mga_xmesa.c

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

/* $XFree86: xc/lib/GL/mesa/src/drv/mga/mga_xmesa.c,v 1.19 2003/03/26 20:43:49 tsi Exp $ */
/*
 * Copyright 2000-2001 VA Linux Systems, Inc.
 * 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
 * on the rights to use, copy, modify, merge, publish, distribute, sub
 * license, 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 NON-INFRINGEMENT.  IN NO EVENT SHALL
 * VA LINUX SYSTEMS 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 mga_xmesa.c
 * MGA screen and context initialization / creation code.
 *
 * \author Keith Whitwell <[e-mail]>
 */

#include <stdlib.h>
#include <stdint.h>
#include "drm.h"
#include "mga_drm.h"
#include "mga_xmesa.h"
#include "context.h"
#include "matrix.h"
#include "simple_list.h"
#include "imports.h"
#include "framebuffer.h"
#include "renderbuffer.h"

#include "swrast/swrast.h"
#include "swrast_setup/swrast_setup.h"
#include "tnl/tnl.h"
#include "vbo/vbo.h"

#include "tnl/t_pipeline.h"

#include "drivers/common/driverfuncs.h"

#include "mgadd.h"
#include "mgastate.h"
#include "mgatex.h"
#include "mgaspan.h"
#include "mgaioctl.h"
#include "mgatris.h"
#include "mgavb.h"
#include "mgapixel.h"
#include "mga_xmesa.h"
#include "mga_dri.h"

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

#include "extensions.h"
#include "drirenderbuffer.h"

#include "GL/internal/dri_interface.h"

#define need_GL_ARB_multisample
#define need_GL_ARB_texture_compression
#define need_GL_ARB_vertex_buffer_object
#define need_GL_ARB_vertex_program
#define need_GL_EXT_fog_coord
#define need_GL_EXT_gpu_program_parameters
#define need_GL_EXT_multi_draw_arrays
#define need_GL_EXT_secondary_color
#if 0
#define need_GL_EXT_paletted_texture
#endif
#define need_GL_APPLE_vertex_array_object
#define need_GL_NV_vertex_program
#include "extension_helper.h"

/* MGA 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_QUALITY
        DRI_CONF_TEXTURE_DEPTH(DRI_CONF_TEXTURE_DEPTH_FB)
        DRI_CONF_COLOR_REDUCTION(DRI_CONF_COLOR_REDUCTION_DITHER)
    DRI_CONF_SECTION_END
    DRI_CONF_SECTION_SOFTWARE
        DRI_CONF_ARB_VERTEX_PROGRAM(true)
        DRI_CONF_NV_VERTEX_PROGRAM(true)
    DRI_CONF_SECTION_END
    DRI_CONF_SECTION_DEBUG
        DRI_CONF_NO_RAST(false)
    DRI_CONF_SECTION_END
DRI_CONF_END;
static const GLuint __driNConfigOptions = 6;

#ifndef MGA_DEBUG
int MGA_DEBUG = 0;
#endif

static const __DRIconfig **
mgaFillInModes( __DRIscreenPrivate *psp,
		unsigned pixel_bits, unsigned depth_bits,
		unsigned stencil_bits, GLboolean have_back_buffer )
{
    __DRIconfig **configs;
    __GLcontextModes * m;
    unsigned depth_buffer_factor;
    unsigned back_buffer_factor;
    GLenum fb_format;
    GLenum fb_type;
    int i;

    /* GLX_SWAP_COPY_OML is only supported because the MGA driver doesn't
     * support pageflipping at all.
     */
    static const GLenum back_buffer_modes[] = {
	GLX_NONE, GLX_SWAP_UNDEFINED_OML, GLX_SWAP_COPY_OML
    };

    u_int8_t depth_bits_array[3];
    u_int8_t stencil_bits_array[3];


    depth_bits_array[0] = 0;
    depth_bits_array[1] = depth_bits;
    depth_bits_array[2] = 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] = 0;
    stencil_bits_array[2] = (stencil_bits == 0) ? 8 : stencil_bits;

    depth_buffer_factor = ((depth_bits != 0) || (stencil_bits != 0)) ? 3 : 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_BGR;
        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);
    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;
}

const __DRIextension *mgaScreenExtensions[] = {
    &driReadDrawableExtension,
    &driSwapControlExtension.base,
    &driFrameTrackingExtension.base,
    &driMediaStreamCounterExtension.base,
    NULL
};

static GLboolean
mgaInitDriver(__DRIscreenPrivate *sPriv)
{
   mgaScreenPrivate *mgaScreen;
   MGADRIPtr         serverInfo = (MGADRIPtr)sPriv->pDevPriv;

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

   /* Allocate the private area */
   mgaScreen = (mgaScreenPrivate *)MALLOC(sizeof(mgaScreenPrivate));
   if (!mgaScreen) {
      __driUtilMessage("Couldn't malloc screen struct");
      return GL_FALSE;
   }

   mgaScreen->sPriv = sPriv;
   sPriv->private = (void *)mgaScreen;

   if (sPriv->drm_version.minor >= 1) {
      int ret;
      drm_mga_getparam_t gp;

      gp.param = MGA_PARAM_IRQ_NR;
      gp.value = &mgaScreen->irq;
      mgaScreen->irq = 0;

      ret = drmCommandWriteRead( sPriv->fd, DRM_MGA_GETPARAM,
				    &gp, sizeof(gp));
      if (ret) {
	    fprintf(stderr, "drmMgaGetParam (MGA_PARAM_IRQ_NR): %d\n", ret);
	    FREE(mgaScreen);
	    sPriv->private = NULL;
	    return GL_FALSE;
      }
   }

   sPriv->extensions = mgaScreenExtensions;

   if (serverInfo->chipset != MGA_CARD_TYPE_G200 &&
       serverInfo->chipset != MGA_CARD_TYPE_G400) {
      FREE(mgaScreen);
      sPriv->private = NULL;
      __driUtilMessage("Unrecognized chipset");
      return GL_FALSE;
   }


   mgaScreen->chipset = serverInfo->chipset;
   mgaScreen->cpp = serverInfo->cpp;

   mgaScreen->agpMode = serverInfo->agpMode;

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


   /* The only reason that the MMIO region needs to be accessable and the
    * primary DMA region base address needs to be known is so that the driver
    * can busy wait for certain DMA operations to complete (see
    * mgaWaitForFrameCompletion in mgaioctl.c).
    *
    * Starting with MGA DRM version 3.2, these are completely unneeded as
    * there is a new, in-kernel mechanism for handling the wait.
    */

   if (mgaScreen->sPriv->drm_version.minor < 2) {
      mgaScreen->mmio.handle = serverInfo->registers.handle;
      mgaScreen->mmio.size = serverInfo->registers.size;
      if ( drmMap( sPriv->fd,
		   mgaScreen->mmio.handle, mgaScreen->mmio.size,
		   &mgaScreen->mmio.map ) < 0 ) {
	 FREE( mgaScreen );
	 sPriv->private = NULL;
	 __driUtilMessage( "Couldn't map MMIO registers" );
	 return GL_FALSE;
      }

      mgaScreen->primary.handle = serverInfo->primary.handle;
      mgaScreen->primary.size = serverInfo->primary.size;
   }
   else {
      (void) memset( & mgaScreen->primary, 0, sizeof( mgaScreen->primary ) );
      (void) memset( & mgaScreen->mmio, 0, sizeof( mgaScreen->mmio ) );
   }

   mgaScreen->textureOffset[MGA_CARD_HEAP] = serverInfo->textureOffset;
   mgaScreen->textureOffset[MGA_AGP_HEAP] = (serverInfo->agpTextureOffset |
					     PDEA_pagpxfer_enable | 1);

   mgaScreen->textureSize[MGA_CARD_HEAP] = serverInfo->textureSize;
   mgaScreen->textureSize[MGA_AGP_HEAP] = serverInfo->agpTextureSize;

   
   /* The texVirtual array stores the base addresses in the CPU's address
    * space of the texture memory pools.  The base address of the on-card
    * memory pool is calculated as an offset of the base of video memory.  The
    * AGP texture pool has to be mapped into the processes address space by
    * the DRM. 
    */

   mgaScreen->texVirtual[MGA_CARD_HEAP] = (char *)(mgaScreen->sPriv->pFB +
					   serverInfo->textureOffset);

   if ( serverInfo->agpTextureSize > 0 ) {
      if (drmMap(sPriv->fd, serverInfo->agpTextureOffset,
		 serverInfo->agpTextureSize,
		 (drmAddress *)&mgaScreen->texVirtual[MGA_AGP_HEAP]) != 0) {
	 FREE(mgaScreen);
	 sPriv->private = NULL;
	 __driUtilMessage("Couldn't map agptexture region");
	 return GL_FALSE;
      }
   }


   /* For calculating setupdma addresses.
    */

   mgaScreen->bufs = drmMapBufs(sPriv->fd);
   if (!mgaScreen->bufs) {
      FREE(mgaScreen);
      sPriv->private = NULL;
      __driUtilMessage("Couldn't map dma buffers");
      return GL_FALSE;
   }
   mgaScreen->sarea_priv_offset = serverInfo->sarea_priv_offset;

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

   return GL_TRUE;
}


static void
mgaDestroyScreen(__DRIscreenPrivate *sPriv)
{
   mgaScreenPrivate *mgaScreen = (mgaScreenPrivate *) sPriv->private;

   if (MGA_DEBUG&DEBUG_VERBOSE_DRI)