFreePoolWithTag(pGraphicsDevice, GDITAG_GDEVICE);
 173         return NULL;
 174     }
 175
 176     /* Allocate an index buffer */
 177     pGraphicsDevice->cDevModes = cModes;
 178     pGraphicsDevice->pDevModeList = ExAllocatePoolWithTag(PagedPool,
 179                                                           cModes * sizeof(DEVMODEENTRY),
 180                                                           GDITAG_GDEVICE);
 181     if (!pGraphicsDevice->pDevModeList)
 182     {
 183         DPRINT1("No devmode list\n");
 184         ExFreePoolWithTag(pGraphicsDevice, GDITAG_GDEVICE);
 185         return NULL;
 186     }
 187
 188     /* Loop through all DEVMODEINFOs */
 189     for (pdminfo = pGraphicsDevice->pdevmodeInfo, i = 0;
 190          pdminfo;
 191          pdminfo = pdminfo->pdmiNext)
 192     {
 193         /* Calculate End of the DEVMODEs */
 194         pdmEnd = (DEVMODEW*)((PCHAR)pdminfo->adevmode + pdminfo->cbdevmode);
 195
 196         /* Loop through the DEVMODEs */
 197         for (pdm = pdminfo->adevmode;
 198              (pdm + 1 <= pdmEnd) && (pdm->dmSize != 0);
 199              pdm = (PDEVMODEW)((PCHAR)pdm + pdm->dmSize + pdm->dmDriverExtra))
 200         {
 201             /* Compare with the default entry */
 202             if (pdm->dmBitsPerPel == pdmDefault->dmBitsPerPel &&
 203                 pdm->dmPelsWidth == pdmDefault->dmPelsWidth &&
 204                 pdm->dmPelsHeight == pdmDefault->dmPelsHeight &&
 205                 pdm->dmDisplayFrequency == pdmDefault->dmDisplayFrequency)
 206             {
 207                 pGraphicsDevice->iDefaultMode = i;
 208                 pGraphicsDevice->iCurrentMode = i;
 209                 DPRINT("Found default entry: %ld '%ls'\n", i, pdm->dmDeviceName);
 210             }
 211
 212             /* Initialize the entry */
 213             pGraphicsDevice->pDevModeList[i].dwFlags = 0;
 214             pGraphicsDevice->pDevModeList[i].pdm = pdm;
 215             i++;
 216         }
 217      }
 218
 219     /* Lock loader */
 220     EngAcquireSemaphore(ghsemGraphicsDeviceList);
 221
 222     /* Insert the device into the global list */
 223     pGraphicsDevice->pNextGraphicsDevice = gpGraphicsDeviceLast;
 224     gpGraphicsDeviceLast = pGraphicsDevice;
 225     if (!gpGraphicsDeviceFirst)
 226         gpGraphicsDeviceFirst = pGraphicsDevice;
 227
 228     /* Increment device number */
 229     giDevNum++;
 230
 231     /* Unlock loader */
 232     EngReleaseSemaphore(ghsemGraphicsDeviceList);
 233     DPRINT("Prepared %ld modes for %ls\n", cModes, pGraphicsDevice->pwszDescription);
 234
 235     return pGraphicsDevice;
 236 }
 237
 238
 239 PGRAPHICS_DEVICE
 240 NTAPI
 241 EngpFindGraphicsDevice(
 242     PUNICODE_STRING pustrDevice,
 243     ULONG iDevNum,
 244     DWORD dwFlags)
 245 {
 246     UNICODE_STRING ustrCurrent;
 247     PGRAPHICS_DEVICE pGraphicsDevice;
 248     ULONG i;
 249
 250     /* Lock list */
 251     EngAcquireSemaphore(ghsemGraphicsDeviceList);
 252
 253     if (pustrDevice)
 254     {
 255         /* Loop through the list of devices */
 256         for (pGraphicsDevice = gpGraphicsDeviceFirst;
 257              pGraphicsDevice;
 258              pGraphicsDevice = pGraphicsDevice->pNextGraphicsDevice)
 259         {
 260             /* Compare the device name */
 261             RtlInitUnicodeString(&ustrCurrent, pGraphicsDevice->szWinDeviceName);
 262             if (RtlEqualUnicodeString(&ustrCurrent, pustrDevice, FALSE))
 263             {
 264                 break;
 265             }
 266         }
 267     }
 268     else
 269     {
 270         /* Loop through the list of devices */
 271         for (pGraphicsDevice = gpGraphicsDeviceFirst, i = 0;
 272              pGraphicsDevice && i < iDevNum;
 273              pGraphicsDevice = pGraphicsDevice->pNextGraphicsDevice, i++);
 274     }
 275
 276     /* Unlock list */
 277     EngReleaseSemaphore(ghsemGraphicsDeviceList);
 278
 279     return pGraphicsDevice;
 280 }
 281
 282
 283 static
 284 NTSTATUS
 285 EngpFileIoRequest(
 286     PFILE_OBJECT pFileObject,
 287     ULONG   ulMajorFunction,
 288     LPVOID  lpBuffer,
 289     DWORD   nBufferSize,
 290     ULONGLONG  ullStartOffset,
 291     OUT LPDWORD lpInformation)
 292 {
 293     PDEVICE_OBJECT pDeviceObject;
 294     KEVENT Event;
 295     PIRP pIrp;
 296     IO_STATUS_BLOCK Iosb;
 297     NTSTATUS Status;
 298     LARGE_INTEGER liStartOffset;
 299
 300     /* Get corresponding device object */
 301     pDeviceObject = IoGetRelatedDeviceObject(pFileObject);
 302     if (!pDeviceObject)
 303     {
 304         return STATUS_INVALID_PARAMETER;
 305     }
 306
 307     /* Initialize an event */
 308     KeInitializeEvent(&Event, SynchronizationEvent, FALSE);
 309
 310     /* Build IRP */
 311     liStartOffset.QuadPart = ullStartOffset;
 312     pIrp = IoBuildSynchronousFsdRequest(ulMajorFunction,
 313                                         pDeviceObject,
 314                                         lpBuffer,
 315                                         nBufferSize,
 316                                         &liStartOffset,
 317                                         &Event,
 318                                         &Iosb);
 319     if (!pIrp)
 320     {
 321         return STATUS_INSUFFICIENT_RESOURCES;
 322     }
 323
 324     /* Call the driver */
 325     Status = IoCallDriver(pDeviceObject, pIrp);
 326
 327     /* Wait if neccessary */
 328     if (STATUS_PENDING == Status)
 329     {
 330         KeWaitForSingleObject(&Event, Executive, KernelMode, TRUE, 0);
 331         Status = Iosb.Status;
 332     }
 333
 334     /* Return information to the caller about the operation. */
 335     *lpInformation = Iosb.Information;
 336
 337     /* Return NTSTATUS */
 338     return Status;
 339 }
 340
 341 VOID
 342 APIENTRY
 343 EngFileWrite(
 344     IN PFILE_OBJECT pFileObject,
 345     IN PVOID lpBuffer,
 346     IN SIZE_T nLength,
 347     IN PSIZE_T lpBytesWritten)
 348 {
 349     EngpFileIoRequest(pFileObject,
 350                       IRP_MJ_WRITE,
 351                       lpBuffer,
 352                       nLength,
 353                       0,
 354                       lpBytesWritten);
 355 }
 356
 357 NTSTATUS
 358 APIENTRY
 359 EngFileIoControl(
 360     IN PFILE_OBJECT pFileObject,
 361     IN DWORD dwIoControlCode,
 362     IN PVOID lpInBuffer,
 363     IN SIZE_T nInBufferSize,
 364     OUT PVOID lpOutBuffer,
 365     IN SIZE_T nOutBufferSize,
 366     OUT LPDWORD lpInformation)
 367 {
 368     PDEVICE_OBJECT pDeviceObject;
 369     KEVENT Event;
 370     PIRP pIrp;
 371     IO_STATUS_BLOCK Iosb;
 372     NTSTATUS Status;
 373
 374     /* Get corresponding device object */
 375     pDeviceObject = IoGetRelatedDeviceObject(pFileObject);
 376     if (!pDeviceObject)
 377     {
 378         return STATUS_INVALID_PARAMETER;
 379     }
 380
 381     /* Initialize an event */
 382     KeInitializeEvent(&Event, SynchronizationEvent, FALSE);
 383
 384     /* Build IO control IRP */
 385     pIrp = IoBuildDeviceIoControlRequest(dwIoControlCode,
 386                                          pDeviceObject,
 387                                          lpInBuffer,
 388                                          nInBufferSize,
 389                                          lpOutBuffer,
 390                                          nOutBufferSize,
 391                                          FALSE,
 392                                          &Event,
 393                                          &Iosb);
 394     if (!pIrp)
 395     {
 396         return STATUS_INSUFFICIENT_RESOURCES;
 397     }
 398
 399     /* Call the driver */
 400     Status = IoCallDriver(pDeviceObject, pIrp);
 401
 402     /* Wait if neccessary */
 403     if (Status == STATUS_PENDING)
 404     {
 405         KeWaitForSingleObject(&Event, Executive, KernelMode, TRUE, 0);
 406         Status = Iosb.Status;
 407     }
 408
 409     /* Return information to the caller about the operation. */
 410     *lpInformation = Iosb.Information;
 411
 412     /* This function returns NTSTATUS */
 413     return Status;
 414 }
 415
 416 /*
 417  * @implemented
 418  */
 419 DWORD APIENTRY
 420 EngDeviceIoControl(
 421     HANDLE  hDevice,
 422     DWORD   dwIoControlCode,
 423     LPVOID  lpInBuffer,
 424     DWORD   nInBufferSize,
 425     LPVOID  lpOutBuffer,
 426     DWORD   nOutBufferSize,
 427     DWORD *lpBytesReturned)
 428 {
 429     PIRP Irp;
 430     NTSTATUS Status;
 431     KEVENT Event;
 432     IO_STATUS_BLOCK Iosb;
 433     PDEVICE_OBJECT DeviceObject;
 434
 435     DPRINT("EngDeviceIoControl() called\n");
 436
 437     KeInitializeEvent(&Event, SynchronizationEvent, FALSE);
 438
 439     DeviceObject = (PDEVICE_OBJECT) hDevice;
 440
 441     Irp = IoBuildDeviceIoControlRequest(dwIoControlCode,
 442                                         DeviceObject,
 443                                         lpInBuffer,
 444                                         nInBufferSize,
 445                                         lpOutBuffer,
 446                                         nOutBufferSize, FALSE, &Event, &Iosb);
 447     if (!Irp) return ERROR_NOT_ENOUGH_MEMORY;
 448
 449     Status = IoCallDriver(DeviceObject, Irp);
 450
 451     if (Status == STATUS_PENDING)
 452     {
 453         (VOID)KeWaitForSingleObject(&Event, Executive, KernelMode, TRUE, 0);
 454         Status = Iosb.Status;
 455     }
 456
 457     DPRINT("EngDeviceIoControl(): Returning %X/%X\n", Iosb.Status,
 458            Iosb.Information);
 459
 460     /* Return information to the caller about the operation. */
 461     *lpBytesReturned = Iosb.Information;
 462
 463     /* Convert NT status values to win32 error codes. */
 464     switch (Status)
 465     {
 466         case STATUS_INSUFFICIENT_RESOURCES:
 467             return ERROR_NOT_ENOUGH_MEMORY;
 468
 469         case STATUS_BUFFER_OVERFLOW:
 470             return ERROR_MORE_DATA;
 471
 472         case STATUS_NOT_IMPLEMENTED:
 473             return ERROR_INVALID_FUNCTION;
 474
 475         case STATUS_INVALID_PARAMETER:
 476             return ERROR_INVALID_PARAMETER;
 477
 478         case STATUS_BUFFER_TOO_SMALL:
 479             return ERROR_INSUFFICIENT_BUFFER;
 480
 481         case STATUS_DEVICE_DOES_NOT_EXIST:
 482             return ERROR_DEV_NOT_EXIST;
 483
 484         case STATUS_PENDING:
 485             return ERROR_IO_PENDING;
 486     }
 487
 488     return Status;
 489 }
 490
 491 /* EOF */