path: root/src/i810_hwmc.c

/***************************************************************************

Copyright 2000 Intel Corporation.  All Rights Reserved.

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**************************************************************************/

/*
 * i810_hwmc.c: i810 HWMC Driver
 *
 * Authors:
 *      Matt Sottek <matthew.j.sottek@intel.com>
 *
 *
 */
/* $XFree86: xc/programs/Xserver/hw/xfree86/drivers/i810/i810_hwmc.c,v 1.3 2001/12/04 21:17:56 tsi Exp $ */


#include "xf86.h"
#include "xf86_OSproc.h"
#include "xf86Resources.h"
#include "xf86_ansic.h"
#include "compiler.h"
#include "xf86PciInfo.h"
#include "xf86Pci.h"
#include "xf86fbman.h"
#include "regionstr.h"

#include "i810.h"
#include "i810_dri.h"

#include "xf86xv.h"
#include "xf86xvmc.h"
#include "Xv.h"
#include "XvMC.h"
#include "xaa.h"
#include "xaalocal.h"
#include "dixstruct.h"
#include "fourcc.h"

int I810XvMCCreateContext (ScrnInfoPtr pScrn, XvMCContextPtr pContext,
                           int *num_priv, long **priv );
void I810XvMCDestroyContext (ScrnInfoPtr pScrn, XvMCContextPtr pContext);

int I810XvMCCreateSurface (ScrnInfoPtr pScrn, XvMCSurfacePtr pSurf,
                           int *num_priv, long **priv );
void I810XvMCDestroySurface (ScrnInfoPtr pScrn, XvMCSurfacePtr pSurf);

int I810XvMCCreateSubpicture (ScrnInfoPtr pScrn, XvMCSubpicturePtr pSurf,
                               int *num_priv, long **priv );
void I810XvMCDestroySubpicture (ScrnInfoPtr pScrn, XvMCSubpicturePtr pSurf);


typedef struct {
  drmContext drmcontext;
  unsigned int fbBase;
  unsigned int OverlayOffset;
  unsigned int OverlaySize;
  unsigned int SurfacesOffset;
  unsigned int SurfacesSize;
  char busIdString[10];
  char pad[2];
} I810XvMCCreateContextRec;


static int yv12_subpicture_index_list[2] = 
{
  FOURCC_IA44,
  FOURCC_AI44
};

static XF86MCImageIDList yv12_subpicture_list =
{
  2,
  yv12_subpicture_index_list
};
 
static XF86MCSurfaceInfoRec i810_YV12_mpg2_surface =
{
    FOURCC_YV12,  
    XVMC_CHROMA_FORMAT_420,
    0,
    720,
    576,
    720,
    576,
    XVMC_MPEG_2,
    XVMC_OVERLAID_SURFACE | XVMC_SUBPICTURE_INDEPENDENT_SCALING |
    XVMC_INTRA_UNSIGNED,
    &yv12_subpicture_list
};

static XF86MCSurfaceInfoRec i810_YV12_mpg1_surface =
{
    FOURCC_YV12,  
    XVMC_CHROMA_FORMAT_420,
    0,
    720,
    576,
    720,
    576,
    XVMC_MPEG_1,
    XVMC_OVERLAID_SURFACE | XVMC_SUBPICTURE_INDEPENDENT_SCALING |
    XVMC_INTRA_UNSIGNED,
    &yv12_subpicture_list
};

static XF86MCSurfaceInfoPtr ppSI[2] = 
{
    (XF86MCSurfaceInfoPtr)&i810_YV12_mpg2_surface,
    (XF86MCSurfaceInfoPtr)&i810_YV12_mpg1_surface
};

/* List of subpicture types that we support */
static XF86ImageRec ia44_subpicture = XVIMAGE_IA44;
static XF86ImageRec ai44_subpicture = XVIMAGE_AI44;

static XF86ImagePtr i810_subpicture_list[2] =
{
  (XF86ImagePtr)&ia44_subpicture,
  (XF86ImagePtr)&ai44_subpicture
};

/* Fill in the device dependent adaptor record. 
 * This is named "I810 Video Overlay" because this code falls under the
 * XV extenstion, the name must match or it won't be used.
 *
 * Surface and Subpicture - see above
 * Function pointers to functions below
 */
static XF86MCAdaptorRec pAdapt = 
{
  "I810 Video Overlay",		/* name */
  2,				/* num_surfaces */
  ppSI,				/* surfaces */
  2,				/* num_subpictures */
  i810_subpicture_list,		/* subpictures */
  (xf86XvMCCreateContextProcPtr)I810XvMCCreateContext,
  (xf86XvMCDestroyContextProcPtr)I810XvMCDestroyContext,
  (xf86XvMCCreateSurfaceProcPtr)I810XvMCCreateSurface,
  (xf86XvMCDestroySurfaceProcPtr)I810XvMCDestroySurface,
  (xf86XvMCCreateSubpictureProcPtr)I810XvMCCreateSubpicture,
  (xf86XvMCDestroySubpictureProcPtr)I810XvMCDestroySubpicture
};

static XF86MCAdaptorPtr ppAdapt[1] = 
{
	(XF86MCAdaptorPtr)&pAdapt
};

/**************************************************************************
 *
 *  I810InitMC
 *
 *  Initialize the hardware motion compenstation extention for this 
 *  hardware. The initialization routines want the address of the pointers
 *  to the structures, not the address of the structures. This means we
 *  allocate (or create static?) the pointer memory and pass that 
 *  address. This seems a little convoluted.
 *
 *  We need to allocate memory for the device depended adaptor record. 
 *  This is what holds the pointers to all our device functions.
 *
 *  We need to map the overlay registers into the drm.
 *
 *  We need to map the surfaces into the drm.
 *
 *  Inputs:
 *    Screen pointer
 *
 *  Outputs:
 *    None, this calls the device independent screen initialization 
 *    function.
 *
 *  Revisions:
 *  
 **************************************************************************/
void I810InitMC(ScreenPtr pScreen)
{
  ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
  I810Ptr pI810 = I810PTR(pScrn);
  int i;

  /* Clear the Surface Allocation */
  for(i=0; i<I810_MAX_SURFACES; i++) {
	pI810->surfaceAllocation[i] = 0;
  }  

  /* Cursor is at a page boundary, Overlay regs are not, don't forget */
  if (drmAddMap(pI810->drmSubFD, (drmHandle)pI810->CursorStart,
                4096, DRM_AGP, 0, &pI810->overlay_map) < 0) {
    xf86DrvMsg(pScreen->myNum, X_ERROR, "drmAddMap(overlay) failed\n");
    return;
  }
  if (drmAddMap(pI810->drmSubFD, (drmHandle)pI810->MC.Start,
                pI810->MC.Size, DRM_AGP, 0, &pI810->mc_map) < 0) {
    xf86DrvMsg(pScreen->myNum, X_ERROR, "drmAddMap(MC) failed\n");
    return;
  }
  xf86XvMCScreenInit(pScreen, 1, ppAdapt);
}

/**************************************************************************
 *
 *  I810XvMCCreateContext
 *
 *  Some info about the private data:
 *
 *  Set *num_priv to the number of 32bit words that make up the size of
 *  of the data that priv will point to.
 *
 *  *priv = (long *) xcalloc (elements, sizeof(element))
 *  *num_priv = (elements * sizeof(element)) >> 2;
 *
 **************************************************************************/

int I810XvMCCreateContext (ScrnInfoPtr pScrn, XvMCContextPtr pContext,
                            int *num_priv, long **priv )
{
  I810Ptr pI810 = I810PTR(pScrn);
  DRIInfoPtr pDRIInfo = pI810->pDRIInfo;
  I810XvMCCreateContextRec *contextRec;


  if(!pI810->directRenderingEnabled) {
    xf86DrvMsg(X_ERROR, pScrn->scrnIndex,
        "I810XvMCCreateContext: Cannot use XvMC without DRI!\n");
    return BadAlloc;
  }

  /* Context Already in use! */
  if(pI810->xvmcContext) {
    xf86DrvMsg(X_WARNING, pScrn->scrnIndex,
        "I810XvMCCreateContext: 2 XvMC Contexts Attempted, not supported.\n");
    return BadAlloc;
  }

  *priv = xcalloc(1,sizeof(I810XvMCCreateContextRec));
  contextRec = (I810XvMCCreateContextRec *)*priv;

  if(!*priv) {
    *num_priv = 0;
    return BadAlloc;
  }

  *num_priv = sizeof(I810XvMCCreateContextRec) >> 2;
  if(drmCreateContext(pI810->drmSubFD, &(contextRec->drmcontext) ) < 0) {
    xf86DrvMsg(X_ERROR, pScrn->scrnIndex,
        "I810XvMCCreateContext: Unable to create DRMContext!\n");
    xfree(*priv);
    return BadAlloc;
  }

  drmAuthMagic(pI810->drmSubFD, pContext->flags);

  pI810->xvmcContext = contextRec->drmcontext;
  contextRec->fbBase = pScrn->memPhysBase;

  /* Overlay Regs are at 1024 offset into the Cursor Space */
  contextRec->OverlayOffset = pI810->CursorStart;
  contextRec->OverlaySize = 4096;

  contextRec->SurfacesOffset = pI810->MC.Start;
  contextRec->SurfacesSize = pI810->MC.Size;
  strncpy (contextRec->busIdString, pDRIInfo->busIdString, 9);

  return Success;
}


int I810XvMCCreateSurface (ScrnInfoPtr pScrn, XvMCSurfacePtr pSurf,
                           int *num_priv, long **priv )
{
  I810Ptr pI810 = I810PTR(pScrn);
  int i;

  *priv = (long *)xcalloc(2,sizeof(long));

  if(!*priv) {
    xf86DrvMsg(X_ERROR, pScrn->scrnIndex,
        "I810XvMCCreateSurface: Unable to allocate memory!\n");
    *num_priv = 0;
    return BadAlloc;
  }
  *num_priv = 2;

  /* Surface Arrangement is different based on 6 or 7 Surfaces */
  if(pI810->numSurfaces == 6) {
     for(i=0; i<pI810->numSurfaces; i++) {
       if(!pI810->surfaceAllocation[i]) {
         pI810->surfaceAllocation[i] = pSurf->surface_id;
         /* Y data starts at 2MB offset, each surface is 576k */
         (*priv)[0] = (2*1024*1024 + 576*1024 * i);
         /* UV data starts at 0 offset, each set is 288k */
         (*priv)[1] = (576*512 * i);
         return Success;
       }
     }
  }
  if(pI810->numSurfaces == 7) {
     for(i=0; i<pI810->numSurfaces; i++) {
       if(!pI810->surfaceAllocation[i]) {
         pI810->surfaceAllocation[i] = pSurf->surface_id;
         /* Y data starts at 2.5MB offset, each surface is 576k */
         (*priv)[0] = (2*1024*1024 + 512*1024 + 576*1024 * i);
         /* UV data starts at 0 offset, each set is 288k */
         (*priv)[1] = (576*512 * i);
         return Success;
       }
     }
  }
  (*priv)[0] = 0;
  (*priv)[1] = 0;
  return BadAlloc;
}

int I810XvMCCreateSubpicture (ScrnInfoPtr pScrn, XvMCSubpicturePtr pSubp,
                              int *num_priv, long **priv )
{
  I810Ptr pI810 = I810PTR(pScrn);
  int i;

  *priv = (long *)xcalloc(1,sizeof(long));

  if(!*priv) {
    xf86DrvMsg(X_ERROR, pScrn->scrnIndex,
        "I810XvMCCreateSubpicture: Unable to allocate memory!\n");
    *num_priv = 0;
    return BadAlloc;
  }
  *num_priv = 1;

  if(pI810->numSurfaces == 6) {
     for(i=6; i<8; i++) {
       if(!pI810->surfaceAllocation[i]) {
         pI810->surfaceAllocation[i] = pSubp->subpicture_id;
         /* Subpictures are after the Y surfaces in memory */ 
         (*priv)[0] = (2*1024*1024 + 576*1024 * i);
         return Success;
       }
     }
  }
  if(pI810->numSurfaces == 7) {
     for(i=7; i<9; i++) {
         if(!pI810->surfaceAllocation[i]) {
         pI810->surfaceAllocation[i] = pSubp->subpicture_id;
         /* Subpictures are after the Y surfaces in memory */
         (*priv)[0] = (2*1024*1024 + 512*1024 + 576*1024 * i);
         return Success;
       }
     }
  }

  (*priv)[0] = 0;
  return BadAlloc;
}

void I810XvMCDestroyContext (ScrnInfoPtr pScrn, XvMCContextPtr pContext)
{
  I810Ptr pI810 = I810PTR(pScrn);

  drmDestroyContext(pI810->drmSubFD,pI810->xvmcContext);
  pI810->xvmcContext = 0;
}

void I810XvMCDestroySurface (ScrnInfoPtr pScrn, XvMCSurfacePtr pSurf)
{
  I810Ptr pI810 = I810PTR(pScrn);
  int i;

  for(i=0; i<I810_MAX_SURFACES; i++) {
    if(pI810->surfaceAllocation[i] == pSurf->surface_id) {
      pI810->surfaceAllocation[i] = 0;
      return;
    }
  }
  return;
}

void I810XvMCDestroySubpicture (ScrnInfoPtr pScrn, XvMCSubpicturePtr pSubp)
{
  I810Ptr pI810 = I810PTR(pScrn);
  int i;

  for(i=pI810->numSurfaces; i<I810_MAX_SURFACES + I810_MAX_SUBPICTURES; i++) {
    if(pI810->surfaceAllocation[i] == pSubp->subpicture_id) {
      pI810->surfaceAllocation[i] = 0;
      return;
    }
  }
  return;
}