shared-core/i915_irq.c

   1 /* i915_irq.c -- IRQ support for the I915 -*- linux-c -*-
   2  */
   3 /*
   4  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
   5  * All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the
   9  * "Software"), to deal in the Software without restriction, including
  10  * without limitation the rights to use, copy, modify, merge, publish,
  11  * distribute, sub license, and/or sell copies of the Software, and to
  12  * permit persons to whom the Software is furnished to do so, subject to
  13  * the following conditions:
  14  *
  15  * The above copyright notice and this permission notice (including the
  16  * next paragraph) shall be included in all copies or substantial portions
  17  * of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  20  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  21  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  22  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  23  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  24  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  25  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  26  *
  27  */
  28
  29 #include "drmP.h"
  30 #include "drm.h"
  31 #include "i915_drm.h"
  32 #include "i915_drv.h"
  33 #include "intel_drv.h"
  34
  35 #define MAX_NOPID ((u32)~0)
  36
  37 /**
  38  * i915_get_pipe - return the the pipe associated with a given plane
  39  * @dev: DRM device
  40  * @plane: plane to look for
  41  *
  42  * The Intel Mesa & 2D drivers call the vblank routines with a plane number
  43  * rather than a pipe number, since they may not always be equal.  This routine
  44  * maps the given @plane back to a pipe number.
  45  */
  46 static int
  47 i915_get_pipe(struct drm_device *dev, int plane)
  48 {
  49         struct drm_i915_private *dev_priv = (struct drm_i915_private *) dev->dev_private;
  50         u32 dspcntr;
  51
  52         dspcntr = plane ? I915_READ(DSPBCNTR) : I915_READ(DSPACNTR);
  53
  54         return dspcntr & DISPPLANE_SEL_PIPE_MASK ? 1 : 0;
  55 }
  56
  57 /**
  58  * i915_get_plane - return the the plane associated with a given pipe
  59  * @dev: DRM device
  60  * @pipe: pipe to look for
  61  *
  62  * The Intel Mesa & 2D drivers call the vblank routines with a plane number
  63  * rather than a plane number, since they may not always be equal.  This routine
  64  * maps the given @pipe back to a plane number.
  65  */
  66 static int
  67 i915_get_plane(struct drm_device *dev, int pipe)
  68 {
  69         if (i915_get_pipe(dev, 0) == pipe)
  70                 return 0;
  71         return 1;
  72 }
  73
  74 /**
  75  * i915_pipe_enabled - check if a pipe is enabled
  76  * @dev: DRM device
  77  * @pipe: pipe to check
  78  *
  79  * Reading certain registers when the pipe is disabled can hang the chip.
  80  * Use this routine to make sure the PLL is running and the pipe is active
  81  * before reading such registers if unsure.
  82  */
  83 static int
  84 i915_pipe_enabled(struct drm_device *dev, int pipe)
  85 {
  86         struct drm_i915_private *dev_priv = (struct drm_i915_private *) dev->dev_private;
  87         unsigned long pipeconf = pipe ? PIPEBCONF : PIPEACONF;
  88
  89         if (I915_READ(pipeconf) & PIPEACONF_ENABLE)
  90                 return 1;
  91
  92         return 0;
  93 }
  94
  95 /**
  96  * Emit a synchronous flip.
  97  *
  98  * This function must be called with the drawable spinlock held.
  99  */
 100 static void
 101 i915_dispatch_vsync_flip(struct drm_device *dev, struct drm_drawable_info *drw,
 102                          int plane)
 103 {
 104         struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
 105         struct drm_i915_sarea *sarea_priv = master_priv->sarea_priv;
 106         u16 x1, y1, x2, y2;
 107         int pf_planes = 1 << plane;
 108
 109         DRM_SPINLOCK_ASSERT(&dev->drw_lock);
 110
 111         /* If the window is visible on the other plane, we have to flip on that
 112          * plane as well.
 113          */
 114         if (plane == 1) {
 115                 x1 = sarea_priv->planeA_x;
 116                 y1 = sarea_priv->planeA_y;
 117                 x2 = x1 + sarea_priv->planeA_w;
 118                 y2 = y1 + sarea_priv->planeA_h;
 119         } else {
 120                 x1 = sarea_priv->planeB_x;
 121                 y1 = sarea_priv->planeB_y;
 122                 x2 = x1 + sarea_priv->planeB_w;
 123                 y2 = y1 + sarea_priv->planeB_h;
 124         }
 125
 126         if (x2 > 0 && y2 > 0) {
 127                 int i, num_rects = drw->num_rects;
 128                 struct drm_clip_rect *rect = drw->rects;
 129
 130                 for (i = 0; i < num_rects; i++)
 131                         if (!(rect[i].x1 >= x2 || rect[i].y1 >= y2 ||
 132                               rect[i].x2 <= x1 || rect[i].y2 <= y1)) {
 133                                 pf_planes = 0x3;
 134
 135                                 break;
 136                         }
 137         }
 138
 139         i915_dispatch_flip(dev, pf_planes, 1);
 140 }
 141
 142 /**
 143  * Emit blits for scheduled buffer swaps.
 144  *
 145  * This function will be called with the HW lock held.
 146  */
 147 static void i915_vblank_tasklet(struct drm_device *dev)
 148 {
 149         struct drm_i915_private *dev_priv = (struct drm_i915_private *) dev->dev_private;
 150         struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
 151         struct list_head *list, *tmp, hits, *hit;
 152         int nhits, nrects, slice[2], upper[2], lower[2], i, num_pages;
 153         unsigned counter[2];
 154         struct drm_drawable_info *drw;
 155         struct drm_i915_sarea *sarea_priv = master_priv->sarea_priv;
 156         u32 cpp = dev_priv->cpp,  offsets[3];
 157         u32 cmd = (cpp == 4) ? (XY_SRC_COPY_BLT_CMD |
 158                                 XY_SRC_COPY_BLT_WRITE_ALPHA |
 159                                 XY_SRC_COPY_BLT_WRITE_RGB)
 160                              : XY_SRC_COPY_BLT_CMD;
 161         u32 pitchropcpp = (sarea_priv->pitch * cpp) | (0xcc << 16) |
 162                                         (cpp << 23) | (1 << 24);
 163         RING_LOCALS;
 164
 165         counter[0] = drm_vblank_count(dev, 0);
 166         counter[1] = drm_vblank_count(dev, 1);
 167
 168         DRM_DEBUG("\n");
 169
 170         INIT_LIST_HEAD(&hits);
 171
 172         nhits = nrects = 0;
 173
 174         /* No irqsave/restore necessary.  This tasklet may be run in an
 175          * interrupt context or normal context, but we don't have to worry
 176          * about getting interrupted by something acquiring the lock, because
 177          * we are the interrupt context thing that acquires the lock.
 178          */
 179         DRM_SPINLOCK(&dev_priv->swaps_lock);
 180
 181         /* Find buffer swaps scheduled for this vertical blank */
 182         list_for_each_safe(list, tmp, &dev_priv->vbl_swaps.head) {
 183                 struct drm_i915_vbl_swap *vbl_swap =
 184                         list_entry(list, struct drm_i915_vbl_swap, head);
 185                 int pipe = i915_get_pipe(dev, vbl_swap->plane);
 186
 187                 if ((counter[pipe] - vbl_swap->sequence) > (1<<23))
 188                         continue;
 189
 190                 master_priv = vbl_swap->minor->master->driver_priv;
 191                 sarea_priv = master_priv->sarea_priv;
 192
 193                 pitchropcpp = (sarea_priv->pitch * cpp) | (0xcc << 16) |
 194                         (cpp << 23) | (1 << 24);
 195
 196                 list_del(list);
 197                 dev_priv->swaps_pending--;
 198                 drm_vblank_put(dev, pipe);
 199
 200                 DRM_SPINUNLOCK(&dev_priv->swaps_lock);
 201                 DRM_SPINLOCK(&dev->drw_lock);
 202
 203                 drw = drm_get_drawable_info(dev, vbl_swap->drw_id);
 204
 205                 if (!drw) {
 206                         DRM_SPINUNLOCK(&dev->drw_lock);
 207                         drm_free(vbl_swap, sizeof(*vbl_swap), DRM_MEM_DRIVER);
 208                         DRM_SPINLOCK(&dev_priv->swaps_lock);
 209                         continue;
 210                 }
 211
 212                 list_for_each(hit, &hits) {
 213                         struct drm_i915_vbl_swap *swap_cmp =
 214                                 list_entry(hit, struct drm_i915_vbl_swap, head);
 215                         struct drm_drawable_info *drw_cmp =
 216                                 drm_get_drawable_info(dev, swap_cmp->drw_id);
 217
 218                         if (drw_cmp &&
 219                             drw_cmp->rects[0].y1 > drw->rects[0].y1) {
 220                                 list_add_tail(list, hit);
 221                                 break;
 222                         }
 223                 }
 224
 225                 DRM_SPINUNLOCK(&dev->drw_lock);
 226
 227                 /* List of hits was empty, or we reached the end of it */
 228                 if (hit == &hits)
 229                         list_add_tail(list, hits.prev);
 230
 231                 nhits++;
 232
 233                 DRM_SPINLOCK(&dev_priv->swaps_lock);
 234         }
 235
 236         DRM_SPINUNLOCK(&dev_priv->swaps_lock);
 237
 238         if (nhits == 0) {
 239                 return;
 240         }
 241
 242         i915_kernel_lost_context(dev);
 243
 244         upper[0] = upper[1] = 0;
 245         slice[0] = max(sarea_priv->planeA_h / nhits, 1);
 246         slice[1] = max(sarea_priv->planeB_h / nhits, 1);
 247         lower[0] = sarea_priv->planeA_y + slice[0];
 248         lower[1] = sarea_priv->planeB_y + slice[0];
 249
 250         offsets[0] = sarea_priv->front_offset;
 251         offsets[1] = sarea_priv->back_offset;
 252         offsets[2] = sarea_priv->third_offset;
 253         num_pages = sarea_priv->third_handle ? 3 : 2;
 254
 255         DRM_SPINLOCK(&dev->drw_lock);
 256
 257         /* Emit blits for buffer swaps, partitioning both outputs into as many
 258          * slices as there are buffer swaps scheduled in order to avoid tearing
 259          * (based on the assumption that a single buffer swap would always
 260          * complete before scanout starts).
 261          */
 262         for (i = 0; i++ < nhits;
 263              upper[0] = lower[0], lower[0] += slice[0],
 264              upper[1] = lower[1], lower[1] += slice[1]) {
 265                 int init_drawrect = 1;
 266
 267                 if (i == nhits)
 268                         lower[0] = lower[1] = sarea_priv->height;
 269
 270                 list_for_each(hit, &hits) {
 271                         struct drm_i915_vbl_swap *swap_hit =
 272                                 list_entry(hit, struct drm_i915_vbl_swap, head);
 273                         struct drm_clip_rect *rect;
 274                         int num_rects, plane, front, back;
 275                         unsigned short top, bottom;
 276
 277                         drw = drm_get_drawable_info(dev, swap_hit->drw_id);
 278
 279                         if (!drw)
 280                                 continue;
 281
 282                         plane = swap_hit->plane;
 283
 284                         if (swap_hit->flip) {
 285                                 i915_dispatch_vsync_flip(dev, drw, plane);
 286                                 continue;
 287                         }
 288
 289                         if (init_drawrect) {
 290                                 BEGIN_LP_RING(6);
 291
 292                                 OUT_RING(GFX_OP_DRAWRECT_INFO);
 293                                 OUT_RING(0);
 294                                 OUT_RING(0);
 295                                 OUT_RING(sarea_priv->width | sarea_priv->height << 16);
 296                                 OUT_RING(sarea_priv->width | sarea_priv->height << 16);
 297                                 OUT_RING(0);
 298
 299                                 ADVANCE_LP_RING();
 300
 301                                 sarea_priv->ctxOwner = DRM_KERNEL_CONTEXT;
 302
 303                                 init_drawrect = 0;
 304                         }
 305
 306                         rect = drw->rects;
 307                         top = upper[plane];
 308                         bottom = lower[plane];
 309
 310                         front = (master_priv->sarea_priv->pf_current_page >>
 311                                  (2 * plane)) & 0x3;
 312                         back = (front + 1) % num_pages;
 313
 314                         for (num_rects = drw->num_rects; num_rects--; rect++) {
 315                                 int y1 = max(rect->y1, top);
 316                                 int y2 = min(rect->y2, bottom);
 317
 318                                 if (y1 >= y2)
 319                                         continue;
 320
 321                                 BEGIN_LP_RING(8);
 322
 323                                 OUT_RING(cmd);
 324                                 OUT_RING(pitchropcpp);
 325                                 OUT_RING((y1 << 16) | rect->x1);
 326                                 OUT_RING((y2 << 16) | rect->x2);
 327                                 OUT_RING(offsets[front]);
 328                                 OUT_RING((y1 << 16) | rect->x1);
 329                                 OUT_RING(pitchropcpp & 0xffff);
 330                                 OUT_RING(offsets[back]);
 331
 332                                 ADVANCE_LP_RING();
 333                         }
 334                 }
 335         }
 336
 337         DRM_SPINUNLOCK(&dev->drw_lock);
 338
 339         list_for_each_safe(hit, tmp, &hits) {
 340                 struct drm_i915_vbl_swap *swap_hit =
 341                         list_entry(hit, struct drm_i915_vbl_swap, head);
 342
 343                 list_del(hit);
 344
 345                 drm_free(swap_hit, sizeof(*swap_hit), DRM_MEM_DRIVER);
 346         }
 347 }
 348 #if 0
 349 static int i915_in_vblank(struct drm_device *dev, int pipe)
 350 {
 351         struct drm_i915_private *dev_priv = (struct drm_i915_private *) dev->dev_private;
 352         unsigned long pipedsl, vblank, vtotal;
 353         unsigned long vbl_start, vbl_end, cur_line;
 354
 355         pipedsl = pipe ? PIPEBDSL : PIPEADSL;
 356         vblank = pipe ? VBLANK_B : VBLANK_A;
 357         vtotal = pipe ? VTOTAL_B : VTOTAL_A;
 358
 359         vbl_start = I915_READ(vblank) & VBLANK_START_MASK;
 360         vbl_end = (I915_READ(vblank) >> VBLANK_END_SHIFT) & VBLANK_END_MASK;
 361
 362         cur_line = I915_READ(pipedsl);
 363
 364         if (cur_line >= vbl_start)
 365                 return 1;
 366
 367         return 0;
 368 }
 369 #endif
 370 u32 i915_get_vblank_counter(struct drm_device *dev, int plane)
 371 {
 372         struct drm_i915_private *dev_priv = (struct drm_i915_private *) dev->dev_private;
 373         unsigned long high_frame;
 374         unsigned long low_frame;
 375         u32 high1, high2, low, count;
 376         int pipe;
 377
 378         pipe = i915_get_pipe(dev, plane);
 379         high_frame = pipe ? PIPEBFRAMEHIGH : PIPEAFRAMEHIGH;
 380         low_frame = pipe ? PIPEBFRAMEPIXEL : PIPEAFRAMEPIXEL;
 381
 382         if (!i915_pipe_enabled(dev, pipe)) {
 383             printk(KERN_ERR "trying to get vblank count for disabled "
 384                    "pipe %d\n", pipe);
 385             return 0;
 386         }
 387
 388         /*
 389          * High & low register fields aren't synchronized, so make sure
 390          * we get a low value that's stable across two reads of the high
 391          * register.
 392          */
 393         do {
 394                 high1 = ((I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK) >>
 395                          PIPE_FRAME_HIGH_SHIFT);
 396                 low =  ((I915_READ(low_frame) & PIPE_FRAME_LOW_MASK) >>
 397                         PIPE_FRAME_LOW_SHIFT);
 398                 high2 = ((I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK) >>
 399                          PIPE_FRAME_HIGH_SHIFT);
 400         } while (high1 != high2);
 401
 402         count = (high1 << 8) | low;
 403
 404         /*
 405          * If we're in the middle of the vblank period, the
 406          * above regs won't have been updated yet, so return
 407          * an incremented count to stay accurate
 408          */
 409 #if 0
 410         if (i915_in_vblank(dev, pipe))
 411                 count++;
 412 #endif
 413         /* count may be reset by other driver(e.g. 2D driver),
 414            we have no way to know if it is wrapped or resetted
 415            when count is zero. do a rough guess.
 416         */
 417         if (count == 0 && dev->last_vblank[pipe] < dev->max_vblank_count/2)
 418                 dev->last_vblank[pipe] = 0;
 419
 420         return count;
 421 }
 422
 423 #define HOTPLUG_CMD_CRT 1
 424 #define HOTPLUG_CMD_CRT_DIS 2
 425 #define HOTPLUG_CMD_SDVOB 4
 426 #define HOTPLUG_CMD_SDVOC 8
 427 #define HOTPLUG_CMD_TV 16
 428
 429 static struct drm_device *hotplug_dev;
 430 static int hotplug_cmd = 0;
 431 static spinlock_t hotplug_lock = SPIN_LOCK_UNLOCKED;
 432
 433 static void i915_hotplug_tv(struct drm_device *dev)
 434 {
 435         struct drm_output *output;
 436         struct intel_output *iout;
 437         enum drm_output_status status;
 438
 439         mutex_lock(&dev->mode_config.mutex);
 440
 441         /* find the crt output */
 442         list_for_each_entry(output, &dev->mode_config.output_list, head) {
 443                 iout = output->driver_private;
 444                 if (iout->type == INTEL_OUTPUT_TVOUT)
 445                         break;
 446                 else
 447                         iout = 0;
 448         }
 449
 450         if (iout == 0)
 451                 goto unlock;
 452
 453         /* may need to I915_WRITE(TVDAC, 1<<31) to ack the interrupt */
 454         status = output->funcs->detect(output);
 455         drm_hotplug_stage_two(dev, output,
 456                               status == output_status_connected ? 1 : 0);
 457
 458 unlock:
 459         mutex_unlock(&dev->mode_config.mutex);
 460 }
 461
 462 static void i915_hotplug_crt(struct drm_device *dev, bool isconnected)
 463 {
 464         struct drm_output *output;
 465         struct intel_output *iout;
 466
 467         mutex_lock(&dev->mode_config.mutex);
 468
 469         /* find the crt output */
 470         list_for_each_entry(output, &dev->mode_config.output_list, head) {
 471                 iout = output->driver_private;
 472                 if (iout->type == INTEL_OUTPUT_ANALOG)
 473                         break;
 474                 else
 475                         iout = 0;
 476         }
 477
 478         if (iout == 0)
 479                 goto unlock;
 480
 481         drm_hotplug_stage_two(dev, output, isconnected);
 482
 483 unlock:
 484         mutex_unlock(&dev->mode_config.mutex);
 485 }
 486
 487 static void i915_hotplug_sdvo(struct drm_device *dev, int sdvoB)
 488 {
 489         struct drm_output *output = 0;
 490         enum drm_output_status status;
 491
 492         mutex_lock(&dev->mode_config.mutex);
 493
 494         output = intel_sdvo_find(dev, sdvoB);
 495
 496         if (!output)
 497                 goto unlock;
 498
 499         status = output->funcs->detect(output);
 500
 501         if (status != output_status_connected)
 502                 drm_hotplug_stage_two(dev, output, false);
 503         else
 504                 drm_hotplug_stage_two(dev, output, true);
 505
 506         intel_sdvo_set_hotplug(output, 1);
 507
 508 unlock:
 509         mutex_unlock(&dev->mode_config.mutex);
 510 }
 511 /*
 512  * This code is called in a more safe envirmoent to handle the hotplugs.
 513  * Add code here for hotplug love to userspace.
 514  */
 515 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20)
 516 static void i915_hotplug_work_func(void *work)
 517 #else
 518 static void i915_hotplug_work_func(struct work_struct *work)
 519 #endif
 520 {
 521         struct drm_device *dev = hotplug_dev;
 522         int crt;
 523         int crtDis;
 524         int sdvoB;
 525         int sdvoC;
 526         int tv;
 527
 528         spin_lock(&hotplug_lock);
 529         tv = hotplug_cmd & HOTPLUG_CMD_TV;
 530         crt = hotplug_cmd & HOTPLUG_CMD_CRT;
 531         crtDis = hotplug_cmd & HOTPLUG_CMD_CRT_DIS;
 532         sdvoB = hotplug_cmd & HOTPLUG_CMD_SDVOB;
 533         sdvoC = hotplug_cmd & HOTPLUG_CMD_SDVOC;
 534         hotplug_cmd = 0;
 535         spin_unlock(&hotplug_lock);
 536
 537         if (tv)
 538                 i915_hotplug_tv(dev);
 539         if (crt)
 540                 i915_hotplug_crt(dev, true);
 541         if (crtDis)
 542                 i915_hotplug_crt(dev, false);
 543
 544         if (sdvoB)
 545                 i915_hotplug_sdvo(dev, 1);
 546
 547         if (sdvoC)
 548                 i915_hotplug_sdvo(dev, 0);
 549
 550         drm_handle_hotplug(dev);
 551 }
 552
 553 static int i915_run_hotplug_tasklet(struct drm_device *dev, uint32_t stat)
 554 {
 555 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20)
 556         static DECLARE_WORK(hotplug, i915_hotplug_work_func, NULL);
 557 #else
 558         static DECLARE_WORK(hotplug, i915_hotplug_work_func);
 559 #endif
 560         struct drm_i915_private *dev_priv = dev->dev_private;
 561
 562         hotplug_dev = dev;
 563
 564         if (stat & TV_HOTPLUG_INT_STATUS) {
 565                 DRM_DEBUG("TV event\n");
 566
 567                 spin_lock(&hotplug_lock);
 568                 hotplug_cmd |= HOTPLUG_CMD_TV;
 569                 spin_unlock(&hotplug_lock);
 570         }
 571
 572         if (stat & CRT_HOTPLUG_INT_STATUS) {
 573                 DRM_DEBUG("CRT event\n");
 574
 575                 if (stat & CRT_HOTPLUG_MONITOR_MASK) {
 576                         spin_lock(&hotplug_lock);
 577                         hotplug_cmd |= HOTPLUG_CMD_CRT;
 578                         spin_unlock(&hotplug_lock);
 579                 } else {
 580                         spin_lock(&hotplug_lock);
 581                         hotplug_cmd |= HOTPLUG_CMD_CRT_DIS;
 582                         spin_unlock(&hotplug_lock);
 583                 }
 584         }
 585
 586         if (stat & SDVOB_HOTPLUG_INT_STATUS) {
 587                 DRM_DEBUG("sDVOB event\n");
 588
 589                 spin_lock(&hotplug_lock);
 590                 hotplug_cmd |= HOTPLUG_CMD_SDVOB;
 591                 spin_unlock(&hotplug_lock);
 592         }
 593
 594         if (stat & SDVOC_HOTPLUG_INT_STATUS) {
 595                 DRM_DEBUG("sDVOC event\n");
 596
 597                 spin_lock(&hotplug_lock);
 598                 hotplug_cmd |= HOTPLUG_CMD_SDVOC;
 599                 spin_unlock(&hotplug_lock);
 600         }
 601
 602         queue_work(dev_priv->wq, &hotplug);
 603
 604         return 0;
 605 }
 606
 607 irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS)
 608 {
 609         struct drm_device *dev = (struct drm_device *) arg;
 610         struct drm_i915_master_private *master_priv;
 611         struct drm_i915_private *dev_priv = (struct drm_i915_private *) dev->dev_private;
 612         u32 iir;
 613         u32 pipea_stats, pipeb_stats;
 614         int hotplug = 0;
 615         int vblank = 0;
 616
 617         /* On i8xx/i915 hw the IIR and IER are 16bit on i9xx its 32bit */
 618         if (IS_I9XX(dev) && !IS_I915G(dev) && !IS_I915GM(dev))
 619                 iir = I915_READ(I915REG_INT_IDENTITY_R);
 620         else
 621                 iir = I915_READ16(I915REG_INT_IDENTITY_R);
 622
 623         iir &= (dev_priv->irq_enable_reg | I915_USER_INTERRUPT);
 624
 625 #if 0
 626         DRM_DEBUG("flag=%08x\n", iir);
 627 #endif
 628         if (iir == 0) {
 629 #if 0
 630                 DRM_DEBUG ("iir 0x%08x im 0x%08x ie 0x%08x pipea 0x%08x pipeb 0x%08x\n",
 631                            iir,
 632                            I915_READ(I915REG_INT_MASK_R),
 633                            I915_READ(I915REG_INT_ENABLE_R),
 634                            I915_READ(I915REG_PIPEASTAT),
 635                            I915_READ(I915REG_PIPEBSTAT));
 636 #endif
 637                 return IRQ_NONE;
 638         }
 639
 640         /*
 641          * Clear the PIPE(A|B)STAT regs before the IIR otherwise
 642          * we may get extra interrupts.
 643          */
 644         if (iir & I915_DISPLAY_PIPE_A_EVENT_INTERRUPT) {
 645                 pipea_stats = I915_READ(I915REG_PIPEASTAT);
 646                 if (pipea_stats & (I915_START_VBLANK_INTERRUPT_STATUS|
 647                                    I915_VBLANK_INTERRUPT_STATUS))
 648                 {
 649                         vblank++;
 650                         drm_handle_vblank(dev, i915_get_plane(dev, 0));
 651                 }
 652
 653                 /* This is a global event, and not a pipe A event */
 654                 if ((pipea_stats & I915_HOTPLUG_INTERRUPT_STATUS) ||
 655                     (pipea_stats & I915_HOTPLUG_TV_INTERRUPT_STATUS))
 656                         hotplug = 1;
 657
 658                 I915_WRITE(I915REG_PIPEASTAT, pipea_stats);
 659         }
 660
 661         if (iir & I915_DISPLAY_PIPE_B_EVENT_INTERRUPT) {
 662                 pipeb_stats = I915_READ(I915REG_PIPEBSTAT);
 663                 if (pipeb_stats & (I915_START_VBLANK_INTERRUPT_STATUS|
 664                                    I915_VBLANK_INTERRUPT_STATUS))
 665                 {
 666                         vblank++;
 667                         drm_handle_vblank(dev, i915_get_plane(dev, 1));
 668                 }
 669                 I915_WRITE(I915REG_PIPEBSTAT, pipeb_stats);
 670         }
 671
 672         /* Clear the generated interrupt */
 673         if (IS_I9XX(dev) && !IS_I915G(dev) && !IS_I915GM(dev)) {
 674                 I915_WRITE(I915REG_INT_IDENTITY_R, iir);
 675                 (void) I915_READ(I915REG_INT_IDENTITY_R);
 676         } else {
 677                 I915_WRITE16(I915REG_INT_IDENTITY_R, iir);
 678                 (void) I915_READ16(I915REG_INT_IDENTITY_R);
 679         }
 680
 681         if (dev->primary->master) {
 682                 master_priv = dev->primary->master->driver_priv;
 683                 master_priv->sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
 684         }
 685
 686         if (iir & I915_USER_INTERRUPT) {
 687                 DRM_WAKEUP(&dev_priv->irq_queue);
 688 #ifdef I915_HAVE_FENCE
 689                 i915_fence_handler(dev);
 690 #endif
 691         }
 692
 693         if (vblank) {
 694                 if (dev_priv->swaps_pending > 0)
 695                         drm_locked_tasklet(dev, i915_vblank_tasklet);
 696         }
 697
 698         if ((iir & I915_DISPLAY_PORT_INTERRUPT) || hotplug) {
 699                 u32 temp2 = 0;
 700
 701                 DRM_INFO("Hotplug event received\n");
 702
 703                 if (!IS_I9XX(dev) || IS_I915G(dev) || IS_I915GM(dev)) {
 704                         if (pipea_stats & I915_HOTPLUG_INTERRUPT_STATUS)
 705                                 temp2 |= SDVOB_HOTPLUG_INT_STATUS |
 706                                         SDVOC_HOTPLUG_INT_STATUS;
 707                         if (pipea_stats & I915_HOTPLUG_TV_INTERRUPT_STATUS)
 708                                 temp2 |= TV_HOTPLUG_INT_STATUS;
 709                 } else {
 710                         temp2 = I915_READ(PORT_HOTPLUG_STAT);
 711
 712                         I915_WRITE(PORT_HOTPLUG_STAT, temp2);
 713                 }
 714                 i915_run_hotplug_tasklet(dev, temp2);
 715         }
 716
 717         return IRQ_HANDLED;
 718 }
 719
 720 int i915_emit_irq(struct drm_device *dev)
 721 {
 722         struct drm_i915_private *dev_priv = dev->dev_private;
 723         RING_LOCALS;
 724
 725         i915_kernel_lost_context(dev);
 726
 727         DRM_DEBUG("\n");
 728
 729         i915_emit_breadcrumb(dev);
 730
 731         BEGIN_LP_RING(2);
 732         OUT_RING(0);
 733         OUT_RING(GFX_OP_USER_INTERRUPT);
 734         ADVANCE_LP_RING();
 735
 736         return dev_priv->counter;
 737 }
 738
 739 void i915_user_irq_on(struct drm_device *dev)
 740 {
 741         struct drm_i915_private *dev_priv = (struct drm_i915_private *) dev->dev_private;
 742
 743         DRM_SPINLOCK(&dev_priv->user_irq_lock);
 744         if (dev_priv->irq_enabled && (++dev_priv->user_irq_refcount == 1)){
 745                 dev_priv->irq_enable_reg |= I915_USER_INTERRUPT;
 746                 if (IS_I9XX(dev) && !IS_I915G(dev) && !IS_I915GM(dev))
 747                         I915_WRITE(I915REG_INT_ENABLE_R, dev_priv->irq_enable_reg);
 748                 else
 749                         I915_WRITE16(I915REG_INT_ENABLE_R, dev_priv->irq_enable_reg);
 750         }
 751         DRM_SPINUNLOCK(&dev_priv->user_irq_lock);
 752
 753 }
 754
 755 void i915_user_irq_off(struct drm_device *dev)
 756 {
 757         struct drm_i915_private *dev_priv = (struct drm_i915_private *) dev->dev_private;
 758
 759         DRM_SPINLOCK(&dev_priv->user_irq_lock);
 760         if (dev_priv->irq_enabled && (--dev_priv->user_irq_refcount == 0)) {
 761                 //              dev_priv->irq_enable_reg &= ~I915_USER_INTERRUPT;
 762                 //              if (IS_I9XX(dev) && !IS_I915G(dev) && !IS_I915GM(dev))
 763                 //                      I915_WRITE(I915REG_INT_ENABLE_R, dev_priv->irq_enable_reg);
 764                 //              else
 765                 //                      I915_WRITE16(I915REG_INT_ENABLE_R, dev_priv->irq_enable_reg);
 766         }
 767         DRM_SPINUNLOCK(&dev_priv->user_irq_lock);
 768 }
 769
 770
 771 static int i915_wait_irq(struct drm_device * dev, int irq_nr)
 772 {
 773         struct drm_i915_private *dev_priv = (struct drm_i915_private *) dev->dev_private;
 774         struct drm_i915_master_private *master_priv;
 775         int ret = 0;
 776
 777         DRM_DEBUG("irq_nr=%d breadcrumb=%d\n", irq_nr,
 778                   READ_BREADCRUMB(dev_priv));
 779
 780         if (READ_BREADCRUMB(dev_priv) >= irq_nr)
 781                 return 0;
 782
 783         i915_user_irq_on(dev);
 784         DRM_WAIT_ON(ret, dev_priv->irq_queue, 3 * DRM_HZ,
 785                     READ_BREADCRUMB(dev_priv) >= irq_nr);
 786         i915_user_irq_off(dev);
 787
 788         if (ret == -EBUSY) {
 789                 DRM_ERROR("EBUSY -- rec: %d emitted: %d\n",
 790                           READ_BREADCRUMB(dev_priv), (int)dev_priv->counter);
 791         }
 792
 793         if (dev->primary->master) {
 794                 master_priv = dev->primary->master->driver_priv;
 795                 master_priv->sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
 796         }
 797
 798         return ret;
 799 }
 800
 801 /* Needs the lock as it touches the ring.
 802  */
 803 int i915_irq_emit(struct drm_device *dev, void *data,
 804                          struct drm_file *file_priv)
 805 {
 806         struct drm_i915_private *dev_priv = dev->dev_private;
 807         struct drm_i915_irq_emit *emit = data;
 808         int result;
 809
 810         LOCK_TEST_WITH_RETURN(dev, file_priv);
 811
 812         if (!dev_priv) {
 813                 DRM_ERROR("called with no initialization\n");
 814                 return -EINVAL;
 815         }
 816
 817         result = i915_emit_irq(dev);
 818
 819         if (DRM_COPY_TO_USER(emit->irq_seq, &result, sizeof(int))) {
 820                 DRM_ERROR("copy_to_user\n");
 821                 return -EFAULT;
 822         }
 823
 824         return 0;
 825 }
 826
 827 /* Doesn't need the hardware lock.
 828  */
 829 int i915_irq_wait(struct drm_device *dev, void *data,
 830                   struct drm_file *file_priv)
 831 {
 832         struct drm_i915_private *dev_priv = dev->dev_private;
 833         struct drm_i915_irq_wait *irqwait = data;
 834
 835         if (!dev_priv) {
 836                 DRM_ERROR("called with no initialization\n");
 837                 return -EINVAL;
 838         }
 839
 840         return i915_wait_irq(dev, irqwait->irq_seq);
 841 }
 842
 843 int i915_enable_vblank(struct drm_device *dev, int plane)
 844 {
 845         struct drm_i915_private *dev_priv = (struct drm_i915_private *) dev->dev_private;
 846         int pipe = i915_get_pipe(dev, plane);
 847         u32     pipestat_reg = 0;
 848         u32     pipestat;
 849
 850         switch (pipe) {
 851         case 0:
 852                 pipestat_reg = I915REG_PIPEASTAT;
 853                 dev_priv->irq_enable_reg |= I915_DISPLAY_PIPE_A_EVENT_INTERRUPT;
 854                 break;
 855         case 1:
 856                 pipestat_reg = I915REG_PIPEBSTAT;
 857                 dev_priv->irq_enable_reg |= I915_DISPLAY_PIPE_B_EVENT_INTERRUPT;
 858                 break;
 859         default:
 860                 DRM_ERROR("tried to enable vblank on non-existent pipe %d\n",
 861                           pipe);
 862                 break;
 863         }
 864
 865         if (pipestat_reg)
 866         {
 867                 pipestat = I915_READ (pipestat_reg);
 868                 /*
 869                  * Older chips didn't have the start vblank interrupt,
 870                  * but
 871                  */
 872                 if (IS_I965G (dev))
 873                         pipestat |= I915_START_VBLANK_INTERRUPT_ENABLE;
 874                 else
 875                         pipestat |= I915_VBLANK_INTERRUPT_ENABLE;
 876                 /*
 877                  * Clear any pending status
 878                  */
 879                 pipestat |= (I915_START_VBLANK_INTERRUPT_STATUS |
 880                              I915_VBLANK_INTERRUPT_STATUS);
 881                 I915_WRITE(pipestat_reg, pipestat);
 882         }
 883
 884         if (IS_I9XX(dev) && !IS_I915G(dev) && !IS_I915GM(dev))
 885                 I915_WRITE(I915REG_INT_ENABLE_R, dev_priv->irq_enable_reg);
 886         else
 887                 I915_WRITE16(I915REG_INT_ENABLE_R, dev_priv->irq_enable_reg);
 888
 889
 890         return 0;
 891 }
 892
 893 void i915_disable_vblank(struct drm_device *dev, int plane)
 894 {
 895         struct drm_i915_private *dev_priv = (struct drm_i915_private *) dev->dev_private;
 896         int pipe = i915_get_pipe(dev, plane);
 897         u32     pipestat_reg = 0;
 898         u32     pipestat;
 899
 900         switch (pipe) {
 901         case 0:
 902                 pipestat_reg = I915REG_PIPEASTAT;
 903                 dev_priv->irq_enable_reg &= ~I915_DISPLAY_PIPE_A_EVENT_INTERRUPT;
 904                 break;
 905         case 1:
 906                 pipestat_reg = I915REG_PIPEBSTAT;
 907                 dev_priv->irq_enable_reg &= ~I915_DISPLAY_PIPE_B_EVENT_INTERRUPT;
 908                 break;
 909         default:
 910                 DRM_ERROR("tried to disable vblank on non-existent pipe %d\n",
 911                           pipe);
 912                 break;
 913         }
 914
 915         if (IS_I9XX(dev) && !IS_I915G(dev) && !IS_I915GM(dev))
 916                 I915_WRITE(I915REG_INT_ENABLE_R, dev_priv->irq_enable_reg);
 917         else
 918                 I915_WRITE16(I915REG_INT_ENABLE_R, dev_priv->irq_enable_reg);
 919
 920         if (pipestat_reg)
 921         {
 922                 pipestat = I915_READ (pipestat_reg);
 923                 pipestat &= ~(I915_START_VBLANK_INTERRUPT_ENABLE |
 924                               I915_VBLANK_INTERRUPT_ENABLE);
 925                 /*
 926                  * Clear any pending status
 927                  */
 928                 pipestat |= (I915_START_VBLANK_INTERRUPT_STATUS |
 929                              I915_VBLANK_INTERRUPT_STATUS);
 930                 I915_WRITE(pipestat_reg, pipestat);
 931         }
 932 }
 933
 934 void i915_enable_interrupt (struct drm_device *dev)
 935 {
 936         struct drm_i915_private *dev_priv = (struct drm_i915_private *) dev->dev_private;
 937         struct drm_output *o;
 938
 939         dev_priv->irq_enable_reg |= I915_USER_INTERRUPT;
 940
 941         if (IS_I9XX(dev) && !IS_I915G(dev) && !IS_I915GM(dev)) {
 942                 if (dev->mode_config.num_output)
 943                         dev_priv->irq_enable_reg |= I915_DISPLAY_PORT_INTERRUPT;
 944         } else {
 945                 if (dev->mode_config.num_output)
 946                         dev_priv->irq_enable_reg |= I915_DISPLAY_PIPE_A_EVENT_INTERRUPT;
 947
 948                 /* Enable global interrupts for hotplug - not a pipeA event */
 949                 I915_WRITE(I915REG_PIPEASTAT, I915_READ(I915REG_PIPEASTAT) |
 950                            I915_HOTPLUG_INTERRUPT_ENABLE |
 951                            I915_HOTPLUG_TV_INTERRUPT_ENABLE |
 952                            I915_HOTPLUG_TV_CLEAR |
 953                            I915_HOTPLUG_CLEAR);
 954         }
 955
 956         if (dev_priv->irq_enable_reg & (I915_DISPLAY_PORT_INTERRUPT | I915_DISPLAY_PIPE_A_EVENT_INTERRUPT)) {
 957                 u32 temp = 0;
 958
 959                 if (IS_I9XX(dev) && !IS_I915G(dev) && !IS_I915GM(dev)) {
 960                         temp = I915_READ(PORT_HOTPLUG_EN);
 961
 962                         /* Activate the CRT */
 963                         temp |= CRT_HOTPLUG_INT_EN;
 964                 }
 965
 966                 if (IS_I9XX(dev)) {
 967                         /* SDVOB */
 968                         o = intel_sdvo_find(dev, 1);
 969                         if (o && intel_sdvo_supports_hotplug(o)) {
 970                                 intel_sdvo_set_hotplug(o, 1);
 971                                 temp |= SDVOB_HOTPLUG_INT_EN;
 972                         }
 973
 974                         /* SDVOC */
 975                         o = intel_sdvo_find(dev, 0);
 976                         if (o && intel_sdvo_supports_hotplug(o)) {
 977                                 intel_sdvo_set_hotplug(o, 1);
 978                                 temp |= SDVOC_HOTPLUG_INT_EN;
 979                         }
 980
 981                         I915_WRITE(SDVOB, I915_READ(SDVOB) | SDVO_INTERRUPT_ENABLE);
 982                         I915_WRITE(SDVOC, I915_READ(SDVOC) | SDVO_INTERRUPT_ENABLE);
 983                 } else {
 984                         /* DVO ???? */
 985                 }
 986
 987                 if (IS_I9XX(dev) && !IS_I915G(dev) && !IS_I915GM(dev)) {
 988                         I915_WRITE(PORT_HOTPLUG_EN, temp);
 989
 990                         DRM_DEBUG("HEN %08x\n",I915_READ(PORT_HOTPLUG_EN));
 991                         DRM_DEBUG("HST %08x\n",I915_READ(PORT_HOTPLUG_STAT));
 992
 993                         I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
 994                 }
 995         }
 996
 997         if (IS_I9XX(dev) && !IS_I915G(dev) && !IS_I915GM(dev))
 998                 I915_WRITE(I915REG_INT_ENABLE_R, dev_priv->irq_enable_reg);
 999         else
1000                 I915_WRITE16(I915REG_INT_ENABLE_R, dev_priv->irq_enable_reg);
1001
1002         dev_priv->irq_enabled = 1;
1003 }
1004
1005 /* Set the vblank monitor pipe
1006  */
1007 int i915_vblank_pipe_set(struct drm_device *dev, void *data,
1008                          struct drm_file *file_priv)
1009 {
1010         struct drm_i915_private *dev_priv = dev->dev_private;
1011         struct drm_i915_vblank_pipe *pipe = data;
1012
1013         if (!dev_priv) {
1014                 DRM_ERROR("called with no initialization\n");
1015                 return -EINVAL;
1016         }
1017
1018         if (pipe->pipe & ~(DRM_I915_VBLANK_PIPE_A|DRM_I915_VBLANK_PIPE_B)) {
1019                 DRM_ERROR("called with invalid pipe 0x%x\n", pipe->pipe);
1020                 return -EINVAL;
1021         }
1022
1023         dev_priv->vblank_pipe = pipe->pipe;
1024
1025         return 0;
1026 }
1027
1028 int i915_vblank_pipe_get(struct drm_device *dev, void *data,
1029                          struct drm_file *file_priv)
1030 {
1031         struct drm_i915_private *dev_priv = dev->dev_private;
1032         struct drm_i915_vblank_pipe *pipe = data;
1033         u16 flag;
1034
1035         if (!dev_priv) {
1036                 DRM_ERROR("called with no initialization\n");
1037                 return -EINVAL;
1038         }
1039
1040         if (IS_I9XX(dev) && !IS_I915G(dev) && !IS_I915GM(dev))
1041                 flag = I915_READ(I915REG_INT_ENABLE_R);
1042         else
1043                 flag = I915_READ16(I915REG_INT_ENABLE_R);
1044
1045         pipe->pipe = 0;
1046         if (flag & I915_DISPLAY_PIPE_A_EVENT_INTERRUPT)
1047                 pipe->pipe |= DRM_I915_VBLANK_PIPE_A;
1048         if (flag & I915_DISPLAY_PIPE_B_EVENT_INTERRUPT)
1049                 pipe->pipe |= DRM_I915_VBLANK_PIPE_B;
1050
1051         return 0;
1052 }
1053
1054 /**
1055  * Schedule buffer swap at given vertical blank.
1056  */
1057 int i915_vblank_swap(struct drm_device *dev, void *data,
1058                      struct drm_file *file_priv)
1059 {
1060         struct drm_i915_private *dev_priv = dev->dev_private;
1061         struct drm_i915_master_private *master_priv;
1062         struct drm_i915_vblank_swap *swap = data;
1063         struct drm_i915_vbl_swap *vbl_swap;
1064         unsigned int pipe, seqtype, curseq, plane;
1065         unsigned long irqflags;
1066         struct list_head *list;
1067         int ret;
1068
1069         if (!dev_priv) {
1070                 DRM_ERROR("%s called with no initialization\n", __func__);
1071                 return -EINVAL;
1072         }
1073
1074         if (!dev->primary->master)
1075                 return -EINVAL;
1076
1077         master_priv = dev->primary->master->driver_priv;
1078
1079         if (master_priv->sarea_priv->rotation) {
1080                 DRM_DEBUG("Rotation not supported\n");
1081                 return -EINVAL;
1082         }
1083
1084         if (swap->seqtype & ~(_DRM_VBLANK_RELATIVE | _DRM_VBLANK_ABSOLUTE |
1085                              _DRM_VBLANK_SECONDARY | _DRM_VBLANK_NEXTONMISS |
1086                              _DRM_VBLANK_FLIP)) {
1087                 DRM_ERROR("Invalid sequence type 0x%x\n", swap->seqtype);
1088                 return -EINVAL;
1089         }
1090
1091         plane = (swap->seqtype & _DRM_VBLANK_SECONDARY) ? 1 : 0;
1092         pipe = i915_get_pipe(dev, plane);
1093
1094         seqtype = swap->seqtype & (_DRM_VBLANK_RELATIVE | _DRM_VBLANK_ABSOLUTE);
1095
1096         if (!(dev_priv->vblank_pipe & (1 << pipe))) {
1097                 DRM_ERROR("Invalid pipe %d\n", pipe);
1098                 return -EINVAL;
1099         }
1100
1101         DRM_SPINLOCK_IRQSAVE(&dev->drw_lock, irqflags);
1102
1103         /* It makes no sense to schedule a swap for a drawable that doesn't have
1104          * valid information at this point. E.g. this could mean that the X
1105          * server is too old to push drawable information to the DRM, in which
1106          * case all such swaps would become ineffective.
1107          */
1108         if (!drm_get_drawable_info(dev, swap->drawable)) {
1109                 DRM_SPINUNLOCK_IRQRESTORE(&dev->drw_lock, irqflags);
1110                 DRM_DEBUG("Invalid drawable ID %d\n", swap->drawable);
1111                 return -EINVAL;
1112         }
1113
1114         DRM_SPINUNLOCK_IRQRESTORE(&dev->drw_lock, irqflags);
1115
1116         drm_update_vblank_count(dev, pipe);
1117         curseq = drm_vblank_count(dev, pipe);
1118
1119         if (seqtype == _DRM_VBLANK_RELATIVE)
1120                 swap->sequence += curseq;
1121
1122         if ((curseq - swap->sequence) <= (1<<23)) {
1123                 if (swap->seqtype & _DRM_VBLANK_NEXTONMISS) {
1124                         swap->sequence = curseq + 1;
1125                 } else {
1126                         DRM_DEBUG("Missed target sequence\n");
1127                         return -EINVAL;
1128                 }
1129         }
1130
1131         if (swap->seqtype & _DRM_VBLANK_FLIP) {
1132                 swap->sequence--;
1133
1134                 if ((curseq - swap->sequence) <= (1<<23)) {
1135                         struct drm_drawable_info *drw;
1136
1137                         LOCK_TEST_WITH_RETURN(dev, file_priv);
1138
1139                         DRM_SPINLOCK_IRQSAVE(&dev->drw_lock, irqflags);
1140
1141                         drw = drm_get_drawable_info(dev, swap->drawable);
1142
1143                         if (!drw) {
1144                                 DRM_SPINUNLOCK_IRQRESTORE(&dev->drw_lock,
1145                                     irqflags);
1146                                 DRM_DEBUG("Invalid drawable ID %d\n",
1147                                           swap->drawable);
1148                                 return -EINVAL;
1149                         }
1150
1151                         i915_dispatch_vsync_flip(dev, drw, plane);
1152
1153                         DRM_SPINUNLOCK_IRQRESTORE(&dev->drw_lock, irqflags);
1154
1155                         return 0;
1156                 }
1157         }
1158
1159         DRM_SPINLOCK_IRQSAVE(&dev_priv->swaps_lock, irqflags);
1160
1161         list_for_each(list, &dev_priv->vbl_swaps.head) {
1162                 vbl_swap = list_entry(list, struct drm_i915_vbl_swap, head);
1163
1164                 if (vbl_swap->drw_id == swap->drawable &&
1165                     vbl_swap->plane == plane &&
1166                     vbl_swap->sequence == swap->sequence) {
1167                         vbl_swap->flip = (swap->seqtype & _DRM_VBLANK_FLIP);
1168                         DRM_SPINUNLOCK_IRQRESTORE(&dev_priv->swaps_lock, irqflags);
1169                         DRM_DEBUG("Already scheduled\n");
1170                         return 0;
1171                 }
1172         }
1173
1174         DRM_SPINUNLOCK_IRQRESTORE(&dev_priv->swaps_lock, irqflags);
1175
1176         if (dev_priv->swaps_pending >= 100) {
1177                 DRM_DEBUG("Too many swaps queued\n");
1178                 return -EBUSY;
1179         }
1180
1181         vbl_swap = drm_calloc(1, sizeof(*vbl_swap), DRM_MEM_DRIVER);
1182
1183         if (!vbl_swap) {
1184                 DRM_ERROR("Failed to allocate memory to queue swap\n");
1185                 return -ENOMEM;
1186         }
1187
1188         DRM_DEBUG("\n");
1189
1190         ret = drm_vblank_get(dev, pipe);
1191         if (ret) {
1192                 drm_free(vbl_swap, sizeof(*vbl_swap), DRM_MEM_DRIVER);
1193                 return ret;
1194         }
1195
1196         vbl_swap->drw_id = swap->drawable;
1197         vbl_swap->plane = plane;
1198         vbl_swap->sequence = swap->sequence;
1199         vbl_swap->flip = (swap->seqtype & _DRM_VBLANK_FLIP);
1200         vbl_swap->minor = file_priv->minor;
1201
1202         if (vbl_swap->flip)
1203                 swap->sequence++;
1204
1205         DRM_SPINLOCK_IRQSAVE(&dev_priv->swaps_lock, irqflags);
1206
1207         list_add_tail(&vbl_swap->head, &dev_priv->vbl_swaps.head);
1208         dev_priv->swaps_pending++;
1209
1210         DRM_SPINUNLOCK_IRQRESTORE(&dev_priv->swaps_lock, irqflags);
1211
1212         return 0;
1213 }
1214
1215 /* drm_dma.h hooks
1216 */
1217 void i915_driver_irq_preinstall(struct drm_device * dev)
1218 {
1219         struct drm_i915_private *dev_priv = (struct drm_i915_private *) dev->dev_private;
1220
1221         I915_WRITE16(I915REG_HWSTAM, 0xeffe);
1222         if (IS_I9XX(dev) && !IS_I915G(dev) && !IS_I915GM(dev)) {
1223                 I915_WRITE(I915REG_INT_MASK_R, 0x0);
1224                 I915_WRITE(I915REG_INT_ENABLE_R, 0x0);
1225         } else {
1226                 I915_WRITE16(I915REG_INT_MASK_R, 0x0);
1227                 I915_WRITE16(I915REG_INT_ENABLE_R, 0x0);
1228         }
1229
1230 }
1231
1232 int i915_driver_irq_postinstall(struct drm_device * dev)
1233 {
1234         struct drm_i915_private *dev_priv = (struct drm_i915_private *) dev->dev_private;
1235         int ret, num_pipes = 2;
1236
1237         DRM_SPININIT(&dev_priv->swaps_lock, "swap");
1238         INIT_LIST_HEAD(&dev_priv->vbl_swaps.head);
1239         dev_priv->swaps_pending = 0;
1240
1241         DRM_SPININIT(&dev_priv->user_irq_lock, "userirq");
1242         dev_priv->user_irq_refcount = 0;
1243         dev_priv->irq_enable_reg = 0;
1244
1245         ret = drm_vblank_init(dev, num_pipes);
1246         if (ret)
1247                 return ret;
1248
1249         ret = drm_hotplug_init(dev);
1250         if (ret)
1251                 return ret;
1252
1253         dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */
1254
1255         i915_enable_interrupt(dev);
1256         DRM_INIT_WAITQUEUE(&dev_priv->irq_queue);
1257
1258         /*
1259          * Initialize the hardware status page IRQ location.
1260          */
1261
1262         I915_WRITE(I915REG_INSTPM, (1 << 5) | (1 << 21));
1263         return 0;
1264 }
1265
1266 void i915_driver_irq_uninstall(struct drm_device * dev)
1267 {
1268         struct drm_i915_private *dev_priv = (struct drm_i915_private *) dev->dev_private;
1269         u32 temp;
1270
1271         if (!dev_priv)
1272                 return;
1273
1274         dev_priv->irq_enabled = 0;
1275
1276         temp = I915_READ(I915REG_PIPEASTAT);
1277         I915_WRITE(I915REG_PIPEASTAT, temp);
1278         temp = I915_READ(I915REG_PIPEBSTAT);
1279         I915_WRITE(I915REG_PIPEBSTAT, temp);
1280         if (IS_I9XX(dev) && !IS_I915G(dev) && !IS_I915GM(dev)) {
1281                 I915_WRITE(I915REG_HWSTAM, 0xffffffff);
1282                 I915_WRITE(I915REG_INT_MASK_R, 0xffffffff);
1283                 I915_WRITE(I915REG_INT_ENABLE_R, 0x0);
1284
1285                 temp = I915_READ(I915REG_INT_IDENTITY_R);
1286                 I915_WRITE(I915REG_INT_IDENTITY_R, temp);
1287         } else {
1288                 I915_WRITE16(I915REG_HWSTAM, 0xffff);
1289                 I915_WRITE16(I915REG_INT_MASK_R, 0xffff);
1290                 I915_WRITE16(I915REG_INT_ENABLE_R, 0x0);
1291
1292                 temp = I915_READ16(I915REG_INT_IDENTITY_R);
1293                 I915_WRITE16(I915REG_INT_IDENTITY_R, temp);
1294         }
1295 }