i810_dri.c

是由intel提供的针对intel显卡915以上系列的linux驱动

/* $XFree86: xc/programs/Xserver/hw/xfree86/drivers/i810/i810_dri.c,v 1.41 2003/09/24 02:43:23 dawes Exp $ */
/*
 * Reformatted with GNU indent (2.2.8), using the following options:
 *
 *    -bad -bap -c41 -cd0 -ncdb -ci6 -cli0 -cp0 -ncs -d0 -di3 -i3 -ip3 -l78
 *    -lp -npcs -psl -sob -ss -br -ce -sc -hnl
 *
 * This provides a good match with the original i810 code and preferred
 * XFree86 formatting conventions.
 *
 * When editing this driver, please follow the existing formatting, and edit
 * with <TAB> characters expanded at 8-column intervals.
 */

#include "xf86.h"
#include "xf86_OSproc.h"
#include "xf86_ansic.h"
#include "xf86Priv.h"

#include "xf86PciInfo.h"
#include "xf86Pci.h"

#include "windowstr.h"
#include "shadow.h"
#include "shadowfb.h"

#include "GL/glxtokens.h"

#include "i810.h"
#include "i810_dri.h"
#include "i830.h"

static char I810KernelDriverName[] = "i810";
static char I810ClientDriverName[] = "i810";

static Bool I810InitVisualConfigs(ScreenPtr pScreen);
static Bool I810CreateContext(ScreenPtr pScreen, VisualPtr visual,
			      drm_context_t hwContext, void *pVisualConfigPriv,
			      DRIContextType contextStore);
static void I810DestroyContext(ScreenPtr pScreen, drm_context_t hwContext,
			       DRIContextType contextStore);
static void I810DRISwapContext(ScreenPtr pScreen, DRISyncType syncType,
			       DRIContextType readContextType,
			       void *readContextStore,
			       DRIContextType writeContextType,
			       void *writeContextStore);
static void I810DRIInitBuffers(WindowPtr pWin, RegionPtr prgn, CARD32 index);
static void I810DRIMoveBuffers(WindowPtr pParent, DDXPointRec ptOldOrg,
			       RegionPtr prgnSrc, CARD32 index);


static Bool I810DRIOpenFullScreen(ScreenPtr pScreen);
static Bool I810DRICloseFullScreen(ScreenPtr pScreen);
static void I810EnablePageFlip(ScreenPtr pScreen);
static void I810DisablePageFlip(ScreenPtr pScreen);
static void I810DRITransitionSingleToMulti3d(ScreenPtr pScreen);
static void I810DRITransitionMultiToSingle3d(ScreenPtr pScreen);
static void I810DRITransitionTo3d(ScreenPtr pScreen);
static void I810DRITransitionTo2d(ScreenPtr pScreen);

static void I810DRIRefreshArea(ScrnInfoPtr pScrn, int num, BoxPtr pbox);

extern void GlxSetVisualConfigs(int nconfigs,
				__GLXvisualConfig * configs,
				void **configprivs);

static int i810_pitches[] = {
   512,
   1024,
   2048,
   4096,
   0
};

static int i810_pitch_flags[] = {
   0x0,
   0x1,
   0x2,
   0x3,
   0
};

static unsigned int i810_drm_version = 0;

Bool
I810CleanupDma(ScrnInfoPtr pScrn)
{
   I810Ptr pI810 = I810PTR(pScrn);
   drmI810Init info;

   memset(&info, 0, sizeof(drmI810Init));
   info.func = I810_CLEANUP_DMA;

   if (drmCommandWrite(pI810->drmSubFD, DRM_I810_INIT,
		       &info, sizeof(drmI810Init))) {
      xf86DrvMsg(pScrn->scrnIndex, X_ERROR,
		 "[dri] I810 Dma Cleanup Failed\n");
      return FALSE;
   }

   return TRUE;
}

Bool
I810InitDma(ScrnInfoPtr pScrn)
{
   I810Ptr pI810 = I810PTR(pScrn);
   I810RingBuffer *ring = pI810->LpRing;
   I810DRIPtr pI810DRI = (I810DRIPtr) pI810->pDRIInfo->devPrivate;
   drmI810Init info;

   memset(&info, 0, sizeof(drmI810Init));

   info.ring_start = ring->mem.Start;
   info.ring_end = ring->mem.End;
   info.ring_size = ring->mem.Size;
   info.mmio_offset = (unsigned int)pI810DRI->regs;
   info.buffers_offset = (unsigned int)pI810->buffer_map;
   info.sarea_priv_offset = sizeof(XF86DRISAREARec);

   info.front_offset = 0;
   info.back_offset = pI810->BackBuffer.Start;
   info.depth_offset = pI810->DepthBuffer.Start;
   info.overlay_offset = pI810->OverlayStart;
   info.overlay_physical = pI810->OverlayPhysical;
   info.w = pScrn->virtualX;
   info.h = pScrn->virtualY;
   info.pitch = pI810->auxPitch;
   info.pitch_bits = pI810->auxPitchBits;

   /* We require DRM v1.2 or greater. Since DRM v1.2 broke compatibility
    * we created a new v1.4 that supports a new init function. Eventually the
    * old init function will go away. If you change the drm interface, make a
    * new init type too so that we can detect the new client.
    */
   switch(i810_drm_version) {
   case ((1<<16) | 0):
   case ((1<<16) | 1):
   case ((1<<16) | 2):
   case ((1<<16) | 3):
      /* Use OLD drm < 1.4 init */
      info.func = I810_INIT_DMA;
      xf86DrvMsg(pScrn->scrnIndex, X_INFO, "[drm] Init PRE v1.4 interface.\n");
      break;
   default:
   case ((1<<16) | 4):
      /*  DRM version 1.3 or greater init */
      info.func = I810_INIT_DMA_1_4;
      xf86DrvMsg(pScrn->scrnIndex, X_INFO, "[drm] Init v1.4 interface.\n");
      break;
   }

   if (drmCommandWrite(pI810->drmSubFD, DRM_I810_INIT,
		       &info, sizeof(drmI810Init))) {
      xf86DrvMsg(pScrn->scrnIndex, X_ERROR,
		 "[drm] I810 Dma Initialization failed.\n");
      return FALSE;
   }

   return TRUE;
}

static Bool
I810InitVisualConfigs(ScreenPtr pScreen)
{
   ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
   I810Ptr pI810 = I810PTR(pScrn);
   int numConfigs = 0;
   __GLXvisualConfig *pConfigs = 0;
   I810ConfigPrivPtr pI810Configs = 0;
   I810ConfigPrivPtr *pI810ConfigPtrs = 0;
   int accum, stencil, db, depth;
   int i;

   switch (pScrn->bitsPerPixel) {
   case 8:
   case 24:
   case 32:
      break;
   case 16:
      numConfigs = 8;

      pConfigs =
	    (__GLXvisualConfig *) xcalloc(sizeof(__GLXvisualConfig),
					  numConfigs);
      if (!pConfigs)
	 return FALSE;

      pI810Configs =
	    (I810ConfigPrivPtr) xcalloc(sizeof(I810ConfigPrivRec),
					numConfigs);
      if (!pI810Configs) {
	 xfree(pConfigs);
	 return FALSE;
      }

      pI810ConfigPtrs =
	    (I810ConfigPrivPtr *) xcalloc(sizeof(I810ConfigPrivPtr),
					  numConfigs);
      if (!pI810ConfigPtrs) {
	 xfree(pConfigs);
	 xfree(pI810Configs);
	 return FALSE;
      }

      for (i = 0; i < numConfigs; i++)
	 pI810ConfigPtrs[i] = &pI810Configs[i];

      i = 0;
      depth = 1;
      for (accum = 0; accum <= 1; accum++) {
	 for (stencil = 0; stencil <= 1; stencil++) {
	    for (db = 1; db >= 0; db--) {
	       pConfigs[i].vid = -1;
	       pConfigs[i].class = -1;
	       pConfigs[i].rgba = TRUE;
	       pConfigs[i].redSize = 5;
	       pConfigs[i].greenSize = 6;
	       pConfigs[i].blueSize = 5;
	       pConfigs[i].redMask = 0x0000F800;
	       pConfigs[i].greenMask = 0x000007E0;
	       pConfigs[i].blueMask = 0x0000001F;
	       pConfigs[i].alphaMask = 0;
	       if (accum) {
		  pConfigs[i].accumRedSize = 16;
		  pConfigs[i].accumGreenSize = 16;
		  pConfigs[i].accumBlueSize = 16;
		  pConfigs[i].accumAlphaSize = 0;
	       } else {
		  pConfigs[i].accumRedSize = 0;
		  pConfigs[i].accumGreenSize = 0;
		  pConfigs[i].accumBlueSize = 0;
		  pConfigs[i].accumAlphaSize = 0;
	       }
	       pConfigs[i].doubleBuffer = db ? TRUE : FALSE;
	       pConfigs[i].stereo = FALSE;
	       pConfigs[i].bufferSize = 16;
	       if (depth)
		  pConfigs[i].depthSize = 16;
	       else
		  pConfigs[i].depthSize = 0;
	       if (stencil)
		  pConfigs[i].stencilSize = 8;
	       else
		  pConfigs[i].stencilSize = 0;
	       pConfigs[i].auxBuffers = 0;
	       pConfigs[i].level = 0;
	       if (stencil || accum)
		  pConfigs[i].visualRating = GLX_SLOW_CONFIG;
	       else
		  pConfigs[i].visualRating = GLX_NONE;
	       pConfigs[i].transparentPixel = GLX_NONE;
	       pConfigs[i].transparentRed = 0;
	       pConfigs[i].transparentGreen = 0;
	       pConfigs[i].transparentBlue = 0;
	       pConfigs[i].transparentAlpha = 0;
	       pConfigs[i].transparentIndex = 0;
	       i++;
	    }
	 }
      }
      assert(i == numConfigs);
      break;
   }
   pI810->numVisualConfigs = numConfigs;
   pI810->pVisualConfigs = pConfigs;
   pI810->pVisualConfigsPriv = pI810Configs;
   GlxSetVisualConfigs(numConfigs, pConfigs, (void **)pI810ConfigPtrs);
   return TRUE;
}

static unsigned int
mylog2(unsigned int n)
{
   unsigned int log2 = 1;

   while (n > 1)
      n >>= 1, log2++;
   return log2;
}

Bool
I810DRIScreenInit(ScreenPtr pScreen)
{
   ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
   I810Ptr pI810 = I810PTR(pScrn);
   DRIInfoPtr pDRIInfo;
   I810DRIPtr pI810DRI;
   unsigned long tom;
   unsigned long agpHandle;
   unsigned long dcacheHandle;
   int sysmem_size = 0;
   int back_size = 0;
   unsigned int pitch_idx = 0;
   int bufs;
   int width = pScrn->displayWidth * pI810->cpp;
   int i;

   /* Hardware 3D rendering only implemented for 16bpp */
   /* And it only works for 5:6:5 (Mark) */
   if (pScrn->depth != 16)
      return FALSE;

   /* Check that the GLX, DRI, and DRM modules have been loaded by testing
    * for known symbols in each module. */
   if (!xf86LoaderCheckSymbol("GlxSetVisualConfigs"))
      return FALSE;
   if (!xf86LoaderCheckSymbol("DRIScreenInit"))
      return FALSE;
   if (!xf86LoaderCheckSymbol("drmAvailable"))
      return FALSE;
   if (!xf86LoaderCheckSymbol("DRIQueryVersion")) {
      xf86DrvMsg(pScreen->myNum, X_ERROR,
		 "[dri] I810DRIScreenInit failed (libdri.a too old)\n");
      return FALSE;
   }

   /* Check the DRI version */
   {
      int major, minor, patch;

      DRIQueryVersion(&major, &minor, &patch);
      if (major != 4 || minor < 0) {
	 xf86DrvMsg(pScreen->myNum, X_ERROR,
		    "[dri] I810DRIScreenInit failed because of a version mismatch.\n"
		    "[dri] libDRI version is %d.%d.%d but version 4.0.x is needed.\n"
		    "[dri] Disabling DRI.\n", major, minor, patch);
	 return FALSE;
      }
   }

   pDRIInfo = DRICreateInfoRec();
   if (!pDRIInfo) {
      xf86DrvMsg(pScreen->myNum, X_ERROR,
		 "[dri] DRICreateInfoRec failed.  Disabling DRI.\n");
      return FALSE;
   }

/*     pDRIInfo->wrap.ValidateTree = 0;    */
/*     pDRIInfo->wrap.PostValidateTree = 0;    */

   pI810->pDRIInfo = pDRIInfo;
   pI810->LockHeld = 0;

   pDRIInfo->drmDriverName = I810KernelDriverName;
   pDRIInfo->clientDriverName = I810ClientDriverName;
   if (xf86LoaderCheckSymbol("DRICreatePCIBusID")) {
      pDRIInfo->busIdString = DRICreatePCIBusID(pI810->PciInfo);
   } else {
      pDRIInfo->busIdString = xalloc(64);
      sprintf(pDRIInfo->busIdString, "PCI:%d:%d:%d",
	      ((pciConfigPtr) pI810->PciInfo->thisCard)->busnum,
	      ((pciConfigPtr) pI810->PciInfo->thisCard)->devnum,
	      ((pciConfigPtr) pI810->PciInfo->thisCard)->funcnum);
   }
   pDRIInfo->ddxDriverMajorVersion = INTEL_MAJOR_VERSION;
   pDRIInfo->ddxDriverMinorVersion = INTEL_MINOR_VERSION;
   pDRIInfo->ddxDriverPatchVersion = INTEL_PATCHLEVEL;
   pDRIInfo->frameBufferPhysicalAddress = pI810->LinearAddr;
   pDRIInfo->frameBufferSize = (((pScrn->displayWidth *
				  pScrn->virtualY * pI810->cpp) +
				 4096 - 1) / 4096) * 4096;

   pDRIInfo->frameBufferStride = pScrn->displayWidth * pI810->cpp;
   pDRIInfo->ddxDrawableTableEntry = I810_MAX_DRAWABLES;

   if (SAREA_MAX_DRAWABLES < I810_MAX_DRAWABLES)
      pDRIInfo->maxDrawableTableEntry = SAREA_MAX_DRAWABLES;
   else
      pDRIInfo->maxDrawableTableEntry = I810_MAX_DRAWABLES;

   /* For now the mapping works by using a fixed size defined
    * in the SAREA header
    */
   if (sizeof(XF86DRISAREARec) + sizeof(I810SAREARec) > SAREA_MAX) {
      xf86DrvMsg(pScreen->myNum, X_ERROR,
		 "[dri] Data does not fit in SAREA\n");
      return FALSE;
   }
   pDRIInfo->SAREASize = SAREA_MAX;

   if (!(pI810DRI = (I810DRIPtr) xcalloc(sizeof(I810DRIRec), 1))) {
      DRIDestroyInfoRec(pI810->pDRIInfo);
      pI810->pDRIInfo = 0;
      return FALSE;
   }
   pDRIInfo->devPrivate = pI810DRI;
   pDRIInfo->devPrivateSize = sizeof(I810DRIRec);
   pDRIInfo->contextSize = sizeof(I810DRIContextRec);