/* -*- mode: c; c-basic-offset: 3 -*- */
/*
 * Copyright 2000 Gareth Hughes
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * GARETH HUGHES BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

/*
 * Authors:
 *	Gareth Hughes <gareth@valinux.com>
 *	Leif Delgass <ldelgass@retinalburn.net>
 *	Jos�Fonseca <j_r_fonseca@yahoo.co.uk>
 */

#include "mach64_context.h"
#include "mach64_ioctl.h"
#include "mach64_span.h"

#include "main/context.h"
#include "main/imports.h"
#include "main/framebuffer.h"
#include "main/renderbuffer.h"

#include "utils.h"
#include "vblank.h"

#include "GL/internal/dri_interface.h"

/* Mach64 configuration
 */
#include "xmlpool.h"

PUBLIC const char __driConfigOptions[] =
DRI_CONF_BEGIN
    DRI_CONF_SECTION_PERFORMANCE
        DRI_CONF_VBLANK_MODE(DRI_CONF_VBLANK_DEF_INTERVAL_0)
    DRI_CONF_SECTION_END
    DRI_CONF_SECTION_DEBUG
        DRI_CONF_NO_RAST(false)
#if ENABLE_PERF_BOXES
        DRI_CONF_PERFORMANCE_BOXES(false)
#endif
    DRI_CONF_SECTION_END
DRI_CONF_END;
#if ENABLE_PERF_BOXES
static const GLuint __driNConfigOptions = 3;
#else
static const GLuint __driNConfigOptions = 2;
#endif

static const __DRIconfig **
mach64FillInModes( __DRIscreen *psp,
		   unsigned pixel_bits, unsigned depth_bits,
		   unsigned stencil_bits, GLboolean have_back_buffer )
{
    __DRIconfig **configs;
    struct gl_config * m;
    GLenum fb_format;
    GLenum fb_type;
    unsigned depth_buffer_factor;
    unsigned back_buffer_factor;
    unsigned i;

    /* Right now GLX_SWAP_COPY_OML isn't supported, but it would be easy
     * enough to add support.  Basically, if a context is created with an
     * fbconfig where the swap method is GLX_SWAP_COPY_OML, pageflipping
     * will never be used.
     */
    static const GLenum back_buffer_modes[] = {
	GLX_NONE, GLX_SWAP_UNDEFINED_OML /*, GLX_SWAP_COPY_OML */
    };

    uint8_t depth_bits_array[2];
    uint8_t stencil_bits_array[2];
    uint8_t msaa_samples_array[1];

    depth_bits_array[0] = depth_bits;
    depth_bits_array[1] = depth_bits;
    
    /* Just like with the accumulation buffer, always provide some modes
     * with a stencil buffer.  It will be a sw fallback, but some apps won't
     * care about that.
     */
    stencil_bits_array[0] = 0;
    stencil_bits_array[1] = (stencil_bits == 0) ? 8 : stencil_bits;

    msaa_samples_array[0] = 0;

    depth_buffer_factor = ((depth_bits != 0) || (stencil_bits != 0)) ? 2 : 1;
    back_buffer_factor  = (have_back_buffer) ? 2 : 1;

    if (pixel_bits == 16) {
       fb_format = GL_RGB;
       fb_type = GL_UNSIGNED_SHORT_5_6_5;
    }
    else {
       fb_format = GL_BGRA;
       fb_type = GL_UNSIGNED_INT_8_8_8_8_REV;
    }

    configs = driCreateConfigs(fb_format, fb_type,
			       depth_bits_array, stencil_bits_array,
			       depth_buffer_factor, back_buffer_modes,
			       back_buffer_factor,
                               msaa_samples_array, 1, GL_TRUE);
    if (configs == NULL) {
       fprintf(stderr, "[%s:%u] Error creating FBConfig!\n",
	       __func__, __LINE__);
       return NULL;
    }

    /* Mark the visual as slow if there are "fake" stencil bits.
     */
    for (i = 0; configs[i]; i++) {
       m = &configs[i]->modes;
       if ((m->stencilBits != 0) && (m->stencilBits != stencil_bits)) {
	  m->visualRating = GLX_SLOW_CONFIG;
       }
    }

    return (const __DRIconfig **) configs;
}


/* Create the device specific screen private data struct.
 */
static mach64ScreenRec *
mach64CreateScreen( __DRIscreen *sPriv )
{
   mach64ScreenPtr mach64Screen;
   ATIDRIPtr serverInfo = (ATIDRIPtr)sPriv->pDevPriv;
   int i;

   if (sPriv->devPrivSize != sizeof(ATIDRIRec)) {
      fprintf(stderr,"\nERROR!  sizeof(ATIDRIRec) does not match passed size from device driver\n");
      return GL_FALSE;
   }

   if ( MACH64_DEBUG & DEBUG_VERBOSE_DRI ) 
      fprintf( stderr, "%s\n", __FUNCTION__ );

   /* Allocate the private area */
   mach64Screen = (mach64ScreenPtr) CALLOC( sizeof(*mach64Screen) );
   if ( !mach64Screen ) return NULL;

   /* parse information in __driConfigOptions */
   driParseOptionInfo (&mach64Screen->optionCache,
		       __driConfigOptions, __driNConfigOptions);

   mach64Screen->IsPCI = serverInfo->IsPCI;

   {
      drm_mach64_getparam_t gp;
      int ret;

      gp.param = MACH64_PARAM_IRQ_NR;
      gp.value = (void *) &mach64Screen->irq;

      ret = drmCommandWriteRead( sPriv->fd, DRM_MACH64_GETPARAM,
				    &gp, sizeof(gp));
      if (ret) {
         fprintf(stderr, "DRM_MACH64_GETPARAM (MACH64_PARAM_IRQ_NR): %d\n", ret);
         FREE( mach64Screen );
         return NULL;
      }
   }

   mach64Screen->mmio.handle = serverInfo->regs;
   mach64Screen->mmio.size   = serverInfo->regsSize;
   if ( drmMap( sPriv->fd,
		mach64Screen->mmio.handle,
		mach64Screen->mmio.size,
		(drmAddressPtr)&mach64Screen->mmio.map ) != 0 ) {
      FREE( mach64Screen );
      return NULL;
   }

   mach64Screen->buffers = drmMapBufs( sPriv->fd );
   if ( !mach64Screen->buffers ) {
      drmUnmap( (drmAddress)mach64Screen->mmio.map,
		mach64Screen->mmio.size );
      FREE( mach64Screen );
      return NULL;
   }

   if ( !mach64Screen->IsPCI ) {
      mach64Screen->agpTextures.handle = serverInfo->agp;
      mach64Screen->agpTextures.size   = serverInfo->agpSize;
      if ( drmMap( sPriv->fd,
		   mach64Screen->agpTextures.handle,
		   mach64Screen->agpTextures.size,
		   (drmAddressPtr)&mach64Screen->agpTextures.map ) ) {
	 drmUnmapBufs( mach64Screen->buffers );
	 drmUnmap( (drmAddress)mach64Screen->mmio.map, mach64Screen->mmio.size );
	 FREE( mach64Screen );
	 return NULL;
      }
   }

   mach64Screen->AGPMode	= serverInfo->AGPMode;

   mach64Screen->chipset	= serverInfo->chipset;
   mach64Screen->width		= serverInfo->width;
   mach64Screen->height		= serverInfo->height;
   mach64Screen->mem		= serverInfo->mem;
   mach64Screen->cpp		= serverInfo->cpp;

   mach64Screen->frontOffset	= serverInfo->frontOffset;
   mach64Screen->frontPitch	= serverInfo->frontPitch;
   mach64Screen->backOffset	= serverInfo->backOffset;
   mach64Screen->backPitch	= serverInfo->backPitch;
   mach64Screen->depthOffset	= serverInfo->depthOffset;
   mach64Screen->depthPitch	= serverInfo->depthPitch;

   mach64Screen->texOffset[MACH64_CARD_HEAP] = serverInfo->textureOffset;
   mach64Screen->texSize[MACH64_CARD_HEAP] = serverInfo->textureSize;
   mach64Screen->logTexGranularity[MACH64_CARD_HEAP] =
      serverInfo->logTextureGranularity;

   if ( mach64Screen->IsPCI ) {
      mach64Screen->numTexHeaps = MACH64_NR_TEX_HEAPS - 1;
      mach64Screen->firstTexHeap = MACH64_CARD_HEAP;
      mach64Screen->texOffset[MACH64_AGP_HEAP] = 0;
      mach64Screen->texSize[MACH64_AGP_HEAP] = 0;
      mach64Screen->logTexGranularity[MACH64_AGP_HEAP] = 0;
   } else {
      if (serverInfo->textureSize > 0) {
	 mach64Screen->numTexHeaps = MACH64_NR_TEX_HEAPS;
	 mach64Screen->firstTexHeap = MACH64_CARD_HEAP;
      } else {
	 mach64Screen->numTexHeaps = MACH64_NR_TEX_HEAPS - 1;
	 mach64Screen->firstTexHeap = MACH64_AGP_HEAP;
      }
      mach64Screen->texOffset[MACH64_AGP_HEAP] = serverInfo->agpTextureOffset;
      mach64Screen->texSize[MACH64_AGP_HEAP] = serverInfo->agpSize;
      mach64Screen->logTexGranularity[MACH64_AGP_HEAP] = serverInfo->logAgpTextureGranularity;
   }

   mach64Screen->driScreen = sPriv;

   i = 0;
   if ( mach64Screen->irq != 0 ) {
      mach64Screen->extensions[i++] = &driSwapControlExtension.base;
      mach64Screen->extensions[i++] = &driMediaStreamCounterExtension.base;
   }
   mach64Screen->extensions[i++] = NULL;
   sPriv->extensions = mach64Screen->extensions;

   return mach64Screen;
}

/* Destroy the device specific screen private data struct.
 */
static void
mach64DestroyScreen( __DRIscreen *driScreen )
{
   mach64ScreenRec *mach64Screen = (mach64ScreenRec *) driScreen->private;

   if ( !mach64Screen )
      return;

   if ( MACH64_DEBUG & DEBUG_VERBOSE_DRI ) 
      fprintf( stderr, "%s\n", __FUNCTION__ );

   if ( !mach64Screen->IsPCI ) {
      drmUnmap( (drmAddress)mach64Screen->agpTextures.map,
		mach64Screen->agpTextures.size );
   }

   drmUnmapBufs( mach64Screen->buffers );
   drmUnmap( (drmAddress)mach64Screen->mmio.map, mach64Screen->mmio.size );

   FREE( mach64Screen );
   driScreen->private = NULL;
}


/* Create and initialize the Mesa and driver specific pixmap buffer
 * data.
 */
static GLboolean
mach64CreateBuffer( __DRIscreen *driScrnPriv,
		    __DRIdrawable *driDrawPriv,
		    const struct gl_config *mesaVis,
		    GLboolean isPixmap )
{
   mach64ScreenPtr screen = (mach64ScreenPtr) driScrnPriv->private;

   if (isPixmap) {
      return GL_FALSE; /* not implemented */
   }
   else {
      struct gl_framebuffer *fb = _mesa_create_framebuffer(mesaVis);

      {
         driRenderbuffer *frontRb
            = driNewRenderbuffer(MESA_FORMAT_ARGB8888,
                                 NULL,
                                 screen->cpp,
                                 screen->frontOffset, screen->frontPitch,
                                 driDrawPriv);
         mach64SetSpanFunctions(frontRb, mesaVis);
         _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &frontRb->Base);
      }

      if (mesaVis->doubleBufferMode) {
         driRenderbuffer *backRb
            = driNewRenderbuffer(MESA_FORMAT_ARGB8888,
                                 NULL,
                                 screen->cpp,
                                 screen->backOffset, screen->backPitch,
                                 driDrawPriv);
         mach64SetSpanFunctions(backRb, mesaVis);
         _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &backRb->Base);
      }

      if (mesaVis->depthBits == 16) {
         driRenderbuffer *depthRb
            = driNewRenderbuffer(MESA_FORMAT_Z16,
                                 NULL, screen->cpp,
                                 screen->depthOffset, screen->depthPitch,
                                 driDrawPriv);
         mach64SetSpanFunctions(depthRb, mesaVis);
         _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
      }
      else if (mesaVis->depthBits == 24) {
         /* XXX I don't think 24-bit Z is supported - so this isn't used */
         driRenderbuffer *depthRb
            = driNewRenderbuffer(MESA_FORMAT_Z24_S8,
                                 NULL,
                                 screen->cpp,
                                 screen->depthOffset, screen->depthPitch,
                                 driDrawPriv);
         mach64SetSpanFunctions(depthRb, mesaVis);
         _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
      }

      _mesa_add_soft_renderbuffers(fb,
                                   GL_FALSE, /* color */
                                   GL_FALSE, /* depth */
                                   mesaVis->stencilBits > 0,
                                   mesaVis->accumRedBits > 0,
                                   GL_FALSE, /* alpha */
                                   GL_FALSE /* aux */);
      driDrawPriv->driverPrivate = (void *) fb;

      return (driDrawPriv->driverPrivate != NULL);
   }
}


static void
mach64DestroyBuffer(__DRIdrawable *driDrawPriv)
{
   _mesa_reference_framebuffer((GLframebuffer **)(&(driDrawPriv->driverPrivate)), NULL);
}


/* Copy the back color buffer to the front color buffer */
static void
mach64SwapBuffers(__DRIdrawable *dPriv)
{
   if (dPriv->driContextPriv && dPriv->driContextPriv->driverPrivate) {
      mach64ContextPtr mmesa;
      GLcontext *ctx;
      mmesa = (mach64ContextPtr) dPriv->driContextPriv->driverPrivate;
      ctx = mmesa->glCtx;
      if (ctx->Visual.doubleBufferMode) {
         _mesa_notifySwapBuffers( ctx );  /* flush pending rendering comands */
         mach64CopyBuffer( dPriv );
      }
   }
   else {
      /* XXX this shouldn't be an error but we can't handle it for now */
      _mesa_problem(NULL, "%s: drawable has no context!", __FUNCTION__);
   }
}


/* Initialize the driver specific screen private data.
 */
static GLboolean
mach64InitDriver( __DRIscreen *driScreen )
{
   driScreen->private = (void *) mach64CreateScreen( driScreen );

   if ( !driScreen->private ) {
      mach64DestroyScreen( driScreen );
      return GL_FALSE;
   }

   return GL_TRUE;
}

/**
 * This is the driver specific part of the createNewScreen entry point.
 * 
 * \todo maybe fold this into intelInitDriver
 *
 * \return the struct gl_config supported by this driver
 */
static const __DRIconfig **
mach64InitScreen(__DRIscreen *psp)
{
   static const __DRIversion ddx_expected = { 6, 4, 0 };
   static const __DRIversion dri_expected = { 4, 0, 0 };
   static const __DRIversion drm_expected = { 2, 0, 0 };
   ATIDRIPtr dri_priv = (ATIDRIPtr) psp->pDevPriv;

   if ( ! driCheckDriDdxDrmVersions2( "Mach64",
				      &psp->dri_version, & dri_expected,
				      &psp->ddx_version, & ddx_expected,
				      &psp->drm_version, & drm_expected ) ) {
      return NULL;
   }
   
   if (!mach64InitDriver(psp))
      return NULL;

   return  mach64FillInModes( psp, dri_priv->cpp * 8, 16, 0, 1);
}

const struct __DriverAPIRec driDriverAPI = {
   .InitScreen      = mach64InitScreen,
   .DestroyScreen   = mach64DestroyScreen,
   .CreateContext   = mach64CreateContext,
   .DestroyContext  = mach64DestroyContext,
   .CreateBuffer    = mach64CreateBuffer,
   .DestroyBuffer   = mach64DestroyBuffer,
   .SwapBuffers     = mach64SwapBuffers,
   .MakeCurrent     = mach64MakeCurrent,
   .UnbindContext   = mach64UnbindContext,
   .GetSwapInfo     = NULL,
   .GetDrawableMSC  = driDrawableGetMSC32,
   .WaitForMSC      = driWaitForMSC32,
   .WaitForSBC      = NULL,
   .SwapBuffersMSC  = NULL
};

/* This is the table of extensions that the loader will dlsym() for. */
PUBLIC const __DRIextension *__driDriverExtensions[] = {
    &driCoreExtension.base,
    &driLegacyExtension.base,
    NULL
};