i810_dri.c

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

static int I810MemoryInit( const DRIDriverContext *ctx, I810Ptr info )
{
   int        width_bytes = ctx->shared.virtualWidth * ctx->cpp;
   int        cpp         = ctx->cpp;
   int        bufferSize  = (ctx->shared.virtualHeight * width_bytes);
   int        depthSize   = (((ctx->shared.virtualHeight+15) & ~15) * width_bytes);
   int        l;

   if (drmAddMap(ctx->drmFD, (drm_handle_t) info->BackBuffer.Start,
		 info->BackBuffer.Size, DRM_AGP, 0,
		 &info->backbuffer) < 0) {
     fprintf(stderr, "[drm] drmAddMap(backbuffer) failed.  Disabling DRI\n");
     return 0;
   }
   
   if (drmAddMap(ctx->drmFD, (drm_handle_t) info->DepthBuffer.Start,
		 info->DepthBuffer.Size, DRM_AGP, 0,
		 &info->depthbuffer) < 0) {
     fprintf(stderr, "[drm] drmAddMap(depthbuffer) failed.  Disabling DRI.\n");
      return 0;
   }

   if (!I810AllocLow(&(info->FrontBuffer), &(info->SysMem), (((ctx->shared.virtualHeight * width_bytes) + 4095) & ~4095)))
   {
     fprintf(stderr,"Framebuffer allocation failed\n");
     return 0;
   }
   else
     fprintf(stderr,"Frame buffer at 0x%.8x (%luk, %lu bytes)\n",
	     info->FrontBuffer.Start,
	     info->FrontBuffer.Size / 1024, info->FrontBuffer.Size);
   
   memset(&(info->LpRing), 0, sizeof(I810RingBuffer));
   if (I810AllocLow(&(info->LpRing.mem), &(info->SysMem), 16 * 4096)) {
     fprintf(stderr,
	    "Ring buffer at 0x%.8x (%luk, %lu bytes)\n",
	     info->LpRing.mem.Start,
	     info->LpRing.mem.Size / 1024, info->LpRing.mem.Size);
     
     info->LpRing.tail_mask = info->LpRing.mem.Size - 1;
     info->LpRing.virtual_start = info->LpRing.mem.Start;
     info->LpRing.head = 0;
     info->LpRing.tail = 0;
     info->LpRing.space = 0;
   } else {
     fprintf(stderr, "Ring buffer allocation failed\n");
     return (0);
   }

   /* Allocate buffer memory */
   I810AllocHigh(&(info->BufferMem), &(info->SysMem),
		 I810_DMA_BUF_NR * I810_DMA_BUF_SZ);
   

   fprintf(stderr, "[dri] Buffer map : %lx\n",
	      info->BufferMem.Start);

   if (info->BufferMem.Start == 0 ||
       info->BufferMem.End - info->BufferMem.Start >
       I810_DMA_BUF_NR * I810_DMA_BUF_SZ) {
     fprintf(stderr,"[dri] Not enough memory for dma buffers.  Disabling DRI.\n");
     return 0;
   }

   if (drmAddMap(ctx->drmFD, (drm_handle_t) info->BufferMem.Start,
		 info->BufferMem.Size, DRM_AGP, 0, &info->buffer_map) < 0) {
     fprintf(stderr, "[drm] drmAddMap(buffer_map) failed.  Disabling DRI.\n");
     return 0;
   }

   if (drmAddMap(ctx->drmFD, (drm_handle_t) info->LpRing.mem.Start,
		 info->LpRing.mem.Size, DRM_AGP, 0, &info->ring_map) < 0) {
     fprintf(stderr, "[drm] drmAddMap(ring_map) failed.  Disabling DRI. \n");
     return 0;
   }

   /* Front, back and depth buffers - everything else texture??
    */
   info->textureSize = info->SysMem.Size;

   if (info->textureSize < 0) 
      return 0;

   
   l = I810MinBits((info->textureSize-1) / I810_NR_TEX_REGIONS);
   if (l < I810_LOG_MIN_TEX_REGION_SIZE) l = I810_LOG_MIN_TEX_REGION_SIZE;

   /* Round the texture size up to the nearest whole number of
    * texture regions.  Again, be greedy about this, don't
    * round down.
    */
   info->logTextureGranularity = l;
   info->textureSize = (info->textureSize >> l) << l;

   /* Set a minimum usable local texture heap size.  This will fit
    * two 256x256x32bpp textures.
    */
   if (info->textureSize < 512 * 1024) {
      info->textureOffset = 0;
      info->textureSize = 0;
   }

   I810AllocLow(&(info->TexMem), &(info->SysMem), info->textureSize);

   if (drmAddMap(ctx->drmFD, (drm_handle_t) info->TexMem.Start,
		 info->TexMem.Size, DRM_AGP, 0, &info->textures) < 0) {
     fprintf(stderr,
		 "[drm] drmAddMap(textures) failed.  Disabling DRI.\n");
      return 0;
   }

   /* Reserve space for textures */
   fprintf(stderr, 
	   "Will use back buffer at offset 0x%x\n",
	   info->BackOffset);
   fprintf(stderr, 
	   "Will use depth buffer at offset 0x%x\n",
	   info->DepthOffset);
   fprintf(stderr, 
	   "Will use %d kb for textures at offset 0x%x\n",
	   info->TexMem.Size/1024, info->TexMem.Start);

   return 1;
} 



/**
 * Called at the start of each server generation.
 *
 * \param ctx display handle.
 * \param info driver private data.
 *
 * \return non-zero on success, or zero on failure.
 *
 * Performs static frame buffer allocation. Opens the DRM device and add maps
 * to the SAREA, framebuffer and MMIO regions. Fills in \p info with more
 * information. Creates a \e server context to grab the lock for the
 * initialization ioctls and calls the other initilization functions in this
 * file. Starts the CP engine via the DRM_I810_CP_START command.
 *
 * Setups a I810DRIRec structure to be passed to i810_dri.so for its
 * initialization.
 */
static int I810ScreenInit( DRIDriverContext *ctx, I810Ptr info )
{
   I810DRIPtr   pI810DRI;
   int err;

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

   /* from XFree86 driver */
   info->DepthOffset = 0x3000000;
   info->BackOffset = 0x3800000;
   {
      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;
      } 
   }


   info->regsSize = ctx->MMIOSize;
   ctx->shared.SAREASize = 0x2000;

   /* Note that drmOpen will try to load the kernel module, if needed. */
   ctx->drmFD = drmOpen("i810", 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);

   if (drmAddMap(ctx->drmFD, 
		 ctx->MMIOStart,
		 ctx->MMIOSize,
		 DRM_REGISTERS, 
		 DRM_READ_ONLY, 
		 &info->regs) < 0) {
      fprintf(stderr, "[drm] drmAddMap mmio failed\n");	
      return 0;
   }
   fprintf(stderr,
	   "[drm] register handle = 0x%08x\n", info->regs);

   I810DRIAgpPreInit(ctx, info);
   /* Need to AddMap the framebuffer and mmio regions here:
    */
   if (drmAddMap( ctx->drmFD,
		  (drm_handle_t)ctx->FBStart,
		  ctx->FBSize,
		  DRM_FRAME_BUFFER,
#ifndef _EMBEDDED
		  0,
#else
		  DRM_READ_ONLY,
#endif
		  &ctx->shared.hFrameBuffer) < 0)
   {
      fprintf(stderr, "[drm] drmAddMap framebuffer failed\n");
      return 0;
   }

   fprintf(stderr, "[drm] framebuffer handle = 0x%08lx\n",
	   ctx->shared.hFrameBuffer);

   /* Check the i810 DRM version */
   if (!I810CheckDRMVersion(ctx, info)) {
      return 0;
   }

   /* Initialize AGP */
   if (!I810DRIAgpInit(ctx, info)) {
      return 0;
   }


   /* Memory manager setup */
   if (!I810MemoryInit(ctx, info)) {
      return 0;
   }

   /* Initialize the SAREA private data structure */
   {
      I810SAREAPtr pSAREAPriv;
      pSAREAPriv = (I810SAREAPtr)(((char*)ctx->pSAREA) + 
					sizeof(drm_sarea_t));
      memset(pSAREAPriv, 0, sizeof(*pSAREAPriv));
      //      pSAREAPriv->pf_enabled=1;
   }


   /* 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 vertex buffers list */
   if (!I810DRIBufInit(ctx, info)) {
      fprintf(stderr, "I810DRIBufInit failed\n");
      DRM_UNLOCK(ctx->drmFD, ctx->pSAREA, ctx->serverContext);
      return 0;
   }

   /* Initialize the kernel data structures */
   if (!I810DRIKernelInit(ctx, info)) {
      fprintf(stderr, "I810DRIKernelInit failed\n");
      DRM_UNLOCK(ctx->drmFD, ctx->pSAREA, ctx->serverContext);
      return 0;
   }

   /* Initialize IRQ */
   I810DRIIrqInit(ctx, info);

   /* 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.
    */
#if 0
   memset((char *)ctx->FBAddress,
	  0,
	  info->auxPitch * ctx->cpp * ctx->shared.virtualHeight );

   memset((char *)info->backbuffer,
	  0,
	  info->auxPitch * ctx->cpp * ctx->shared.virtualHeight );
#endif

   /* This is the struct passed to i810_dri.so for its initialization */
   ctx->driverClientMsg = malloc(sizeof(I810DRIRec));
   ctx->driverClientMsgSize = sizeof(I810DRIRec);
   pI810DRI                    = (I810DRIPtr)ctx->driverClientMsg;

   pI810DRI->regs              = info->regs;
   pI810DRI->regsSize          = info->regsSize;
   // regsMap is unused

   pI810DRI->backbufferSize    = info->BackBuffer.Size;
   pI810DRI->backbuffer        = info->backbuffer;

   pI810DRI->depthbufferSize   = info->DepthBuffer.Size;
   pI810DRI->depthbuffer       = info->depthbuffer;

   pI810DRI->textures          = info->textures;
   pI810DRI->textureSize       = info->textureSize;

   pI810DRI->agp_buffers       = info->buffer_map;
   pI810DRI->agp_buf_size      = info->BufferMem.Size;

   pI810DRI->deviceID          = info->Chipset;
   pI810DRI->width             = ctx->shared.virtualWidth;
   pI810DRI->height            = ctx->shared.virtualHeight;
   pI810DRI->mem               = ctx->shared.fbSize;
   pI810DRI->cpp               = ctx->bpp / 8;
   pI810DRI->bitsPerPixel      = ctx->bpp;
   pI810DRI->fbOffset          = info->FrontBuffer.Start;
   pI810DRI->fbStride          = info->auxPitch;
   
   pI810DRI->backOffset        = info->BackBuffer.Start;
   pI810DRI->depthOffset       = info->DepthBuffer.Start;

   pI810DRI->auxPitch          = info->auxPitch;
   pI810DRI->auxPitchBits      = info->auxPitchBits;

   pI810DRI->logTextureGranularity = info->logTextureGranularity;
   pI810DRI->textureOffset     = info->TexMem.Start;
  
   pI810DRI->ringOffset        = info->LpRing.mem.Start;
   pI810DRI->ringSize          = info->LpRing.mem.Size;

   // drmBufs looks unused 
   pI810DRI->irq               = info->irq;
   pI810DRI->sarea_priv_offset = sizeof(drm_sarea_t);

   /* Don't release the lock now - let the VT switch handler do it. */
   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 i810ValidateMode().
 */
static int i810ValidateMode( const DRIDriverContext *ctx )
{
   unsigned char *I810MMIO = ctx->MMIOAddress;
   I810Ptr info = ctx->driverPrivate;

   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 i810ValidateMode().
 */
static int i810PostValidateMode( const DRIDriverContext *ctx )
{
   unsigned char *I810MMIO = ctx->MMIOAddress;
   I810Ptr info = ctx->driverPrivate;

   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 I810ScreenInit() for the screen initialization.
 * 
 * Before exiting clears the framebuffer memory accessing it directly.
 */
static int i810InitFBDev( DRIDriverContext *ctx )
{
  I810Ptr info = calloc(1, sizeof(*info));

   {
      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 *)info;
   
   info->Chipset = ctx->chipset;

   if (!I810ScreenInit( ctx, info ))
      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 i810HaltFBDev( DRIDriverContext *ctx )
{
    drmUnmap( ctx->pSAREA, ctx->shared.SAREASize );
    drmClose(ctx->drmFD);

    if (ctx->driverPrivate) {
       free(ctx->driverPrivate);
       ctx->driverPrivate = 0;
    }
}


extern void i810NotifyFocus( int );

/**
 * \brief Exported driver interface for Mini GLX.
 *
 * \sa DRIDriverRec.
 */
const struct DRIDriverRec __driDriver = {
   i810ValidateMode,
   i810PostValidateMode,
   i810InitFBDev,
   i810HaltFBDev,
   I810EngineShutdown,
   I810EngineRestore,  
#ifndef _EMBEDDED
   0,
#else
   i810NotifyFocus, 
#endif
};