mga_dri.c

Mesa is an open-source implementation of the OpenGL specification - a system for rendering interacti

   fprintf(stderr, 
	   "Will use back buffer at offset 0x%x\n",
	   pMga->backOffset);
   fprintf(stderr, 
	   "Will use depth buffer at offset 0x%x\n",
	   pMga->depthOffset);
   fprintf(stderr, 
	   "Will use %d kb for textures at offset 0x%x\n",
	   pMga->textureSize/1024, pMga->textureOffset);

   return 1;
} 

static int MGACheckDRMVersion( struct DRIDriverContextRec *ctx, MGAPtr pMga )
{
  drmVersionPtr version;

  /* Check the MGA DRM version */
  version = drmGetVersion(ctx->drmFD);
  if ( version ) {
    if ( version->version_major != 3 ||
         version->version_minor < 0 ) {
            /* incompatible drm version */
      fprintf( stderr,
               "[dri] MGADRIScreenInit failed because of a version mismatch.\n"
               "[dri] mga.o kernel module version is %d.%d.%d but version 3.0.x is needed.\n"
               "[dri] Disabling DRI.\n",
               version->version_major,
               version->version_minor,
               version->version_patchlevel );
      drmFreeVersion( version );
      return 0;
    }
    drmFreeVersion( version );
  }

  return 1;
}

static void print_client_msg( MGADRIPtr pMGADRI )
{
  fprintf( stderr, "chipset:                  %d\n", pMGADRI->chipset );

  fprintf( stderr, "width:                    %d\n", pMGADRI->width );
  fprintf( stderr, "height:                   %d\n", pMGADRI->height );
  fprintf( stderr, "mem:                      %d\n", pMGADRI->mem );
  fprintf( stderr, "cpp:                      %d\n", pMGADRI->cpp );

  fprintf( stderr, "agpMode:                  %d\n", pMGADRI->agpMode );

  fprintf( stderr, "frontOffset:              %d\n", pMGADRI->frontOffset );
  fprintf( stderr, "frontPitch:               %d\n", pMGADRI->frontPitch );

  fprintf( stderr, "backOffset:               %d\n", pMGADRI->backOffset );
  fprintf( stderr, "backPitch:                %d\n", pMGADRI->backPitch );

  fprintf( stderr, "depthOffset:              %d\n", pMGADRI->depthOffset );
  fprintf( stderr, "depthPitch:               %d\n", pMGADRI->depthPitch );

  fprintf( stderr, "textureOffset:            %d\n", pMGADRI->textureOffset );
  fprintf( stderr, "textureSize:              %d\n", pMGADRI->textureSize );

  fprintf( stderr, "logTextureGranularity:    %d\n", pMGADRI->logTextureGranularity );
  fprintf( stderr, "logAgpTextureGranularity: %d\n", pMGADRI->logAgpTextureGranularity );

  fprintf( stderr, "agpTextureHandle:         %u\n", (unsigned int)pMGADRI->agpTextureOffset );
  fprintf( stderr, "agpTextureSize:           %u\n", (unsigned int)pMGADRI->agpTextureSize );

#if 0
   pMGADRI->registers.handle	= pMga->registers.handle;
   pMGADRI->registers.size	= pMga->registers.size;
   pMGADRI->status.handle	= pMga->status.handle;
   pMGADRI->status.size		= pMga->status.size;
   pMGADRI->primary.handle	= pMga->primary.handle;
   pMGADRI->primary.size	= pMga->primary.size;
   pMGADRI->buffers.handle	= pMga->buffers.handle;
   pMGADRI->buffers.size	= pMga->buffers.size;
   pMGADRI->sarea_priv_offset = sizeof(drm_sarea_t);
#endif
}

static int MGAScreenInit( struct DRIDriverContextRec *ctx, MGAPtr pMga )
{
  int       i;
  int       err;
  MGADRIPtr pMGADRI;

  usleep(100);
  /*assert(!ctx->IsClient);*/

   {
      int  width_bytes = (ctx->shared.virtualWidth * ctx->cpp);
      int  maxy        = ctx->shared.fbSize / width_bytes;


      if (maxy <= ctx->shared.virtualHeight * 3) {
	 fprintf(stderr, 
		 "Static buffer allocation failed -- "
		 "need at least %d kB video memory (have %d kB)\n",
		 (ctx->shared.virtualWidth * ctx->shared.virtualHeight *
		  ctx->cpp * 3 + 1023) / 1024,
		 ctx->shared.fbSize / 1024);
	 return 0;
      } 
   }

   switch(pMga->Chipset) {
   case PCI_CHIP_MGAG550:
   case PCI_CHIP_MGAG400:
   case PCI_CHIP_MGAG200:
#if 0
   case PCI_CHIP_MGAG200_PCI:
#endif
      break;
   default:
      fprintf(stderr, "[drm] Direct rendering only supported with G200/G400/G550 AGP\n");
      return 0;
   }

   fprintf( stderr,
	       "[drm] bpp: %d depth: %d\n",
            ctx->bpp, ctx->bpp /* FIXME: depth */ );

   if ( (ctx->bpp / 8) != 2 &&
	(ctx->bpp / 8) != 4 ) {
      fprintf( stderr,
		  "[dri] Direct rendering only supported in 16 and 32 bpp modes\n" );
      return 0;
   }

   ctx->shared.SAREASize = SAREA_MAX;


   /* Note that drmOpen will try to load the kernel module, if needed. */
   ctx->drmFD = drmOpen("mga", NULL );
   if (ctx->drmFD < 0) {
      fprintf(stderr, "[drm] drmOpen failed\n");
      return 0;
   }

   if ((err = drmSetBusid(ctx->drmFD, ctx->pciBusID)) < 0) {
      fprintf(stderr, "[drm] drmSetBusid failed (%d, %s), %s\n",
	      ctx->drmFD, ctx->pciBusID, strerror(-err));
      return 0;
   }

     
   if (drmAddMap( ctx->drmFD,
		  0,
		  ctx->shared.SAREASize,
		  DRM_SHM,
		  DRM_CONTAINS_LOCK,
		  &ctx->shared.hSAREA) < 0)
   {
      fprintf(stderr, "[drm] drmAddMap failed\n");
      return 0;
   }
   fprintf(stderr, "[drm] added %d byte SAREA at 0x%08lx\n",
	   ctx->shared.SAREASize, ctx->shared.hSAREA);

   if (drmMap( ctx->drmFD,
	       ctx->shared.hSAREA,
	       ctx->shared.SAREASize,
	       (drmAddressPtr)(&ctx->pSAREA)) < 0)
   {
      fprintf(stderr, "[drm] drmMap failed\n");
      return 0;
   }
   memset(ctx->pSAREA, 0, ctx->shared.SAREASize);
   fprintf(stderr, "[drm] mapped SAREA 0x%08lx to %p, size %d\n",
	   ctx->shared.hSAREA, ctx->pSAREA, ctx->shared.SAREASize);
   
   /* Need to AddMap the framebuffer and mmio regions here:
    */
   if (drmAddMap( ctx->drmFD,
		  (drm_handle_t)ctx->FBStart,
		  ctx->FBSize,
		  DRM_FRAME_BUFFER,
		  0,
		  &ctx->shared.hFrameBuffer) < 0)
   {
      fprintf(stderr, "[drm] drmAddMap framebuffer failed\n");
      return 0;
   }
   fprintf(stderr, "[drm] framebuffer handle = 0x%08lx\n",
	   ctx->shared.hFrameBuffer);


#if 0 /* will be done in MGADRIMapInit */
   if (drmAddMap(ctx->drmFD, 
		 ctx->FixedInfo.mmio_start,
		 ctx->FixedInfo.mmio_len,
		 DRM_REGISTERS, 
		 DRM_READ_ONLY, 
		 &pMga->registers.handle) < 0) {
      fprintf(stderr, "[drm] drmAddMap mmio failed\n");	
      return 0;
   }
   fprintf(stderr,
	   "[drm] register handle = 0x%08lx\n", pMga->registers.handle);
#endif


   /* Check the mga DRM version */
   if (!MGACheckDRMVersion(ctx, pMga)) {
      return 0;
   }

   if ( !MGADRIAgpInit( ctx, pMga ) ) {
      return 0;
   }

   if ( !MGADRIMapInit( ctx, pMga ) ) {
      return 0;
   }

   /* Memory manager setup */
   if (!MGAMemoryInit(ctx, pMga)) {
      return 0;
   }


   /* Create a 'server' context so we can grab the lock for
    * initialization ioctls.
    */
   if ((err = drmCreateContext(ctx->drmFD, &ctx->serverContext)) != 0) {
      fprintf(stderr, "%s: drmCreateContext failed %d\n", __FUNCTION__, err);
      return 0;
   }

   DRM_LOCK(ctx->drmFD, ctx->pSAREA, ctx->serverContext, 0); 

   /* Initialize the kernel data structures */
   if (!MGADRIKernelInit(ctx, pMga)) {
      fprintf(stderr, "MGADRIKernelInit failed\n");
      DRM_UNLOCK(ctx->drmFD, ctx->pSAREA, ctx->serverContext);
      return 0;
   }

   /* Initialize the vertex buffers list */
   if (!MGADRIBuffersInit(ctx, pMga)) {
      fprintf(stderr, "MGADRIBuffersInit failed\n");
      DRM_UNLOCK(ctx->drmFD, ctx->pSAREA, ctx->serverContext);
      return 0;
   }

   /* Initialize IRQ */
   MGADRIIrqInit(ctx, pMga);


   /* Initialize the SAREA private data structure */
   {
      drm_mga_sarea_t *pSAREAPriv;
      pSAREAPriv = (drm_mga_sarea_t *)(((char*)ctx->pSAREA) + 
					sizeof(drm_sarea_t));
      memset(pSAREAPriv, 0, sizeof(*pSAREAPriv));
   }

   /* Quick hack to clear the front & back buffers.  Could also use
    * the clear ioctl to do this, but would need to setup hw state
    * first.
    */
   drimemsetio((char *)ctx->FBAddress + pMga->frontOffset,
	  0,
	  pMga->frontPitch * ctx->shared.virtualHeight );

   drimemsetio((char *)ctx->FBAddress + pMga->backOffset,
	  0,
	  pMga->backPitch * ctx->shared.virtualHeight );

   /* Can release the lock now */
/*   DRM_UNLOCK(ctx->drmFD, ctx->pSAREA, ctx->serverContext);*/

   /* This is the struct passed to radeon_dri.so for its initialization */
   ctx->driverClientMsg = malloc(sizeof(MGADRIRec));
   ctx->driverClientMsgSize = sizeof(MGADRIRec);

   pMGADRI                    = (MGADRIPtr)ctx->driverClientMsg;


   switch(pMga->Chipset) {
   case PCI_CHIP_MGAG550:
   case PCI_CHIP_MGAG400:
      pMGADRI->chipset = MGA_CARD_TYPE_G400;
      break;
   case PCI_CHIP_MGAG200:
   case PCI_CHIP_MGAG200_PCI:
      pMGADRI->chipset = MGA_CARD_TYPE_G200;
      break;
   default:
      return 0;
   }
   pMGADRI->width		= ctx->shared.virtualWidth;
   pMGADRI->height		= ctx->shared.virtualHeight;
   pMGADRI->mem			= ctx->shared.fbSize;
   pMGADRI->cpp			= ctx->bpp / 8;

   pMGADRI->agpMode		= pMga->agpMode;

   pMGADRI->frontOffset		= pMga->frontOffset;
   pMGADRI->frontPitch		= pMga->frontPitch;
   pMGADRI->backOffset		= pMga->backOffset;
   pMGADRI->backPitch		= pMga->backPitch;
   pMGADRI->depthOffset		= pMga->depthOffset;
   pMGADRI->depthPitch		= pMga->depthPitch;
   pMGADRI->textureOffset	= pMga->textureOffset;
   pMGADRI->textureSize		= pMga->textureSize;
   pMGADRI->logTextureGranularity = pMga->logTextureGranularity;

   i = mylog2( pMga->agpTextures.size / MGA_NR_TEX_REGIONS );
   if ( i < MGA_LOG_MIN_TEX_REGION_SIZE )
      i = MGA_LOG_MIN_TEX_REGION_SIZE;

   pMGADRI->logAgpTextureGranularity = i;
   pMGADRI->agpTextureOffset = (unsigned int)pMga->agpTextures.handle;
   pMGADRI->agpTextureSize = (unsigned int)pMga->agpTextures.size;

   pMGADRI->registers.handle	= pMga->registers.handle;
   pMGADRI->registers.size	= pMga->registers.size;
   pMGADRI->status.handle	= pMga->status.handle;
   pMGADRI->status.size		= pMga->status.size;
   pMGADRI->primary.handle	= pMga->primary.handle;
   pMGADRI->primary.size	= pMga->primary.size;
   pMGADRI->buffers.handle	= pMga->buffers.handle;
   pMGADRI->buffers.size	= pMga->buffers.size;
   pMGADRI->sarea_priv_offset = sizeof(drm_sarea_t);

   print_client_msg( pMGADRI );

   return 1;
}


/**
 * \brief Validate the fbdev mode.
 * 
 * \param ctx display handle.
 *
 * \return one on success, or zero on failure.
 *
 * Saves some registers and returns 1.
 *
 * \sa mgaValidateMode().
 */
static int mgaValidateMode( const DRIDriverContext *ctx )
{
   return 1;
}


/**
 * \brief Examine mode returned by fbdev.
 * 
 * \param ctx display handle.
 *
 * \return one on success, or zero on failure.
 *
 * Restores registers that fbdev has clobbered and returns 1.
 *
 * \sa mgaValidateMode().
 */
static int mgaPostValidateMode( const DRIDriverContext *ctx )
{
   return 1;
}


/**
 * \brief Initialize the framebuffer device mode
 *
 * \param ctx display handle.
 *
 * \return one on success, or zero on failure.
 *
 * Fills in \p info with some default values and some information from \p ctx
 * and then calls MGAScreenInit() for the screen initialization.
 * 
 * Before exiting clears the framebuffer memomry accessing it directly.
 */
static int mgaInitFBDev( struct DRIDriverContextRec *ctx )
{
   MGAPtr pMga = calloc(1, sizeof(*pMga));

   {
      int  dummy = ctx->shared.virtualWidth;

      switch (ctx->bpp / 8) {
      case 1: dummy = (ctx->shared.virtualWidth + 127) & ~127; break;
      case 2: dummy = (ctx->shared.virtualWidth +  31) &  ~31; break;
      case 3:
      case 4: dummy = (ctx->shared.virtualWidth +  15) &  ~15; break;
      }

      ctx->shared.virtualWidth = dummy;
   }

   ctx->driverPrivate = (void *)pMga;
   
   pMga->agpMode       = MGA_DEFAULT_AGP_MODE;
   pMga->agpSize       = MGA_DEFAULT_AGP_SIZE;
  
   pMga->Chipset = ctx->chipset;

   pMga->IOAddress = ctx->MMIOStart;
   pMga->IOBase    = ctx->MMIOAddress;

   pMga->frontPitch = ctx->shared.virtualWidth * ctx->cpp;

   if (!MGAScreenInit( ctx, pMga ))
      return 0;

   return 1;
}


/**
 * \brief The screen is being closed, so clean up any state and free any
 * resources used by the DRI.
 *
 * \param ctx display handle.
 *
 * Unmaps the SAREA, closes the DRM device file descriptor and frees the driver
 * private data.
 */
static void mgaHaltFBDev( struct DRIDriverContextRec *ctx )
{
    drmUnmap( ctx->pSAREA, ctx->shared.SAREASize );
    drmClose(ctx->drmFD);

    if (ctx->driverPrivate) {
       free(ctx->driverPrivate);
       ctx->driverPrivate = NULL;
    }
}


static int mgaEngineShutdown( const DRIDriverContext *ctx )
{
   fprintf(stderr, "%s() is not yet implemented!\n", __FUNCTION__);

   return 1;
}

static int mgaEngineRestore( const DRIDriverContext *ctx )
{
   fprintf(stderr, "%s() is not yet implemented!\n", __FUNCTION__);

   return 1;
}

/**
 * \brief Exported driver interface for Mini GLX.
 *
 * \sa DRIDriverRec.
 */
struct DRIDriverRec __driDriver = {
   mgaValidateMode,
   mgaPostValidateMode,
   mgaInitFBDev,
   mgaHaltFBDev,
   mgaEngineShutdown,
   mgaEngineRestore,
   0
};




#if 0
void MGADRICloseScreen( ScreenPtr pScreen )
{
   ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
   MGAPtr pMga = MGAPTR(pScrn);
   MGADRIServerPrivatePtr pMga = pMga->DRIServerInfo;
   drmMGAInit init;

   if ( pMga->drmBuffers ) {
      drmUnmapBufs( pMga->drmBuffers );
      pMga->drmBuffers = NULL;
   }

   if (pMga->irq) {
      drmCtlUninstHandler(ctx->drmFD);
      pMga->irq = 0;
   }

   /* Cleanup DMA */
   memset( &init, 0, sizeof(drmMGAInit) );
   init.func = MGA_CLEANUP_DMA;
   drmCommandWrite( ctx->drmFD, DRM_MGA_INIT, &init, sizeof(drmMGAInit) );

   if ( pMga->status.map ) {
      drmUnmap( pMga->status.map, pMga->status.size );
      pMga->status.map = NULL;
   }
   if ( pMga->buffers.map ) {
      drmUnmap( pMga->buffers.map, pMga->buffers.size );
      pMga->buffers.map = NULL;
   }
   if ( pMga->primary.map ) {
      drmUnmap( pMga->primary.map, pMga->primary.size );
      pMga->primary.map = NULL;
   }
   if ( pMga->warp.map ) {
      drmUnmap( pMga->warp.map, pMga->warp.size );
      pMga->warp.map = NULL;
   }

   if ( pMga->agpTextures.map ) {
      drmUnmap( pMga->agpTextures.map, pMga->agpTextures.size );
      pMga->agpTextures.map = NULL;
   }

   if ( pMga->agp.handle ) {
      drmAgpUnbind( ctx->drmFD, pMga->agp.handle );
      drmAgpFree( ctx->drmFD, pMga->agp.handle );
      pMga->agp.handle = 0;
      drmAgpRelease( ctx->drmFD );
   }

   DRICloseScreen( pScreen );

   if ( pMga->pDRIInfo ) {
      if ( pMga->pDRIpMga->devPrivate ) {
	 xfree( pMga->pDRIpMga->devPrivate );
	 pMga->pDRIpMga->devPrivate = 0;
      }
      DRIDestroyInfoRec( pMga->pDRIInfo );
      pMga->pDRIInfo = 0;
   }
   if ( pMga->DRIServerInfo ) {
      xfree( pMga->DRIServerInfo );
      pMga->DRIServerInfo = 0;
   }
   if ( pMga->pVisualConfigs ) {
      xfree( pMga->pVisualConfigs );
   }
   if ( pMga->pVisualConfigsPriv ) {
      xfree( pMga->pVisualConfigsPriv );
   }
}
#endif