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 "main/glheader.h"
  29 #include "main/context.h"
  30 #include "main/framebuffer.h"
  31 #include "main/renderbuffer.h"
  32
  33 #include "utils.h"
  34 #include "vblank.h"
  35 #include "xmlpool.h"
  36
  37 #include "intel_batchbuffer.h"
  38 #include "intel_buffers.h"
  39 #include "intel_bufmgr.h"
  40 #include "intel_chipset.h"
  41 #include "intel_extensions.h"
  42 #include "intel_fbo.h"
  43 #include "intel_regions.h"
  44 #include "intel_swapbuffers.h"
  45 #include "intel_screen.h"
  46 #include "intel_span.h"
  47 #include "intel_tex.h"
  48
  49 #include "i915_drm.h"
  50 #include "i830_dri.h"
  51
  52
  53 PUBLIC const char __driConfigOptions[] =
  54    DRI_CONF_BEGIN
  55    DRI_CONF_SECTION_PERFORMANCE
  56       DRI_CONF_FTHROTTLE_MODE(DRI_CONF_FTHROTTLE_IRQS)
  57       DRI_CONF_VBLANK_MODE(DRI_CONF_VBLANK_ALWAYS_SYNC)
  58       /* Options correspond to DRI_CONF_BO_REUSE_DISABLED,
  59        * DRI_CONF_BO_REUSE_ALL
  60        */
  61       DRI_CONF_OPT_BEGIN_V(bo_reuse, enum, 1, "0:1")
  62          DRI_CONF_DESC_BEGIN(en, "Buffer object reuse")
  63             DRI_CONF_ENUM(0, "Disable buffer object reuse")
  64             DRI_CONF_ENUM(1, "Enable reuse of all sizes of buffer objects")
  65          DRI_CONF_DESC_END
  66       DRI_CONF_OPT_END
  67    DRI_CONF_SECTION_END
  68    DRI_CONF_SECTION_QUALITY
  69       DRI_CONF_FORCE_S3TC_ENABLE(false)
  70       DRI_CONF_ALLOW_LARGE_TEXTURES(2)
  71    DRI_CONF_SECTION_END
  72    DRI_CONF_SECTION_DEBUG
  73      DRI_CONF_NO_RAST(false)
  74      DRI_CONF_ALWAYS_FLUSH_BATCH(false)
  75      DRI_CONF_ALWAYS_FLUSH_CACHE(false)
  76    DRI_CONF_SECTION_END
  77 DRI_CONF_END;
  78
  79 const GLuint __driNConfigOptions = 8;
  80
  81 #ifdef USE_NEW_INTERFACE
  82 static PFNGLXCREATECONTEXTMODES create_context_modes = NULL;
  83 #endif /*USE_NEW_INTERFACE */
  84
  85 /**
  86  * Map all the memory regions described by the screen.
  87  * \return GL_TRUE if success, GL_FALSE if error.
  88  */
  89 GLboolean
  90 intelMapScreenRegions(__DRIscreenPrivate * sPriv)
  91 {
  92    intelScreenPrivate *intelScreen = (intelScreenPrivate *) sPriv->private;
  93
  94    if (0)
  95       _mesa_printf("TEX 0x%08x ", intelScreen->tex.handle);
  96    if (intelScreen->tex.size != 0) {
  97       if (drmMap(sPriv->fd,
  98                  intelScreen->tex.handle,
  99                  intelScreen->tex.size,
 100                  (drmAddress *) & intelScreen->tex.map) != 0) {
 101          intelUnmapScreenRegions(intelScreen);
 102          return GL_FALSE;
 103       }
 104    }
 105
 106    return GL_TRUE;
 107 }
 108
 109 void
 110 intelUnmapScreenRegions(intelScreenPrivate * intelScreen)
 111 {
 112    if (intelScreen->tex.map) {
 113       drmUnmap(intelScreen->tex.map, intelScreen->tex.size);
 114       intelScreen->tex.map = NULL;
 115    }
 116 }
 117
 118
 119 static void
 120 intelPrintDRIInfo(intelScreenPrivate * intelScreen,
 121                   __DRIscreenPrivate * sPriv, I830DRIPtr gDRIPriv)
 122 {
 123    fprintf(stderr, "*** Front size:   0x%x  offset: 0x%x  pitch: %d\n",
 124            intelScreen->front.size, intelScreen->front.offset,
 125            intelScreen->pitch);
 126    fprintf(stderr, "*** Back size:    0x%x  offset: 0x%x  pitch: %d\n",
 127            intelScreen->back.size, intelScreen->back.offset,
 128            intelScreen->pitch);
 129    fprintf(stderr, "*** Depth size:   0x%x  offset: 0x%x  pitch: %d\n",
 130            intelScreen->depth.size, intelScreen->depth.offset,
 131            intelScreen->pitch);
 132    fprintf(stderr, "*** Texture size: 0x%x  offset: 0x%x\n",
 133            intelScreen->tex.size, intelScreen->tex.offset);
 134    fprintf(stderr, "*** Memory : 0x%x\n", gDRIPriv->mem);
 135 }
 136
 137
 138 static void
 139 intelPrintSAREA(const drm_i915_sarea_t * sarea)
 140 {
 141    fprintf(stderr, "SAREA: sarea width %d  height %d\n", sarea->width,
 142            sarea->height);
 143    fprintf(stderr, "SAREA: pitch: %d\n", sarea->pitch);
 144    fprintf(stderr,
 145            "SAREA: front offset: 0x%08x  size: 0x%x  handle: 0x%x tiled: %d\n",
 146            sarea->front_offset, sarea->front_size,
 147            (unsigned) sarea->front_handle, sarea->front_tiled);
 148    fprintf(stderr,
 149            "SAREA: back  offset: 0x%08x  size: 0x%x  handle: 0x%x tiled: %d\n",
 150            sarea->back_offset, sarea->back_size,
 151            (unsigned) sarea->back_handle, sarea->back_tiled);
 152    fprintf(stderr, "SAREA: depth offset: 0x%08x  size: 0x%x  handle: 0x%x tiled: %d\n",
 153            sarea->depth_offset, sarea->depth_size,
 154            (unsigned) sarea->depth_handle, sarea->depth_tiled);
 155    fprintf(stderr, "SAREA: tex   offset: 0x%08x  size: 0x%x  handle: 0x%x\n",
 156            sarea->tex_offset, sarea->tex_size, (unsigned) sarea->tex_handle);
 157 }
 158
 159
 160 /**
 161  * A number of the screen parameters are obtained/computed from
 162  * information in the SAREA.  This function updates those parameters.
 163  */
 164 static void
 165 intelUpdateScreenFromSAREA(intelScreenPrivate * intelScreen,
 166                            drm_i915_sarea_t * sarea)
 167 {
 168    intelScreen->width = sarea->width;
 169    intelScreen->height = sarea->height;
 170    intelScreen->pitch = sarea->pitch;
 171
 172    intelScreen->front.offset = sarea->front_offset;
 173    intelScreen->front.handle = sarea->front_handle;
 174    intelScreen->front.size = sarea->front_size;
 175    intelScreen->front.tiled = sarea->front_tiled;
 176
 177    intelScreen->back.offset = sarea->back_offset;
 178    intelScreen->back.handle = sarea->back_handle;
 179    intelScreen->back.size = sarea->back_size;
 180    intelScreen->back.tiled = sarea->back_tiled;
 181
 182    intelScreen->depth.offset = sarea->depth_offset;
 183    intelScreen->depth.handle = sarea->depth_handle;
 184    intelScreen->depth.size = sarea->depth_size;
 185    intelScreen->depth.tiled = sarea->depth_tiled;
 186
 187    if (intelScreen->driScrnPriv->ddx_version.minor >= 9) {
 188       intelScreen->front.bo_handle = sarea->front_bo_handle;
 189       intelScreen->back.bo_handle = sarea->back_bo_handle;
 190       intelScreen->depth.bo_handle = sarea->depth_bo_handle;
 191    } else {
 192       intelScreen->front.bo_handle = -1;
 193       intelScreen->back.bo_handle = -1;
 194       intelScreen->depth.bo_handle = -1;
 195    }
 196
 197    intelScreen->tex.offset = sarea->tex_offset;
 198    intelScreen->logTextureGranularity = sarea->log_tex_granularity;
 199    intelScreen->tex.handle = sarea->tex_handle;
 200    intelScreen->tex.size = sarea->tex_size;
 201
 202    if (0)
 203       intelPrintSAREA(sarea);
 204 }
 205
 206 static const __DRItexOffsetExtension intelTexOffsetExtension = {
 207    { __DRI_TEX_OFFSET },
 208    intelSetTexOffset,
 209 };
 210
 211 static const __DRItexBufferExtension intelTexBufferExtension = {
 212     { __DRI_TEX_BUFFER, __DRI_TEX_BUFFER_VERSION },
 213    intelSetTexBuffer,
 214    intelSetTexBuffer2,
 215 };
 216
 217 static const __DRIextension *intelScreenExtensions[] = {
 218     &driReadDrawableExtension,
 219     &driCopySubBufferExtension.base,
 220     &driSwapControlExtension.base,
 221     &driFrameTrackingExtension.base,
 222     &driMediaStreamCounterExtension.base,
 223     &intelTexOffsetExtension.base,
 224     &intelTexBufferExtension.base,
 225     NULL
 226 };
 227
 228 static GLboolean
 229 intel_get_param(__DRIscreenPrivate *psp, int param, int *value)
 230 {
 231    int ret;
 232    struct drm_i915_getparam gp;
 233
 234    gp.param = param;
 235    gp.value = value;
 236
 237    ret = drmCommandWriteRead(psp->fd, DRM_I915_GETPARAM, &gp, sizeof(gp));
 238    if (ret) {
 239       fprintf(stderr, "drm_i915_getparam: %d\n", ret);
 240       return GL_FALSE;
 241    }
 242
 243    return GL_TRUE;
 244 }
 245
 246 static GLboolean intelInitDriver(__DRIscreenPrivate *sPriv)
 247 {
 248    intelScreenPrivate *intelScreen;
 249    I830DRIPtr gDRIPriv = (I830DRIPtr) sPriv->pDevPriv;
 250    drm_i915_sarea_t *sarea;
 251
 252    if (sPriv->devPrivSize != sizeof(I830DRIRec)) {
 253       fprintf(stderr,
 254               "\nERROR!  sizeof(I830DRIRec) does not match passed size from device driver\n");
 255       return GL_FALSE;
 256    }
 257
 258    /* Allocate the private area */
 259    intelScreen = (intelScreenPrivate *) CALLOC(sizeof(intelScreenPrivate));
 260    if (!intelScreen) {
 261       fprintf(stderr, "\nERROR!  Allocating private area failed\n");
 262       return GL_FALSE;
 263    }
 264    /* parse information in __driConfigOptions */
 265    driParseOptionInfo(&intelScreen->optionCache,
 266                       __driConfigOptions, __driNConfigOptions);
 267
 268    intelScreen->driScrnPriv = sPriv;
 269    sPriv->private = (void *) intelScreen;
 270    sarea = (drm_i915_sarea_t *)
 271       (((GLubyte *) sPriv->pSAREA) + gDRIPriv->sarea_priv_offset);
 272    intelScreen->sarea = sarea;
 273
 274    intelScreen->deviceID = gDRIPriv->deviceID;
 275
 276    intelUpdateScreenFromSAREA(intelScreen, sarea);
 277
 278    if (!intelMapScreenRegions(sPriv)) {
 279       fprintf(stderr, "\nERROR!  mapping regions\n");
 280       _mesa_free(intelScreen);
 281       sPriv->private = NULL;
 282       return GL_FALSE;
 283    }
 284
 285    if (0)
 286       intelPrintDRIInfo(intelScreen, sPriv, gDRIPriv);
 287
 288    intelScreen->drmMinor = sPriv->drm_version.minor;
 289
 290    /* Determine if IRQs are active? */
 291    if (!intel_get_param(sPriv, I915_PARAM_IRQ_ACTIVE,
 292                         &intelScreen->irq_active))
 293       return GL_FALSE;
 294
 295    sPriv->extensions = intelScreenExtensions;
 296
 297    return GL_TRUE;
 298 }
 299
 300
 301 static void
 302 intelDestroyScreen(__DRIscreenPrivate * sPriv)
 303 {
 304    intelScreenPrivate *intelScreen = (intelScreenPrivate *) sPriv->private;
 305
 306    dri_bufmgr_destroy(intelScreen->bufmgr);
 307    intelUnmapScreenRegions(intelScreen);
 308    driDestroyOptionCache(&intelScreen->optionCache);
 309
 310    FREE(intelScreen);
 311    sPriv->private = NULL;
 312 }
 313
 314
 315 /**
 316  * This is called when we need to set up GL rendering to a new X window.
 317  */
 318 static GLboolean
 319 intelCreateBuffer(__DRIscreenPrivate * driScrnPriv,
 320                   __DRIdrawablePrivate * driDrawPriv,
 321                   const __GLcontextModes * mesaVis, GLboolean isPixmap)
 322 {
 323    if (isPixmap) {
 324       return GL_FALSE;          /* not implemented */
 325    }
 326    else {
 327       GLboolean swStencil = (mesaVis->stencilBits > 0 &&
 328                              mesaVis->depthBits != 24);
 329       GLenum rgbFormat;
 330
 331       struct intel_framebuffer *intel_fb = CALLOC_STRUCT(intel_framebuffer);
 332
 333       if (!intel_fb)
 334          return GL_FALSE;
 335
 336       _mesa_initialize_framebuffer(&intel_fb->Base, mesaVis);
 337
 338       if (mesaVis->redBits == 5)
 339          rgbFormat = GL_RGB5;
 340       else if (mesaVis->alphaBits == 0)
 341          rgbFormat = GL_RGB8;
 342       else
 343          rgbFormat = GL_RGBA8;
 344
 345       /* setup the hardware-based renderbuffers */
 346       intel_fb->color_rb[0] = intel_create_renderbuffer(rgbFormat);
 347       _mesa_add_renderbuffer(&intel_fb->Base, BUFFER_FRONT_LEFT,
 348                              &intel_fb->color_rb[0]->Base);
 349
 350       if (mesaVis->doubleBufferMode) {
 351          intel_fb->color_rb[1] = intel_create_renderbuffer(rgbFormat);
 352
 353          _mesa_add_renderbuffer(&intel_fb->Base, BUFFER_BACK_LEFT,
 354                                 &intel_fb->color_rb[1]->Base);
 355
 356       }
 357
 358       if (mesaVis->depthBits == 24) {
 359          if (mesaVis->stencilBits == 8) {
 360             /* combined depth/stencil buffer */
 361             struct intel_renderbuffer *depthStencilRb
 362                = intel_create_renderbuffer(GL_DEPTH24_STENCIL8_EXT);
 363             /* note: bind RB to two attachment points */
 364             _mesa_add_renderbuffer(&intel_fb->Base, BUFFER_DEPTH,
 365                                    &depthStencilRb->Base);
 366             _mesa_add_renderbuffer(&intel_fb->Base, BUFFER_STENCIL,
 367                                    &depthStencilRb->Base);
 368          } else {
 369             struct intel_renderbuffer *depthRb
 370                = intel_create_renderbuffer(GL_DEPTH_COMPONENT24);
 371             _mesa_add_renderbuffer(&intel_fb->Base, BUFFER_DEPTH,
 372                                    &depthRb->Base);
 373          }
 374       }
 375       else if (mesaVis->depthBits == 16) {
 376          /* just 16-bit depth buffer, no hw stencil */
 377          struct intel_renderbuffer *depthRb
 378             = intel_create_renderbuffer(GL_DEPTH_COMPONENT16);
 379          _mesa_add_renderbuffer(&intel_fb->Base, BUFFER_DEPTH, &depthRb->Base);
 380       }
 381
 382       /* now add any/all software-based renderbuffers we may need */
 383       _mesa_add_soft_renderbuffers(&intel_fb->Base,
 384                                    GL_FALSE, /* never sw color */
 385                                    GL_FALSE, /* never sw depth */
 386                                    swStencil, mesaVis->accumRedBits > 0,
 387                                    GL_FALSE, /* never sw alpha */
 388                                    GL_FALSE  /* never sw aux */ );
 389       driDrawPriv->driverPrivate = (void *) intel_fb;
 390
 391       return GL_TRUE;
 392    }
 393 }
 394
 395 static void
 396 intelDestroyBuffer(__DRIdrawablePrivate * driDrawPriv)
 397 {
 398    _mesa_reference_framebuffer((GLframebuffer **)(&(driDrawPriv->driverPrivate)), NULL);
 399 }
 400
 401
 402 /**
 403  * Get information about previous buffer swaps.
 404  */
 405 static int
 406 intelGetSwapInfo(__DRIdrawablePrivate * dPriv, __DRIswapInfo * sInfo)
 407 {
 408    struct intel_framebuffer *intel_fb;
 409
 410    if ((dPriv == NULL) || (dPriv->driverPrivate == NULL)
 411        || (sInfo == NULL)) {
 412       return -1;
 413    }
 414
 415    intel_fb = dPriv->driverPrivate;
 416    sInfo->swap_count = intel_fb->swap_count;
 417    sInfo->swap_ust = intel_fb->swap_ust;
 418    sInfo->swap_missed_count = intel_fb->swap_missed_count;
 419
 420    sInfo->swap_missed_usage = (sInfo->swap_missed_count != 0)
 421       ? driCalculateSwapUsage(dPriv, 0, intel_fb->swap_missed_ust)
 422       : 0.0;
 423
 424    return 0;
 425 }
 426
 427
 428 /* There are probably better ways to do this, such as an
 429  * init-designated function to register chipids and createcontext
 430  * functions.
 431  */
 432 extern GLboolean i830CreateContext(const __GLcontextModes * mesaVis,
 433                                    __DRIcontextPrivate * driContextPriv,
 434                                    void *sharedContextPrivate);
 435
 436 extern GLboolean i915CreateContext(const __GLcontextModes * mesaVis,
 437                                    __DRIcontextPrivate * driContextPriv,
 438                                    void *sharedContextPrivate);
 439 extern GLboolean brwCreateContext(const __GLcontextModes * mesaVis,
 440                                   __DRIcontextPrivate * driContextPriv,
 441                                   void *sharedContextPrivate);
 442
 443 static GLboolean
 444 intelCreateContext(const __GLcontextModes * mesaVis,
 445                    __DRIcontextPrivate * driContextPriv,
 446                    void *sharedContextPrivate)
 447 {
 448    __DRIscreenPrivate *sPriv = driContextPriv->driScreenPriv;
 449    intelScreenPrivate *intelScreen = (intelScreenPrivate *) sPriv->private;
 450
 451 #ifdef I915
 452    if (IS_9XX(intelScreen->deviceID)) {
 453       if (!IS_965(intelScreen->deviceID)) {
 454          return i915CreateContext(mesaVis, driContextPriv,
 455                                   sharedContextPrivate);
 456       }
 457    } else {
 458       intelScreen->no_vbo = GL_TRUE;
 459       return i830CreateContext(mesaVis, driContextPriv, sharedContextPrivate);
 460    }
 461 #else
 462    if (IS_965(intelScreen->deviceID))
 463       return brwCreateContext(mesaVis, driContextPriv, sharedContextPrivate);
 464 #endif
 465    fprintf(stderr, "Unrecognized deviceID %x\n", intelScreen->deviceID);
 466    return GL_FALSE;
 467 }
 468
 469
 470 static __DRIconfig **
 471 intelFillInModes(__DRIscreenPrivate *psp,
 472                  unsigned pixel_bits, unsigned depth_bits,
 473                  unsigned stencil_bits, GLboolean have_back_buffer)
 474 {
 475    __DRIconfig **configs;
 476    __GLcontextModes *m;
 477    unsigned depth_buffer_factor;
 478    unsigned back_buffer_factor;
 479    int i;
 480
 481    /* GLX_SWAP_COPY_OML is only supported because the Intel driver doesn't
 482     * support pageflipping at all.
 483     */
 484    static const GLenum back_buffer_modes[] = {
 485       GLX_NONE, GLX_SWAP_UNDEFINED_OML, GLX_SWAP_COPY_OML
 486    };
 487
 488    uint8_t depth_bits_array[3];
 489    uint8_t stencil_bits_array[3];
 490    uint8_t msaa_samples_array[1];
 491
 492    depth_bits_array[0] = 0;
 493    depth_bits_array[1] = depth_bits;
 494    depth_bits_array[2] = depth_bits;
 495
 496    /* Just like with the accumulation buffer, always provide some modes
 497     * with a stencil buffer.  It will be a sw fallback, but some apps won't
 498     * care about that.
 499     */
 500    stencil_bits_array[0] = 0;
 501    stencil_bits_array[1] = 0;
 502    if (depth_bits == 24)
 503       stencil_bits_array[1] = (stencil_bits == 0) ? 8 : stencil_bits;
 504
 505    stencil_bits_array[2] = (stencil_bits == 0) ? 8 : stencil_bits;
 506
 507    msaa_samples_array[0] = 0;
 508
 509    depth_buffer_factor = ((depth_bits != 0) || (stencil_bits != 0)) ? 3 : 1;
 510    back_buffer_factor = (have_back_buffer) ? 3 : 1;
 511
 512    if (pixel_bits == 16) {
 513       configs = driCreateConfigs(GL_RGB, GL_UNSIGNED_SHORT_5_6_5,
 514                                  depth_bits_array, stencil_bits_array,
 515                                  depth_buffer_factor, back_buffer_modes,
 516                                  back_buffer_factor,
 517                                  msaa_samples_array, 1);
 518    }
 519    else {
 520       __DRIconfig **configs_a8r8g8b8;
 521       __DRIconfig **configs_x8r8g8b8;
 522
 523       configs_a8r8g8b8 = driCreateConfigs(GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV,
 524                                           depth_bits_array,
 525                                           stencil_bits_array,
 526                                           depth_buffer_factor,
 527                                           back_buffer_modes,
 528                                           back_buffer_factor,
 529                                           msaa_samples_array, 1);
 530       configs_x8r8g8b8 = driCreateConfigs(GL_BGR, GL_UNSIGNED_INT_8_8_8_8_REV,
 531                                           depth_bits_array,
 532                                           stencil_bits_array,
 533                                           depth_buffer_factor,
 534                                           back_buffer_modes,
 535                                           back_buffer_factor,
 536                                           msaa_samples_array, 1);
 537       configs = driConcatConfigs(configs_a8r8g8b8, configs_x8r8g8b8);
 538    }
 539
 540    if (configs == NULL) {
 541     fprintf(stderr, "[%s:%u] Error creating FBConfig!\n", __func__,
 542               __LINE__);
 543       return NULL;
 544    }
 545
 546    /* Mark the visual as slow if there are "fake" stencil bits.
 547     */
 548    for (i = 0; configs[i]; i++) {
 549       m = &configs[i]->modes;
 550       if ((m->stencilBits != 0) && (m->stencilBits != stencil_bits)) {
 551          m->visualRating = GLX_SLOW_CONFIG;
 552       }
 553    }
 554
 555    return configs;
 556 }
 557
 558 static GLboolean
 559 intel_init_bufmgr(intelScreenPrivate *intelScreen)
 560 {
 561    GLboolean gem_disable = getenv("INTEL_NO_GEM") != NULL;
 562    int gem_kernel = 0;
 563    GLboolean gem_supported;
 564    struct drm_i915_getparam gp;
 565    __DRIscreenPrivate *spriv = intelScreen->driScrnPriv;
 566
 567    intelScreen->no_hw = getenv("INTEL_NO_HW") != NULL;
 568
 569    gp.param = I915_PARAM_HAS_GEM;
 570    gp.value = &gem_kernel;
 571
 572    (void) drmCommandWriteRead(spriv->fd, DRM_I915_GETPARAM, &gp, sizeof(gp));
 573
 574    /* If we've got a new enough DDX that's initializing GEM and giving us
 575     * object handles for the shared buffers, use that.
 576     */
 577    intelScreen->ttm = GL_FALSE;
 578    if (intelScreen->driScrnPriv->dri2.enabled)
 579        gem_supported = GL_TRUE;
 580    else if (intelScreen->driScrnPriv->ddx_version.minor >= 9 &&
 581             gem_kernel &&
 582             intelScreen->front.bo_handle != -1)
 583        gem_supported = GL_TRUE;
 584    else
 585        gem_supported = GL_FALSE;
 586
 587    if (!gem_disable && gem_supported) {
 588       intelScreen->bufmgr = intel_bufmgr_gem_init(spriv->fd, BATCH_SZ);
 589       if (intelScreen->bufmgr != NULL)
 590          intelScreen->ttm = GL_TRUE;
 591    }
 592    /* Otherwise, use the classic buffer manager. */
 593    if (intelScreen->bufmgr == NULL) {
 594       if (gem_disable) {
 595          fprintf(stderr, "GEM disabled.  Using classic.\n");
 596       } else {
 597          fprintf(stderr, "Failed to initialize GEM.  "
 598                  "Falling back to classic.\n");
 599       }
 600
 601       if (intelScreen->tex.size == 0) {
 602          fprintf(stderr, "[%s:%u] Error initializing buffer manager.\n",
 603                  __func__, __LINE__);
 604          return GL_FALSE;
 605       }
 606
 607       intelScreen->bufmgr =
 608          intel_bufmgr_fake_init(spriv->fd,
 609                                 intelScreen->tex.offset,
 610                                 intelScreen->tex.map,
 611                                 intelScreen->tex.size,
 612                                 (unsigned int * volatile)
 613                                 &intelScreen->sarea->last_dispatch);
 614    }
 615
 616    return GL_TRUE;
 617 }
 618
 619 /**
 620  * This is the driver specific part of the createNewScreen entry point.
 621  * Called when using legacy DRI.
 622  *
 623  * \todo maybe fold this into intelInitDriver
 624  *
 625  * \return the __GLcontextModes supported by this driver
 626  */
 627 static const __DRIconfig **intelInitScreen(__DRIscreenPrivate *psp)
 628 {
 629    intelScreenPrivate *intelScreen;
 630 #ifdef I915
 631    static const __DRIversion ddx_expected = { 1, 5, 0 };
 632 #else
 633    static const __DRIversion ddx_expected = { 1, 6, 0 };
 634 #endif
 635    static const __DRIversion dri_expected = { 4, 0, 0 };
 636    static const __DRIversion drm_expected = { 1, 5, 0 };
 637    I830DRIPtr dri_priv = (I830DRIPtr) psp->pDevPriv;
 638
 639    if (!driCheckDriDdxDrmVersions2("i915",
 640                                    &psp->dri_version, &dri_expected,
 641                                    &psp->ddx_version, &ddx_expected,
 642                                    &psp->drm_version, &drm_expected)) {
 643       return NULL;
 644    }
 645
 646    /* Calling driInitExtensions here, with a NULL context pointer,
 647     * does not actually enable the extensions.  It just makes sure
 648     * that all the dispatch offsets for all the extensions that
 649     * *might* be enables are known.  This is needed because the
 650     * dispatch offsets need to be known when _mesa_context_create is
 651     * called, but we can't enable the extensions until we have a
 652     * context pointer.
 653     *
 654     * Hello chicken.  Hello egg.  How are you two today?
 655     */
 656    intelInitExtensions(NULL, GL_TRUE);
 657
 658    if (!intelInitDriver(psp))
 659        return NULL;
 660
 661    psp->extensions = intelScreenExtensions;
 662
 663    intelScreen = psp->private;
 664    if (!intel_init_bufmgr(intelScreen))
 665        return GL_FALSE;
 666
 667    return (const __DRIconfig **)
 668        intelFillInModes(psp, dri_priv->cpp * 8,
 669                         (dri_priv->cpp == 2) ? 16 : 24,
 670                         (dri_priv->cpp == 2) ? 0  : 8, 1);
 671 }
 672
 673 struct intel_context *intelScreenContext(intelScreenPrivate *intelScreen)
 674 {
 675   /*
 676    * This should probably change to have the screen allocate a dummy
 677    * context at screen creation. For now just use the current context.
 678    */
 679
 680   GET_CURRENT_CONTEXT(ctx);
 681   if (ctx == NULL) {
 682      _mesa_problem(NULL, "No current context in intelScreenContext\n");
 683      return NULL;
 684   }
 685   return intel_context(ctx);
 686 }
 687
 688 /**
 689  * This is the driver specific part of the createNewScreen entry point.
 690  * Called when using DRI2.
 691  *
 692  * \return the __GLcontextModes supported by this driver
 693  */
 694 static const
 695 __DRIconfig **intelInitScreen2(__DRIscreenPrivate *psp)
 696 {
 697    intelScreenPrivate *intelScreen;
 698    GLenum fb_format[3];
 699    GLenum fb_type[3];
 700    /* GLX_SWAP_COPY_OML is only supported because the Intel driver doesn't
 701     * support pageflipping at all.
 702     */
 703    static const GLenum back_buffer_modes[] = {
 704       GLX_NONE, GLX_SWAP_UNDEFINED_OML, GLX_SWAP_COPY_OML
 705    };
 706    uint8_t depth_bits[4], stencil_bits[4], msaa_samples_array[1];
 707    int color;
 708    __DRIconfig **configs = NULL;
 709
 710    /* Calling driInitExtensions here, with a NULL context pointer,
 711     * does not actually enable the extensions.  It just makes sure
 712     * that all the dispatch offsets for all the extensions that
 713     * *might* be enables are known.  This is needed because the
 714     * dispatch offsets need to be known when _mesa_context_create is
 715     * called, but we can't enable the extensions until we have a
 716     * context pointer.
 717     *
 718     * Hello chicken.  Hello egg.  How are you two today?
 719     */
 720    intelInitExtensions(NULL, GL_TRUE);
 721
 722    /* Allocate the private area */
 723    intelScreen = (intelScreenPrivate *) CALLOC(sizeof(intelScreenPrivate));
 724    if (!intelScreen) {
 725       fprintf(stderr, "\nERROR!  Allocating private area failed\n");
 726       return GL_FALSE;
 727    }
 728    /* parse information in __driConfigOptions */
 729    driParseOptionInfo(&intelScreen->optionCache,
 730                       __driConfigOptions, __driNConfigOptions);
 731
 732    intelScreen->driScrnPriv = psp;
 733    psp->private = (void *) intelScreen;
 734
 735    intelScreen->drmMinor = psp->drm_version.minor;
 736
 737    /* Determine chipset ID */
 738    if (!intel_get_param(psp, I915_PARAM_CHIPSET_ID,
 739                         &intelScreen->deviceID))
 740       return GL_FALSE;
 741
 742    if (!intel_init_bufmgr(intelScreen))
 743        return GL_FALSE;
 744
 745    intelScreen->irq_active = 1;
 746    psp->extensions = intelScreenExtensions;
 747
 748    depth_bits[0] = 0;
 749    stencil_bits[0] = 0;
 750    depth_bits[1] = 16;
 751    stencil_bits[1] = 0;
 752    depth_bits[2] = 24;
 753    stencil_bits[2] = 0;
 754    depth_bits[3] = 24;
 755    stencil_bits[3] = 8;
 756
 757    msaa_samples_array[0] = 0;
 758
 759    fb_format[0] = GL_RGB;
 760    fb_type[0] = GL_UNSIGNED_SHORT_5_6_5;
 761
 762    fb_format[1] = GL_BGR;
 763    fb_type[1] = GL_UNSIGNED_INT_8_8_8_8_REV;
 764
 765    fb_format[2] = GL_BGRA;
 766    fb_type[2] = GL_UNSIGNED_INT_8_8_8_8_REV;
 767
 768    depth_bits[0] = 0;
 769    stencil_bits[0] = 0;
 770
 771    for (color = 0; color < ARRAY_SIZE(fb_format); color++) {
 772       __DRIconfig **new_configs;
 773       int depth_factor;
 774
 775       /* With DRI2 right now, GetBuffers always returns a depth/stencil buffer
 776        * with the same cpp as the drawable.  So we can't support depth cpp !=
 777        * color cpp currently.
 778        */
 779       if (fb_type[color] == GL_UNSIGNED_SHORT_5_6_5) {
 780          depth_bits[1] = 16;
 781          stencil_bits[1] = 0;
 782
 783          depth_factor = 2;
 784       } else {
 785          depth_bits[1] = 24;
 786          stencil_bits[1] = 0;
 787          depth_bits[2] = 24;
 788          stencil_bits[2] = 8;
 789
 790          depth_factor = 3;
 791       }
 792       new_configs = driCreateConfigs(fb_format[color], fb_type[color],
 793                                      depth_bits,
 794                                      stencil_bits,
 795                                      depth_factor,
 796                                      back_buffer_modes,
 797                                      ARRAY_SIZE(back_buffer_modes),
 798                                      msaa_samples_array,
 799                                      ARRAY_SIZE(msaa_samples_array));
 800       if (configs == NULL)
 801          configs = new_configs;
 802       else
 803          configs = driConcatConfigs(configs, new_configs);
 804    }
 805
 806    if (configs == NULL) {
 807       fprintf(stderr, "[%s:%u] Error creating FBConfig!\n", __func__,
 808               __LINE__);
 809       return NULL;
 810    }
 811
 812    return (const __DRIconfig **)configs;
 813 }
 814
 815 const struct __DriverAPIRec driDriverAPI = {
 816    .InitScreen           = intelInitScreen,
 817    .DestroyScreen        = intelDestroyScreen,
 818    .CreateContext        = intelCreateContext,
 819    .DestroyContext       = intelDestroyContext,
 820    .CreateBuffer         = intelCreateBuffer,
 821    .DestroyBuffer        = intelDestroyBuffer,
 822    .SwapBuffers          = intelSwapBuffers,
 823    .MakeCurrent          = intelMakeCurrent,
 824    .UnbindContext        = intelUnbindContext,
 825    .GetSwapInfo          = intelGetSwapInfo,
 826    .GetDrawableMSC       = driDrawableGetMSC32,
 827    .WaitForMSC           = driWaitForMSC32,
 828    .CopySubBuffer        = intelCopySubBuffer,
 829
 830    .InitScreen2          = intelInitScreen2,
 831 };