src/mesa/drivers/dri/intel/intel_screen.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include "glheader.h"
  29 #include "context.h"
  30 #include "framebuffer.h"
  31 #include "matrix.h"
  32 #include "renderbuffer.h"
  33 #include "simple_list.h"
  34 #include "utils.h"
  35 #include "vblank.h"
  36 #include "xmlpool.h"
  37
  38
  39 #include "intel_screen.h"
  40
  41 #include "intel_buffers.h"
  42 #include "intel_tex.h"
  43 #include "intel_span.h"
  44 #include "intel_ioctl.h"
  45 #include "intel_fbo.h"
  46 #include "intel_chipset.h"
  47
  48 #include "i915_drm.h"
  49 #include "i830_dri.h"
  50 #include "intel_regions.h"
  51 #include "intel_batchbuffer.h"
  52 #include "intel_bufmgr.h"
  53
  54 PUBLIC const char __driConfigOptions[] =
  55    DRI_CONF_BEGIN
  56    DRI_CONF_SECTION_PERFORMANCE
  57       DRI_CONF_FTHROTTLE_MODE(DRI_CONF_FTHROTTLE_IRQS)
  58       DRI_CONF_VBLANK_MODE(DRI_CONF_VBLANK_ALWAYS_SYNC)
  59       /* Options correspond to DRI_CONF_BO_REUSE_DISABLED,
  60        * DRI_CONF_BO_REUSE_ALL
  61        */
  62       DRI_CONF_OPT_BEGIN_V(bo_reuse, enum, 1, "0:1")
  63          DRI_CONF_DESC_BEGIN(en, "Buffer object reuse")
  64             DRI_CONF_ENUM(0, "Disable buffer object reuse")
  65             DRI_CONF_ENUM(1, "Enable reuse of all sizes of buffer objects")
  66          DRI_CONF_DESC_END
  67       DRI_CONF_OPT_END
  68    DRI_CONF_SECTION_END
  69    DRI_CONF_SECTION_QUALITY
  70       DRI_CONF_FORCE_S3TC_ENABLE(false)
  71       DRI_CONF_ALLOW_LARGE_TEXTURES(2)
  72    DRI_CONF_SECTION_END
  73    DRI_CONF_SECTION_DEBUG
  74      DRI_CONF_NO_RAST(false)
  75    DRI_CONF_SECTION_END
  76 DRI_CONF_END;
  77
  78 const GLuint __driNConfigOptions = 6;
  79
  80 #ifdef USE_NEW_INTERFACE
  81 static PFNGLXCREATECONTEXTMODES create_context_modes = NULL;
  82 #endif /*USE_NEW_INTERFACE */
  83
  84 /**
  85  * Map all the memory regions described by the screen.
  86  * \return GL_TRUE if success, GL_FALSE if error.
  87  */
  88 GLboolean
  89 intelMapScreenRegions(__DRIscreenPrivate * sPriv)
  90 {
  91    intelScreenPrivate *intelScreen = (intelScreenPrivate *) sPriv->private;
  92
  93    if (0)
  94       _mesa_printf("TEX 0x%08x ", intelScreen->tex.handle);
  95    if (intelScreen->tex.size != 0) {
  96       if (drmMap(sPriv->fd,
  97                  intelScreen->tex.handle,
  98                  intelScreen->tex.size,
  99                  (drmAddress *) & intelScreen->tex.map) != 0) {
 100          intelUnmapScreenRegions(intelScreen);
 101          return GL_FALSE;
 102       }
 103    }
 104
 105    return GL_TRUE;
 106 }
 107
 108 void
 109 intelUnmapScreenRegions(intelScreenPrivate * intelScreen)
 110 {
 111    if (intelScreen->tex.map) {
 112       drmUnmap(intelScreen->tex.map, intelScreen->tex.size);
 113       intelScreen->tex.map = NULL;
 114    }
 115 }
 116
 117
 118 static void
 119 intelPrintDRIInfo(intelScreenPrivate * intelScreen,
 120                   __DRIscreenPrivate * sPriv, I830DRIPtr gDRIPriv)
 121 {
 122    fprintf(stderr, "*** Front size:   0x%x  offset: 0x%x  pitch: %d\n",
 123            intelScreen->front.size, intelScreen->front.offset,
 124            intelScreen->pitch);
 125    fprintf(stderr, "*** Back size:    0x%x  offset: 0x%x  pitch: %d\n",
 126            intelScreen->back.size, intelScreen->back.offset,
 127            intelScreen->pitch);
 128    fprintf(stderr, "*** Depth size:   0x%x  offset: 0x%x  pitch: %d\n",
 129            intelScreen->depth.size, intelScreen->depth.offset,
 130            intelScreen->pitch);
 131    fprintf(stderr, "*** Texture size: 0x%x  offset: 0x%x\n",
 132            intelScreen->tex.size, intelScreen->tex.offset);
 133    fprintf(stderr, "*** Memory : 0x%x\n", gDRIPriv->mem);
 134 }
 135
 136
 137 static void
 138 intelPrintSAREA(const struct drm_i915_sarea * sarea)
 139 {
 140    fprintf(stderr, "SAREA: sarea width %d  height %d\n", sarea->width,
 141            sarea->height);
 142    fprintf(stderr, "SAREA: pitch: %d\n", sarea->pitch);
 143    fprintf(stderr,
 144            "SAREA: front offset: 0x%08x  size: 0x%x  handle: 0x%x tiled: %d\n",
 145            sarea->front_offset, sarea->front_size,
 146            (unsigned) sarea->front_handle, sarea->front_tiled);
 147    fprintf(stderr,
 148            "SAREA: back  offset: 0x%08x  size: 0x%x  handle: 0x%x tiled: %d\n",
 149            sarea->back_offset, sarea->back_size,
 150            (unsigned) sarea->back_handle, sarea->back_tiled);
 151    fprintf(stderr, "SAREA: depth offset: 0x%08x  size: 0x%x  handle: 0x%x tiled: %d\n",
 152            sarea->depth_offset, sarea->depth_size,
 153            (unsigned) sarea->depth_handle, sarea->depth_tiled);
 154    fprintf(stderr, "SAREA: tex   offset: 0x%08x  size: 0x%x  handle: 0x%x\n",
 155            sarea->tex_offset, sarea->tex_size, (unsigned) sarea->tex_handle);
 156 }
 157
 158
 159 /**
 160  * A number of the screen parameters are obtained/computed from
 161  * information in the SAREA.  This function updates those parameters.
 162  */
 163 void
 164 intelUpdateScreenFromSAREA(intelScreenPrivate * intelScreen,
 165                            struct drm_i915_sarea * sarea)
 166 {
 167    intelScreen->width = sarea->width;
 168    intelScreen->height = sarea->height;
 169    intelScreen->pitch = sarea->pitch;
 170
 171    intelScreen->front.offset = sarea->front_offset;
 172    intelScreen->front.handle = sarea->front_handle;
 173    intelScreen->front.size = sarea->front_size;
 174    intelScreen->front.tiled = sarea->front_tiled;
 175
 176    intelScreen->back.offset = sarea->back_offset;
 177    intelScreen->back.handle = sarea->back_handle;
 178    intelScreen->back.size = sarea->back_size;
 179    intelScreen->back.tiled = sarea->back_tiled;
 180
 181    if (intelScreen->driScrnPriv->ddx_version.minor >= 8) {
 182       intelScreen->third.offset = sarea->third_offset;
 183       intelScreen->third.handle = sarea->third_handle;
 184       intelScreen->third.size = sarea->third_size;
 185       intelScreen->third.tiled = sarea->third_tiled;
 186    }
 187
 188    intelScreen->depth.offset = sarea->depth_offset;
 189    intelScreen->depth.handle = sarea->depth_handle;
 190    intelScreen->depth.size = sarea->depth_size;
 191    intelScreen->depth.tiled = sarea->depth_tiled;
 192
 193    if (intelScreen->driScrnPriv->ddx_version.minor >= 9) {
 194       intelScreen->front.bo_handle = sarea->front_bo_handle;
 195       intelScreen->back.bo_handle = sarea->back_bo_handle;
 196       intelScreen->third.bo_handle = sarea->third_bo_handle;
 197       intelScreen->depth.bo_handle = sarea->depth_bo_handle;
 198    } else {
 199       intelScreen->front.bo_handle = -1;
 200       intelScreen->back.bo_handle = -1;
 201       intelScreen->third.bo_handle = -1;
 202       intelScreen->depth.bo_handle = -1;
 203    }
 204
 205    intelScreen->tex.offset = sarea->tex_offset;
 206    intelScreen->logTextureGranularity = sarea->log_tex_granularity;
 207    intelScreen->tex.handle = sarea->tex_handle;
 208    intelScreen->tex.size = sarea->tex_size;
 209
 210    if (0)
 211       intelPrintSAREA(sarea);
 212 }
 213
 214 static const __DRItexOffsetExtension intelTexOffsetExtension = {
 215    { __DRI_TEX_OFFSET },
 216    intelSetTexOffset,
 217 };
 218
 219 static const __DRItexBufferExtension intelTexBufferExtension = {
 220     { __DRI_TEX_BUFFER, __DRI_TEX_BUFFER_VERSION },
 221    intelSetTexBuffer,
 222 };
 223
 224 static const __DRIextension *intelScreenExtensions[] = {
 225     &driReadDrawableExtension,
 226     &driCopySubBufferExtension.base,
 227     &driSwapControlExtension.base,
 228     &driFrameTrackingExtension.base,
 229     &driMediaStreamCounterExtension.base,
 230     &intelTexOffsetExtension.base,
 231     &intelTexBufferExtension.base,
 232     NULL
 233 };
 234
 235 static GLboolean
 236 intel_get_param(__DRIscreenPrivate *psp, int param, int *value)
 237 {
 238    int ret;
 239    struct drm_i915_getparam gp;
 240
 241    gp.param = param;
 242    gp.value = value;
 243
 244    ret = drmCommandWriteRead(psp->fd, DRM_I915_GETPARAM, &gp, sizeof(gp));
 245    if (ret) {
 246       fprintf(stderr, "drm_i915_getparam: %d\n", ret);
 247       return GL_FALSE;
 248    }
 249
 250    return GL_TRUE;
 251 }
 252
 253 static GLboolean intelInitDriver(__DRIscreenPrivate *sPriv)
 254 {
 255    intelScreenPrivate *intelScreen;
 256    I830DRIPtr gDRIPriv = (I830DRIPtr) sPriv->pDevPriv;
 257    struct drm_i915_sarea *sarea;
 258
 259    if (sPriv->devPrivSize != sizeof(I830DRIRec)) {
 260       fprintf(stderr,
 261               "\nERROR!  sizeof(I830DRIRec) does not match passed size from device driver\n");
 262       return GL_FALSE;
 263    }
 264
 265    /* Allocate the private area */
 266    intelScreen = (intelScreenPrivate *) CALLOC(sizeof(intelScreenPrivate));
 267    if (!intelScreen) {
 268       fprintf(stderr, "\nERROR!  Allocating private area failed\n");
 269       return GL_FALSE;
 270    }
 271    /* parse information in __driConfigOptions */
 272    driParseOptionInfo(&intelScreen->optionCache,
 273                       __driConfigOptions, __driNConfigOptions);
 274
 275    intelScreen->driScrnPriv = sPriv;
 276    sPriv->private = (void *) intelScreen;
 277    intelScreen->sarea_priv_offset = gDRIPriv->sarea_priv_offset;
 278    sarea = (struct drm_i915_sarea *)
 279       (((GLubyte *) sPriv->pSAREA) + intelScreen->sarea_priv_offset);
 280
 281    intelScreen->deviceID = gDRIPriv->deviceID;
 282
 283    intelUpdateScreenFromSAREA(intelScreen, sarea);
 284
 285    if (!intelMapScreenRegions(sPriv)) {
 286       fprintf(stderr, "\nERROR!  mapping regions\n");
 287       _mesa_free(intelScreen);
 288       sPriv->private = NULL;
 289       return GL_FALSE;
 290    }
 291
 292    intelScreen->sarea_priv_offset = gDRIPriv->sarea_priv_offset;
 293
 294    if (0)
 295       intelPrintDRIInfo(intelScreen, sPriv, gDRIPriv);
 296
 297    intelScreen->drmMinor = sPriv->drm_version.minor;
 298
 299    /* Determine if IRQs are active? */
 300    if (!intel_get_param(sPriv, I915_PARAM_IRQ_ACTIVE,
 301                         &intelScreen->irq_active))
 302       return GL_FALSE;
 303
 304    /* Determine if batchbuffers are allowed */
 305    if (!intel_get_param(sPriv, I915_PARAM_ALLOW_BATCHBUFFER,
 306                         &intelScreen->allow_batchbuffer))
 307       return GL_FALSE;
 308
 309    sPriv->extensions = intelScreenExtensions;
 310
 311    return GL_TRUE;
 312 }
 313
 314
 315 static void
 316 intelDestroyScreen(__DRIscreenPrivate * sPriv)
 317 {
 318    intelScreenPrivate *intelScreen = (intelScreenPrivate *) sPriv->private;
 319
 320    intelUnmapScreenRegions(intelScreen);
 321
 322    FREE(intelScreen);
 323    sPriv->private = NULL;
 324 }
 325
 326
 327 /**
 328  * This is called when we need to set up GL rendering to a new X window.
 329  */
 330 static GLboolean
 331 intelCreateBuffer(__DRIscreenPrivate * driScrnPriv,
 332                   __DRIdrawablePrivate * driDrawPriv,
 333                   const __GLcontextModes * mesaVis, GLboolean isPixmap)
 334 {
 335    intelScreenPrivate *screen = (intelScreenPrivate *) driScrnPriv->private;
 336
 337    if (isPixmap) {
 338       return GL_FALSE;          /* not implemented */
 339    }
 340    else {
 341       GLboolean swStencil = (mesaVis->stencilBits > 0 &&
 342                              mesaVis->depthBits != 24);
 343       GLenum rgbFormat = (mesaVis->redBits == 5 ? GL_RGB5 : GL_RGBA8);
 344
 345       struct intel_framebuffer *intel_fb = CALLOC_STRUCT(intel_framebuffer);
 346
 347       if (!intel_fb)
 348          return GL_FALSE;
 349
 350       _mesa_initialize_framebuffer(&intel_fb->Base, mesaVis);
 351
 352       /* setup the hardware-based renderbuffers */
 353       intel_fb->color_rb[0] = intel_create_renderbuffer(rgbFormat);
 354       _mesa_add_renderbuffer(&intel_fb->Base, BUFFER_FRONT_LEFT,
 355                              &intel_fb->color_rb[0]->Base);
 356
 357       if (mesaVis->doubleBufferMode) {
 358          intel_fb->color_rb[1] = intel_create_renderbuffer(rgbFormat);
 359
 360          _mesa_add_renderbuffer(&intel_fb->Base, BUFFER_BACK_LEFT,
 361                                 &intel_fb->color_rb[1]->Base);
 362
 363          if (screen->third.handle) {
 364             struct gl_renderbuffer *tmp_rb = NULL;
 365
 366             intel_fb->color_rb[2] = intel_create_renderbuffer(rgbFormat);
 367             _mesa_reference_renderbuffer(&tmp_rb, &intel_fb->color_rb[2]->Base);
 368          }
 369       }
 370
 371       if (mesaVis->depthBits == 24) {
 372          if (mesaVis->stencilBits == 8) {
 373             /* combined depth/stencil buffer */
 374             struct intel_renderbuffer *depthStencilRb
 375                = intel_create_renderbuffer(GL_DEPTH24_STENCIL8_EXT);
 376             /* note: bind RB to two attachment points */
 377             _mesa_add_renderbuffer(&intel_fb->Base, BUFFER_DEPTH,
 378                                    &depthStencilRb->Base);
 379             _mesa_add_renderbuffer(&intel_fb->Base, BUFFER_STENCIL,
 380                                    &depthStencilRb->Base);
 381          } else {
 382             struct intel_renderbuffer *depthRb
 383                = intel_create_renderbuffer(GL_DEPTH_COMPONENT24);
 384             _mesa_add_renderbuffer(&intel_fb->Base, BUFFER_DEPTH,
 385                                    &depthRb->Base);
 386          }
 387       }
 388       else if (mesaVis->depthBits == 16) {
 389          /* just 16-bit depth buffer, no hw stencil */
 390          struct intel_renderbuffer *depthRb
 391             = intel_create_renderbuffer(GL_DEPTH_COMPONENT16);
 392          _mesa_add_renderbuffer(&intel_fb->Base, BUFFER_DEPTH, &depthRb->Base);
 393       }
 394
 395       /* now add any/all software-based renderbuffers we may need */
 396       _mesa_add_soft_renderbuffers(&intel_fb->Base,
 397                                    GL_FALSE, /* never sw color */
 398                                    GL_FALSE, /* never sw depth */
 399                                    swStencil, mesaVis->accumRedBits > 0,
 400                                    GL_FALSE, /* never sw alpha */
 401                                    GL_FALSE  /* never sw aux */ );
 402       driDrawPriv->driverPrivate = (void *) intel_fb;
 403
 404       return GL_TRUE;
 405    }
 406 }
 407
 408 static void
 409 intelDestroyBuffer(__DRIdrawablePrivate * driDrawPriv)
 410 {
 411    _mesa_unreference_framebuffer((GLframebuffer **)(&(driDrawPriv->driverPrivate)));
 412 }
 413
 414
 415 /**
 416  * Get information about previous buffer swaps.
 417  */
 418 static int
 419 intelGetSwapInfo(__DRIdrawablePrivate * dPriv, __DRIswapInfo * sInfo)
 420 {
 421    struct intel_framebuffer *intel_fb;
 422
 423    if ((dPriv == NULL) || (dPriv->driverPrivate == NULL)
 424        || (sInfo == NULL)) {
 425       return -1;
 426    }
 427
 428    intel_fb = dPriv->driverPrivate;
 429    sInfo->swap_count = intel_fb->swap_count;
 430    sInfo->swap_ust = intel_fb->swap_ust;
 431    sInfo->swap_missed_count = intel_fb->swap_missed_count;
 432
 433    sInfo->swap_missed_usage = (sInfo->swap_missed_count != 0)
 434       ? driCalculateSwapUsage(dPriv, 0, intel_fb->swap_missed_ust)
 435       : 0.0;
 436
 437    return 0;
 438 }
 439
 440
 441 /* There are probably better ways to do this, such as an
 442  * init-designated function to register chipids and createcontext
 443  * functions.
 444  */
 445 extern GLboolean i830CreateContext(const __GLcontextModes * mesaVis,
 446                                    __DRIcontextPrivate * driContextPriv,
 447                                    void *sharedContextPrivate);
 448
 449 extern GLboolean i915CreateContext(const __GLcontextModes * mesaVis,
 450                                    __DRIcontextPrivate * driContextPriv,
 451                                    void *sharedContextPrivate);
 452 extern GLboolean brwCreateContext(const __GLcontextModes * mesaVis,
 453                                   __DRIcontextPrivate * driContextPriv,
 454                                   void *sharedContextPrivate);
 455
 456 static GLboolean
 457 intelCreateContext(const __GLcontextModes * mesaVis,
 458                    __DRIcontextPrivate * driContextPriv,
 459                    void *sharedContextPrivate)
 460 {
 461    __DRIscreenPrivate *sPriv = driContextPriv->driScreenPriv;
 462    intelScreenPrivate *intelScreen = (intelScreenPrivate *) sPriv->private;
 463
 464 #ifdef I915
 465    if (IS_9XX(intelScreen->deviceID)) {
 466       if (!IS_965(intelScreen->deviceID)) {
 467          return i915CreateContext(mesaVis, driContextPriv,
 468                                   sharedContextPrivate);
 469       }
 470    } else {
 471       return i830CreateContext(mesaVis, driContextPriv, sharedContextPrivate);
 472    }
 473 #else
 474    if (IS_965(intelScreen->deviceID))
 475       return brwCreateContext(mesaVis, driContextPriv, sharedContextPrivate);
 476 #endif
 477    fprintf(stderr, "Unrecognized deviceID %x\n", intelScreen->deviceID);
 478    return GL_FALSE;
 479 }
 480
 481
 482 static __DRIconfig **
 483 intelFillInModes(__DRIscreenPrivate *psp,
 484                  unsigned pixel_bits, unsigned depth_bits,
 485                  unsigned stencil_bits, GLboolean have_back_buffer)
 486 {
 487    __DRIconfig **configs;
 488    __GLcontextModes *m;
 489    unsigned depth_buffer_factor;
 490    unsigned back_buffer_factor;
 491    GLenum fb_format;
 492    GLenum fb_type;
 493    int i;
 494
 495    /* GLX_SWAP_COPY_OML is only supported because the Intel driver doesn't
 496     * support pageflipping at all.
 497     */
 498    static const GLenum back_buffer_modes[] = {
 499       GLX_NONE, GLX_SWAP_UNDEFINED_OML, GLX_SWAP_COPY_OML
 500    };
 501
 502    u_int8_t depth_bits_array[3];
 503    u_int8_t stencil_bits_array[3];
 504
 505    depth_bits_array[0] = 0;
 506    depth_bits_array[1] = depth_bits;
 507    depth_bits_array[2] = depth_bits;
 508
 509    /* Just like with the accumulation buffer, always provide some modes
 510     * with a stencil buffer.  It will be a sw fallback, but some apps won't
 511     * care about that.
 512     */
 513    stencil_bits_array[0] = 0;
 514    stencil_bits_array[1] = 0;
 515    if (depth_bits == 24)
 516       stencil_bits_array[1] = (stencil_bits == 0) ? 8 : stencil_bits;
 517
 518    stencil_bits_array[2] = (stencil_bits == 0) ? 8 : stencil_bits;
 519
 520    depth_buffer_factor = ((depth_bits != 0) || (stencil_bits != 0)) ? 3 : 1;
 521    back_buffer_factor = (have_back_buffer) ? 3 : 1;
 522
 523    if (pixel_bits == 16) {
 524       fb_format = GL_RGB;
 525       fb_type = GL_UNSIGNED_SHORT_5_6_5;
 526    }
 527    else {
 528       fb_format = GL_BGRA;
 529       fb_type = GL_UNSIGNED_INT_8_8_8_8_REV;
 530    }
 531
 532    configs = driCreateConfigs(fb_format, fb_type,
 533                               depth_bits_array, stencil_bits_array,
 534                               depth_buffer_factor, back_buffer_modes,
 535                               back_buffer_factor);
 536    if (configs == NULL) {
 537     fprintf(stderr, "[%s:%u] Error creating FBConfig!\n", __func__,
 538               __LINE__);
 539       return NULL;
 540    }
 541
 542    /* Mark the visual as slow if there are "fake" stencil bits.
 543     */
 544    for (i = 0; configs[i]; i++) {
 545       m = &configs[i]->modes;
 546       if ((m->stencilBits != 0) && (m->stencilBits != stencil_bits)) {
 547          m->visualRating = GLX_SLOW_CONFIG;
 548       }
 549    }
 550
 551    return configs;
 552 }
 553
 554
 555 /**
 556  * This is the driver specific part of the createNewScreen entry point.
 557  * Called when using legacy DRI.
 558  *
 559  * \todo maybe fold this into intelInitDriver
 560  *
 561  * \return the __GLcontextModes supported by this driver
 562  */
 563 static const __DRIconfig **intelInitScreen(__DRIscreenPrivate *psp)
 564 {
 565 #ifdef I915
 566    static const __DRIversion ddx_expected = { 1, 5, 0 };
 567 #else
 568    static const __DRIversion ddx_expected = { 1, 6, 0 };
 569 #endif
 570    static const __DRIversion dri_expected = { 4, 0, 0 };
 571    static const __DRIversion drm_expected = { 1, 5, 0 };
 572    I830DRIPtr dri_priv = (I830DRIPtr) psp->pDevPriv;
 573
 574    if (!driCheckDriDdxDrmVersions2("i915",
 575                                    &psp->dri_version, &dri_expected,
 576                                    &psp->ddx_version, &ddx_expected,
 577                                    &psp->drm_version, &drm_expected)) {
 578       return NULL;
 579    }
 580
 581    /* Calling driInitExtensions here, with a NULL context pointer,
 582     * does not actually enable the extensions.  It just makes sure
 583     * that all the dispatch offsets for all the extensions that
 584     * *might* be enables are known.  This is needed because the
 585     * dispatch offsets need to be known when _mesa_context_create is
 586     * called, but we can't enable the extensions until we have a
 587     * context pointer.
 588     *
 589     * Hello chicken.  Hello egg.  How are you two today?
 590     */
 591    intelInitExtensions(NULL, GL_TRUE);
 592
 593    if (!intelInitDriver(psp))
 594        return NULL;
 595
 596    psp->extensions = intelScreenExtensions;
 597
 598    return (const __DRIconfig **)
 599        intelFillInModes(psp, dri_priv->cpp * 8,
 600                         (dri_priv->cpp == 2) ? 16 : 24,
 601                         (dri_priv->cpp == 2) ? 0  : 8, 1);
 602 }
 603
 604 struct intel_context *intelScreenContext(intelScreenPrivate *intelScreen)
 605 {
 606   /*
 607    * This should probably change to have the screen allocate a dummy
 608    * context at screen creation. For now just use the current context.
 609    */
 610
 611   GET_CURRENT_CONTEXT(ctx);
 612   if (ctx == NULL) {
 613      _mesa_problem(NULL, "No current context in intelScreenContext\n");
 614      return NULL;
 615   }
 616   return intel_context(ctx);
 617 }
 618
 619 /**
 620  * This is the driver specific part of the createNewScreen entry point.
 621  * Called when using DRI2.
 622  *
 623  * \return the __GLcontextModes supported by this driver
 624  */
 625 static const
 626 __DRIconfig **intelInitScreen2(__DRIscreenPrivate *psp)
 627 {
 628    intelScreenPrivate *intelScreen;
 629
 630    /* Calling driInitExtensions here, with a NULL context pointer,
 631     * does not actually enable the extensions.  It just makes sure
 632     * that all the dispatch offsets for all the extensions that
 633     * *might* be enables are known.  This is needed because the
 634     * dispatch offsets need to be known when _mesa_context_create is
 635     * called, but we can't enable the extensions until we have a
 636     * context pointer.
 637     *
 638     * Hello chicken.  Hello egg.  How are you two today?
 639     */
 640    intelInitExtensions(NULL, GL_TRUE);
 641
 642    /* Allocate the private area */
 643    intelScreen = (intelScreenPrivate *) CALLOC(sizeof(intelScreenPrivate));
 644    if (!intelScreen) {
 645       fprintf(stderr, "\nERROR!  Allocating private area failed\n");
 646       return GL_FALSE;
 647    }
 648    /* parse information in __driConfigOptions */
 649    driParseOptionInfo(&intelScreen->optionCache,
 650                       __driConfigOptions, __driNConfigOptions);
 651
 652    intelScreen->driScrnPriv = psp;
 653    psp->private = (void *) intelScreen;
 654
 655    intelScreen->drmMinor = psp->drm_version.minor;
 656
 657    /* Determine chipset ID */
 658    if (!intel_get_param(psp, I915_PARAM_CHIPSET_ID,
 659                         &intelScreen->deviceID))
 660       return GL_FALSE;
 661
 662    intelScreen->irq_active = 1;
 663    psp->extensions = intelScreenExtensions;
 664
 665    return driConcatConfigs(intelFillInModes(psp, 16, 16, 0, 1),
 666                            intelFillInModes(psp, 32, 24, 8, 1));
 667 }
 668
 669 const struct __DriverAPIRec driDriverAPI = {
 670    .InitScreen           = intelInitScreen,
 671    .DestroyScreen        = intelDestroyScreen,
 672    .CreateContext        = intelCreateContext,
 673    .DestroyContext       = intelDestroyContext,
 674    .CreateBuffer         = intelCreateBuffer,
 675    .DestroyBuffer        = intelDestroyBuffer,
 676    .SwapBuffers          = intelSwapBuffers,
 677    .MakeCurrent          = intelMakeCurrent,
 678    .UnbindContext        = intelUnbindContext,
 679    .GetSwapInfo          = intelGetSwapInfo,
 680    .GetDrawableMSC       = driDrawableGetMSC32,
 681    .WaitForMSC           = driWaitForMSC32,
 682    .CopySubBuffer        = intelCopySubBuffer,
 683
 684    .InitScreen2          = intelInitScreen2,
 685 };