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 <errno.h>
  29 #include "main/glheader.h"
  30 #include "main/context.h"
  31 #include "main/framebuffer.h"
  32 #include "main/renderbuffer.h"
  33 #include "main/hash.h"
  34 #include "main/fbobject.h"
  35 #include "main/mfeatures.h"
  36
  37 #include "utils.h"
  38 #include "xmlpool.h"
  39
  40 PUBLIC const char __driConfigOptions[] =
  41    DRI_CONF_BEGIN
  42    DRI_CONF_SECTION_PERFORMANCE
  43       DRI_CONF_VBLANK_MODE(DRI_CONF_VBLANK_ALWAYS_SYNC)
  44       /* Options correspond to DRI_CONF_BO_REUSE_DISABLED,
  45        * DRI_CONF_BO_REUSE_ALL
  46        */
  47       DRI_CONF_OPT_BEGIN_V(bo_reuse, enum, 1, "0:1")
  48          DRI_CONF_DESC_BEGIN(en, "Buffer object reuse")
  49             DRI_CONF_ENUM(0, "Disable buffer object reuse")
  50             DRI_CONF_ENUM(1, "Enable reuse of all sizes of buffer objects")
  51          DRI_CONF_DESC_END
  52       DRI_CONF_OPT_END
  53
  54       DRI_CONF_OPT_BEGIN(texture_tiling, bool, true)
  55          DRI_CONF_DESC(en, "Enable texture tiling")
  56       DRI_CONF_OPT_END
  57
  58       DRI_CONF_OPT_BEGIN(early_z, bool, false)
  59          DRI_CONF_DESC(en, "Enable early Z in classic mode (unstable, 945-only).")
  60       DRI_CONF_OPT_END
  61
  62       DRI_CONF_OPT_BEGIN(fragment_shader, bool, true)
  63          DRI_CONF_DESC(en, "Enable limited ARB_fragment_shader support on 915/945.")
  64       DRI_CONF_OPT_END
  65
  66    DRI_CONF_SECTION_END
  67    DRI_CONF_SECTION_QUALITY
  68       DRI_CONF_FORCE_S3TC_ENABLE(false)
  69       DRI_CONF_ALLOW_LARGE_TEXTURES(2)
  70    DRI_CONF_SECTION_END
  71    DRI_CONF_SECTION_DEBUG
  72      DRI_CONF_NO_RAST(false)
  73      DRI_CONF_ALWAYS_FLUSH_BATCH(false)
  74      DRI_CONF_ALWAYS_FLUSH_CACHE(false)
  75
  76       DRI_CONF_OPT_BEGIN(stub_occlusion_query, bool, false)
  77          DRI_CONF_DESC(en, "Enable stub ARB_occlusion_query support on 915/945.")
  78       DRI_CONF_OPT_END
  79    DRI_CONF_SECTION_END
  80 DRI_CONF_END;
  81
  82 const GLuint __driNConfigOptions = 11;
  83
  84 #include "intel_batchbuffer.h"
  85 #include "intel_buffers.h"
  86 #include "intel_bufmgr.h"
  87 #include "intel_chipset.h"
  88 #include "intel_fbo.h"
  89 #include "intel_mipmap_tree.h"
  90 #include "intel_screen.h"
  91 #include "intel_tex.h"
  92 #include "intel_regions.h"
  93
  94 #include "i915_drm.h"
  95
  96 #ifdef USE_NEW_INTERFACE
  97 static PFNGLXCREATECONTEXTMODES create_context_modes = NULL;
  98 #endif /*USE_NEW_INTERFACE */
  99
 100 static const __DRItexBufferExtension intelTexBufferExtension = {
 101     { __DRI_TEX_BUFFER, __DRI_TEX_BUFFER_VERSION },
 102    intelSetTexBuffer,
 103    intelSetTexBuffer2,
 104 };
 105
 106 static void
 107 intelDRI2Flush(__DRIdrawable *drawable)
 108 {
 109    GET_CURRENT_CONTEXT(ctx);
 110    struct intel_context *intel = intel_context(ctx);
 111
 112    if (intel->gen < 4)
 113       INTEL_FIREVERTICES(intel);
 114
 115    intel->need_throttle = true;
 116
 117    if (intel->batch.used)
 118       intel_batchbuffer_flush(intel);
 119 }
 120
 121 static const struct __DRI2flushExtensionRec intelFlushExtension = {
 122     { __DRI2_FLUSH, __DRI2_FLUSH_VERSION },
 123     intelDRI2Flush,
 124     dri2InvalidateDrawable,
 125 };
 126
 127 static __DRIimage *
 128 intel_create_image_from_name(__DRIscreen *screen,
 129                              int width, int height, int format,
 130                              int name, int pitch, void *loaderPrivate)
 131 {
 132     struct intel_screen *intelScreen = screen->driverPrivate;
 133     __DRIimage *image;
 134     int cpp;
 135
 136     image = CALLOC(sizeof *image);
 137     if (image == NULL)
 138         return NULL;
 139
 140     switch (format) {
 141     case __DRI_IMAGE_FORMAT_RGB565:
 142        image->format = MESA_FORMAT_RGB565;
 143        image->internal_format = GL_RGB;
 144        image->data_type = GL_UNSIGNED_BYTE;
 145        break;
 146     case __DRI_IMAGE_FORMAT_XRGB8888:
 147        image->format = MESA_FORMAT_XRGB8888;
 148        image->internal_format = GL_RGB;
 149        image->data_type = GL_UNSIGNED_BYTE;
 150        break;
 151     case __DRI_IMAGE_FORMAT_ARGB8888:
 152        image->format = MESA_FORMAT_ARGB8888;
 153        image->internal_format = GL_RGBA;
 154        image->data_type = GL_UNSIGNED_BYTE;
 155        break;
 156     case __DRI_IMAGE_FORMAT_ABGR8888:
 157        image->format = MESA_FORMAT_RGBA8888_REV;
 158        image->internal_format = GL_RGBA;
 159        image->data_type = GL_UNSIGNED_BYTE;
 160        break;
 161     default:
 162        free(image);
 163        return NULL;
 164     }
 165
 166     image->data = loaderPrivate;
 167     cpp = _mesa_get_format_bytes(image->format);
 168
 169     image->region = intel_region_alloc_for_handle(intelScreen,
 170                                                   cpp, width, height,
 171                                                   pitch, name, "image");
 172     if (image->region == NULL) {
 173        FREE(image);
 174        return NULL;
 175     }
 176
 177     return image;
 178 }
 179
 180 static __DRIimage *
 181 intel_create_image_from_renderbuffer(__DRIcontext *context,
 182                                      int renderbuffer, void *loaderPrivate)
 183 {
 184    __DRIimage *image;
 185    struct intel_context *intel = context->driverPrivate;
 186    struct gl_renderbuffer *rb;
 187    struct intel_renderbuffer *irb;
 188
 189    rb = _mesa_lookup_renderbuffer(&intel->ctx, renderbuffer);
 190    if (!rb) {
 191       _mesa_error(&intel->ctx,
 192                   GL_INVALID_OPERATION, "glRenderbufferExternalMESA");
 193       return NULL;
 194    }
 195
 196    irb = intel_renderbuffer(rb);
 197    image = CALLOC(sizeof *image);
 198    if (image == NULL)
 199       return NULL;
 200
 201    image->internal_format = rb->InternalFormat;
 202    image->format = rb->Format;
 203    image->data_type = rb->DataType;
 204    image->data = loaderPrivate;
 205    intel_region_reference(&image->region, irb->mt->region);
 206
 207    return image;
 208 }
 209
 210 static void
 211 intel_destroy_image(__DRIimage *image)
 212 {
 213     intel_region_release(&image->region);
 214     FREE(image);
 215 }
 216
 217 static __DRIimage *
 218 intel_create_image(__DRIscreen *screen,
 219                    int width, int height, int format,
 220                    unsigned int use,
 221                    void *loaderPrivate)
 222 {
 223    __DRIimage *image;
 224    struct intel_screen *intelScreen = screen->driverPrivate;
 225    uint32_t tiling;
 226    int cpp;
 227
 228    tiling = I915_TILING_X;
 229    if (use & __DRI_IMAGE_USE_CURSOR) {
 230       if (width != 64 || height != 64)
 231          return NULL;
 232       tiling = I915_TILING_NONE;
 233    }
 234
 235    image = CALLOC(sizeof *image);
 236    if (image == NULL)
 237       return NULL;
 238
 239    switch (format) {
 240    case __DRI_IMAGE_FORMAT_RGB565:
 241       image->format = MESA_FORMAT_RGB565;
 242       image->internal_format = GL_RGB;
 243       image->data_type = GL_UNSIGNED_BYTE;
 244       break;
 245    case __DRI_IMAGE_FORMAT_XRGB8888:
 246       image->format = MESA_FORMAT_XRGB8888;
 247       image->internal_format = GL_RGB;
 248       image->data_type = GL_UNSIGNED_BYTE;
 249       break;
 250    case __DRI_IMAGE_FORMAT_ARGB8888:
 251       image->format = MESA_FORMAT_ARGB8888;
 252       image->internal_format = GL_RGBA;
 253       image->data_type = GL_UNSIGNED_BYTE;
 254       break;
 255     case __DRI_IMAGE_FORMAT_ABGR8888:
 256        image->format = MESA_FORMAT_RGBA8888_REV;
 257        image->internal_format = GL_RGBA;
 258        image->data_type = GL_UNSIGNED_BYTE;
 259        break;
 260    default:
 261       free(image);
 262       return NULL;
 263    }
 264
 265    image->data = loaderPrivate;
 266    cpp = _mesa_get_format_bytes(image->format);
 267
 268    image->region =
 269       intel_region_alloc(intelScreen, tiling,
 270                          cpp, width, height, true);
 271    if (image->region == NULL) {
 272       FREE(image);
 273       return NULL;
 274    }
 275
 276    return image;
 277 }
 278
 279 static GLboolean
 280 intel_query_image(__DRIimage *image, int attrib, int *value)
 281 {
 282    switch (attrib) {
 283    case __DRI_IMAGE_ATTRIB_STRIDE:
 284       *value = image->region->pitch * image->region->cpp;
 285       return true;
 286    case __DRI_IMAGE_ATTRIB_HANDLE:
 287       *value = image->region->bo->handle;
 288       return true;
 289    case __DRI_IMAGE_ATTRIB_NAME:
 290       return intel_region_flink(image->region, (uint32_t *) value);
 291    default:
 292       return false;
 293    }
 294 }
 295
 296 static __DRIimage *
 297 intel_dup_image(__DRIimage *orig_image, void *loaderPrivate)
 298 {
 299    __DRIimage *image;
 300
 301    image = CALLOC(sizeof *image);
 302    if (image == NULL)
 303       return NULL;
 304
 305    intel_region_reference(&image->region, orig_image->region);
 306    if (image->region == NULL) {
 307       FREE(image);
 308       return NULL;
 309    }
 310
 311    image->internal_format = orig_image->internal_format;
 312    image->format          = orig_image->format;
 313    image->data_type       = orig_image->data_type;
 314    image->data            = loaderPrivate;
 315
 316    return image;
 317 }
 318
 319 static struct __DRIimageExtensionRec intelImageExtension = {
 320     { __DRI_IMAGE, __DRI_IMAGE_VERSION },
 321     intel_create_image_from_name,
 322     intel_create_image_from_renderbuffer,
 323     intel_destroy_image,
 324     intel_create_image,
 325     intel_query_image,
 326     intel_dup_image
 327 };
 328
 329 static const __DRIextension *intelScreenExtensions[] = {
 330     &intelTexBufferExtension.base,
 331     &intelFlushExtension.base,
 332     &intelImageExtension.base,
 333     &dri2ConfigQueryExtension.base,
 334     NULL
 335 };
 336
 337 static bool
 338 intel_get_param(__DRIscreen *psp, int param, int *value)
 339 {
 340    int ret;
 341    struct drm_i915_getparam gp;
 342
 343    gp.param = param;
 344    gp.value = value;
 345
 346    ret = drmCommandWriteRead(psp->fd, DRM_I915_GETPARAM, &gp, sizeof(gp));
 347    if (ret) {
 348       if (ret != -EINVAL)
 349          _mesa_warning(NULL, "drm_i915_getparam: %d", ret);
 350       return false;
 351    }
 352
 353    return true;
 354 }
 355
 356 static bool
 357 intel_get_boolean(__DRIscreen *psp, int param)
 358 {
 359    int value = 0;
 360    return intel_get_param(psp, param, &value) && value;
 361 }
 362
 363 static void
 364 nop_callback(GLuint key, void *data, void *userData)
 365 {
 366 }
 367
 368 static void
 369 intelDestroyScreen(__DRIscreen * sPriv)
 370 {
 371    struct intel_screen *intelScreen = sPriv->driverPrivate;
 372
 373    dri_bufmgr_destroy(intelScreen->bufmgr);
 374    driDestroyOptionInfo(&intelScreen->optionCache);
 375
 376    /* Some regions may still have references to them at this point, so
 377     * flush the hash table to prevent _mesa_DeleteHashTable() from
 378     * complaining about the hash not being empty; */
 379    _mesa_HashDeleteAll(intelScreen->named_regions, nop_callback, NULL);
 380    _mesa_DeleteHashTable(intelScreen->named_regions);
 381
 382    FREE(intelScreen);
 383    sPriv->driverPrivate = NULL;
 384 }
 385
 386
 387 /**
 388  * This is called when we need to set up GL rendering to a new X window.
 389  */
 390 static GLboolean
 391 intelCreateBuffer(__DRIscreen * driScrnPriv,
 392                   __DRIdrawable * driDrawPriv,
 393                   const struct gl_config * mesaVis, GLboolean isPixmap)
 394 {
 395    struct intel_renderbuffer *rb;
 396    struct intel_screen *screen = (struct intel_screen*) driScrnPriv->driverPrivate;
 397
 398    if (isPixmap) {
 399       return false;          /* not implemented */
 400    }
 401    else {
 402       gl_format rgbFormat;
 403
 404       struct gl_framebuffer *fb = CALLOC_STRUCT(gl_framebuffer);
 405
 406       if (!fb)
 407          return false;
 408
 409       _mesa_initialize_window_framebuffer(fb, mesaVis);
 410
 411       if (mesaVis->redBits == 5)
 412          rgbFormat = MESA_FORMAT_RGB565;
 413       else if (mesaVis->alphaBits == 0)
 414          rgbFormat = MESA_FORMAT_XRGB8888;
 415       else
 416          rgbFormat = MESA_FORMAT_ARGB8888;
 417
 418       /* setup the hardware-based renderbuffers */
 419       rb = intel_create_renderbuffer(rgbFormat);
 420       _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &rb->Base);
 421
 422       if (mesaVis->doubleBufferMode) {
 423          rb = intel_create_renderbuffer(rgbFormat);
 424          _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &rb->Base);
 425       }
 426
 427       /*
 428        * Assert here that the gl_config has an expected depth/stencil bit
 429        * combination: one of d24/s8, d16/s0, d0/s0. (See intelInitScreen2(),
 430        * which constructs the advertised configs.)
 431        */
 432       if (mesaVis->depthBits == 24) {
 433          assert(mesaVis->stencilBits == 8);
 434
 435          if (screen->hw_has_separate_stencil
 436              && screen->dri2_has_hiz != INTEL_DRI2_HAS_HIZ_FALSE) {
 437             /*
 438              * Request a separate stencil buffer even if we do not yet know if
 439              * the screen supports it. (See comments for
 440              * enum intel_dri2_has_hiz).
 441              */
 442             rb = intel_create_renderbuffer(MESA_FORMAT_X8_Z24);
 443             _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base);
 444             rb = intel_create_renderbuffer(MESA_FORMAT_S8);
 445             _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &rb->Base);
 446          } else {
 447             /*
 448              * Use combined depth/stencil. Note that the renderbuffer is
 449              * attached to two attachment points.
 450              */
 451             rb = intel_create_renderbuffer(MESA_FORMAT_S8_Z24);
 452             _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base);
 453             _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &rb->Base);
 454          }
 455       }
 456       else if (mesaVis->depthBits == 16) {
 457          assert(mesaVis->stencilBits == 0);
 458          /* just 16-bit depth buffer, no hw stencil */
 459          struct intel_renderbuffer *depthRb
 460             = intel_create_renderbuffer(MESA_FORMAT_Z16);
 461          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
 462       }
 463       else {
 464          assert(mesaVis->depthBits == 0);
 465          assert(mesaVis->stencilBits == 0);
 466       }
 467
 468       /* now add any/all software-based renderbuffers we may need */
 469       _mesa_add_soft_renderbuffers(fb,
 470                                    false, /* never sw color */
 471                                    false, /* never sw depth */
 472                                    false, /* never sw stencil */
 473                                    mesaVis->accumRedBits > 0,
 474                                    false, /* never sw alpha */
 475                                    false  /* never sw aux */ );
 476       driDrawPriv->driverPrivate = fb;
 477
 478       return true;
 479    }
 480 }
 481
 482 static void
 483 intelDestroyBuffer(__DRIdrawable * driDrawPriv)
 484 {
 485     struct gl_framebuffer *fb = driDrawPriv->driverPrivate;
 486
 487     _mesa_reference_framebuffer(&fb, NULL);
 488 }
 489
 490 /* There are probably better ways to do this, such as an
 491  * init-designated function to register chipids and createcontext
 492  * functions.
 493  */
 494 extern bool
 495 i830CreateContext(const struct gl_config *mesaVis,
 496                   __DRIcontext *driContextPriv,
 497                   void *sharedContextPrivate);
 498
 499 extern bool
 500 i915CreateContext(int api,
 501                   const struct gl_config *mesaVis,
 502                   __DRIcontext *driContextPriv,
 503                   void *sharedContextPrivate);
 504 extern bool
 505 brwCreateContext(int api,
 506                  const struct gl_config *mesaVis,
 507                  __DRIcontext *driContextPriv,
 508                  void *sharedContextPrivate);
 509
 510 static GLboolean
 511 intelCreateContext(gl_api api,
 512                    const struct gl_config * mesaVis,
 513                    __DRIcontext * driContextPriv,
 514                    void *sharedContextPrivate)
 515 {
 516    __DRIscreen *sPriv = driContextPriv->driScreenPriv;
 517    struct intel_screen *intelScreen = sPriv->driverPrivate;
 518
 519 #ifdef I915
 520    if (IS_9XX(intelScreen->deviceID)) {
 521       if (!IS_965(intelScreen->deviceID)) {
 522          return i915CreateContext(api, mesaVis, driContextPriv,
 523                                   sharedContextPrivate);
 524       }
 525    } else {
 526       intelScreen->no_vbo = true;
 527       return i830CreateContext(mesaVis, driContextPriv, sharedContextPrivate);
 528    }
 529 #else
 530    if (IS_965(intelScreen->deviceID))
 531       return brwCreateContext(api, mesaVis,
 532                               driContextPriv, sharedContextPrivate);
 533 #endif
 534    fprintf(stderr, "Unrecognized deviceID 0x%x\n", intelScreen->deviceID);
 535    return false;
 536 }
 537
 538 static bool
 539 intel_init_bufmgr(struct intel_screen *intelScreen)
 540 {
 541    __DRIscreen *spriv = intelScreen->driScrnPriv;
 542    int num_fences = 0;
 543
 544    intelScreen->no_hw = (getenv("INTEL_NO_HW") != NULL ||
 545                          getenv("INTEL_DEVID_OVERRIDE") != NULL);
 546
 547    intelScreen->bufmgr = intel_bufmgr_gem_init(spriv->fd, BATCH_SZ);
 548    if (intelScreen->bufmgr == NULL) {
 549       fprintf(stderr, "[%s:%u] Error initializing buffer manager.\n",
 550               __func__, __LINE__);
 551       return false;
 552    }
 553
 554    if (!intel_get_param(spriv, I915_PARAM_NUM_FENCES_AVAIL, &num_fences) ||
 555        num_fences == 0) {
 556       fprintf(stderr, "[%s: %u] Kernel 2.6.29 required.\n", __func__, __LINE__);
 557       return false;
 558    }
 559
 560    drm_intel_bufmgr_gem_enable_fenced_relocs(intelScreen->bufmgr);
 561
 562    intelScreen->named_regions = _mesa_NewHashTable();
 563
 564    intelScreen->relaxed_relocations = 0;
 565    intelScreen->relaxed_relocations |=
 566       intel_get_boolean(spriv, I915_PARAM_HAS_RELAXED_DELTA) << 0;
 567
 568    return true;
 569 }
 570
 571 /**
 572  * Override intel_screen.hw_has_hiz with environment variable INTEL_HIZ.
 573  *
 574  * Valid values for INTEL_HIZ are "0" and "1". If an invalid valid value is
 575  * encountered, a warning is emitted and INTEL_HIZ is ignored.
 576  */
 577 static void
 578 intel_override_hiz(struct intel_screen *intel)
 579 {
 580    const char *s = getenv("INTEL_HIZ");
 581    if (!s) {
 582       return;
 583    } else if (!strncmp("0", s, 2)) {
 584       intel->hw_has_hiz = false;
 585    } else if (!strncmp("1", s, 2)) {
 586       intel->hw_has_hiz = true;
 587    } else {
 588       fprintf(stderr,
 589               "warning: env variable INTEL_HIZ=\"%s\" has invalid value "
 590               "and is ignored", s);
 591    }
 592 }
 593
 594 /**
 595  * Override intel_screen.hw_has_separate_stencil with environment variable
 596  * INTEL_SEPARATE_STENCIL.
 597  *
 598  * Valid values for INTEL_SEPARATE_STENCIL are "0" and "1". If an invalid
 599  * valid value is encountered, a warning is emitted and INTEL_SEPARATE_STENCIL
 600  * is ignored.
 601  */
 602 static void
 603 intel_override_separate_stencil(struct intel_screen *screen)
 604 {
 605    const char *s = getenv("INTEL_SEPARATE_STENCIL");
 606    if (!s) {
 607       return;
 608    } else if (!strncmp("0", s, 2)) {
 609       screen->hw_has_separate_stencil = false;
 610    } else if (!strncmp("1", s, 2)) {
 611       screen->hw_has_separate_stencil = true;
 612    } else {
 613       fprintf(stderr,
 614               "warning: env variable INTEL_SEPARATE_STENCIL=\"%s\" has "
 615               "invalid value and is ignored", s);
 616    }
 617 }
 618
 619 /**
 620  * This is the driver specific part of the createNewScreen entry point.
 621  * Called when using DRI2.
 622  *
 623  * \return the struct gl_config supported by this driver
 624  */
 625 static const
 626 __DRIconfig **intelInitScreen2(__DRIscreen *psp)
 627 {
 628    struct intel_screen *intelScreen;
 629    GLenum fb_format[3];
 630    GLenum fb_type[3];
 631    unsigned int api_mask;
 632    char *devid_override;
 633
 634    static const GLenum back_buffer_modes[] = {
 635        GLX_NONE, GLX_SWAP_UNDEFINED_OML, GLX_SWAP_COPY_OML
 636    };
 637    uint8_t depth_bits[4], stencil_bits[4], msaa_samples_array[1];
 638    int color;
 639    __DRIconfig **configs = NULL;
 640
 641    /* Allocate the private area */
 642    intelScreen = CALLOC(sizeof *intelScreen);
 643    if (!intelScreen) {
 644       fprintf(stderr, "\nERROR!  Allocating private area failed\n");
 645       return false;
 646    }
 647    /* parse information in __driConfigOptions */
 648    driParseOptionInfo(&intelScreen->optionCache,
 649                       __driConfigOptions, __driNConfigOptions);
 650
 651    intelScreen->driScrnPriv = psp;
 652    psp->driverPrivate = (void *) intelScreen;
 653
 654    /* Determine chipset ID */
 655    if (!intel_get_param(psp, I915_PARAM_CHIPSET_ID,
 656                         &intelScreen->deviceID))
 657       return false;
 658
 659    /* Allow an override of the device ID for the purpose of making the
 660     * driver produce dumps for debugging of new chipset enablement.
 661     * This implies INTEL_NO_HW, to avoid programming your actual GPU
 662     * incorrectly.
 663     */
 664    devid_override = getenv("INTEL_DEVID_OVERRIDE");
 665    if (devid_override) {
 666       intelScreen->deviceID = strtod(devid_override, NULL);
 667    }
 668
 669    if (IS_GEN7(intelScreen->deviceID)) {
 670       intelScreen->gen = 7;
 671    } else if (IS_GEN6(intelScreen->deviceID)) {
 672       intelScreen->gen = 6;
 673    } else if (IS_GEN5(intelScreen->deviceID)) {
 674       intelScreen->gen = 5;
 675    } else if (IS_965(intelScreen->deviceID)) {
 676       intelScreen->gen = 4;
 677    } else if (IS_9XX(intelScreen->deviceID)) {
 678       intelScreen->gen = 3;
 679    } else {
 680       intelScreen->gen = 2;
 681    }
 682
 683    intelScreen->hw_has_separate_stencil = intelScreen->gen >= 6;
 684    intelScreen->hw_must_use_separate_stencil = intelScreen->gen >= 7;
 685    intelScreen->hw_has_hiz = intelScreen->gen == 6; /* Not yet for gen7. */
 686    intelScreen->dri2_has_hiz = INTEL_DRI2_HAS_HIZ_UNKNOWN;
 687
 688    intel_override_hiz(intelScreen);
 689    intel_override_separate_stencil(intelScreen);
 690
 691    api_mask = (1 << __DRI_API_OPENGL);
 692 #if FEATURE_ES1
 693    api_mask |= (1 << __DRI_API_GLES);
 694 #endif
 695 #if FEATURE_ES2
 696    api_mask |= (1 << __DRI_API_GLES2);
 697 #endif
 698
 699    if (IS_9XX(intelScreen->deviceID) || IS_965(intelScreen->deviceID))
 700       psp->api_mask = api_mask;
 701
 702    if (!intel_init_bufmgr(intelScreen))
 703        return false;
 704
 705    psp->extensions = intelScreenExtensions;
 706
 707    msaa_samples_array[0] = 0;
 708
 709    fb_format[0] = GL_RGB;
 710    fb_type[0] = GL_UNSIGNED_SHORT_5_6_5;
 711
 712    fb_format[1] = GL_BGR;
 713    fb_type[1] = GL_UNSIGNED_INT_8_8_8_8_REV;
 714
 715    fb_format[2] = GL_BGRA;
 716    fb_type[2] = GL_UNSIGNED_INT_8_8_8_8_REV;
 717
 718    depth_bits[0] = 0;
 719    stencil_bits[0] = 0;
 720
 721    /* Generate a rich set of useful configs that do not include an
 722     * accumulation buffer.
 723     */
 724    for (color = 0; color < ARRAY_SIZE(fb_format); color++) {
 725       __DRIconfig **new_configs;
 726       int depth_factor;
 727
 728       /* Starting with DRI2 protocol version 1.1 we can request a depth/stencil
 729        * buffer that has a diffferent number of bits per pixel than the color
 730        * buffer.  This isn't yet supported here.
 731        */
 732       if (fb_type[color] == GL_UNSIGNED_SHORT_5_6_5) {
 733          depth_bits[1] = 16;
 734          stencil_bits[1] = 0;
 735       } else {
 736          depth_bits[1] = 24;
 737          stencil_bits[1] = 8;
 738       }
 739
 740       depth_factor = 2;
 741
 742       new_configs = driCreateConfigs(fb_format[color], fb_type[color],
 743                                      depth_bits,
 744                                      stencil_bits,
 745                                      depth_factor,
 746                                      back_buffer_modes,
 747                                      ARRAY_SIZE(back_buffer_modes),
 748                                      msaa_samples_array,
 749                                      ARRAY_SIZE(msaa_samples_array),
 750                                      false);
 751       if (configs == NULL)
 752          configs = new_configs;
 753       else
 754          configs = driConcatConfigs(configs, new_configs);
 755    }
 756
 757    /* Generate the minimum possible set of configs that include an
 758     * accumulation buffer.
 759     */
 760    for (color = 0; color < ARRAY_SIZE(fb_format); color++) {
 761       __DRIconfig **new_configs;
 762
 763       if (fb_type[color] == GL_UNSIGNED_SHORT_5_6_5) {
 764          depth_bits[0] = 16;
 765          stencil_bits[0] = 0;
 766       } else {
 767          depth_bits[0] = 24;
 768          stencil_bits[0] = 8;
 769       }
 770
 771       new_configs = driCreateConfigs(fb_format[color], fb_type[color],
 772                                      depth_bits, stencil_bits, 1,
 773                                      back_buffer_modes + 1, 1,
 774                                      msaa_samples_array, 1,
 775                                      true);
 776       if (configs == NULL)
 777          configs = new_configs;
 778       else
 779          configs = driConcatConfigs(configs, new_configs);
 780    }
 781
 782    if (configs == NULL) {
 783       fprintf(stderr, "[%s:%u] Error creating FBConfig!\n", __func__,
 784               __LINE__);
 785       return NULL;
 786    }
 787
 788    return (const __DRIconfig **)configs;
 789 }
 790
 791 struct intel_buffer {
 792    __DRIbuffer base;
 793    struct intel_region *region;
 794 };
 795
 796 /**
 797  * \brief Get tiling format for a DRI buffer.
 798  *
 799  * \param attachment is the buffer's attachmet point, such as
 800  *        __DRI_BUFFER_DEPTH.
 801  * \param out_tiling is the returned tiling format for buffer.
 802  * \return false if attachment is unrecognized or is incompatible with screen.
 803  */
 804 static bool
 805 intel_get_dri_buffer_tiling(struct intel_screen *screen,
 806                             uint32_t attachment,
 807                             uint32_t *out_tiling)
 808 {
 809    if (screen->gen < 4) {
 810       *out_tiling = I915_TILING_X;
 811       return true;
 812    }
 813
 814    switch (attachment) {
 815    case __DRI_BUFFER_DEPTH:
 816    case __DRI_BUFFER_DEPTH_STENCIL:
 817    case __DRI_BUFFER_HIZ:
 818       *out_tiling = I915_TILING_Y;
 819       return true;
 820    case __DRI_BUFFER_ACCUM:
 821    case __DRI_BUFFER_FRONT_LEFT:
 822    case __DRI_BUFFER_FRONT_RIGHT:
 823    case __DRI_BUFFER_BACK_LEFT:
 824    case __DRI_BUFFER_BACK_RIGHT:
 825    case __DRI_BUFFER_FAKE_FRONT_LEFT:
 826    case __DRI_BUFFER_FAKE_FRONT_RIGHT:
 827       *out_tiling = I915_TILING_X;
 828       return true;
 829    case __DRI_BUFFER_STENCIL:
 830       /* The stencil buffer is W tiled. However, we request from the kernel
 831        * a non-tiled buffer because the GTT is incapable of W fencing.
 832        */
 833       *out_tiling = I915_TILING_NONE;
 834       return true;
 835    default:
 836       if(unlikely(INTEL_DEBUG & DEBUG_DRI)) {
 837          fprintf(stderr, "error: %s: unrecognized DRI buffer attachment 0x%x\n",
 838                  __FUNCTION__, attachment);
 839       }
 840        return false;
 841    }
 842 }
 843
 844 static __DRIbuffer *
 845 intelAllocateBuffer(__DRIscreen *screen,
 846                     unsigned attachment, unsigned format,
 847                     int width, int height)
 848 {
 849    struct intel_buffer *intelBuffer;
 850    struct intel_screen *intelScreen = screen->driverPrivate;
 851
 852    uint32_t tiling;
 853    uint32_t region_width;
 854    uint32_t region_height;
 855    uint32_t region_cpp;
 856
 857    bool ok = true;
 858
 859    ok = intel_get_dri_buffer_tiling(intelScreen, attachment, &tiling);
 860    if (!ok)
 861       return NULL;
 862
 863    intelBuffer = CALLOC(sizeof *intelBuffer);
 864    if (intelBuffer == NULL)
 865       return NULL;
 866
 867    if (attachment == __DRI_BUFFER_STENCIL) {
 868       /* The stencil buffer has quirky pitch requirements.  From Vol 2a,
 869        * 11.5.6.2.1 3DSTATE_STENCIL_BUFFER, field "Surface Pitch":
 870        *    The pitch must be set to 2x the value computed based on width, as
 871        *    the stencil buffer is stored with two rows interleaved.
 872        * To accomplish this, we resort to the nasty hack of doubling the
 873        * region's cpp and halving its height.
 874        */
 875       region_width = ALIGN(width, 64);
 876       region_height = ALIGN(ALIGN(height, 2) / 2, 64);
 877       region_cpp = format / 4;
 878    } else {
 879       region_width = width;
 880       region_height = height;
 881       region_cpp = format / 8;
 882    }
 883
 884    intelBuffer->region = intel_region_alloc(intelScreen,
 885                                             tiling,
 886                                             region_cpp,
 887                                             region_width,
 888                                             region_height,
 889                                             true);
 890
 891    if (intelBuffer->region == NULL) {
 892            FREE(intelBuffer);
 893            return NULL;
 894    }
 895
 896    intel_region_flink(intelBuffer->region, &intelBuffer->base.name);
 897
 898    intelBuffer->base.attachment = attachment;
 899    intelBuffer->base.cpp = intelBuffer->region->cpp;
 900    intelBuffer->base.pitch =
 901          intelBuffer->region->pitch * intelBuffer->region->cpp;
 902
 903    return &intelBuffer->base;
 904 }
 905
 906 static void
 907 intelReleaseBuffer(__DRIscreen *screen, __DRIbuffer *buffer)
 908 {
 909    struct intel_buffer *intelBuffer = (struct intel_buffer *) buffer;
 910
 911    intel_region_release(&intelBuffer->region);
 912    free(intelBuffer);
 913 }
 914
 915
 916 const struct __DriverAPIRec driDriverAPI = {
 917    .InitScreen           = intelInitScreen2,
 918    .DestroyScreen        = intelDestroyScreen,
 919    .CreateContext        = intelCreateContext,
 920    .DestroyContext       = intelDestroyContext,
 921    .CreateBuffer         = intelCreateBuffer,
 922    .DestroyBuffer        = intelDestroyBuffer,
 923    .MakeCurrent          = intelMakeCurrent,
 924    .UnbindContext        = intelUnbindContext,
 925    .AllocateBuffer       = intelAllocateBuffer,
 926    .ReleaseBuffer        = intelReleaseBuffer
 927 };
 928
 929 /* This is the table of extensions that the loader will dlsym() for. */
 930 PUBLIC const __DRIextension *__driDriverExtensions[] = {
 931     &driCoreExtension.base,
 932     &driDRI2Extension.base,
 933     NULL
 934 };