text: /**************************************************************************
  
  Copyright 2000, 2001 ATI Technologies Inc., Ontario, Canada, and
                       VA Linux Systems Inc., Fremont, California.
  
  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 THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS 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.
  
  **************************************************************************/
  
  /**
   * \file radeon_screen.c
   * Screen initialization functions for the Radeon driver.
   *
   * \author Kevin E. Martin <martin@valinux.com>
   * \author  Gareth Hughes <gareth@valinux.com>
   */
  
  #include <errno.h>
  #include "main/glheader.h"
  #include "main/imports.h"
  #include "main/mtypes.h"
  #include "main/framebuffer.h"
  #include "main/renderbuffer.h"
  #include "main/fbobject.h"
  #include "swrast/s_renderbuffer.h"
  
  #include "radeon_chipset.h"
  #include "radeon_screen.h"
  #include "radeon_common.h"
  #include "radeon_common_context.h"
  #if defined(RADEON_R100)
  #include "radeon_context.h"
  #include "radeon_tex.h"
  #elif defined(RADEON_R200)
  #include "r200_context.h"
  #include "r200_tex.h"
  #endif
  
  #include "utils.h"
  
  #include "GL/internal/dri_interface.h"
  
  /* Radeon configuration
   */
  #include "util/xmlpool.h"
  
  #define DRI_CONF_COMMAND_BUFFER_SIZE(def,min,max) \
  DRI_CONF_OPT_BEGIN_V(command_buffer_size,int,def, # min ":" # max ) \
          DRI_CONF_DESC(en,"Size of command buffer (in KB)") \
          DRI_CONF_DESC(de,"Grösse des Befehlspuffers (in KB)") \
  DRI_CONF_OPT_END
  
  #define DRI_CONF_MAX_TEXTURE_UNITS(def,min,max) \
  DRI_CONF_OPT_BEGIN_V(texture_units,int,def, # min ":" # max ) \
          DRI_CONF_DESC(en,"Number of texture units used") \
  DRI_CONF_OPT_END
  
  #define DRI_CONF_HYPERZ(def) \
  DRI_CONF_OPT_BEGIN_B(hyperz, def) \
          DRI_CONF_DESC(en,"Use HyperZ to boost performance") \
  DRI_CONF_OPT_END
  
  #define DRI_CONF_TCL_MODE(def) \
  DRI_CONF_OPT_BEGIN_V(tcl_mode,enum,def,"0:3") \
          DRI_CONF_DESC_BEGIN(en,"TCL mode (Transformation, Clipping, Lighting)") \
                  DRI_CONF_ENUM(0,"Use software TCL pipeline") \
                  DRI_CONF_ENUM(1,"Use hardware TCL as first TCL pipeline stage") \
                  DRI_CONF_ENUM(2,"Bypass the TCL pipeline") \
                  DRI_CONF_ENUM(3,"Bypass the TCL pipeline with state-based machine code generated on-the-fly") \
          DRI_CONF_DESC_END \
  DRI_CONF_OPT_END
  
  #define DRI_CONF_NO_NEG_LOD_BIAS(def) \
  DRI_CONF_OPT_BEGIN_B(no_neg_lod_bias, def) \
          DRI_CONF_DESC(en,"Forbid negative texture LOD bias") \
  DRI_CONF_OPT_END
  
  #define DRI_CONF_DEF_MAX_ANISOTROPY(def,range) \
  DRI_CONF_OPT_BEGIN_V(def_max_anisotropy,float,def,range) \
          DRI_CONF_DESC(en,"Initial maximum value for anisotropic texture filtering") \
  DRI_CONF_OPT_END
  
  #if defined(RADEON_R100)	/* R100 */
  static const __DRIconfigOptionsExtension radeon_config_options = {
     .base = { __DRI_CONFIG_OPTIONS, 1 },
     .xml =
  DRI_CONF_BEGIN
      DRI_CONF_SECTION_PERFORMANCE
          DRI_CONF_TCL_MODE(DRI_CONF_TCL_CODEGEN)
          DRI_CONF_FTHROTTLE_MODE(DRI_CONF_FTHROTTLE_IRQS)
          DRI_CONF_MAX_TEXTURE_UNITS(3,2,3)
          DRI_CONF_HYPERZ("false")
          DRI_CONF_COMMAND_BUFFER_SIZE(8, 8, 32)
      DRI_CONF_SECTION_END
      DRI_CONF_SECTION_QUALITY
          DRI_CONF_TEXTURE_DEPTH(DRI_CONF_TEXTURE_DEPTH_FB)
          DRI_CONF_DEF_MAX_ANISOTROPY(1.0,"1.0,2.0,4.0,8.0,16.0")
          DRI_CONF_NO_NEG_LOD_BIAS("false")
          DRI_CONF_COLOR_REDUCTION(DRI_CONF_COLOR_REDUCTION_DITHER)
          DRI_CONF_ROUND_MODE(DRI_CONF_ROUND_TRUNC)
          DRI_CONF_DITHER_MODE(DRI_CONF_DITHER_XERRORDIFF)
      DRI_CONF_SECTION_END
  DRI_CONF_END
  };
  
  #elif defined(RADEON_R200)
  
  #define DRI_CONF_TEXTURE_BLEND_QUALITY(def,range) \
  DRI_CONF_OPT_BEGIN_V(texture_blend_quality,float,def,range) \
         DRI_CONF_DESC(en,"Texture filtering quality vs. speed, AKA “brilinear” texture filtering") \
  DRI_CONF_OPT_END
  
  static const __DRIconfigOptionsExtension radeon_config_options = {
     .base = { __DRI_CONFIG_OPTIONS, 1 },
     .xml =
  DRI_CONF_BEGIN
      DRI_CONF_SECTION_PERFORMANCE
          DRI_CONF_TCL_MODE(DRI_CONF_TCL_CODEGEN)
          DRI_CONF_FTHROTTLE_MODE(DRI_CONF_FTHROTTLE_IRQS)
          DRI_CONF_MAX_TEXTURE_UNITS(6,2,6)
          DRI_CONF_HYPERZ("false")
          DRI_CONF_COMMAND_BUFFER_SIZE(8, 8, 32)
      DRI_CONF_SECTION_END
      DRI_CONF_SECTION_QUALITY
          DRI_CONF_TEXTURE_DEPTH(DRI_CONF_TEXTURE_DEPTH_FB)
          DRI_CONF_DEF_MAX_ANISOTROPY(1.0,"1.0,2.0,4.0,8.0,16.0")
          DRI_CONF_NO_NEG_LOD_BIAS("false")
          DRI_CONF_COLOR_REDUCTION(DRI_CONF_COLOR_REDUCTION_DITHER)
          DRI_CONF_ROUND_MODE(DRI_CONF_ROUND_TRUNC)
          DRI_CONF_DITHER_MODE(DRI_CONF_DITHER_XERRORDIFF)
          DRI_CONF_TEXTURE_BLEND_QUALITY(1.0,"0.0:1.0")
      DRI_CONF_SECTION_END
  DRI_CONF_END
  };
  #endif
  
  static int
  radeonGetParam(__DRIscreen *sPriv, int param, void *value)
  {
    struct drm_radeon_info info = { 0 };
  
    info.value = (uint64_t)(uintptr_t)value;
    switch (param) {
    case RADEON_PARAM_DEVICE_ID:
      info.request = RADEON_INFO_DEVICE_ID;
      break;
    case RADEON_PARAM_NUM_GB_PIPES:
      info.request = RADEON_INFO_NUM_GB_PIPES;
      break;
    case RADEON_PARAM_NUM_Z_PIPES:
      info.request = RADEON_INFO_NUM_Z_PIPES;
      break;
    case RADEON_INFO_TILING_CONFIG:
      info.request = RADEON_INFO_TILING_CONFIG;
      break;
    default:
      return -EINVAL;
    }
    return drmCommandWriteRead(sPriv->fd, DRM_RADEON_INFO, &info, sizeof(info));
  }
  
  #if defined(RADEON_R100)
  static const __DRItexBufferExtension radeonTexBufferExtension = {
     .base = { __DRI_TEX_BUFFER, 3 },
  
     .setTexBuffer        = radeonSetTexBuffer,
     .setTexBuffer2       = radeonSetTexBuffer2,
     .releaseTexBuffer    = NULL,
  };
  #elif defined(RADEON_R200)
  static const __DRItexBufferExtension r200TexBufferExtension = {
     .base = { __DRI_TEX_BUFFER, 3 },
  
     .setTexBuffer        = r200SetTexBuffer,
     .setTexBuffer2       = r200SetTexBuffer2,
     .releaseTexBuffer    = NULL,
  };
  #endif
  
  static void
  radeonDRI2Flush(__DRIdrawable *drawable)
  {
      radeonContextPtr rmesa;
  
      rmesa = (radeonContextPtr) drawable->driContextPriv->driverPrivate;
      radeonFlush(&rmesa->glCtx);
  }
  
  static const struct __DRI2flushExtensionRec radeonFlushExtension = {
     .base = { __DRI2_FLUSH, 3 },
  
     .flush               = radeonDRI2Flush,
     .invalidate          = dri2InvalidateDrawable,
  };
  
  static __DRIimage *
  radeon_create_image_from_name(__DRIscreen *screen,
                                int width, int height, int format,
                                int name, int pitch, void *loaderPrivate)
  {
     __DRIimage *image;
     radeonScreenPtr radeonScreen = screen->driverPrivate;
  
     if (name == 0)
        return NULL;
  
     image = calloc(1, sizeof *image);
     if (image == NULL)
        return NULL;
  
     switch (format) {
     case __DRI_IMAGE_FORMAT_RGB565:
        image->format = MESA_FORMAT_B5G6R5_UNORM;
        image->internal_format = GL_RGB;
        image->data_type = GL_UNSIGNED_BYTE;
        break;
     case __DRI_IMAGE_FORMAT_XRGB8888:
        image->format = MESA_FORMAT_B8G8R8X8_UNORM;
        image->internal_format = GL_RGB;
        image->data_type = GL_UNSIGNED_BYTE;
        break;
     case __DRI_IMAGE_FORMAT_ARGB8888:
        image->format = MESA_FORMAT_B8G8R8A8_UNORM;
        image->internal_format = GL_RGBA;
        image->data_type = GL_UNSIGNED_BYTE;
        break;
     default:
        free(image);
        return NULL;
     }
  
     image->data = loaderPrivate;
     image->cpp = _mesa_get_format_bytes(image->format);
     image->width = width;
     image->pitch = pitch;
     image->height = height;
  
     image->bo = radeon_bo_open(radeonScreen->bom,
                                (uint32_t)name,
                                image->pitch * image->height * image->cpp,
                                0,
                                RADEON_GEM_DOMAIN_VRAM,
                                0);
  
     if (image->bo == NULL) {
        free(image);
        return NULL;
     }
  
     return image;
  }
  
  static __DRIimage *
  radeon_create_image_from_renderbuffer(__DRIcontext *context,
                                        int renderbuffer, void *loaderPrivate)
  {
     __DRIimage *image;
     radeonContextPtr radeon = context->driverPrivate;
     struct gl_renderbuffer *rb;
     struct radeon_renderbuffer *rrb;
  
     rb = _mesa_lookup_renderbuffer(&radeon->glCtx, renderbuffer);
     if (!rb) {
        _mesa_error(&radeon->glCtx,
                    GL_INVALID_OPERATION, "glRenderbufferExternalMESA");
        return NULL;
     }
  
     rrb = radeon_renderbuffer(rb);
     image = calloc(1, sizeof *image);
     if (image == NULL)
        return NULL;
  
     image->internal_format = rb->InternalFormat;
     image->format = rb->Format;
     image->cpp = rrb->cpp;
     image->data_type = GL_UNSIGNED_BYTE;
     image->data = loaderPrivate;
     radeon_bo_ref(rrb->bo);
     image->bo = rrb->bo;
  
     image->width = rb->Width;
     image->height = rb->Height;
     image->pitch = rrb->pitch / image->cpp;
  
     return image;
  }
  
  static void
  radeon_destroy_image(__DRIimage *image)
  {
     radeon_bo_unref(image->bo);
     free(image);
  }
  
  static __DRIimage *
  radeon_create_image(__DRIscreen *screen,
                      int width, int height, int format,
                      unsigned int use,
                      void *loaderPrivate)
  {
     __DRIimage *image;
     radeonScreenPtr radeonScreen = screen->driverPrivate;
  
     image = calloc(1, sizeof *image);
     if (image == NULL)
        return NULL;
  
     image->dri_format = format;
  
     switch (format) {
     case __DRI_IMAGE_FORMAT_RGB565:
        image->format = MESA_FORMAT_B5G6R5_UNORM;
        image->internal_format = GL_RGB;
        image->data_type = GL_UNSIGNED_BYTE;
        break;
     case __DRI_IMAGE_FORMAT_XRGB8888:
        image->format = MESA_FORMAT_B8G8R8X8_UNORM;
        image->internal_format = GL_RGB;
        image->data_type = GL_UNSIGNED_BYTE;
        break;
     case __DRI_IMAGE_FORMAT_ARGB8888:
        image->format = MESA_FORMAT_B8G8R8A8_UNORM;
        image->internal_format = GL_RGBA;
        image->data_type = GL_UNSIGNED_BYTE;
        break;
     default:
        free(image);
        return NULL;
     }
  
     image->data = loaderPrivate;
     image->cpp = _mesa_get_format_bytes(image->format);
     image->width = width;
     image->height = height;
     image->pitch = ((image->cpp * image->width + 255) & ~255) / image->cpp;
  
     image->bo = radeon_bo_open(radeonScreen->bom,
                                0,
                                image->pitch * image->height * image->cpp,
                                0,
                                RADEON_GEM_DOMAIN_VRAM,
                                0);
  
     if (image->bo == NULL) {
        free(image);
        return NULL;
     }
  
     return image;
  }
  
  static GLboolean
  radeon_query_image(__DRIimage *image, int attrib, int *value)
  {
     switch (attrib) {
     case __DRI_IMAGE_ATTRIB_STRIDE:
        *value = image->pitch * image->cpp;
        return GL_TRUE;
     case __DRI_IMAGE_ATTRIB_HANDLE:
        *value = image->bo->handle;
        return GL_TRUE;
     case __DRI_IMAGE_ATTRIB_NAME:
        radeon_gem_get_kernel_name(image->bo, (uint32_t *) value);
        return GL_TRUE;
     default:
        return GL_FALSE;
     }
  }
  
  static const __DRIimageExtension radeonImageExtension = {
     .base = { __DRI_IMAGE, 1 },
  
     .createImageFromName         = radeon_create_image_from_name,
     .createImageFromRenderbuffer = radeon_create_image_from_renderbuffer,
     .destroyImage                = radeon_destroy_image,
     .createImage                 = radeon_create_image,
     .queryImage                  = radeon_query_image
  };
  
  static int radeon_set_screen_flags(radeonScreenPtr screen, int device_id)
  {
     screen->device_id = device_id;
     screen->chip_flags = 0;
     switch ( device_id ) {
  #if defined(RADEON_R100)
     case PCI_CHIP_RN50_515E:
     case PCI_CHIP_RN50_5969:
  	return -1;
  
     case PCI_CHIP_RADEON_LY:
     case PCI_CHIP_RADEON_LZ:
     case PCI_CHIP_RADEON_QY:
     case PCI_CHIP_RADEON_QZ:
        screen->chip_family = CHIP_FAMILY_RV100;
        break;
  
     case PCI_CHIP_RS100_4136:
     case PCI_CHIP_RS100_4336:
        screen->chip_family = CHIP_FAMILY_RS100;
        break;
  
     case PCI_CHIP_RS200_4137:
     case PCI_CHIP_RS200_4337:
     case PCI_CHIP_RS250_4237:
     case PCI_CHIP_RS250_4437:
        screen->chip_family = CHIP_FAMILY_RS200;
        break;
  
     case PCI_CHIP_RADEON_QD:
     case PCI_CHIP_RADEON_QE:
     case PCI_CHIP_RADEON_QF:
     case PCI_CHIP_RADEON_QG:
        /* all original radeons (7200) presumably have a stencil op bug */
        screen->chip_family = CHIP_FAMILY_R100;
        screen->chip_flags = RADEON_CHIPSET_TCL | RADEON_CHIPSET_BROKEN_STENCIL | RADEON_CHIPSET_DEPTH_ALWAYS_TILED;
        break;
  
     case PCI_CHIP_RV200_QW:
     case PCI_CHIP_RV200_QX:
     case PCI_CHIP_RADEON_LW:
     case PCI_CHIP_RADEON_LX:
        screen->chip_family = CHIP_FAMILY_RV200;
        screen->chip_flags = RADEON_CHIPSET_TCL | RADEON_CHIPSET_DEPTH_ALWAYS_TILED;
        break;
  
  #elif defined(RADEON_R200)
     case PCI_CHIP_R200_BB:
     case PCI_CHIP_R200_QH:
     case PCI_CHIP_R200_QL:
     case PCI_CHIP_R200_QM:
        screen->chip_family = CHIP_FAMILY_R200;
        screen->chip_flags = RADEON_CHIPSET_TCL | RADEON_CHIPSET_DEPTH_ALWAYS_TILED;
        break;
  
     case PCI_CHIP_RV250_If:
     case PCI_CHIP_RV250_Ig:
     case PCI_CHIP_RV250_Ld:
     case PCI_CHIP_RV250_Lf:
     case PCI_CHIP_RV250_Lg:
        screen->chip_family = CHIP_FAMILY_RV250;
        screen->chip_flags = R200_CHIPSET_YCBCR_BROKEN | RADEON_CHIPSET_TCL | RADEON_CHIPSET_DEPTH_ALWAYS_TILED;
        break;
  
     case PCI_CHIP_RV280_4C6E:
     case PCI_CHIP_RV280_5960:
     case PCI_CHIP_RV280_5961:
     case PCI_CHIP_RV280_5962:
     case PCI_CHIP_RV280_5964:
     case PCI_CHIP_RV280_5965:
     case PCI_CHIP_RV280_5C61:
     case PCI_CHIP_RV280_5C63:
        screen->chip_family = CHIP_FAMILY_RV280;
        screen->chip_flags = RADEON_CHIPSET_TCL | RADEON_CHIPSET_DEPTH_ALWAYS_TILED;
        break;
  
     case PCI_CHIP_RS300_5834:
     case PCI_CHIP_RS300_5835:
     case PCI_CHIP_RS350_7834:
     case PCI_CHIP_RS350_7835:
        screen->chip_family = CHIP_FAMILY_RS300;
        screen->chip_flags = RADEON_CHIPSET_DEPTH_ALWAYS_TILED;
        break;
  #endif
  
     default:
        fprintf(stderr, "unknown chip id 0x%x, can't guess.\n",
  	      device_id);
        return -1;
     }
  
     return 0;
  }
  
  static int
  radeonQueryRendererInteger(__DRIscreen *psp, int param,
  			       unsigned int *value)
  {
     radeonScreenPtr screen = (radeonScreenPtr)psp->driverPrivate;
  
     switch (param) {
     case __DRI2_RENDERER_VENDOR_ID:
        value[0] = 0x1002;
        return 0;
     case __DRI2_RENDERER_DEVICE_ID:
        value[0] = screen->device_id;
        return 0;
     case __DRI2_RENDERER_ACCELERATED:
        value[0] = 1;
        return 0;
     case __DRI2_RENDERER_VIDEO_MEMORY: {
        struct drm_radeon_gem_info gem_info;
        int retval;
        memset(&gem_info, 0, sizeof(gem_info));
  
        /* Get GEM info. */
        retval = drmCommandWriteRead(psp->fd, DRM_RADEON_GEM_INFO, &gem_info,
  				   sizeof(gem_info));
  
        if (retval) {
           fprintf(stderr, "radeon: Failed to get MM info, error number %d\n",
                  retval);
           return -1;
  
        }
        /* XXX: Do we want to return vram_size or vram_visible ? */
        value[0] = gem_info.vram_size >> 20;
        return 0;
     }
     case __DRI2_RENDERER_UNIFIED_MEMORY_ARCHITECTURE:
        value[0] = 0;
        return 0;
     default:
        return driQueryRendererIntegerCommon(psp, param, value);
     }
  }
  
  static int
  radeonQueryRendererString(__DRIscreen *psp, int param, const char **value)
  {
     radeonScreenPtr screen = (radeonScreenPtr)psp->driverPrivate;
  
     switch (param) {
     case __DRI2_RENDERER_VENDOR_ID:
        value[0] = radeonVendorString;
        return 0;
     case __DRI2_RENDERER_DEVICE_ID:
        value[0] = radeonGetRendererString(screen);
        return 0;
     default:
        return -1;
     }
  }
  
  static const __DRI2rendererQueryExtension radeonRendererQueryExtension = {
     .base = { __DRI2_RENDERER_QUERY, 1 },
  
     .queryInteger        = radeonQueryRendererInteger,
     .queryString         = radeonQueryRendererString
  };
  
  
  static const __DRIextension *radeon_screen_extensions[] = {
      &dri2ConfigQueryExtension.base,
  #if defined(RADEON_R100)
      &radeonTexBufferExtension.base,
  #elif defined(RADEON_R200)
      &r200TexBufferExtension.base,
  #endif
      &radeonFlushExtension.base,
      &radeonImageExtension.base,
      &radeonRendererQueryExtension.base,
      &dri2NoErrorExtension.base,
      NULL
  };
  
  static radeonScreenPtr
  radeonCreateScreen2(__DRIscreen *sPriv)
  {
     radeonScreenPtr screen;
     int ret;
     uint32_t device_id = 0;
  
     /* Allocate the private area */
     screen = calloc(1, sizeof(*screen));
     if ( !screen ) {
        fprintf(stderr, "%s: Could not allocate memory for screen structure", __func__);
        fprintf(stderr, "leaving here\n");
        return NULL;
     }
  
     radeon_init_debug();
  
     /* parse information in __driConfigOptions */
     driParseOptionInfo (&screen->optionCache, radeon_config_options.xml);
  
     screen->chip_flags = 0;
  
     screen->irq = 1;
  
     ret = radeonGetParam(sPriv, RADEON_PARAM_DEVICE_ID, &device_id);
     if (ret) {
       free( screen );
       fprintf(stderr, "drm_radeon_getparam_t (RADEON_PARAM_DEVICE_ID): %d\n", ret);
       return NULL;
     }
  
     ret = radeon_set_screen_flags(screen, device_id);
     if (ret == -1) {
       free(screen);
       return NULL;
     }
  
     if (getenv("RADEON_NO_TCL"))
  	   screen->chip_flags &= ~RADEON_CHIPSET_TCL;
  
     sPriv->extensions = radeon_screen_extensions;
  
     screen->driScreen = sPriv;
     screen->bom = radeon_bo_manager_gem_ctor(sPriv->fd);
     if (screen->bom == NULL) {
         free(screen);
         return NULL;
     }
     return screen;
  }
  
  /* Destroy the device specific screen private data struct.
   */
  static void
  radeonDestroyScreen( __DRIscreen *sPriv )
  {
      radeonScreenPtr screen = (radeonScreenPtr)sPriv->driverPrivate;
  
      if (!screen)
          return;
  
  #ifdef RADEON_BO_TRACK
      radeon_tracker_print(&screen->bom->tracker, stderr);
  #endif
      radeon_bo_manager_gem_dtor(screen->bom);
  
      /* free all option information */
      driDestroyOptionInfo (&screen->optionCache);
  
      free( screen );
      sPriv->driverPrivate = NULL;
  }
  
  
  /* Initialize the driver specific screen private data.
   */
  static GLboolean
  radeonInitDriver( __DRIscreen *sPriv )
  {
      sPriv->driverPrivate = (void *) radeonCreateScreen2( sPriv );
      if ( !sPriv->driverPrivate ) {
          radeonDestroyScreen( sPriv );
          return GL_FALSE;
      }
  
      return GL_TRUE;
  }
  
  
  
  /**
   * Create the Mesa framebuffer and renderbuffers for a given window/drawable.
   *
   * \todo This function (and its interface) will need to be updated to support
   * pbuffers.
   */
  static GLboolean
  radeonCreateBuffer( __DRIscreen *driScrnPriv,
                      __DRIdrawable *driDrawPriv,
                      const struct gl_config *mesaVis,
                      GLboolean isPixmap )
  {
      radeonScreenPtr screen = (radeonScreenPtr) driScrnPriv->driverPrivate;
  
      const GLboolean swDepth = GL_FALSE;
      const GLboolean swAlpha = GL_FALSE;
      const GLboolean swAccum = mesaVis->accumRedBits > 0;
      const GLboolean swStencil = mesaVis->stencilBits > 0 &&
  	mesaVis->depthBits != 24;
      mesa_format rgbFormat;
      struct radeon_framebuffer *rfb;
  
      if (isPixmap)
        return GL_FALSE; /* not implemented */
  
      rfb = CALLOC_STRUCT(radeon_framebuffer);
      if (!rfb)
        return GL_FALSE;
  
      _mesa_initialize_window_framebuffer(&rfb->base, mesaVis);
  
      if (mesaVis->redBits == 5)
          rgbFormat =
  #if UTIL_ARCH_LITTLE_ENDIAN
             MESA_FORMAT_B5G6R5_UNORM;
  #else
             MESA_FORMAT_R5G6B5_UNORM;
  #endif
      else if (mesaVis->alphaBits == 0)
          rgbFormat =
  #if UTIL_ARCH_LITTLE_ENDIAN
             MESA_FORMAT_B8G8R8X8_UNORM;
  #else
             MESA_FORMAT_X8R8G8B8_UNORM;
  #endif
      else
          rgbFormat = 
  #if UTIL_ARCH_LITTLE_ENDIAN
             MESA_FORMAT_B8G8R8A8_UNORM;
  #else
             MESA_FORMAT_A8R8G8B8_UNORM;
  #endif
  
      /* front color renderbuffer */
      rfb->color_rb[0] = radeon_create_renderbuffer(rgbFormat, driDrawPriv);
      _mesa_attach_and_own_rb(&rfb->base, BUFFER_FRONT_LEFT, &rfb->color_rb[0]->base.Base);
      rfb->color_rb[0]->has_surface = 1;
  
      /* back color renderbuffer */
      if (mesaVis->doubleBufferMode) {
        rfb->color_rb[1] = radeon_create_renderbuffer(rgbFormat, driDrawPriv);
  	_mesa_attach_and_own_rb(&rfb->base, BUFFER_BACK_LEFT, &rfb->color_rb[1]->base.Base);
  	rfb->color_rb[1]->has_surface = 1;
      }
  
      if (mesaVis->depthBits == 24) {
        if (mesaVis->stencilBits == 8) {
  	struct radeon_renderbuffer *depthStencilRb =
             radeon_create_renderbuffer(MESA_FORMAT_Z24_UNORM_S8_UINT, driDrawPriv);
  	_mesa_attach_and_own_rb(&rfb->base, BUFFER_DEPTH, &depthStencilRb->base.Base);
  	_mesa_attach_and_reference_rb(&rfb->base, BUFFER_STENCIL, &depthStencilRb->base.Base);
  	depthStencilRb->has_surface = screen->depthHasSurface;
        } else {
  	/* depth renderbuffer */
  	struct radeon_renderbuffer *depth =
             radeon_create_renderbuffer(MESA_FORMAT_Z24_UNORM_X8_UINT, driDrawPriv);
  	_mesa_attach_and_own_rb(&rfb->base, BUFFER_DEPTH, &depth->base.Base);
  	depth->has_surface = screen->depthHasSurface;
        }
      } else if (mesaVis->depthBits == 16) {
          /* just 16-bit depth buffer, no hw stencil */
  	struct radeon_renderbuffer *depth =
             radeon_create_renderbuffer(MESA_FORMAT_Z_UNORM16, driDrawPriv);
  	_mesa_attach_and_own_rb(&rfb->base, BUFFER_DEPTH, &depth->base.Base);
  	depth->has_surface = screen->depthHasSurface;
      }
  
      _swrast_add_soft_renderbuffers(&rfb->base,
  	    GL_FALSE, /* color */
  	    swDepth,
  	    swStencil,
  	    swAccum,
  	    swAlpha,
  	    GL_FALSE /* aux */);
      driDrawPriv->driverPrivate = (void *) rfb;
  
      return (driDrawPriv->driverPrivate != NULL);
  }
  
  
  static void radeon_cleanup_renderbuffers(struct radeon_framebuffer *rfb)
  {
  	struct radeon_renderbuffer *rb;
  
  	rb = rfb->color_rb[0];
  	if (rb && rb->bo) {
  		radeon_bo_unref(rb->bo);
  		rb->bo = NULL;
  	}
  	rb = rfb->color_rb[1];
  	if (rb && rb->bo) {
  		radeon_bo_unref(rb->bo);
  		rb->bo = NULL;
  	}
  	rb = radeon_get_renderbuffer(&rfb->base, BUFFER_DEPTH);
  	if (rb && rb->bo) {
  		radeon_bo_unref(rb->bo);
  		rb->bo = NULL;
  	}
  }
  
  void
  radeonDestroyBuffer(__DRIdrawable *driDrawPriv)
  {
      struct radeon_framebuffer *rfb;
      if (!driDrawPriv)
  	return;
  
      rfb = (void*)driDrawPriv->driverPrivate;
      if (!rfb)
  	return;
      radeon_cleanup_renderbuffers(rfb);
      _mesa_reference_framebuffer((struct gl_framebuffer **)(&(driDrawPriv->driverPrivate)), NULL);
  }
  
  /**
   * This is the driver specific part of the createNewScreen entry point.
   * Called when using DRI2.
   *
   * \return the struct gl_config supported by this driver
   */
  static const
  __DRIconfig **radeonInitScreen2(__DRIscreen *psp)
  {
     static const mesa_format formats[3] = {
        MESA_FORMAT_B5G6R5_UNORM,
        MESA_FORMAT_B8G8R8X8_UNORM,
        MESA_FORMAT_B8G8R8A8_UNORM
     };
  
     static const GLenum back_buffer_modes[] = {
        __DRI_ATTRIB_SWAP_NONE, __DRI_ATTRIB_SWAP_UNDEFINED
     };
     uint8_t depth_bits[4], stencil_bits[4], msaa_samples_array[1];
     int color;
     __DRIconfig **configs = NULL;
  
     psp->max_gl_compat_version = 13;
     psp->max_gl_es1_version = 11;
  
     if (!radeonInitDriver(psp)) {
         return NULL;
      }
     depth_bits[0] = 0;
     stencil_bits[0] = 0;
     depth_bits[1] = 16;
     stencil_bits[1] = 0;
     depth_bits[2] = 24;
     stencil_bits[2] = 0;
     depth_bits[3] = 24;
     stencil_bits[3] = 8;
  
     msaa_samples_array[0] = 0;
  
     for (color = 0; color < ARRAY_SIZE(formats); color++) {
        __DRIconfig **new_configs;
  
        new_configs = driCreateConfigs(formats[color],
  				     depth_bits,
  				     stencil_bits,
  				     ARRAY_SIZE(depth_bits),
  				     back_buffer_modes,
  				     ARRAY_SIZE(back_buffer_modes),
  				     msaa_samples_array,
  				     ARRAY_SIZE(msaa_samples_array),
  				     GL_TRUE, GL_FALSE, GL_FALSE);
        configs = driConcatConfigs(configs, new_configs);
     }
  
     if (configs == NULL) {
        fprintf(stderr, "[%s:%u] Error creating FBConfig!\n", __func__,
                __LINE__);
        return NULL;
     }
  
     return (const __DRIconfig **)configs;
  }
  
  static const struct __DriverAPIRec radeon_driver_api = {
     .InitScreen      = radeonInitScreen2,
     .DestroyScreen   = radeonDestroyScreen,
  #if defined(RADEON_R200)
     .CreateContext   = r200CreateContext,
     .DestroyContext  = r200DestroyContext,
  #else
     .CreateContext   = r100CreateContext,
     .DestroyContext  = radeonDestroyContext,
  #endif
     .CreateBuffer    = radeonCreateBuffer,
     .DestroyBuffer   = radeonDestroyBuffer,
     .MakeCurrent     = radeonMakeCurrent,
     .UnbindContext   = radeonUnbindContext,
  };
  
  static const struct __DRIDriverVtableExtensionRec radeon_vtable = {
     .base = { __DRI_DRIVER_VTABLE, 1 },
     .vtable = &radeon_driver_api,
  };
  
  /* This is the table of extensions that the loader will dlsym() for. */
  static const __DRIextension *radeon_driver_extensions[] = {
      &driCoreExtension.base,
      &driDRI2Extension.base,
      &radeon_config_options.base,
      &radeon_vtable.base,
      NULL
  };
  
  #ifdef RADEON_R200
  PUBLIC const __DRIextension **__driDriverGetExtensions_r200(void)
  {
     globalDriverAPI = &radeon_driver_api;
  
     return radeon_driver_extensions;
  }
  #else
  PUBLIC const __DRIextension **__driDriverGetExtensions_radeon(void)
  {
     globalDriverAPI = &radeon_driver_api;
  
     return radeon_driver_extensions;
  }
  #endif
  