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