drivers/char/drm/i915_dma.c

   1 /* i915_dma.c -- DMA 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
  34 /* Really want an OS-independent resettable timer.  Would like to have
  35  * this loop run for (eg) 3 sec, but have the timer reset every time
  36  * the head pointer changes, so that EBUSY only happens if the ring
  37  * actually stalls for (eg) 3 seconds.
  38  */
  39 int i915_wait_ring(struct drm_device * dev, int n, const char *caller)
  40 {
  41         drm_i915_private_t *dev_priv = dev->dev_private;
  42         drm_i915_ring_buffer_t *ring = &(dev_priv->ring);
  43         u32 last_head = I915_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
  44         int i;
  45
  46         for (i = 0; i < 10000; i++) {
  47                 ring->head = I915_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
  48                 ring->space = ring->head - (ring->tail + 8);
  49                 if (ring->space < 0)
  50                         ring->space += ring->Size;
  51                 if (ring->space >= n)
  52                         return 0;
  53
  54                 dev_priv->sarea_priv->perf_boxes |= I915_BOX_WAIT;
  55
  56                 if (ring->head != last_head)
  57                         i = 0;
  58
  59                 last_head = ring->head;
  60         }
  61
  62         return -EBUSY;
  63 }
  64
  65 void i915_kernel_lost_context(struct drm_device * dev)
  66 {
  67         drm_i915_private_t *dev_priv = dev->dev_private;
  68         drm_i915_ring_buffer_t *ring = &(dev_priv->ring);
  69
  70         ring->head = I915_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
  71         ring->tail = I915_READ(LP_RING + RING_TAIL) & TAIL_ADDR;
  72         ring->space = ring->head - (ring->tail + 8);
  73         if (ring->space < 0)
  74                 ring->space += ring->Size;
  75
  76         if (ring->head == ring->tail)
  77                 dev_priv->sarea_priv->perf_boxes |= I915_BOX_RING_EMPTY;
  78 }
  79
  80 static int i915_dma_cleanup(struct drm_device * dev)
  81 {
  82         drm_i915_private_t *dev_priv = dev->dev_private;
  83         /* Make sure interrupts are disabled here because the uninstall ioctl
  84          * may not have been called from userspace and after dev_private
  85          * is freed, it's too late.
  86          */
  87         if (dev->irq)
  88                 drm_irq_uninstall(dev);
  89
  90         if (dev_priv->ring.virtual_start) {
  91                 drm_core_ioremapfree(&dev_priv->ring.map, dev);
  92                 dev_priv->ring.virtual_start = 0;
  93                 dev_priv->ring.map.handle = 0;
  94                 dev_priv->ring.map.size = 0;
  95         }
  96
  97         if (dev_priv->status_page_dmah) {
  98                 drm_pci_free(dev, dev_priv->status_page_dmah);
  99                 dev_priv->status_page_dmah = NULL;
 100                 /* Need to rewrite hardware status page */
 101                 I915_WRITE(0x02080, 0x1ffff000);
 102         }
 103
 104         if (dev_priv->status_gfx_addr) {
 105                 dev_priv->status_gfx_addr = 0;
 106                 drm_core_ioremapfree(&dev_priv->hws_map, dev);
 107                 I915_WRITE(0x2080, 0x1ffff000);
 108         }
 109
 110         return 0;
 111 }
 112
 113 static int i915_initialize(struct drm_device * dev, drm_i915_init_t * init)
 114 {
 115         drm_i915_private_t *dev_priv = dev->dev_private;
 116
 117         dev_priv->sarea = drm_getsarea(dev);
 118         if (!dev_priv->sarea) {
 119                 DRM_ERROR("can not find sarea!\n");
 120                 i915_dma_cleanup(dev);
 121                 return -EINVAL;
 122         }
 123
 124         dev_priv->mmio_map = drm_core_findmap(dev, init->mmio_offset);
 125         if (!dev_priv->mmio_map) {
 126                 i915_dma_cleanup(dev);
 127                 DRM_ERROR("can not find mmio map!\n");
 128                 return -EINVAL;
 129         }
 130
 131         dev_priv->sarea_priv = (drm_i915_sarea_t *)
 132             ((u8 *) dev_priv->sarea->handle + init->sarea_priv_offset);
 133
 134         dev_priv->ring.Start = init->ring_start;
 135         dev_priv->ring.End = init->ring_end;
 136         dev_priv->ring.Size = init->ring_size;
 137         dev_priv->ring.tail_mask = dev_priv->ring.Size - 1;
 138
 139         dev_priv->ring.map.offset = init->ring_start;
 140         dev_priv->ring.map.size = init->ring_size;
 141         dev_priv->ring.map.type = 0;
 142         dev_priv->ring.map.flags = 0;
 143         dev_priv->ring.map.mtrr = 0;
 144
 145         drm_core_ioremap(&dev_priv->ring.map, dev);
 146
 147         if (dev_priv->ring.map.handle == NULL) {
 148                 i915_dma_cleanup(dev);
 149                 DRM_ERROR("can not ioremap virtual address for"
 150                           " ring buffer\n");
 151                 return -ENOMEM;
 152         }
 153
 154         dev_priv->ring.virtual_start = dev_priv->ring.map.handle;
 155
 156         dev_priv->cpp = init->cpp;
 157         dev_priv->back_offset = init->back_offset;
 158         dev_priv->front_offset = init->front_offset;
 159         dev_priv->current_page = 0;
 160         dev_priv->sarea_priv->pf_current_page = dev_priv->current_page;
 161
 162         /* We are using separate values as placeholders for mechanisms for
 163          * private backbuffer/depthbuffer usage.
 164          */
 165         dev_priv->use_mi_batchbuffer_start = 0;
 166         if (IS_I965G(dev)) /* 965 doesn't support older method */
 167                 dev_priv->use_mi_batchbuffer_start = 1;
 168
 169         /* Allow hardware batchbuffers unless told otherwise.
 170          */
 171         dev_priv->allow_batchbuffer = 1;
 172
 173         /* Program Hardware Status Page */
 174         if (!I915_NEED_GFX_HWS(dev)) {
 175                 dev_priv->status_page_dmah =
 176                         drm_pci_alloc(dev, PAGE_SIZE, PAGE_SIZE, 0xffffffff);
 177
 178                 if (!dev_priv->status_page_dmah) {
 179                         i915_dma_cleanup(dev);
 180                         DRM_ERROR("Can not allocate hardware status page\n");
 181                         return -ENOMEM;
 182                 }
 183                 dev_priv->hw_status_page = dev_priv->status_page_dmah->vaddr;
 184                 dev_priv->dma_status_page = dev_priv->status_page_dmah->busaddr;
 185
 186                 memset(dev_priv->hw_status_page, 0, PAGE_SIZE);
 187                 I915_WRITE(0x02080, dev_priv->dma_status_page);
 188         }
 189         DRM_DEBUG("Enabled hardware status page\n");
 190         return 0;
 191 }
 192
 193 static int i915_dma_resume(struct drm_device * dev)
 194 {
 195         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 196
 197         DRM_DEBUG("%s\n", __func__);
 198
 199         if (!dev_priv->sarea) {
 200                 DRM_ERROR("can not find sarea!\n");
 201                 return -EINVAL;
 202         }
 203
 204         if (!dev_priv->mmio_map) {
 205                 DRM_ERROR("can not find mmio map!\n");
 206                 return -EINVAL;
 207         }
 208
 209         if (dev_priv->ring.map.handle == NULL) {
 210                 DRM_ERROR("can not ioremap virtual address for"
 211                           " ring buffer\n");
 212                 return -ENOMEM;
 213         }
 214
 215         /* Program Hardware Status Page */
 216         if (!dev_priv->hw_status_page) {
 217                 DRM_ERROR("Can not find hardware status page\n");
 218                 return -EINVAL;
 219         }
 220         DRM_DEBUG("hw status page @ %p\n", dev_priv->hw_status_page);
 221
 222         if (dev_priv->status_gfx_addr != 0)
 223                 I915_WRITE(0x02080, dev_priv->status_gfx_addr);
 224         else
 225                 I915_WRITE(0x02080, dev_priv->dma_status_page);
 226         DRM_DEBUG("Enabled hardware status page\n");
 227
 228         return 0;
 229 }
 230
 231 static int i915_dma_init(struct drm_device *dev, void *data,
 232                          struct drm_file *file_priv)
 233 {
 234         drm_i915_init_t *init = data;
 235         int retcode = 0;
 236
 237         switch (init->func) {
 238         case I915_INIT_DMA:
 239                 retcode = i915_initialize(dev, init);
 240                 break;
 241         case I915_CLEANUP_DMA:
 242                 retcode = i915_dma_cleanup(dev);
 243                 break;
 244         case I915_RESUME_DMA:
 245                 retcode = i915_dma_resume(dev);
 246                 break;
 247         default:
 248                 retcode = -EINVAL;
 249                 break;
 250         }
 251
 252         return retcode;
 253 }
 254
 255 /* Implement basically the same security restrictions as hardware does
 256  * for MI_BATCH_NON_SECURE.  These can be made stricter at any time.
 257  *
 258  * Most of the calculations below involve calculating the size of a
 259  * particular instruction.  It's important to get the size right as
 260  * that tells us where the next instruction to check is.  Any illegal
 261  * instruction detected will be given a size of zero, which is a
 262  * signal to abort the rest of the buffer.
 263  */
 264 static int do_validate_cmd(int cmd)
 265 {
 266         switch (((cmd >> 29) & 0x7)) {
 267         case 0x0:
 268                 switch ((cmd >> 23) & 0x3f) {
 269                 case 0x0:
 270                         return 1;       /* MI_NOOP */
 271                 case 0x4:
 272                         return 1;       /* MI_FLUSH */
 273                 default:
 274                         return 0;       /* disallow everything else */
 275                 }
 276                 break;
 277         case 0x1:
 278                 return 0;       /* reserved */
 279         case 0x2:
 280                 return (cmd & 0xff) + 2;        /* 2d commands */
 281         case 0x3:
 282                 if (((cmd >> 24) & 0x1f) <= 0x18)
 283                         return 1;
 284
 285                 switch ((cmd >> 24) & 0x1f) {
 286                 case 0x1c:
 287                         return 1;
 288                 case 0x1d:
 289                         switch ((cmd >> 16) & 0xff) {
 290                         case 0x3:
 291                                 return (cmd & 0x1f) + 2;
 292                         case 0x4:
 293                                 return (cmd & 0xf) + 2;
 294                         default:
 295                                 return (cmd & 0xffff) + 2;
 296                         }
 297                 case 0x1e:
 298                         if (cmd & (1 << 23))
 299                                 return (cmd & 0xffff) + 1;
 300                         else
 301                                 return 1;
 302                 case 0x1f:
 303                         if ((cmd & (1 << 23)) == 0)     /* inline vertices */
 304                                 return (cmd & 0x1ffff) + 2;
 305                         else if (cmd & (1 << 17))       /* indirect random */
 306                                 if ((cmd & 0xffff) == 0)
 307                                         return 0;       /* unknown length, too hard */
 308                                 else
 309                                         return (((cmd & 0xffff) + 1) / 2) + 1;
 310                         else
 311                                 return 2;       /* indirect sequential */
 312                 default:
 313                         return 0;
 314                 }
 315         default:
 316                 return 0;
 317         }
 318
 319         return 0;
 320 }
 321
 322 static int validate_cmd(int cmd)
 323 {
 324         int ret = do_validate_cmd(cmd);
 325
 326 /*      printk("validate_cmd( %x ): %d\n", cmd, ret); */
 327
 328         return ret;
 329 }
 330
 331 static int i915_emit_cmds(struct drm_device * dev, int __user * buffer, int dwords)
 332 {
 333         drm_i915_private_t *dev_priv = dev->dev_private;
 334         int i;
 335         RING_LOCALS;
 336
 337         if ((dwords+1) * sizeof(int) >= dev_priv->ring.Size - 8)
 338                 return -EINVAL;
 339
 340         BEGIN_LP_RING((dwords+1)&~1);
 341
 342         for (i = 0; i < dwords;) {
 343                 int cmd, sz;
 344
 345                 if (DRM_COPY_FROM_USER_UNCHECKED(&cmd, &buffer[i], sizeof(cmd)))
 346                         return -EINVAL;
 347
 348                 if ((sz = validate_cmd(cmd)) == 0 || i + sz > dwords)
 349                         return -EINVAL;
 350
 351                 OUT_RING(cmd);
 352
 353                 while (++i, --sz) {
 354                         if (DRM_COPY_FROM_USER_UNCHECKED(&cmd, &buffer[i],
 355                                                          sizeof(cmd))) {
 356                                 return -EINVAL;
 357                         }
 358                         OUT_RING(cmd);
 359                 }
 360         }
 361
 362         if (dwords & 1)
 363                 OUT_RING(0);
 364
 365         ADVANCE_LP_RING();
 366
 367         return 0;
 368 }
 369
 370 static int i915_emit_box(struct drm_device * dev,
 371                          struct drm_clip_rect __user * boxes,
 372                          int i, int DR1, int DR4)
 373 {
 374         drm_i915_private_t *dev_priv = dev->dev_private;
 375         struct drm_clip_rect box;
 376         RING_LOCALS;
 377
 378         if (DRM_COPY_FROM_USER_UNCHECKED(&box, &boxes[i], sizeof(box))) {
 379                 return -EFAULT;
 380         }
 381
 382         if (box.y2 <= box.y1 || box.x2 <= box.x1 || box.y2 <= 0 || box.x2 <= 0) {
 383                 DRM_ERROR("Bad box %d,%d..%d,%d\n",
 384                           box.x1, box.y1, box.x2, box.y2);
 385                 return -EINVAL;
 386         }
 387
 388         if (IS_I965G(dev)) {
 389                 BEGIN_LP_RING(4);
 390                 OUT_RING(GFX_OP_DRAWRECT_INFO_I965);
 391                 OUT_RING((box.x1 & 0xffff) | (box.y1 << 16));
 392                 OUT_RING(((box.x2 - 1) & 0xffff) | ((box.y2 - 1) << 16));
 393                 OUT_RING(DR4);
 394                 ADVANCE_LP_RING();
 395         } else {
 396                 BEGIN_LP_RING(6);
 397                 OUT_RING(GFX_OP_DRAWRECT_INFO);
 398                 OUT_RING(DR1);
 399                 OUT_RING((box.x1 & 0xffff) | (box.y1 << 16));
 400                 OUT_RING(((box.x2 - 1) & 0xffff) | ((box.y2 - 1) << 16));
 401                 OUT_RING(DR4);
 402                 OUT_RING(0);
 403                 ADVANCE_LP_RING();
 404         }
 405
 406         return 0;
 407 }
 408
 409 /* XXX: Emitting the counter should really be moved to part of the IRQ
 410  * emit. For now, do it in both places:
 411  */
 412
 413 static void i915_emit_breadcrumb(struct drm_device *dev)
 414 {
 415         drm_i915_private_t *dev_priv = dev->dev_private;
 416         RING_LOCALS;
 417
 418         if (++dev_priv->counter > BREADCRUMB_MASK) {
 419                  dev_priv->counter = 1;
 420                  DRM_DEBUG("Breadcrumb counter wrapped around\n");
 421         }
 422
 423         if (dev_priv->sarea_priv)
 424                 dev_priv->sarea_priv->last_enqueue = dev_priv->counter;
 425
 426         BEGIN_LP_RING(4);
 427         OUT_RING(CMD_STORE_DWORD_IDX);
 428         OUT_RING(20);
 429         OUT_RING(dev_priv->counter);
 430         OUT_RING(0);
 431         ADVANCE_LP_RING();
 432 }
 433
 434 int i915_emit_mi_flush(struct drm_device *dev, uint32_t flush)
 435 {
 436         drm_i915_private_t *dev_priv = dev->dev_private;
 437         uint32_t flush_cmd = CMD_MI_FLUSH;
 438         RING_LOCALS;
 439
 440         flush_cmd |= flush;
 441
 442         i915_kernel_lost_context(dev);
 443
 444         BEGIN_LP_RING(4);
 445         OUT_RING(flush_cmd);
 446         OUT_RING(0);
 447         OUT_RING(0);
 448         OUT_RING(0);
 449         ADVANCE_LP_RING();
 450
 451         return 0;
 452 }
 453
 454 static int i915_dispatch_cmdbuffer(struct drm_device * dev,
 455                                    drm_i915_cmdbuffer_t * cmd)
 456 {
 457         int nbox = cmd->num_cliprects;
 458         int i = 0, count, ret;
 459
 460         if (cmd->sz & 0x3) {
 461                 DRM_ERROR("alignment");
 462                 return -EINVAL;
 463         }
 464
 465         i915_kernel_lost_context(dev);
 466
 467         count = nbox ? nbox : 1;
 468
 469         for (i = 0; i < count; i++) {
 470                 if (i < nbox) {
 471                         ret = i915_emit_box(dev, cmd->cliprects, i,
 472                                             cmd->DR1, cmd->DR4);
 473                         if (ret)
 474                                 return ret;
 475                 }
 476
 477                 ret = i915_emit_cmds(dev, (int __user *)cmd->buf, cmd->sz / 4);
 478                 if (ret)
 479                         return ret;
 480         }
 481
 482         i915_emit_breadcrumb(dev);
 483         return 0;
 484 }
 485
 486 static int i915_dispatch_batchbuffer(struct drm_device * dev,
 487                                      drm_i915_batchbuffer_t * batch)
 488 {
 489         drm_i915_private_t *dev_priv = dev->dev_private;
 490         struct drm_clip_rect __user *boxes = batch->cliprects;
 491         int nbox = batch->num_cliprects;
 492         int i = 0, count;
 493         RING_LOCALS;
 494
 495         if ((batch->start | batch->used) & 0x7) {
 496                 DRM_ERROR("alignment");
 497                 return -EINVAL;
 498         }
 499
 500         i915_kernel_lost_context(dev);
 501
 502         count = nbox ? nbox : 1;
 503
 504         for (i = 0; i < count; i++) {
 505                 if (i < nbox) {
 506                         int ret = i915_emit_box(dev, boxes, i,
 507                                                 batch->DR1, batch->DR4);
 508                         if (ret)
 509                                 return ret;
 510                 }
 511
 512                 if (dev_priv->use_mi_batchbuffer_start) {
 513                         BEGIN_LP_RING(2);
 514                         if (IS_I965G(dev)) {
 515                                 OUT_RING(MI_BATCH_BUFFER_START | (2 << 6) | MI_BATCH_NON_SECURE_I965);
 516                                 OUT_RING(batch->start);
 517                         } else {
 518                                 OUT_RING(MI_BATCH_BUFFER_START | (2 << 6));
 519                                 OUT_RING(batch->start | MI_BATCH_NON_SECURE);
 520                         }
 521                         ADVANCE_LP_RING();
 522                 } else {
 523                         BEGIN_LP_RING(4);
 524                         OUT_RING(MI_BATCH_BUFFER);
 525                         OUT_RING(batch->start | MI_BATCH_NON_SECURE);
 526                         OUT_RING(batch->start + batch->used - 4);
 527                         OUT_RING(0);
 528                         ADVANCE_LP_RING();
 529                 }
 530         }
 531
 532         i915_emit_breadcrumb(dev);
 533
 534         return 0;
 535 }
 536
 537 static void i915_do_dispatch_flip(struct drm_device * dev, int plane, int sync)
 538 {
 539         drm_i915_private_t *dev_priv = dev->dev_private;
 540         u32 num_pages, current_page, next_page, dspbase;
 541         int shift = 2 * plane, x, y;
 542         RING_LOCALS;
 543
 544         /* Calculate display base offset */
 545         num_pages = dev_priv->sarea_priv->third_handle ? 3 : 2;
 546         current_page = (dev_priv->sarea_priv->pf_current_page >> shift) & 0x3;
 547         next_page = (current_page + 1) % num_pages;
 548
 549         switch (next_page) {
 550         default:
 551         case 0:
 552                 dspbase = dev_priv->sarea_priv->front_offset;
 553                 break;
 554         case 1:
 555                 dspbase = dev_priv->sarea_priv->back_offset;
 556                 break;
 557         case 2:
 558                 dspbase = dev_priv->sarea_priv->third_offset;
 559                 break;
 560         }
 561
 562         if (plane == 0) {
 563                 x = dev_priv->sarea_priv->planeA_x;
 564                 y = dev_priv->sarea_priv->planeA_y;
 565         } else {
 566                 x = dev_priv->sarea_priv->planeB_x;
 567                 y = dev_priv->sarea_priv->planeB_y;
 568         }
 569
 570         dspbase += (y * dev_priv->sarea_priv->pitch + x) * dev_priv->cpp;
 571
 572         DRM_DEBUG("plane=%d current_page=%d dspbase=0x%x\n", plane, current_page,
 573                   dspbase);
 574
 575         BEGIN_LP_RING(4);
 576         OUT_RING(sync ? 0 :
 577                  (MI_WAIT_FOR_EVENT | (plane ? MI_WAIT_FOR_PLANE_B_FLIP :
 578                                        MI_WAIT_FOR_PLANE_A_FLIP)));
 579         OUT_RING(CMD_OP_DISPLAYBUFFER_INFO | (sync ? 0 : ASYNC_FLIP) |
 580                  (plane ? DISPLAY_PLANE_B : DISPLAY_PLANE_A));
 581         OUT_RING(dev_priv->sarea_priv->pitch * dev_priv->cpp);
 582         OUT_RING(dspbase);
 583         ADVANCE_LP_RING();
 584
 585         dev_priv->sarea_priv->pf_current_page &= ~(0x3 << shift);
 586         dev_priv->sarea_priv->pf_current_page |= next_page << shift;
 587 }
 588
 589 void i915_dispatch_flip(struct drm_device * dev, int planes, int sync)
 590 {
 591         drm_i915_private_t *dev_priv = dev->dev_private;
 592         int i;
 593
 594         DRM_DEBUG("planes=0x%x pfCurrentPage=%d\n",
 595                   planes, dev_priv->sarea_priv->pf_current_page);
 596
 597         i915_emit_mi_flush(dev, MI_READ_FLUSH | MI_EXE_FLUSH);
 598
 599         for (i = 0; i < 2; i++)
 600                 if (planes & (1 << i))
 601                         i915_do_dispatch_flip(dev, i, sync);
 602
 603         i915_emit_breadcrumb(dev);
 604
 605 }
 606
 607 static int i915_quiescent(struct drm_device * dev)
 608 {
 609         drm_i915_private_t *dev_priv = dev->dev_private;
 610
 611         i915_kernel_lost_context(dev);
 612         return i915_wait_ring(dev, dev_priv->ring.Size - 8, __func__);
 613 }
 614
 615 static int i915_flush_ioctl(struct drm_device *dev, void *data,
 616                             struct drm_file *file_priv)
 617 {
 618         LOCK_TEST_WITH_RETURN(dev, file_priv);
 619
 620         return i915_quiescent(dev);
 621 }
 622
 623 static int i915_batchbuffer(struct drm_device *dev, void *data,
 624                             struct drm_file *file_priv)
 625 {
 626         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 627         drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
 628             dev_priv->sarea_priv;
 629         drm_i915_batchbuffer_t *batch = data;
 630         int ret;
 631
 632         if (!dev_priv->allow_batchbuffer) {
 633                 DRM_ERROR("Batchbuffer ioctl disabled\n");
 634                 return -EINVAL;
 635         }
 636
 637         DRM_DEBUG("i915 batchbuffer, start %x used %d cliprects %d\n",
 638                   batch->start, batch->used, batch->num_cliprects);
 639
 640         LOCK_TEST_WITH_RETURN(dev, file_priv);
 641
 642         if (batch->num_cliprects && DRM_VERIFYAREA_READ(batch->cliprects,
 643                                                        batch->num_cliprects *
 644                                                        sizeof(struct drm_clip_rect)))
 645                 return -EFAULT;
 646
 647         ret = i915_dispatch_batchbuffer(dev, batch);
 648
 649         sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
 650         return ret;
 651 }
 652
 653 static int i915_cmdbuffer(struct drm_device *dev, void *data,
 654                           struct drm_file *file_priv)
 655 {
 656         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 657         drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
 658             dev_priv->sarea_priv;
 659         drm_i915_cmdbuffer_t *cmdbuf = data;
 660         int ret;
 661
 662         DRM_DEBUG("i915 cmdbuffer, buf %p sz %d cliprects %d\n",
 663                   cmdbuf->buf, cmdbuf->sz, cmdbuf->num_cliprects);
 664
 665         LOCK_TEST_WITH_RETURN(dev, file_priv);
 666
 667         if (cmdbuf->num_cliprects &&
 668             DRM_VERIFYAREA_READ(cmdbuf->cliprects,
 669                                 cmdbuf->num_cliprects *
 670                                 sizeof(struct drm_clip_rect))) {
 671                 DRM_ERROR("Fault accessing cliprects\n");
 672                 return -EFAULT;
 673         }
 674
 675         ret = i915_dispatch_cmdbuffer(dev, cmdbuf);
 676         if (ret) {
 677                 DRM_ERROR("i915_dispatch_cmdbuffer failed\n");
 678                 return ret;
 679         }
 680
 681         sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
 682         return 0;
 683 }
 684
 685 static int i915_do_cleanup_pageflip(struct drm_device * dev)
 686 {
 687         drm_i915_private_t *dev_priv = dev->dev_private;
 688         int i, planes, num_pages = dev_priv->sarea_priv->third_handle ? 3 : 2;
 689
 690         DRM_DEBUG("\n");
 691
 692         for (i = 0, planes = 0; i < 2; i++)
 693                 if (dev_priv->sarea_priv->pf_current_page & (0x3 << (2 * i))) {
 694                         dev_priv->sarea_priv->pf_current_page =
 695                                 (dev_priv->sarea_priv->pf_current_page &
 696                                  ~(0x3 << (2 * i))) | ((num_pages - 1) << (2 * i));
 697
 698                         planes |= 1 << i;
 699                 }
 700
 701         if (planes)
 702                 i915_dispatch_flip(dev, planes, 0);
 703
 704         return 0;
 705 }
 706
 707 static int i915_flip_bufs(struct drm_device *dev, void *data,
 708                           struct drm_file *file_priv)
 709 {
 710         drm_i915_flip_t *param = data;
 711
 712         DRM_DEBUG("\n");
 713
 714         LOCK_TEST_WITH_RETURN(dev, file_priv);
 715
 716         /* This is really planes */
 717         if (param->pipes & ~0x3) {
 718                 DRM_ERROR("Invalid planes 0x%x, only <= 0x3 is valid\n",
 719                           param->pipes);
 720                 return -EINVAL;
 721         }
 722
 723         i915_dispatch_flip(dev, param->pipes, 0);
 724
 725         return 0;
 726 }
 727
 728 static int i915_getparam(struct drm_device *dev, void *data,
 729                          struct drm_file *file_priv)
 730 {
 731         drm_i915_private_t *dev_priv = dev->dev_private;
 732         drm_i915_getparam_t *param = data;
 733         int value;
 734
 735         if (!dev_priv) {
 736                 DRM_ERROR("called with no initialization\n");
 737                 return -EINVAL;
 738         }
 739
 740         switch (param->param) {
 741         case I915_PARAM_IRQ_ACTIVE:
 742                 value = dev->irq ? 1 : 0;
 743                 break;
 744         case I915_PARAM_ALLOW_BATCHBUFFER:
 745                 value = dev_priv->allow_batchbuffer ? 1 : 0;
 746                 break;
 747         case I915_PARAM_LAST_DISPATCH:
 748                 value = READ_BREADCRUMB(dev_priv);
 749                 break;
 750         default:
 751                 DRM_ERROR("Unknown parameter %d\n", param->param);
 752                 return -EINVAL;
 753         }
 754
 755         if (DRM_COPY_TO_USER(param->value, &value, sizeof(int))) {
 756                 DRM_ERROR("DRM_COPY_TO_USER failed\n");
 757                 return -EFAULT;
 758         }
 759
 760         return 0;
 761 }
 762
 763 static int i915_setparam(struct drm_device *dev, void *data,
 764                          struct drm_file *file_priv)
 765 {
 766         drm_i915_private_t *dev_priv = dev->dev_private;
 767         drm_i915_setparam_t *param = data;
 768
 769         if (!dev_priv) {
 770                 DRM_ERROR("called with no initialization\n");
 771                 return -EINVAL;
 772         }
 773
 774         switch (param->param) {
 775         case I915_SETPARAM_USE_MI_BATCHBUFFER_START:
 776                 if (!IS_I965G(dev))
 777                         dev_priv->use_mi_batchbuffer_start = param->value;
 778                 break;
 779         case I915_SETPARAM_TEX_LRU_LOG_GRANULARITY:
 780                 dev_priv->tex_lru_log_granularity = param->value;
 781                 break;
 782         case I915_SETPARAM_ALLOW_BATCHBUFFER:
 783                 dev_priv->allow_batchbuffer = param->value;
 784                 break;
 785         default:
 786                 DRM_ERROR("unknown parameter %d\n", param->param);
 787                 return -EINVAL;
 788         }
 789
 790         return 0;
 791 }
 792
 793 static int i915_set_status_page(struct drm_device *dev, void *data,
 794                                 struct drm_file *file_priv)
 795 {
 796         drm_i915_private_t *dev_priv = dev->dev_private;
 797         drm_i915_hws_addr_t *hws = data;
 798
 799         if (!I915_NEED_GFX_HWS(dev))
 800                 return -EINVAL;
 801
 802         if (!dev_priv) {
 803                 DRM_ERROR("called with no initialization\n");
 804                 return -EINVAL;
 805         }
 806
 807         printk(KERN_DEBUG "set status page addr 0x%08x\n", (u32)hws->addr);
 808
 809         dev_priv->status_gfx_addr = hws->addr & (0x1ffff<<12);
 810
 811         dev_priv->hws_map.offset = dev->agp->base + hws->addr;
 812         dev_priv->hws_map.size = 4*1024;
 813         dev_priv->hws_map.type = 0;
 814         dev_priv->hws_map.flags = 0;
 815         dev_priv->hws_map.mtrr = 0;
 816
 817         drm_core_ioremap(&dev_priv->hws_map, dev);
 818         if (dev_priv->hws_map.handle == NULL) {
 819                 i915_dma_cleanup(dev);
 820                 dev_priv->status_gfx_addr = 0;
 821                 DRM_ERROR("can not ioremap virtual address for"
 822                                 " G33 hw status page\n");
 823                 return -ENOMEM;
 824         }
 825         dev_priv->hw_status_page = dev_priv->hws_map.handle;
 826
 827         memset(dev_priv->hw_status_page, 0, PAGE_SIZE);
 828         I915_WRITE(0x02080, dev_priv->status_gfx_addr);
 829         DRM_DEBUG("load hws 0x2080 with gfx mem 0x%x\n",
 830                         dev_priv->status_gfx_addr);
 831         DRM_DEBUG("load hws at %p\n", dev_priv->hw_status_page);
 832         return 0;
 833 }
 834
 835 int i915_driver_load(struct drm_device *dev, unsigned long flags)
 836 {
 837         struct drm_i915_private *dev_priv = dev->dev_private;
 838         unsigned long base, size;
 839         int ret = 0, mmio_bar = IS_I9XX(dev) ? 0 : 1;
 840
 841         /* i915 has 4 more counters */
 842         dev->counters += 4;
 843         dev->types[6] = _DRM_STAT_IRQ;
 844         dev->types[7] = _DRM_STAT_PRIMARY;
 845         dev->types[8] = _DRM_STAT_SECONDARY;
 846         dev->types[9] = _DRM_STAT_DMA;
 847
 848         dev_priv = drm_alloc(sizeof(drm_i915_private_t), DRM_MEM_DRIVER);
 849         if (dev_priv == NULL)
 850                 return -ENOMEM;
 851
 852         memset(dev_priv, 0, sizeof(drm_i915_private_t));
 853
 854         dev->dev_private = (void *)dev_priv;
 855
 856         /* Add register map (needed for suspend/resume) */
 857         base = drm_get_resource_start(dev, mmio_bar);
 858         size = drm_get_resource_len(dev, mmio_bar);
 859
 860         ret = drm_addmap(dev, base, size, _DRM_REGISTERS,
 861                          _DRM_KERNEL | _DRM_DRIVER,
 862                          &dev_priv->mmio_map);
 863         return ret;
 864 }
 865
 866 int i915_driver_unload(struct drm_device *dev)
 867 {
 868         struct drm_i915_private *dev_priv = dev->dev_private;
 869
 870         if (dev_priv->mmio_map)
 871                 drm_rmmap(dev, dev_priv->mmio_map);
 872
 873         drm_free(dev->dev_private, sizeof(drm_i915_private_t),
 874                  DRM_MEM_DRIVER);
 875
 876         return 0;
 877 }
 878
 879 void i915_driver_lastclose(struct drm_device * dev)
 880 {
 881         drm_i915_private_t *dev_priv = dev->dev_private;
 882
 883         if (!dev_priv)
 884                 return;
 885
 886         if (drm_getsarea(dev) && dev_priv->sarea_priv)
 887                 i915_do_cleanup_pageflip(dev);
 888         if (dev_priv->agp_heap)
 889                 i915_mem_takedown(&(dev_priv->agp_heap));
 890
 891         i915_dma_cleanup(dev);
 892 }
 893
 894 void i915_driver_preclose(struct drm_device * dev, struct drm_file *file_priv)
 895 {
 896         drm_i915_private_t *dev_priv = dev->dev_private;
 897         i915_mem_release(dev, file_priv, dev_priv->agp_heap);
 898 }
 899
 900 struct drm_ioctl_desc i915_ioctls[] = {
 901         DRM_IOCTL_DEF(DRM_I915_INIT, i915_dma_init, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 902         DRM_IOCTL_DEF(DRM_I915_FLUSH, i915_flush_ioctl, DRM_AUTH),
 903         DRM_IOCTL_DEF(DRM_I915_FLIP, i915_flip_bufs, DRM_AUTH),
 904         DRM_IOCTL_DEF(DRM_I915_BATCHBUFFER, i915_batchbuffer, DRM_AUTH),
 905         DRM_IOCTL_DEF(DRM_I915_IRQ_EMIT, i915_irq_emit, DRM_AUTH),
 906         DRM_IOCTL_DEF(DRM_I915_IRQ_WAIT, i915_irq_wait, DRM_AUTH),
 907         DRM_IOCTL_DEF(DRM_I915_GETPARAM, i915_getparam, DRM_AUTH),
 908         DRM_IOCTL_DEF(DRM_I915_SETPARAM, i915_setparam, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 909         DRM_IOCTL_DEF(DRM_I915_ALLOC, i915_mem_alloc, DRM_AUTH),
 910         DRM_IOCTL_DEF(DRM_I915_FREE, i915_mem_free, DRM_AUTH),
 911         DRM_IOCTL_DEF(DRM_I915_INIT_HEAP, i915_mem_init_heap, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 912         DRM_IOCTL_DEF(DRM_I915_CMDBUFFER, i915_cmdbuffer, DRM_AUTH),
 913         DRM_IOCTL_DEF(DRM_I915_DESTROY_HEAP,  i915_mem_destroy_heap, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY ),
 914         DRM_IOCTL_DEF(DRM_I915_SET_VBLANK_PIPE,  i915_vblank_pipe_set, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY ),
 915         DRM_IOCTL_DEF(DRM_I915_GET_VBLANK_PIPE,  i915_vblank_pipe_get, DRM_AUTH ),
 916         DRM_IOCTL_DEF(DRM_I915_VBLANK_SWAP, i915_vblank_swap, DRM_AUTH),
 917         DRM_IOCTL_DEF(DRM_I915_HWS_ADDR, i915_set_status_page, DRM_AUTH),
 918 };
 919
 920 int i915_max_ioctl = DRM_ARRAY_SIZE(i915_ioctls);
 921
 922 /**
 923  * Determine if the device really is AGP or not.
 924  *
 925  * All Intel graphics chipsets are treated as AGP, even if they are really
 926  * PCI-e.
 927  *
 928  * \param dev   The device to be tested.
 929  *
 930  * \returns
 931  * A value of 1 is always retured to indictate every i9x5 is AGP.
 932  */
 933 int i915_driver_device_is_agp(struct drm_device * dev)
 934 {
 935         return 1;
 936 }