src/mesa/drivers/dri/intel_winsys/intel_buffers.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 "intel_screen.h"
  29 #include "intel_context.h"
  30 #include "intel_blit.h"
  31 #include "intel_buffers.h"
  32 #include "intel_batchbuffer.h"
  33 #include "intel_reg.h"
  34 #include "context.h"
  35 #include "utils.h"
  36 #include "drirenderbuffer.h"
  37 #include "vblank.h"
  38
  39 #include "pipe/p_context.h"
  40
  41
  42 /* This block can be removed when libdrm >= 2.3.1 is required */
  43
  44 #ifndef DRM_VBLANK_FLIP
  45
  46 #define DRM_VBLANK_FLIP 0x8000000
  47
  48 typedef struct drm_i915_flip {
  49    int pipes;
  50 } drm_i915_flip_t;
  51
  52 #undef DRM_IOCTL_I915_FLIP
  53 #define DRM_IOCTL_I915_FLIP DRM_IOW(DRM_COMMAND_BASE + DRM_I915_FLIP, \
  54                                     drm_i915_flip_t)
  55
  56 #endif
  57
  58
  59 /**
  60  * XXX move this into a new dri/common/cliprects.c file.
  61  */
  62 GLboolean
  63 intel_intersect_cliprects(drm_clip_rect_t * dst,
  64                           const drm_clip_rect_t * a,
  65                           const drm_clip_rect_t * b)
  66 {
  67    GLint bx = b->x1;
  68    GLint by = b->y1;
  69    GLint bw = b->x2 - bx;
  70    GLint bh = b->y2 - by;
  71
  72    if (bx < a->x1)
  73       bw -= a->x1 - bx, bx = a->x1;
  74    if (by < a->y1)
  75       bh -= a->y1 - by, by = a->y1;
  76    if (bx + bw > a->x2)
  77       bw = a->x2 - bx;
  78    if (by + bh > a->y2)
  79       bh = a->y2 - by;
  80    if (bw <= 0)
  81       return GL_FALSE;
  82    if (bh <= 0)
  83       return GL_FALSE;
  84
  85    dst->x1 = bx;
  86    dst->y1 = by;
  87    dst->x2 = bx + bw;
  88    dst->y2 = by + bh;
  89
  90    return GL_TRUE;
  91 }
  92
  93 <<<<<<< HEAD:src/mesa/drivers/dri/intel_winsys/intel_buffers.c
  94 /**
  95  * Return pointer to current color drawing region, or NULL.
  96  */
  97 #if 0
  98 struct pipe_region *
  99 intel_drawbuf_region(struct intel_context *intel)
 100 {
 101    struct intel_renderbuffer *irbColor =
 102       intel_renderbuffer(intel->ctx.DrawBuffer->_ColorDrawBuffers[0][0]);
 103    if (irbColor)
 104       return irbColor->Base.surface->region;
 105    else
 106       return NULL;
 107 }
 108 =======
 109 >>>>>>> remove dead code, remove intel_fbo.h includes:src/mesa/drivers/dri/intel_winsys/intel_buffers.c
 110
 111 <<<<<<< HEAD:src/mesa/drivers/dri/intel_winsys/intel_buffers.c
 112 /**
 113  * Return pointer to current color reading region, or NULL.
 114  */
 115 struct pipe_region *
 116 intel_readbuf_region(struct intel_context *intel)
 117 {
 118    struct intel_renderbuffer *irb
 119       = intel_renderbuffer(intel->ctx.ReadBuffer->_ColorReadBuffer);
 120    if (irb)
 121       return irb->Base.surface->region;
 122    else
 123       return NULL;
 124 }
 125 #endif
 126 =======
 127 >>>>>>> remove dead code, remove intel_fbo.h includes:src/mesa/drivers/dri/intel_winsys/intel_buffers.c
 128
 129 /**
 130  * This will be called whenever the currently bound window is moved/resized.
 131  * XXX: actually, it seems to NOT be called when the window is only moved (BP).
 132  */
 133 void
 134 intelWindowMoved(struct intel_context *intel)
 135 {
 136    GLcontext *ctx = &intel->ctx;
 137    __DRIdrawablePrivate *dPriv = intel->driDrawable;
 138    struct intel_framebuffer *intel_fb = dPriv->driverPrivate;
 139
 140    if (!intel->ctx.DrawBuffer) {
 141       /* when would this happen? -BP */
 142       assert(0);
 143       intel->numClipRects = 0;
 144    }
 145
 146    /* Update Mesa's notion of window size */
 147    driUpdateFramebufferSize(ctx, dPriv);
 148    intel_fb->Base.Initialized = GL_TRUE; /* XXX remove someday */
 149
 150    {
 151       drmI830Sarea *sarea = intel->sarea;
 152       drm_clip_rect_t drw_rect = { .x1 = dPriv->x, .x2 = dPriv->x + dPriv->w,
 153                                    .y1 = dPriv->y, .y2 = dPriv->y + dPriv->h };
 154       drm_clip_rect_t pipeA_rect = { .x1 = sarea->pipeA_x, .y1 = sarea->pipeA_y,
 155                                      .x2 = sarea->pipeA_x + sarea->pipeA_w,
 156                                      .y2 = sarea->pipeA_y + sarea->pipeA_h };
 157       drm_clip_rect_t pipeB_rect = { .x1 = sarea->pipeB_x, .y1 = sarea->pipeB_y,
 158                                      .x2 = sarea->pipeB_x + sarea->pipeB_w,
 159                                      .y2 = sarea->pipeB_y + sarea->pipeB_h };
 160       GLint areaA = driIntersectArea( drw_rect, pipeA_rect );
 161       GLint areaB = driIntersectArea( drw_rect, pipeB_rect );
 162       GLuint flags = intel_fb->vblank_flags;
 163       GLboolean pf_active;
 164       GLint pf_pipes;
 165
 166       /* Update page flipping info
 167        */
 168       pf_pipes = 0;
 169
 170       if (areaA > 0)
 171          pf_pipes |= 1;
 172
 173       if (areaB > 0)
 174          pf_pipes |= 2;
 175
 176       intel_fb->pf_current_page = (intel->sarea->pf_current_page >>
 177                                    (intel_fb->pf_pipes & 0x2)) & 0x3;
 178
 179       intel_fb->pf_num_pages = 2 /*intel->intelScreen->third.handle ? 3 : 2*/;
 180
 181       pf_active = pf_pipes && (pf_pipes & intel->sarea->pf_active) == pf_pipes;
 182
 183       if (INTEL_DEBUG & DEBUG_LOCK)
 184          if (pf_active != intel_fb->pf_active)
 185             _mesa_printf("%s - Page flipping %sactive\n", __progname,
 186                          pf_active ? "" : "in");
 187
 188       if (pf_active) {
 189          /* Sync pages between pipes if we're flipping on both at the same time */
 190          if (pf_pipes == 0x3 && pf_pipes != intel_fb->pf_pipes &&
 191              (intel->sarea->pf_current_page & 0x3) !=
 192              (((intel->sarea->pf_current_page) >> 2) & 0x3)) {
 193             drm_i915_flip_t flip;
 194
 195             if (intel_fb->pf_current_page ==
 196                 (intel->sarea->pf_current_page & 0x3)) {
 197                /* XXX: This is ugly, but emitting two flips 'in a row' can cause
 198                 * lockups for unknown reasons.
 199                 */
 200                intel->sarea->pf_current_page =
 201                   intel->sarea->pf_current_page & 0x3;
 202                intel->sarea->pf_current_page |=
 203                   ((intel_fb->pf_current_page + intel_fb->pf_num_pages - 1) %
 204                    intel_fb->pf_num_pages) << 2;
 205
 206                flip.pipes = 0x2;
 207             } else {
 208                intel->sarea->pf_current_page =
 209                   intel->sarea->pf_current_page & (0x3 << 2);
 210                intel->sarea->pf_current_page |=
 211                   (intel_fb->pf_current_page + intel_fb->pf_num_pages - 1) %
 212                   intel_fb->pf_num_pages;
 213
 214                flip.pipes = 0x1;
 215             }
 216
 217             drmCommandWrite(intel->driFd, DRM_I915_FLIP, &flip, sizeof(flip));
 218          }
 219
 220          intel_fb->pf_pipes = pf_pipes;
 221       }
 222
 223       intel_fb->pf_active = pf_active;
 224 #if 0
 225       intel_flip_renderbuffers(intel_fb);
 226       intel_draw_buffer(&intel->ctx, intel->ctx.DrawBuffer);
 227 #endif
 228
 229       /* Update vblank info
 230        */
 231       if (areaB > areaA || (areaA == areaB && areaB > 0)) {
 232          flags = intel_fb->vblank_flags | VBLANK_FLAG_SECONDARY;
 233       } else {
 234          flags = intel_fb->vblank_flags & ~VBLANK_FLAG_SECONDARY;
 235       }
 236
 237       if (flags != intel_fb->vblank_flags && intel_fb->vblank_flags &&
 238           !(intel_fb->vblank_flags & VBLANK_FLAG_NO_IRQ)) {
 239          drmVBlank vbl;
 240          int i;
 241
 242          vbl.request.type = DRM_VBLANK_ABSOLUTE;
 243
 244          if ( intel_fb->vblank_flags & VBLANK_FLAG_SECONDARY ) {
 245             vbl.request.type |= DRM_VBLANK_SECONDARY;
 246          }
 247
 248          for (i = 0; i < intel_fb->pf_num_pages; i++) {
 249             if ((intel_fb->vbl_waited - intel_fb->vbl_pending[i]) <= (1<<23))
 250                continue;
 251
 252             vbl.request.sequence = intel_fb->vbl_pending[i];
 253             drmWaitVBlank(intel->driFd, &vbl);
 254          }
 255
 256          intel_fb->vblank_flags = flags;
 257          driGetCurrentVBlank(dPriv, intel_fb->vblank_flags, &intel_fb->vbl_seq);
 258          intel_fb->vbl_waited = intel_fb->vbl_seq;
 259
 260          for (i = 0; i < intel_fb->pf_num_pages; i++) {
 261             intel_fb->vbl_pending[i] = intel_fb->vbl_waited;
 262          }
 263       }
 264    }
 265
 266    /* This will be picked up by looking at the dirty state flags:
 267     */
 268
 269    /* Update hardware scissor */
 270 //   ctx->Driver.Scissor(ctx, ctx->Scissor.X, ctx->Scissor.Y,
 271 //                       ctx->Scissor.Width, ctx->Scissor.Height);
 272
 273    /* Re-calculate viewport related state */
 274 //   ctx->Driver.DepthRange( ctx, ctx->Viewport.Near, ctx->Viewport.Far );
 275 }
 276
 277
 278
 279
 280
 281 /* Emit wait for pending flips */
 282 #if 0
 283 void
 284 intel_wait_flips(struct intel_context *intel, GLuint batch_flags)
 285 {
 286    struct intel_framebuffer *intel_fb =
 287       (struct intel_framebuffer *) intel->ctx.DrawBuffer;
 288    struct intel_renderbuffer *intel_rb =
 289       intel_get_renderbuffer(&intel_fb->Base,
 290                              intel_fb->Base._ColorDrawBufferMask[0] ==
 291                              BUFFER_BIT_FRONT_LEFT ? BUFFER_FRONT_LEFT :
 292                              BUFFER_BACK_LEFT);
 293
 294    if (intel_fb->Base.Name == 0 && intel_rb->pf_pending == intel_fb->pf_seq) {
 295       GLint pf_pipes = intel_fb->pf_pipes;
 296       BATCH_LOCALS;
 297
 298       /* Wait for pending flips to take effect */
 299       BEGIN_BATCH(2, batch_flags);
 300       OUT_BATCH(pf_pipes & 0x1 ? (MI_WAIT_FOR_EVENT | MI_WAIT_FOR_PLANE_A_FLIP)
 301                 : 0);
 302       OUT_BATCH(pf_pipes & 0x2 ? (MI_WAIT_FOR_EVENT | MI_WAIT_FOR_PLANE_B_FLIP)
 303                 : 0);
 304       ADVANCE_BATCH();
 305
 306       intel_rb->pf_pending--;
 307    }
 308 }
 309 #endif
 310
 311 #if 0
 312 /* Flip the front & back buffers
 313  */
 314 static GLboolean
 315 intelPageFlip(const __DRIdrawablePrivate * dPriv)
 316 {
 317    struct intel_context *intel;
 318    int ret;
 319    struct intel_framebuffer *intel_fb = dPriv->driverPrivate;
 320
 321    if (INTEL_DEBUG & DEBUG_IOCTL)
 322       fprintf(stderr, "%s\n", __FUNCTION__);
 323
 324    assert(dPriv);
 325    assert(dPriv->driContextPriv);
 326    assert(dPriv->driContextPriv->driverPrivate);
 327
 328    intel = (struct intel_context *) dPriv->driContextPriv->driverPrivate;
 329
 330    if (intel->intelScreen->drmMinor < 9)
 331       return GL_FALSE;
 332
 333    intelFlush(&intel->ctx);
 334
 335    ret = 0;
 336
 337    LOCK_HARDWARE(intel);
 338
 339    if (dPriv->numClipRects && intel_fb->pf_active) {
 340       drm_i915_flip_t flip;
 341
 342       flip.pipes = intel_fb->pf_pipes;
 343
 344       ret = drmCommandWrite(intel->driFd, DRM_I915_FLIP, &flip, sizeof(flip));
 345    }
 346
 347    UNLOCK_HARDWARE(intel);
 348
 349    if (ret || !intel_fb->pf_active)
 350       return GL_FALSE;
 351
 352    if (!dPriv->numClipRects) {
 353       usleep(10000);    /* throttle invisible client 10ms */
 354    }
 355
 356    intel_fb->pf_current_page = (intel->sarea->pf_current_page >>
 357                                 (intel_fb->pf_pipes & 0x2)) & 0x3;
 358
 359    if (dPriv->numClipRects != 0) {
 360       intel_get_renderbuffer(&intel_fb->Base, BUFFER_FRONT_LEFT)->pf_pending =
 361       intel_get_renderbuffer(&intel_fb->Base, BUFFER_BACK_LEFT)->pf_pending =
 362          ++intel_fb->pf_seq;
 363    }
 364
 365 #if 0
 366    intel_flip_renderbuffers(intel_fb);
 367    intel_draw_buffer(&intel->ctx, &intel_fb->Base);
 368 #endif
 369
 370    if (INTEL_DEBUG & DEBUG_IOCTL)
 371       fprintf(stderr, "%s: success\n", __FUNCTION__);
 372
 373    return GL_TRUE;
 374 }
 375 #endif
 376
 377
 378 static GLboolean
 379 intelScheduleSwap(const __DRIdrawablePrivate * dPriv, GLboolean *missed_target)
 380 {
 381    struct intel_framebuffer *intel_fb = dPriv->driverPrivate;
 382    unsigned int interval = driGetVBlankInterval(dPriv, intel_fb->vblank_flags);
 383    struct intel_context *intel =
 384       intelScreenContext(dPriv->driScreenPriv->private);
 385    const intelScreenPrivate *intelScreen = intel->intelScreen;
 386    unsigned int target;
 387    drm_i915_vblank_swap_t swap;
 388    GLboolean ret;
 389
 390    if (!intel_fb->vblank_flags ||
 391        (intel_fb->vblank_flags & VBLANK_FLAG_NO_IRQ) ||
 392        intelScreen->drmMinor < (intel_fb->pf_active ? 9 : 6))
 393       return GL_FALSE;
 394
 395    swap.seqtype = DRM_VBLANK_ABSOLUTE;
 396
 397    if (intel_fb->vblank_flags & VBLANK_FLAG_SYNC) {
 398       swap.seqtype |= DRM_VBLANK_NEXTONMISS;
 399    } else if (interval == 0) {
 400       return GL_FALSE;
 401    }
 402
 403    swap.drawable = dPriv->hHWDrawable;
 404    target = swap.sequence = intel_fb->vbl_seq + interval;
 405
 406    if ( intel_fb->vblank_flags & VBLANK_FLAG_SECONDARY ) {
 407       swap.seqtype |= DRM_VBLANK_SECONDARY;
 408    }
 409
 410    LOCK_HARDWARE(intel);
 411
 412    intel_batchbuffer_flush(intel->batch);
 413
 414    if ( intel_fb->pf_active ) {
 415       swap.seqtype |= DRM_VBLANK_FLIP;
 416
 417       intel_fb->pf_current_page = (((intel->sarea->pf_current_page >>
 418                                      (intel_fb->pf_pipes & 0x2)) & 0x3) + 1) %
 419                                   intel_fb->pf_num_pages;
 420    }
 421
 422    if (!drmCommandWriteRead(intel->driFd, DRM_I915_VBLANK_SWAP, &swap,
 423                             sizeof(swap))) {
 424       intel_fb->vbl_seq = swap.sequence;
 425       swap.sequence -= target;
 426       *missed_target = swap.sequence > 0 && swap.sequence <= (1 << 23);
 427
 428 #if 1
 429       intel_fb->vbl_pending[1] = intel_fb->vbl_pending[0] = intel_fb->vbl_seq;
 430 #else
 431       intel_get_renderbuffer(&intel_fb->Base, BUFFER_BACK_LEFT)->vbl_pending =
 432          intel_get_renderbuffer(&intel_fb->Base,
 433                                 BUFFER_FRONT_LEFT)->vbl_pending =
 434          intel_fb->vbl_seq;
 435 #endif
 436
 437       if (swap.seqtype & DRM_VBLANK_FLIP) {
 438 #if 0
 439          intel_flip_renderbuffers(intel_fb);
 440          intel_draw_buffer(&intel->ctx, intel->ctx.DrawBuffer);
 441 #endif
 442       }
 443
 444       ret = GL_TRUE;
 445    } else {
 446       if (swap.seqtype & DRM_VBLANK_FLIP) {
 447          intel_fb->pf_current_page = ((intel->sarea->pf_current_page >>
 448                                         (intel_fb->pf_pipes & 0x2)) & 0x3) %
 449                                      intel_fb->pf_num_pages;
 450       }
 451
 452       ret = GL_FALSE;
 453    }
 454
 455    UNLOCK_HARDWARE(intel);
 456
 457    return ret;
 458 }
 459
 460 void
 461 intelSwapBuffers(__DRIdrawablePrivate * dPriv)
 462 {
 463    if (dPriv->driContextPriv && dPriv->driContextPriv->driverPrivate) {
 464       GET_CURRENT_CONTEXT(ctx);
 465       struct intel_context *intel;
 466
 467       if (ctx == NULL)
 468          return;
 469
 470       intel = intel_context(ctx);
 471
 472       if (ctx->Visual.doubleBufferMode) {
 473          GLboolean missed_target;
 474          struct intel_framebuffer *intel_fb = dPriv->driverPrivate;
 475          int64_t ust;
 476
 477          _mesa_notifySwapBuffers(ctx);  /* flush pending rendering comands */
 478
 479          if (!intelScheduleSwap(dPriv, &missed_target)) {
 480             driWaitForVBlank(dPriv, &intel_fb->vbl_seq, intel_fb->vblank_flags,
 481                              &missed_target);
 482
 483             intelCopyBuffer(dPriv, NULL);
 484          }
 485
 486          intel_fb->swap_count++;
 487          (*dri_interface->getUST) (&ust);
 488          if (missed_target) {
 489             intel_fb->swap_missed_count++;
 490             intel_fb->swap_missed_ust = ust - intel_fb->swap_ust;
 491          }
 492
 493          intel_fb->swap_ust = ust;
 494       }
 495    }
 496    else {
 497       /* XXX this shouldn't be an error but we can't handle it for now */
 498       fprintf(stderr, "%s: drawable has no context!\n", __FUNCTION__);
 499    }
 500 }
 501
 502 void
 503 intelCopySubBuffer(__DRIdrawablePrivate * dPriv, int x, int y, int w, int h)
 504 {
 505    if (dPriv->driContextPriv && dPriv->driContextPriv->driverPrivate) {
 506       struct intel_context *intel =
 507          (struct intel_context *) dPriv->driContextPriv->driverPrivate;
 508       GLcontext *ctx = &intel->ctx;
 509
 510       if (ctx->Visual.doubleBufferMode) {
 511          drm_clip_rect_t rect;
 512          /* fixup cliprect (driDrawable may have changed?) later */
 513          rect.x1 = x;
 514          rect.y1 = y;
 515          rect.x2 = w;
 516          rect.y2 = h;
 517          _mesa_notifySwapBuffers(ctx);  /* flush pending rendering comands */
 518          intelCopyBuffer(dPriv, &rect);
 519       }
 520    }
 521    else {
 522       /* XXX this shouldn't be an error but we can't handle it for now */
 523       fprintf(stderr, "%s: drawable has no context!\n", __FUNCTION__);
 524    }
 525 }