drivers/char/drm/i810_dma.c

   1 /* i810_dma.c -- DMA support for the i810 -*- linux-c -*-
   2  * Created: Mon Dec 13 01:50:01 1999 by jhartmann@precisioninsight.com
   3  *
   4  * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
   5  * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
   6  * All Rights Reserved.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice (including the next
  16  * paragraph) shall be included in all copies or substantial portions of the
  17  * Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  20  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  22  * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  23  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  24  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  25  * DEALINGS IN THE SOFTWARE.
  26  *
  27  * Authors: Rickard E. (Rik) Faith <faith@valinux.com>
  28  *          Jeff Hartmann <jhartmann@valinux.com>
  29  *          Keith Whitwell <keith@tungstengraphics.com>
  30  *
  31  */
  32
  33 #include "drmP.h"
  34 #include "drm.h"
  35 #include "i810_drm.h"
  36 #include "i810_drv.h"
  37 #include <linux/interrupt.h>    /* For task queue support */
  38 #include <linux/delay.h>
  39 #include <linux/pagemap.h>
  40
  41 #define I810_BUF_FREE           2
  42 #define I810_BUF_CLIENT         1
  43 #define I810_BUF_HARDWARE       0
  44
  45 #define I810_BUF_UNMAPPED 0
  46 #define I810_BUF_MAPPED   1
  47
  48 static drm_buf_t *i810_freelist_get(drm_device_t *dev)
  49 {
  50         drm_device_dma_t *dma = dev->dma;
  51         int              i;
  52         int              used;
  53
  54         /* Linear search might not be the best solution */
  55
  56         for (i = 0; i < dma->buf_count; i++) {
  57                 drm_buf_t *buf = dma->buflist[ i ];
  58                 drm_i810_buf_priv_t *buf_priv = buf->dev_private;
  59                 /* In use is already a pointer */
  60                 used = cmpxchg(buf_priv->in_use, I810_BUF_FREE,
  61                                I810_BUF_CLIENT);
  62                 if (used == I810_BUF_FREE) {
  63                         return buf;
  64                 }
  65         }
  66         return NULL;
  67 }
  68
  69 /* This should only be called if the buffer is not sent to the hardware
  70  * yet, the hardware updates in use for us once its on the ring buffer.
  71  */
  72
  73 static int i810_freelist_put(drm_device_t *dev, drm_buf_t *buf)
  74 {
  75         drm_i810_buf_priv_t *buf_priv = buf->dev_private;
  76         int used;
  77
  78         /* In use is already a pointer */
  79         used = cmpxchg(buf_priv->in_use, I810_BUF_CLIENT, I810_BUF_FREE);
  80         if (used != I810_BUF_CLIENT) {
  81                 DRM_ERROR("Freeing buffer thats not in use : %d\n", buf->idx);
  82                 return -EINVAL;
  83         }
  84
  85         return 0;
  86 }
  87
  88 static int i810_mmap_buffers(struct file *filp, struct vm_area_struct *vma)
  89 {
  90         drm_file_t          *priv         = filp->private_data;
  91         drm_device_t        *dev;
  92         drm_i810_private_t  *dev_priv;
  93         drm_buf_t           *buf;
  94         drm_i810_buf_priv_t *buf_priv;
  95
  96         lock_kernel();
  97         dev      = priv->head->dev;
  98         dev_priv = dev->dev_private;
  99         buf      = dev_priv->mmap_buffer;
 100         buf_priv = buf->dev_private;
 101
 102         vma->vm_flags |= (VM_IO | VM_DONTCOPY);
 103         vma->vm_file = filp;
 104
 105         buf_priv->currently_mapped = I810_BUF_MAPPED;
 106         unlock_kernel();
 107
 108         if (io_remap_pfn_range(vma, vma->vm_start,
 109                              VM_OFFSET(vma) >> PAGE_SHIFT,
 110                              vma->vm_end - vma->vm_start,
 111                              vma->vm_page_prot)) return -EAGAIN;
 112         return 0;
 113 }
 114
 115 static struct file_operations i810_buffer_fops = {
 116         .open    = drm_open,
 117         .flush   = drm_flush,
 118         .release = drm_release,
 119         .ioctl   = drm_ioctl,
 120         .mmap    = i810_mmap_buffers,
 121         .fasync  = drm_fasync,
 122 };
 123
 124 static int i810_map_buffer(drm_buf_t *buf, struct file *filp)
 125 {
 126         drm_file_t        *priv   = filp->private_data;
 127         drm_device_t      *dev    = priv->head->dev;
 128         drm_i810_buf_priv_t *buf_priv = buf->dev_private;
 129         drm_i810_private_t *dev_priv = dev->dev_private;
 130         struct file_operations *old_fops;
 131         int retcode = 0;
 132
 133         if (buf_priv->currently_mapped == I810_BUF_MAPPED)
 134                 return -EINVAL;
 135
 136         down_write( &current->mm->mmap_sem );
 137         old_fops = filp->f_op;
 138         filp->f_op = &i810_buffer_fops;
 139         dev_priv->mmap_buffer = buf;
 140         buf_priv->virtual = (void *)do_mmap(filp, 0, buf->total,
 141                                             PROT_READ|PROT_WRITE,
 142                                             MAP_SHARED,
 143                                             buf->bus_address);
 144         dev_priv->mmap_buffer = NULL;
 145         filp->f_op = old_fops;
 146         if ((unsigned long)buf_priv->virtual > -1024UL) {
 147                 /* Real error */
 148                 DRM_ERROR("mmap error\n");
 149                 retcode = (signed int)buf_priv->virtual;
 150                 buf_priv->virtual = NULL;
 151         }
 152         up_write( &current->mm->mmap_sem );
 153
 154         return retcode;
 155 }
 156
 157 static int i810_unmap_buffer(drm_buf_t *buf)
 158 {
 159         drm_i810_buf_priv_t *buf_priv = buf->dev_private;
 160         int retcode = 0;
 161
 162         if (buf_priv->currently_mapped != I810_BUF_MAPPED)
 163                 return -EINVAL;
 164
 165         down_write(&current->mm->mmap_sem);
 166         retcode = do_munmap(current->mm,
 167                             (unsigned long)buf_priv->virtual,
 168                             (size_t) buf->total);
 169         up_write(&current->mm->mmap_sem);
 170
 171         buf_priv->currently_mapped = I810_BUF_UNMAPPED;
 172         buf_priv->virtual = NULL;
 173
 174         return retcode;
 175 }
 176
 177 static int i810_dma_get_buffer(drm_device_t *dev, drm_i810_dma_t *d,
 178                                struct file *filp)
 179 {
 180         drm_buf_t         *buf;
 181         drm_i810_buf_priv_t *buf_priv;
 182         int retcode = 0;
 183
 184         buf = i810_freelist_get(dev);
 185         if (!buf) {
 186                 retcode = -ENOMEM;
 187                 DRM_DEBUG("retcode=%d\n", retcode);
 188                 return retcode;
 189         }
 190
 191         retcode = i810_map_buffer(buf, filp);
 192         if (retcode) {
 193                 i810_freelist_put(dev, buf);
 194                 DRM_ERROR("mapbuf failed, retcode %d\n", retcode);
 195                 return retcode;
 196         }
 197         buf->filp = filp;
 198         buf_priv = buf->dev_private;
 199         d->granted = 1;
 200         d->request_idx = buf->idx;
 201         d->request_size = buf->total;
 202         d->virtual = buf_priv->virtual;
 203
 204         return retcode;
 205 }
 206
 207 static int i810_dma_cleanup(drm_device_t *dev)
 208 {
 209         drm_device_dma_t *dma = dev->dma;
 210
 211         /* Make sure interrupts are disabled here because the uninstall ioctl
 212          * may not have been called from userspace and after dev_private
 213          * is freed, it's too late.
 214          */
 215         if (drm_core_check_feature(dev, DRIVER_HAVE_IRQ) && dev->irq_enabled)
 216                 drm_irq_uninstall(dev);
 217
 218         if (dev->dev_private) {
 219                 int i;
 220                 drm_i810_private_t *dev_priv =
 221                         (drm_i810_private_t *) dev->dev_private;
 222
 223                 if (dev_priv->ring.virtual_start) {
 224                         drm_ioremapfree((void *) dev_priv->ring.virtual_start,
 225                                          dev_priv->ring.Size, dev);
 226                 }
 227                 if (dev_priv->hw_status_page) {
 228                         pci_free_consistent(dev->pdev, PAGE_SIZE,
 229                                             dev_priv->hw_status_page,
 230                                             dev_priv->dma_status_page);
 231                         /* Need to rewrite hardware status page */
 232                         I810_WRITE(0x02080, 0x1ffff000);
 233                 }
 234                 drm_free(dev->dev_private, sizeof(drm_i810_private_t),
 235                          DRM_MEM_DRIVER);
 236                 dev->dev_private = NULL;
 237
 238                 for (i = 0; i < dma->buf_count; i++) {
 239                         drm_buf_t *buf = dma->buflist[ i ];
 240                         drm_i810_buf_priv_t *buf_priv = buf->dev_private;
 241                         if ( buf_priv->kernel_virtual && buf->total )
 242                                 drm_ioremapfree(buf_priv->kernel_virtual, buf->total, dev);
 243                 }
 244         }
 245         return 0;
 246 }
 247
 248 static int i810_wait_ring(drm_device_t *dev, int n)
 249 {
 250         drm_i810_private_t *dev_priv = dev->dev_private;
 251         drm_i810_ring_buffer_t *ring = &(dev_priv->ring);
 252         int iters = 0;
 253         unsigned long end;
 254         unsigned int last_head = I810_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
 255
 256         end = jiffies + (HZ*3);
 257         while (ring->space < n) {
 258                 ring->head = I810_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
 259                 ring->space = ring->head - (ring->tail+8);
 260                 if (ring->space < 0) ring->space += ring->Size;
 261
 262                 if (ring->head != last_head) {
 263                         end = jiffies + (HZ*3);
 264                         last_head = ring->head;
 265                 }
 266
 267                 iters++;
 268                 if (time_before(end, jiffies)) {
 269                         DRM_ERROR("space: %d wanted %d\n", ring->space, n);
 270                         DRM_ERROR("lockup\n");
 271                         goto out_wait_ring;
 272                 }
 273                 udelay(1);
 274         }
 275
 276 out_wait_ring:
 277         return iters;
 278 }
 279
 280 static void i810_kernel_lost_context(drm_device_t *dev)
 281 {
 282         drm_i810_private_t *dev_priv = dev->dev_private;
 283         drm_i810_ring_buffer_t *ring = &(dev_priv->ring);
 284
 285         ring->head = I810_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
 286         ring->tail = I810_READ(LP_RING + RING_TAIL);
 287         ring->space = ring->head - (ring->tail+8);
 288         if (ring->space < 0) ring->space += ring->Size;
 289 }
 290
 291 static int i810_freelist_init(drm_device_t *dev, drm_i810_private_t *dev_priv)
 292 {
 293         drm_device_dma_t *dma = dev->dma;
 294         int my_idx = 24;
 295         u32 *hw_status = (u32 *)(dev_priv->hw_status_page + my_idx);
 296         int i;
 297
 298         if (dma->buf_count > 1019) {
 299                 /* Not enough space in the status page for the freelist */
 300                 return -EINVAL;
 301         }
 302
 303         for (i = 0; i < dma->buf_count; i++) {
 304                 drm_buf_t *buf = dma->buflist[ i ];
 305                 drm_i810_buf_priv_t *buf_priv = buf->dev_private;
 306
 307                 buf_priv->in_use = hw_status++;
 308                 buf_priv->my_use_idx = my_idx;
 309                 my_idx += 4;
 310
 311                 *buf_priv->in_use = I810_BUF_FREE;
 312
 313                 buf_priv->kernel_virtual = drm_ioremap(buf->bus_address,
 314                                                         buf->total, dev);
 315         }
 316         return 0;
 317 }
 318
 319 static int i810_dma_initialize(drm_device_t *dev,
 320                                drm_i810_private_t *dev_priv,
 321                                drm_i810_init_t *init)
 322 {
 323         struct list_head *list;
 324
 325         memset(dev_priv, 0, sizeof(drm_i810_private_t));
 326
 327         list_for_each(list, &dev->maplist->head) {
 328                 drm_map_list_t *r_list = list_entry(list, drm_map_list_t, head);
 329                 if (r_list->map &&
 330                     r_list->map->type == _DRM_SHM &&
 331                     r_list->map->flags & _DRM_CONTAINS_LOCK ) {
 332                         dev_priv->sarea_map = r_list->map;
 333                         break;
 334                 }
 335         }
 336         if (!dev_priv->sarea_map) {
 337                 dev->dev_private = (void *)dev_priv;
 338                 i810_dma_cleanup(dev);
 339                 DRM_ERROR("can not find sarea!\n");
 340                 return -EINVAL;
 341         }
 342         dev_priv->mmio_map = drm_core_findmap(dev, init->mmio_offset);
 343         if (!dev_priv->mmio_map) {
 344                 dev->dev_private = (void *)dev_priv;
 345                 i810_dma_cleanup(dev);
 346                 DRM_ERROR("can not find mmio map!\n");
 347                 return -EINVAL;
 348         }
 349         dev->agp_buffer_token = init->buffers_offset;
 350         dev->agp_buffer_map = drm_core_findmap(dev, init->buffers_offset);
 351         if (!dev->agp_buffer_map) {
 352                 dev->dev_private = (void *)dev_priv;
 353                 i810_dma_cleanup(dev);
 354                 DRM_ERROR("can not find dma buffer map!\n");
 355                 return -EINVAL;
 356         }
 357
 358         dev_priv->sarea_priv = (drm_i810_sarea_t *)
 359                 ((u8 *)dev_priv->sarea_map->handle +
 360                  init->sarea_priv_offset);
 361
 362         dev_priv->ring.Start = init->ring_start;
 363         dev_priv->ring.End = init->ring_end;
 364         dev_priv->ring.Size = init->ring_size;
 365
 366         dev_priv->ring.virtual_start = drm_ioremap(dev->agp->base +
 367                                                     init->ring_start,
 368                                                     init->ring_size, dev);
 369
 370         if (dev_priv->ring.virtual_start == NULL) {
 371                 dev->dev_private = (void *) dev_priv;
 372                 i810_dma_cleanup(dev);
 373                 DRM_ERROR("can not ioremap virtual address for"
 374                           " ring buffer\n");
 375                 return -ENOMEM;
 376         }
 377
 378         dev_priv->ring.tail_mask = dev_priv->ring.Size - 1;
 379
 380         dev_priv->w = init->w;
 381         dev_priv->h = init->h;
 382         dev_priv->pitch = init->pitch;
 383         dev_priv->back_offset = init->back_offset;
 384         dev_priv->depth_offset = init->depth_offset;
 385         dev_priv->front_offset = init->front_offset;
 386
 387         dev_priv->overlay_offset = init->overlay_offset;
 388         dev_priv->overlay_physical = init->overlay_physical;
 389
 390         dev_priv->front_di1 = init->front_offset | init->pitch_bits;
 391         dev_priv->back_di1 = init->back_offset | init->pitch_bits;
 392         dev_priv->zi1 = init->depth_offset | init->pitch_bits;
 393
 394         /* Program Hardware Status Page */
 395         dev_priv->hw_status_page =
 396                 pci_alloc_consistent(dev->pdev, PAGE_SIZE,
 397                                                 &dev_priv->dma_status_page);
 398         if (!dev_priv->hw_status_page) {
 399                 dev->dev_private = (void *)dev_priv;
 400                 i810_dma_cleanup(dev);
 401                 DRM_ERROR("Can not allocate hardware status page\n");
 402                 return -ENOMEM;
 403         }
 404         memset(dev_priv->hw_status_page, 0, PAGE_SIZE);
 405         DRM_DEBUG("hw status page @ %p\n", dev_priv->hw_status_page);
 406
 407         I810_WRITE(0x02080, dev_priv->dma_status_page);
 408         DRM_DEBUG("Enabled hardware status page\n");
 409
 410         /* Now we need to init our freelist */
 411         if (i810_freelist_init(dev, dev_priv) != 0) {
 412                 dev->dev_private = (void *)dev_priv;
 413                 i810_dma_cleanup(dev);
 414                 DRM_ERROR("Not enough space in the status page for"
 415                           " the freelist\n");
 416                 return -ENOMEM;
 417         }
 418         dev->dev_private = (void *)dev_priv;
 419
 420         return 0;
 421 }
 422
 423 /* i810 DRM version 1.1 used a smaller init structure with different
 424  * ordering of values than is currently used (drm >= 1.2). There is
 425  * no defined way to detect the XFree version to correct this problem,
 426  * however by checking using this procedure we can detect the correct
 427  * thing to do.
 428  *
 429  * #1 Read the Smaller init structure from user-space
 430  * #2 Verify the overlay_physical is a valid physical address, or NULL
 431  *    If it isn't then we have a v1.1 client. Fix up params.
 432  *    If it is, then we have a 1.2 client... get the rest of the data.
 433  */
 434 static int i810_dma_init_compat(drm_i810_init_t *init, unsigned long arg)
 435 {
 436
 437         /* Get v1.1 init data */
 438         if (copy_from_user(init, (drm_i810_pre12_init_t __user *)arg,
 439                           sizeof(drm_i810_pre12_init_t))) {
 440                 return -EFAULT;
 441         }
 442
 443         if ((!init->overlay_physical) || (init->overlay_physical > 4096)) {
 444
 445                 /* This is a v1.2 client, just get the v1.2 init data */
 446                 DRM_INFO("Using POST v1.2 init.\n");
 447                 if (copy_from_user(init, (drm_i810_init_t __user *)arg,
 448                                    sizeof(drm_i810_init_t))) {
 449                         return -EFAULT;
 450                 }
 451         } else {
 452
 453                 /* This is a v1.1 client, fix the params */
 454                 DRM_INFO("Using PRE v1.2 init.\n");
 455                 init->pitch_bits = init->h;
 456                 init->pitch = init->w;
 457                 init->h = init->overlay_physical;
 458                 init->w = init->overlay_offset;
 459                 init->overlay_physical = 0;
 460                 init->overlay_offset = 0;
 461         }
 462
 463         return 0;
 464 }
 465
 466 static int i810_dma_init(struct inode *inode, struct file *filp,
 467                   unsigned int cmd, unsigned long arg)
 468 {
 469         drm_file_t *priv = filp->private_data;
 470         drm_device_t *dev = priv->head->dev;
 471         drm_i810_private_t *dev_priv;
 472         drm_i810_init_t init;
 473         int retcode = 0;
 474
 475         /* Get only the init func */
 476         if (copy_from_user(&init, (void __user *)arg, sizeof(drm_i810_init_func_t)))
 477                 return -EFAULT;
 478
 479         switch(init.func) {
 480                 case I810_INIT_DMA:
 481                         /* This case is for backward compatibility. It
 482                          * handles XFree 4.1.0 and 4.2.0, and has to
 483                          * do some parameter checking as described below.
 484                          * It will someday go away.
 485                          */
 486                         retcode = i810_dma_init_compat(&init, arg);
 487                         if (retcode)
 488                                 return retcode;
 489
 490                         dev_priv = drm_alloc(sizeof(drm_i810_private_t),
 491                                              DRM_MEM_DRIVER);
 492                         if (dev_priv == NULL)
 493                                 return -ENOMEM;
 494                         retcode = i810_dma_initialize(dev, dev_priv, &init);
 495                         break;
 496
 497                 default:
 498                 case I810_INIT_DMA_1_4:
 499                         DRM_INFO("Using v1.4 init.\n");
 500                         if (copy_from_user(&init, (drm_i810_init_t __user *)arg,
 501                                           sizeof(drm_i810_init_t))) {
 502                                 return -EFAULT;
 503                         }
 504                         dev_priv = drm_alloc(sizeof(drm_i810_private_t),
 505                                              DRM_MEM_DRIVER);
 506                         if (dev_priv == NULL)
 507                                 return -ENOMEM;
 508                         retcode = i810_dma_initialize(dev, dev_priv, &init);
 509                         break;
 510
 511                 case I810_CLEANUP_DMA:
 512                         DRM_INFO("DMA Cleanup\n");
 513                         retcode = i810_dma_cleanup(dev);
 514                         break;
 515         }
 516
 517         return retcode;
 518 }
 519
 520
 521
 522 /* Most efficient way to verify state for the i810 is as it is
 523  * emitted.  Non-conformant state is silently dropped.
 524  *
 525  * Use 'volatile' & local var tmp to force the emitted values to be
 526  * identical to the verified ones.
 527  */
 528 static void i810EmitContextVerified( drm_device_t *dev,
 529                                      volatile unsigned int *code )
 530 {
 531         drm_i810_private_t *dev_priv = dev->dev_private;
 532         int i, j = 0;
 533         unsigned int tmp;
 534         RING_LOCALS;
 535
 536         BEGIN_LP_RING( I810_CTX_SETUP_SIZE );
 537
 538         OUT_RING( GFX_OP_COLOR_FACTOR );
 539         OUT_RING( code[I810_CTXREG_CF1] );
 540
 541         OUT_RING( GFX_OP_STIPPLE );
 542         OUT_RING( code[I810_CTXREG_ST1] );
 543
 544         for ( i = 4 ; i < I810_CTX_SETUP_SIZE ; i++ ) {
 545                 tmp = code[i];
 546
 547                 if ((tmp & (7<<29)) == (3<<29) &&
 548                     (tmp & (0x1f<<24)) < (0x1d<<24))
 549                 {
 550                         OUT_RING( tmp );
 551                         j++;
 552                 }
 553                 else printk("constext state dropped!!!\n");
 554         }
 555
 556         if (j & 1)
 557                 OUT_RING( 0 );
 558
 559         ADVANCE_LP_RING();
 560 }
 561
 562 static void i810EmitTexVerified( drm_device_t *dev,
 563                                  volatile unsigned int *code )
 564 {
 565         drm_i810_private_t *dev_priv = dev->dev_private;
 566         int i, j = 0;
 567         unsigned int tmp;
 568         RING_LOCALS;
 569
 570         BEGIN_LP_RING( I810_TEX_SETUP_SIZE );
 571
 572         OUT_RING( GFX_OP_MAP_INFO );
 573         OUT_RING( code[I810_TEXREG_MI1] );
 574         OUT_RING( code[I810_TEXREG_MI2] );
 575         OUT_RING( code[I810_TEXREG_MI3] );
 576
 577         for ( i = 4 ; i < I810_TEX_SETUP_SIZE ; i++ ) {
 578                 tmp = code[i];
 579
 580                 if ((tmp & (7<<29)) == (3<<29) &&
 581                     (tmp & (0x1f<<24)) < (0x1d<<24))
 582                 {
 583                         OUT_RING( tmp );
 584                         j++;
 585                 }
 586                 else printk("texture state dropped!!!\n");
 587         }
 588
 589         if (j & 1)
 590                 OUT_RING( 0 );
 591
 592         ADVANCE_LP_RING();
 593 }
 594
 595
 596 /* Need to do some additional checking when setting the dest buffer.
 597  */
 598 static void i810EmitDestVerified( drm_device_t *dev,
 599                                   volatile unsigned int *code )
 600 {
 601         drm_i810_private_t *dev_priv = dev->dev_private;
 602         unsigned int tmp;
 603         RING_LOCALS;
 604
 605         BEGIN_LP_RING( I810_DEST_SETUP_SIZE + 2 );
 606
 607         tmp = code[I810_DESTREG_DI1];
 608         if (tmp == dev_priv->front_di1 || tmp == dev_priv->back_di1) {
 609                 OUT_RING( CMD_OP_DESTBUFFER_INFO );
 610                 OUT_RING( tmp );
 611         } else
 612            DRM_DEBUG("bad di1 %x (allow %x or %x)\n",
 613                      tmp, dev_priv->front_di1, dev_priv->back_di1);
 614
 615         /* invarient:
 616          */
 617         OUT_RING( CMD_OP_Z_BUFFER_INFO );
 618         OUT_RING( dev_priv->zi1 );
 619
 620         OUT_RING( GFX_OP_DESTBUFFER_VARS );
 621         OUT_RING( code[I810_DESTREG_DV1] );
 622
 623         OUT_RING( GFX_OP_DRAWRECT_INFO );
 624         OUT_RING( code[I810_DESTREG_DR1] );
 625         OUT_RING( code[I810_DESTREG_DR2] );
 626         OUT_RING( code[I810_DESTREG_DR3] );
 627         OUT_RING( code[I810_DESTREG_DR4] );
 628         OUT_RING( 0 );
 629
 630         ADVANCE_LP_RING();
 631 }
 632
 633
 634
 635 static void i810EmitState( drm_device_t *dev )
 636 {
 637         drm_i810_private_t *dev_priv = dev->dev_private;
 638         drm_i810_sarea_t *sarea_priv = dev_priv->sarea_priv;
 639         unsigned int dirty = sarea_priv->dirty;
 640
 641         DRM_DEBUG("%s %x\n", __FUNCTION__, dirty);
 642
 643         if (dirty & I810_UPLOAD_BUFFERS) {
 644                 i810EmitDestVerified( dev, sarea_priv->BufferState );
 645                 sarea_priv->dirty &= ~I810_UPLOAD_BUFFERS;
 646         }
 647
 648         if (dirty & I810_UPLOAD_CTX) {
 649                 i810EmitContextVerified( dev, sarea_priv->ContextState );
 650                 sarea_priv->dirty &= ~I810_UPLOAD_CTX;
 651         }
 652
 653         if (dirty & I810_UPLOAD_TEX0) {
 654                 i810EmitTexVerified( dev, sarea_priv->TexState[0] );
 655                 sarea_priv->dirty &= ~I810_UPLOAD_TEX0;
 656         }
 657
 658         if (dirty & I810_UPLOAD_TEX1) {
 659                 i810EmitTexVerified( dev, sarea_priv->TexState[1] );
 660                 sarea_priv->dirty &= ~I810_UPLOAD_TEX1;
 661         }
 662 }
 663
 664
 665
 666 /* need to verify
 667  */
 668 static void i810_dma_dispatch_clear( drm_device_t *dev, int flags,
 669                                      unsigned int clear_color,
 670                                      unsigned int clear_zval )
 671 {
 672         drm_i810_private_t *dev_priv = dev->dev_private;
 673         drm_i810_sarea_t *sarea_priv = dev_priv->sarea_priv;
 674         int nbox = sarea_priv->nbox;
 675         drm_clip_rect_t *pbox = sarea_priv->boxes;
 676         int pitch = dev_priv->pitch;
 677         int cpp = 2;
 678         int i;
 679         RING_LOCALS;
 680
 681         if ( dev_priv->current_page == 1 ) {
 682                 unsigned int tmp = flags;
 683
 684                 flags &= ~(I810_FRONT | I810_BACK);
 685                 if (tmp & I810_FRONT) flags |= I810_BACK;
 686                 if (tmp & I810_BACK) flags |= I810_FRONT;
 687         }
 688
 689         i810_kernel_lost_context(dev);
 690
 691         if (nbox > I810_NR_SAREA_CLIPRECTS)
 692                 nbox = I810_NR_SAREA_CLIPRECTS;
 693
 694         for (i = 0 ; i < nbox ; i++, pbox++) {
 695                 unsigned int x = pbox->x1;
 696                 unsigned int y = pbox->y1;
 697                 unsigned int width = (pbox->x2 - x) * cpp;
 698                 unsigned int height = pbox->y2 - y;
 699                 unsigned int start = y * pitch + x * cpp;
 700
 701                 if (pbox->x1 > pbox->x2 ||
 702                     pbox->y1 > pbox->y2 ||
 703                     pbox->x2 > dev_priv->w ||
 704                     pbox->y2 > dev_priv->h)
 705                         continue;
 706
 707                 if ( flags & I810_FRONT ) {
 708                         BEGIN_LP_RING( 6 );
 709                         OUT_RING( BR00_BITBLT_CLIENT |
 710                                   BR00_OP_COLOR_BLT | 0x3 );
 711                         OUT_RING( BR13_SOLID_PATTERN | (0xF0 << 16) | pitch );
 712                         OUT_RING( (height << 16) | width );
 713                         OUT_RING( start );
 714                         OUT_RING( clear_color );
 715                         OUT_RING( 0 );
 716                         ADVANCE_LP_RING();
 717                 }
 718
 719                 if ( flags & I810_BACK ) {
 720                         BEGIN_LP_RING( 6 );
 721                         OUT_RING( BR00_BITBLT_CLIENT |
 722                                   BR00_OP_COLOR_BLT | 0x3 );
 723                         OUT_RING( BR13_SOLID_PATTERN | (0xF0 << 16) | pitch );
 724                         OUT_RING( (height << 16) | width );
 725                         OUT_RING( dev_priv->back_offset + start );
 726                         OUT_RING( clear_color );
 727                         OUT_RING( 0 );
 728                         ADVANCE_LP_RING();
 729                 }
 730
 731                 if ( flags & I810_DEPTH ) {
 732                         BEGIN_LP_RING( 6 );
 733                         OUT_RING( BR00_BITBLT_CLIENT |
 734                                   BR00_OP_COLOR_BLT | 0x3 );
 735                         OUT_RING( BR13_SOLID_PATTERN | (0xF0 << 16) | pitch );
 736                         OUT_RING( (height << 16) | width );
 737                         OUT_RING( dev_priv->depth_offset + start );
 738                         OUT_RING( clear_zval );
 739                         OUT_RING( 0 );
 740                         ADVANCE_LP_RING();
 741                 }
 742         }
 743 }
 744
 745 static void i810_dma_dispatch_swap( drm_device_t *dev )
 746 {
 747         drm_i810_private_t *dev_priv = dev->dev_private;
 748         drm_i810_sarea_t *sarea_priv = dev_priv->sarea_priv;
 749         int nbox = sarea_priv->nbox;
 750         drm_clip_rect_t *pbox = sarea_priv->boxes;
 751         int pitch = dev_priv->pitch;
 752         int cpp = 2;
 753         int i;
 754         RING_LOCALS;
 755
 756         DRM_DEBUG("swapbuffers\n");
 757
 758         i810_kernel_lost_context(dev);
 759
 760         if (nbox > I810_NR_SAREA_CLIPRECTS)
 761                 nbox = I810_NR_SAREA_CLIPRECTS;
 762
 763         for (i = 0 ; i < nbox; i++, pbox++)
 764         {
 765                 unsigned int w = pbox->x2 - pbox->x1;
 766                 unsigned int h = pbox->y2 - pbox->y1;
 767                 unsigned int dst = pbox->x1*cpp + pbox->y1*pitch;
 768                 unsigned int start = dst;
 769
 770                 if (pbox->x1 > pbox->x2 ||
 771                     pbox->y1 > pbox->y2 ||
 772                     pbox->x2 > dev_priv->w ||
 773                     pbox->y2 > dev_priv->h)
 774                         continue;
 775
 776                 BEGIN_LP_RING( 6 );
 777                 OUT_RING( BR00_BITBLT_CLIENT | BR00_OP_SRC_COPY_BLT | 0x4 );
 778                 OUT_RING( pitch | (0xCC << 16));
 779                 OUT_RING( (h << 16) | (w * cpp));
 780                 if (dev_priv->current_page == 0)
 781                   OUT_RING(dev_priv->front_offset + start);
 782                 else
 783                   OUT_RING(dev_priv->back_offset + start);
 784                 OUT_RING( pitch );
 785                 if (dev_priv->current_page == 0)
 786                   OUT_RING(dev_priv->back_offset + start);
 787                 else
 788                   OUT_RING(dev_priv->front_offset + start);
 789                 ADVANCE_LP_RING();
 790         }
 791 }
 792
 793
 794 static void i810_dma_dispatch_vertex(drm_device_t *dev,
 795                                      drm_buf_t *buf,
 796                                      int discard,
 797                                      int used)
 798 {
 799         drm_i810_private_t *dev_priv = dev->dev_private;
 800         drm_i810_buf_priv_t *buf_priv = buf->dev_private;
 801         drm_i810_sarea_t *sarea_priv = dev_priv->sarea_priv;
 802         drm_clip_rect_t *box = sarea_priv->boxes;
 803         int nbox = sarea_priv->nbox;
 804         unsigned long address = (unsigned long)buf->bus_address;
 805         unsigned long start = address - dev->agp->base;
 806         int i = 0;
 807         RING_LOCALS;
 808
 809         i810_kernel_lost_context(dev);
 810
 811         if (nbox > I810_NR_SAREA_CLIPRECTS)
 812                 nbox = I810_NR_SAREA_CLIPRECTS;
 813
 814         if (used > 4*1024)
 815                 used = 0;
 816
 817         if (sarea_priv->dirty)
 818            i810EmitState( dev );
 819
 820         if (buf_priv->currently_mapped == I810_BUF_MAPPED) {
 821                 unsigned int prim = (sarea_priv->vertex_prim & PR_MASK);
 822
 823                 *(u32 *)buf_priv->kernel_virtual = ((GFX_OP_PRIMITIVE | prim | ((used/4)-2)));
 824
 825                 if (used & 4) {
 826                         *(u32 *)((u32)buf_priv->kernel_virtual + used) = 0;
 827                         used += 4;
 828                 }
 829
 830                 i810_unmap_buffer(buf);
 831         }
 832
 833         if (used) {
 834                 do {
 835                         if (i < nbox) {
 836                                 BEGIN_LP_RING(4);
 837                                 OUT_RING( GFX_OP_SCISSOR | SC_UPDATE_SCISSOR |
 838                                           SC_ENABLE );
 839                                 OUT_RING( GFX_OP_SCISSOR_INFO );
 840                                 OUT_RING( box[i].x1 | (box[i].y1<<16) );
 841                                 OUT_RING( (box[i].x2-1) | ((box[i].y2-1)<<16) );
 842                                 ADVANCE_LP_RING();
 843                         }
 844
 845                         BEGIN_LP_RING(4);
 846                         OUT_RING( CMD_OP_BATCH_BUFFER );
 847                         OUT_RING( start | BB1_PROTECTED );
 848                         OUT_RING( start + used - 4 );
 849                         OUT_RING( 0 );
 850                         ADVANCE_LP_RING();
 851
 852                 } while (++i < nbox);
 853         }
 854
 855         if (discard) {
 856                 dev_priv->counter++;
 857
 858                 (void) cmpxchg(buf_priv->in_use, I810_BUF_CLIENT,
 859                                I810_BUF_HARDWARE);
 860
 861                 BEGIN_LP_RING(8);
 862                 OUT_RING( CMD_STORE_DWORD_IDX );
 863                 OUT_RING( 20 );
 864                 OUT_RING( dev_priv->counter );
 865                 OUT_RING( CMD_STORE_DWORD_IDX );
 866                 OUT_RING( buf_priv->my_use_idx );
 867                 OUT_RING( I810_BUF_FREE );
 868                 OUT_RING( CMD_REPORT_HEAD );
 869                 OUT_RING( 0 );
 870                 ADVANCE_LP_RING();
 871         }
 872 }
 873
 874 static void i810_dma_dispatch_flip( drm_device_t *dev )
 875 {
 876         drm_i810_private_t *dev_priv = dev->dev_private;
 877         int pitch = dev_priv->pitch;
 878         RING_LOCALS;
 879
 880         DRM_DEBUG( "%s: page=%d pfCurrentPage=%d\n",
 881                 __FUNCTION__,
 882                 dev_priv->current_page,
 883                 dev_priv->sarea_priv->pf_current_page);
 884
 885         i810_kernel_lost_context(dev);
 886
 887         BEGIN_LP_RING( 2 );
 888         OUT_RING( INST_PARSER_CLIENT | INST_OP_FLUSH | INST_FLUSH_MAP_CACHE );
 889         OUT_RING( 0 );
 890         ADVANCE_LP_RING();
 891
 892         BEGIN_LP_RING( I810_DEST_SETUP_SIZE + 2 );
 893         /* On i815 at least ASYNC is buggy */
 894         /* pitch<<5 is from 11.2.8 p158,
 895            its the pitch / 8 then left shifted 8,
 896            so (pitch >> 3) << 8 */
 897         OUT_RING( CMD_OP_FRONTBUFFER_INFO | (pitch<<5) /*| ASYNC_FLIP */ );
 898         if ( dev_priv->current_page == 0 ) {
 899                 OUT_RING( dev_priv->back_offset );
 900                 dev_priv->current_page = 1;
 901         } else {
 902                 OUT_RING( dev_priv->front_offset );
 903                 dev_priv->current_page = 0;
 904         }
 905         OUT_RING(0);
 906         ADVANCE_LP_RING();
 907
 908         BEGIN_LP_RING(2);
 909         OUT_RING( CMD_OP_WAIT_FOR_EVENT | WAIT_FOR_PLANE_A_FLIP );
 910         OUT_RING( 0 );
 911         ADVANCE_LP_RING();
 912
 913         /* Increment the frame counter.  The client-side 3D driver must
 914          * throttle the framerate by waiting for this value before
 915          * performing the swapbuffer ioctl.
 916          */
 917         dev_priv->sarea_priv->pf_current_page = dev_priv->current_page;
 918
 919 }
 920
 921 static void i810_dma_quiescent(drm_device_t *dev)
 922 {
 923         drm_i810_private_t *dev_priv = dev->dev_private;
 924         RING_LOCALS;
 925
 926 /*      printk("%s\n", __FUNCTION__); */
 927
 928         i810_kernel_lost_context(dev);
 929
 930         BEGIN_LP_RING(4);
 931         OUT_RING( INST_PARSER_CLIENT | INST_OP_FLUSH | INST_FLUSH_MAP_CACHE );
 932         OUT_RING( CMD_REPORT_HEAD );
 933         OUT_RING( 0 );
 934         OUT_RING( 0 );
 935         ADVANCE_LP_RING();
 936
 937         i810_wait_ring( dev, dev_priv->ring.Size - 8 );
 938 }
 939
 940 static int i810_flush_queue(drm_device_t *dev)
 941 {
 942         drm_i810_private_t *dev_priv = dev->dev_private;
 943         drm_device_dma_t *dma = dev->dma;
 944         int i, ret = 0;
 945         RING_LOCALS;
 946
 947 /*      printk("%s\n", __FUNCTION__); */
 948
 949         i810_kernel_lost_context(dev);
 950
 951         BEGIN_LP_RING(2);
 952         OUT_RING( CMD_REPORT_HEAD );
 953         OUT_RING( 0 );
 954         ADVANCE_LP_RING();
 955
 956         i810_wait_ring( dev, dev_priv->ring.Size - 8 );
 957
 958         for (i = 0; i < dma->buf_count; i++) {
 959                 drm_buf_t *buf = dma->buflist[ i ];
 960                 drm_i810_buf_priv_t *buf_priv = buf->dev_private;
 961
 962                 int used = cmpxchg(buf_priv->in_use, I810_BUF_HARDWARE,
 963                                    I810_BUF_FREE);
 964
 965                 if (used == I810_BUF_HARDWARE)
 966                         DRM_DEBUG("reclaimed from HARDWARE\n");
 967                 if (used == I810_BUF_CLIENT)
 968                         DRM_DEBUG("still on client\n");
 969         }
 970
 971         return ret;
 972 }
 973
 974 /* Must be called with the lock held */
 975 void i810_reclaim_buffers(drm_device_t *dev, struct file *filp)
 976 {
 977         drm_device_dma_t *dma = dev->dma;
 978         int              i;
 979
 980         if (!dma) return;
 981         if (!dev->dev_private) return;
 982         if (!dma->buflist) return;
 983
 984         i810_flush_queue(dev);
 985
 986         for (i = 0; i < dma->buf_count; i++) {
 987                 drm_buf_t *buf = dma->buflist[ i ];
 988                 drm_i810_buf_priv_t *buf_priv = buf->dev_private;
 989
 990                 if (buf->filp == filp && buf_priv) {
 991                         int used = cmpxchg(buf_priv->in_use, I810_BUF_CLIENT,
 992                                            I810_BUF_FREE);
 993
 994                         if (used == I810_BUF_CLIENT)
 995                                 DRM_DEBUG("reclaimed from client\n");
 996                         if (buf_priv->currently_mapped == I810_BUF_MAPPED)
 997                                 buf_priv->currently_mapped = I810_BUF_UNMAPPED;
 998                 }
 999         }
1000 }
1001
1002 static int i810_flush_ioctl(struct inode *inode, struct file *filp,
1003                             unsigned int cmd, unsigned long arg)
1004 {
1005         drm_file_t        *priv   = filp->private_data;
1006         drm_device_t      *dev    = priv->head->dev;
1007
1008         LOCK_TEST_WITH_RETURN(dev, filp);
1009
1010         i810_flush_queue(dev);
1011         return 0;
1012 }
1013
1014
1015 static int i810_dma_vertex(struct inode *inode, struct file *filp,
1016                unsigned int cmd, unsigned long arg)
1017 {
1018         drm_file_t *priv = filp->private_data;
1019         drm_device_t *dev = priv->head->dev;
1020         drm_device_dma_t *dma = dev->dma;
1021         drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;
1022         u32 *hw_status = dev_priv->hw_status_page;
1023         drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
1024                                         dev_priv->sarea_priv;
1025         drm_i810_vertex_t vertex;
1026
1027         if (copy_from_user(&vertex, (drm_i810_vertex_t __user *)arg, sizeof(vertex)))
1028                 return -EFAULT;
1029
1030         LOCK_TEST_WITH_RETURN(dev, filp);
1031
1032         DRM_DEBUG("i810 dma vertex, idx %d used %d discard %d\n",
1033                   vertex.idx, vertex.used, vertex.discard);
1034
1035         if (vertex.idx < 0 || vertex.idx > dma->buf_count)
1036                 return -EINVAL;
1037
1038         i810_dma_dispatch_vertex( dev,
1039                                   dma->buflist[ vertex.idx ],
1040                                   vertex.discard, vertex.used );
1041
1042         atomic_add(vertex.used, &dev->counts[_DRM_STAT_SECONDARY]);
1043         atomic_inc(&dev->counts[_DRM_STAT_DMA]);
1044         sarea_priv->last_enqueue = dev_priv->counter-1;
1045         sarea_priv->last_dispatch = (int) hw_status[5];
1046
1047         return 0;
1048 }
1049
1050
1051
1052 static int i810_clear_bufs(struct inode *inode, struct file *filp,
1053                    unsigned int cmd, unsigned long arg)
1054 {
1055         drm_file_t *priv = filp->private_data;
1056         drm_device_t *dev = priv->head->dev;
1057         drm_i810_clear_t clear;
1058
1059         if (copy_from_user(&clear, (drm_i810_clear_t __user *)arg, sizeof(clear)))
1060                 return -EFAULT;
1061
1062         LOCK_TEST_WITH_RETURN(dev, filp);
1063
1064         /* GH: Someone's doing nasty things... */
1065         if (!dev->dev_private) {
1066                 return -EINVAL;
1067         }
1068
1069         i810_dma_dispatch_clear( dev, clear.flags,
1070                                  clear.clear_color,
1071                                  clear.clear_depth );
1072         return 0;
1073 }
1074
1075 static int i810_swap_bufs(struct inode *inode, struct file *filp,
1076                   unsigned int cmd, unsigned long arg)
1077 {
1078         drm_file_t *priv = filp->private_data;
1079         drm_device_t *dev = priv->head->dev;
1080
1081         DRM_DEBUG("i810_swap_bufs\n");
1082
1083         LOCK_TEST_WITH_RETURN(dev, filp);
1084
1085         i810_dma_dispatch_swap( dev );
1086         return 0;
1087 }
1088
1089 static int i810_getage(struct inode *inode, struct file *filp, unsigned int cmd,
1090                 unsigned long arg)
1091 {
1092         drm_file_t        *priv     = filp->private_data;
1093         drm_device_t      *dev      = priv->head->dev;
1094         drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;
1095         u32 *hw_status = dev_priv->hw_status_page;
1096         drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
1097                                         dev_priv->sarea_priv;
1098
1099         sarea_priv->last_dispatch = (int) hw_status[5];
1100         return 0;
1101 }
1102
1103 static int i810_getbuf(struct inode *inode, struct file *filp, unsigned int cmd,
1104                 unsigned long arg)
1105 {
1106         drm_file_t        *priv     = filp->private_data;
1107         drm_device_t      *dev      = priv->head->dev;
1108         int               retcode   = 0;
1109         drm_i810_dma_t    d;
1110         drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;
1111         u32 *hw_status = dev_priv->hw_status_page;
1112         drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
1113                                         dev_priv->sarea_priv;
1114
1115         if (copy_from_user(&d, (drm_i810_dma_t __user *)arg, sizeof(d)))
1116                 return -EFAULT;
1117
1118         LOCK_TEST_WITH_RETURN(dev, filp);
1119
1120         d.granted = 0;
1121
1122         retcode = i810_dma_get_buffer(dev, &d, filp);
1123
1124         DRM_DEBUG("i810_dma: %d returning %d, granted = %d\n",
1125                   current->pid, retcode, d.granted);
1126
1127         if (copy_to_user((drm_dma_t __user *)arg, &d, sizeof(d)))
1128                 return -EFAULT;
1129         sarea_priv->last_dispatch = (int) hw_status[5];
1130
1131         return retcode;
1132 }
1133
1134 static int i810_copybuf(struct inode *inode,
1135                          struct file *filp, unsigned int cmd, unsigned long arg)
1136 {
1137         /* Never copy - 2.4.x doesn't need it */
1138         return 0;
1139 }
1140
1141 static int i810_docopy(struct inode *inode, struct file *filp, unsigned int cmd,
1142                         unsigned long arg)
1143 {
1144         /* Never copy - 2.4.x doesn't need it */
1145         return 0;
1146 }
1147
1148 static void i810_dma_dispatch_mc(drm_device_t *dev, drm_buf_t *buf, int used,
1149                 unsigned int last_render)
1150 {
1151         drm_i810_private_t *dev_priv = dev->dev_private;
1152         drm_i810_buf_priv_t *buf_priv = buf->dev_private;
1153         drm_i810_sarea_t *sarea_priv = dev_priv->sarea_priv;
1154         unsigned long address = (unsigned long)buf->bus_address;
1155         unsigned long start = address - dev->agp->base;
1156         int u;
1157         RING_LOCALS;
1158
1159         i810_kernel_lost_context(dev);
1160
1161         u = cmpxchg(buf_priv->in_use, I810_BUF_CLIENT,
1162                 I810_BUF_HARDWARE);
1163         if (u != I810_BUF_CLIENT) {
1164                 DRM_DEBUG("MC found buffer that isn't mine!\n");
1165         }
1166
1167         if (used > 4*1024)
1168                 used = 0;
1169
1170         sarea_priv->dirty = 0x7f;
1171
1172         DRM_DEBUG("dispatch mc addr 0x%lx, used 0x%x\n",
1173                 address, used);
1174
1175         dev_priv->counter++;
1176         DRM_DEBUG("dispatch counter : %ld\n", dev_priv->counter);
1177         DRM_DEBUG("i810_dma_dispatch_mc\n");
1178         DRM_DEBUG("start : %lx\n", start);
1179         DRM_DEBUG("used : %d\n", used);
1180         DRM_DEBUG("start + used - 4 : %ld\n", start + used - 4);
1181
1182         if (buf_priv->currently_mapped == I810_BUF_MAPPED) {
1183                 if (used & 4) {
1184                         *(u32 *)((u32)buf_priv->virtual + used) = 0;
1185                         used += 4;
1186                 }
1187
1188                 i810_unmap_buffer(buf);
1189         }
1190         BEGIN_LP_RING(4);
1191         OUT_RING( CMD_OP_BATCH_BUFFER );
1192         OUT_RING( start | BB1_PROTECTED );
1193         OUT_RING( start + used - 4 );
1194         OUT_RING( 0 );
1195         ADVANCE_LP_RING();
1196
1197
1198         BEGIN_LP_RING(8);
1199         OUT_RING( CMD_STORE_DWORD_IDX );
1200         OUT_RING( buf_priv->my_use_idx );
1201         OUT_RING( I810_BUF_FREE );
1202         OUT_RING( 0 );
1203
1204         OUT_RING( CMD_STORE_DWORD_IDX );
1205         OUT_RING( 16 );
1206         OUT_RING( last_render );
1207         OUT_RING( 0 );
1208         ADVANCE_LP_RING();
1209 }
1210
1211 static int i810_dma_mc(struct inode *inode, struct file *filp,
1212         unsigned int cmd, unsigned long arg)
1213 {
1214         drm_file_t *priv = filp->private_data;
1215         drm_device_t *dev = priv->head->dev;
1216         drm_device_dma_t *dma = dev->dma;
1217         drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;
1218         u32 *hw_status = dev_priv->hw_status_page;
1219         drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
1220                 dev_priv->sarea_priv;
1221         drm_i810_mc_t mc;
1222
1223         if (copy_from_user(&mc, (drm_i810_mc_t __user *)arg, sizeof(mc)))
1224                 return -EFAULT;
1225
1226         LOCK_TEST_WITH_RETURN(dev, filp);
1227
1228         if (mc.idx >= dma->buf_count || mc.idx < 0)
1229                 return -EINVAL;
1230
1231         i810_dma_dispatch_mc(dev, dma->buflist[mc.idx], mc.used,
1232                 mc.last_render );
1233
1234         atomic_add(mc.used, &dev->counts[_DRM_STAT_SECONDARY]);
1235         atomic_inc(&dev->counts[_DRM_STAT_DMA]);
1236         sarea_priv->last_enqueue = dev_priv->counter-1;
1237         sarea_priv->last_dispatch = (int) hw_status[5];
1238
1239         return 0;
1240 }
1241
1242 static int i810_rstatus(struct inode *inode, struct file *filp,
1243                         unsigned int cmd, unsigned long arg)
1244 {
1245         drm_file_t *priv = filp->private_data;
1246         drm_device_t *dev = priv->head->dev;
1247         drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;
1248
1249         return (int)(((u32 *)(dev_priv->hw_status_page))[4]);
1250 }
1251
1252 static int i810_ov0_info(struct inode *inode, struct file *filp,
1253                         unsigned int cmd, unsigned long arg)
1254 {
1255         drm_file_t *priv = filp->private_data;
1256         drm_device_t *dev = priv->head->dev;
1257         drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;
1258         drm_i810_overlay_t data;
1259
1260         data.offset = dev_priv->overlay_offset;
1261         data.physical = dev_priv->overlay_physical;
1262         if (copy_to_user((drm_i810_overlay_t __user *)arg,&data,sizeof(data)))
1263                 return -EFAULT;
1264         return 0;
1265 }
1266
1267 static int i810_fstatus(struct inode *inode, struct file *filp,
1268                         unsigned int cmd, unsigned long arg)
1269 {
1270         drm_file_t *priv = filp->private_data;
1271         drm_device_t *dev = priv->head->dev;
1272         drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;
1273
1274         LOCK_TEST_WITH_RETURN(dev, filp);
1275
1276         return I810_READ(0x30008);
1277 }
1278
1279 static int i810_ov0_flip(struct inode *inode, struct file *filp,
1280                         unsigned int cmd, unsigned long arg)
1281 {
1282         drm_file_t *priv = filp->private_data;
1283         drm_device_t *dev = priv->head->dev;
1284         drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;
1285
1286         LOCK_TEST_WITH_RETURN(dev, filp);
1287
1288         //Tell the overlay to update
1289         I810_WRITE(0x30000,dev_priv->overlay_physical | 0x80000000);
1290
1291         return 0;
1292 }
1293
1294
1295 /* Not sure why this isn't set all the time:
1296  */
1297 static void i810_do_init_pageflip( drm_device_t *dev )
1298 {
1299         drm_i810_private_t *dev_priv = dev->dev_private;
1300
1301         DRM_DEBUG("%s\n", __FUNCTION__);
1302         dev_priv->page_flipping = 1;
1303         dev_priv->current_page = 0;
1304         dev_priv->sarea_priv->pf_current_page = dev_priv->current_page;
1305 }
1306
1307 static int i810_do_cleanup_pageflip( drm_device_t *dev )
1308 {
1309         drm_i810_private_t *dev_priv = dev->dev_private;
1310
1311         DRM_DEBUG("%s\n", __FUNCTION__);
1312         if (dev_priv->current_page != 0)
1313                 i810_dma_dispatch_flip( dev );
1314
1315         dev_priv->page_flipping = 0;
1316         return 0;
1317 }
1318
1319 static int i810_flip_bufs(struct inode *inode, struct file *filp,
1320                         unsigned int cmd, unsigned long arg)
1321 {
1322         drm_file_t *priv = filp->private_data;
1323         drm_device_t *dev = priv->head->dev;
1324         drm_i810_private_t *dev_priv = dev->dev_private;
1325
1326         DRM_DEBUG("%s\n", __FUNCTION__);
1327
1328         LOCK_TEST_WITH_RETURN(dev, filp);
1329
1330         if (!dev_priv->page_flipping)
1331                 i810_do_init_pageflip( dev );
1332
1333         i810_dma_dispatch_flip( dev );
1334         return 0;
1335 }
1336
1337 void i810_driver_pretakedown(drm_device_t *dev)
1338 {
1339         i810_dma_cleanup( dev );
1340 }
1341
1342 void i810_driver_prerelease(drm_device_t *dev, DRMFILE filp)
1343 {
1344         if (dev->dev_private) {
1345                 drm_i810_private_t *dev_priv = dev->dev_private;
1346                 if (dev_priv->page_flipping) {
1347                         i810_do_cleanup_pageflip(dev);
1348                 }
1349         }
1350 }
1351
1352 void i810_driver_release(drm_device_t *dev, struct file *filp)
1353 {
1354         i810_reclaim_buffers(dev, filp);
1355 }
1356
1357 int i810_driver_dma_quiescent(drm_device_t *dev)
1358 {
1359         i810_dma_quiescent( dev );
1360         return 0;
1361 }
1362
1363 drm_ioctl_desc_t i810_ioctls[] = {
1364         [DRM_IOCTL_NR(DRM_I810_INIT)]    = { i810_dma_init,    1, 1 },
1365         [DRM_IOCTL_NR(DRM_I810_VERTEX)]  = { i810_dma_vertex,  1, 0 },
1366         [DRM_IOCTL_NR(DRM_I810_CLEAR)]   = { i810_clear_bufs,  1, 0 },
1367         [DRM_IOCTL_NR(DRM_I810_FLUSH)]   = { i810_flush_ioctl, 1, 0 },
1368         [DRM_IOCTL_NR(DRM_I810_GETAGE)]  = { i810_getage,      1, 0 },
1369         [DRM_IOCTL_NR(DRM_I810_GETBUF)]  = { i810_getbuf,      1, 0 },
1370         [DRM_IOCTL_NR(DRM_I810_SWAP)]    = { i810_swap_bufs,   1, 0 },
1371         [DRM_IOCTL_NR(DRM_I810_COPY)]    = { i810_copybuf,     1, 0 },
1372         [DRM_IOCTL_NR(DRM_I810_DOCOPY)]  = { i810_docopy,      1, 0 },
1373         [DRM_IOCTL_NR(DRM_I810_OV0INFO)] = { i810_ov0_info,    1, 0 },
1374         [DRM_IOCTL_NR(DRM_I810_FSTATUS)] = { i810_fstatus,     1, 0 },
1375         [DRM_IOCTL_NR(DRM_I810_OV0FLIP)] = { i810_ov0_flip,    1, 0 },
1376         [DRM_IOCTL_NR(DRM_I810_MC)]      = { i810_dma_mc,      1, 1 },
1377         [DRM_IOCTL_NR(DRM_I810_RSTATUS)] = { i810_rstatus,     1, 0 },
1378         [DRM_IOCTL_NR(DRM_I810_FLIP)]    = { i810_flip_bufs,   1, 0 }
1379 };
1380
1381 int i810_max_ioctl = DRM_ARRAY_SIZE(i810_ioctls);
1382
1383 /**
1384  * Determine if the device really is AGP or not.
1385  *
1386  * All Intel graphics chipsets are treated as AGP, even if they are really
1387  * PCI-e.
1388  *
1389  * \param dev   The device to be tested.
1390  *
1391  * \returns
1392  * A value of 1 is always retured to indictate every i810 is AGP.
1393  */
1394 int i810_driver_device_is_agp(drm_device_t * dev)
1395 {
1396         return 1;
1397 }