git.oblomov.eu Git - linux-2.6/blob - 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, vma->vm_page_prot))
 111                 return -EAGAIN;
 112         return 0;
 113 }
 114
 115 static struct file_operations i810_buffer_fops = {
 116         .open = drm_open,
 117         .release = drm_release,
 118         .ioctl = drm_ioctl,
 119         .mmap = i810_mmap_buffers,
 120         .fasync = drm_fasync,
 121 };
 122
 123 static int i810_map_buffer(drm_buf_t * buf, struct file *filp)
 124 {
 125         drm_file_t *priv = filp->private_data;
 126         drm_device_t *dev = priv->head->dev;
 127         drm_i810_buf_priv_t *buf_priv = buf->dev_private;
 128         drm_i810_private_t *dev_priv = dev->dev_private;
 129         struct file_operations *old_fops;
 130         int retcode = 0;
 131
 132         if (buf_priv->currently_mapped == I810_BUF_MAPPED)
 133                 return -EINVAL;
 134
 135         down_write(&current->mm->mmap_sem);
 136         old_fops = filp->f_op;
 137         filp->f_op = &i810_buffer_fops;
 138         dev_priv->mmap_buffer = buf;
 139         buf_priv->virtual = (void *)do_mmap(filp, 0, buf->total,
 140                                             PROT_READ | PROT_WRITE,
 141                                             MAP_SHARED, buf->bus_address);
 142         dev_priv->mmap_buffer = NULL;
 143         filp->f_op = old_fops;
 144         if ((unsigned long)buf_priv->virtual > -1024UL) {
 145                 /* Real error */
 146                 DRM_ERROR("mmap error\n");
 147                 retcode = (signed int)buf_priv->virtual;
 148                 buf_priv->virtual = NULL;
 149         }
 150         up_write(&current->mm->mmap_sem);
 151
 152         return retcode;
 153 }
 154
 155 static int i810_unmap_buffer(drm_buf_t * buf)
 156 {
 157         drm_i810_buf_priv_t *buf_priv = buf->dev_private;
 158         int retcode = 0;
 159
 160         if (buf_priv->currently_mapped != I810_BUF_MAPPED)
 161                 return -EINVAL;
 162
 163         down_write(&current->mm->mmap_sem);
 164         retcode = do_munmap(current->mm,
 165                             (unsigned long)buf_priv->virtual,
 166                             (size_t) buf->total);
 167         up_write(&current->mm->mmap_sem);
 168
 169         buf_priv->currently_mapped = I810_BUF_UNMAPPED;
 170         buf_priv->virtual = NULL;
 171
 172         return retcode;
 173 }
 174
 175 static int i810_dma_get_buffer(drm_device_t * dev, drm_i810_dma_t * d,
 176                                struct file *filp)
 177 {
 178         drm_buf_t *buf;
 179         drm_i810_buf_priv_t *buf_priv;
 180         int retcode = 0;
 181
 182         buf = i810_freelist_get(dev);
 183         if (!buf) {
 184                 retcode = -ENOMEM;
 185                 DRM_DEBUG("retcode=%d\n", retcode);
 186                 return retcode;
 187         }
 188
 189         retcode = i810_map_buffer(buf, filp);
 190         if (retcode) {
 191                 i810_freelist_put(dev, buf);
 192                 DRM_ERROR("mapbuf failed, retcode %d\n", retcode);
 193                 return retcode;
 194         }
 195         buf->filp = filp;
 196         buf_priv = buf->dev_private;
 197         d->granted = 1;
 198         d->request_idx = buf->idx;
 199         d->request_size = buf->total;
 200         d->virtual = buf_priv->virtual;
 201
 202         return retcode;
 203 }
 204
 205 static int i810_dma_cleanup(drm_device_t * dev)
 206 {
 207         drm_device_dma_t *dma = dev->dma;
 208
 209         /* Make sure interrupts are disabled here because the uninstall ioctl
 210          * may not have been called from userspace and after dev_private
 211          * is freed, it's too late.
 212          */
 213         if (drm_core_check_feature(dev, DRIVER_HAVE_IRQ) && dev->irq_enabled)
 214                 drm_irq_uninstall(dev);
 215
 216         if (dev->dev_private) {
 217                 int i;
 218                 drm_i810_private_t *dev_priv =
 219                     (drm_i810_private_t *) dev->dev_private;
 220
 221                 if (dev_priv->ring.virtual_start) {
 222                         drm_ioremapfree((void *)dev_priv->ring.virtual_start,
 223                                         dev_priv->ring.Size, dev);
 224                 }
 225                 if (dev_priv->hw_status_page) {
 226                         pci_free_consistent(dev->pdev, PAGE_SIZE,
 227                                             dev_priv->hw_status_page,
 228                                             dev_priv->dma_status_page);
 229                         /* Need to rewrite hardware status page */
 230                         I810_WRITE(0x02080, 0x1ffff000);
 231                 }
 232                 drm_free(dev->dev_private, sizeof(drm_i810_private_t),
 233                          DRM_MEM_DRIVER);
 234                 dev->dev_private = NULL;
 235
 236                 for (i = 0; i < dma->buf_count; i++) {
 237                         drm_buf_t *buf = dma->buflist[i];
 238                         drm_i810_buf_priv_t *buf_priv = buf->dev_private;
 239                         if (buf_priv->kernel_virtual && buf->total)
 240                                 drm_ioremapfree(buf_priv->kernel_virtual,
 241                                                 buf->total, dev);
 242                 }
 243         }
 244         return 0;
 245 }
 246
 247 static int i810_wait_ring(drm_device_t * dev, int n)
 248 {
 249         drm_i810_private_t *dev_priv = dev->dev_private;
 250         drm_i810_ring_buffer_t *ring = &(dev_priv->ring);
 251         int iters = 0;
 252         unsigned long end;
 253         unsigned int last_head = I810_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
 254
 255         end = jiffies + (HZ * 3);
 256         while (ring->space < n) {
 257                 ring->head = I810_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
 258                 ring->space = ring->head - (ring->tail + 8);
 259                 if (ring->space < 0)
 260                         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)
 289                 ring->space += ring->Size;
 290 }
 291
 292 static int i810_freelist_init(drm_device_t * dev, drm_i810_private_t * dev_priv)
 293 {
 294         drm_device_dma_t *dma = dev->dma;
 295         int my_idx = 24;
 296         u32 *hw_status = (u32 *) (dev_priv->hw_status_page + my_idx);
 297         int i;
 298
 299         if (dma->buf_count > 1019) {
 300                 /* Not enough space in the status page for the freelist */
 301                 return -EINVAL;
 302         }
 303
 304         for (i = 0; i < dma->buf_count; i++) {
 305                 drm_buf_t *buf = dma->buflist[i];
 306                 drm_i810_buf_priv_t *buf_priv = buf->dev_private;
 307
 308                 buf_priv->in_use = hw_status++;
 309                 buf_priv->my_use_idx = my_idx;
 310                 my_idx += 4;
 311
 312                 *buf_priv->in_use = I810_BUF_FREE;
 313
 314                 buf_priv->kernel_virtual = drm_ioremap(buf->bus_address,
 315                                                        buf->total, dev);
 316         }
 317         return 0;
 318 }
 319
 320 static int i810_dma_initialize(drm_device_t * dev,
 321                                drm_i810_private_t * dev_priv,
 322                                drm_i810_init_t * init)
 323 {
 324         struct list_head *list;
 325
 326         memset(dev_priv, 0, sizeof(drm_i810_private_t));
 327
 328         list_for_each(list, &dev->maplist->head) {
 329                 drm_map_list_t *r_list = list_entry(list, drm_map_list_t, head);
 330                 if (r_list->map &&
 331                     r_list->map->type == _DRM_SHM &&
 332                     r_list->map->flags & _DRM_CONTAINS_LOCK) {
 333                         dev_priv->sarea_map = r_list->map;
 334                         break;
 335                 }
 336         }
 337         if (!dev_priv->sarea_map) {
 338                 dev->dev_private = (void *)dev_priv;
 339                 i810_dma_cleanup(dev);
 340                 DRM_ERROR("can not find sarea!\n");
 341                 return -EINVAL;
 342         }
 343         dev_priv->mmio_map = drm_core_findmap(dev, init->mmio_offset);
 344         if (!dev_priv->mmio_map) {
 345                 dev->dev_private = (void *)dev_priv;
 346                 i810_dma_cleanup(dev);
 347                 DRM_ERROR("can not find mmio map!\n");
 348                 return -EINVAL;
 349         }
 350         dev->agp_buffer_token = init->buffers_offset;
 351         dev->agp_buffer_map = drm_core_findmap(dev, init->buffers_offset);
 352         if (!dev->agp_buffer_map) {
 353                 dev->dev_private = (void *)dev_priv;
 354                 i810_dma_cleanup(dev);
 355                 DRM_ERROR("can not find dma buffer map!\n");
 356                 return -EINVAL;
 357         }
 358
 359         dev_priv->sarea_priv = (drm_i810_sarea_t *)
 360             ((u8 *) dev_priv->sarea_map->handle + 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
 477             (&init, (void __user *)arg, sizeof(drm_i810_init_func_t)))
 478                 return -EFAULT;
 479
 480         switch (init.func) {
 481         case I810_INIT_DMA:
 482                 /* This case is for backward compatibility. It
 483                  * handles XFree 4.1.0 and 4.2.0, and has to
 484                  * do some parameter checking as described below.
 485                  * It will someday go away.
 486                  */
 487                 retcode = i810_dma_init_compat(&init, arg);
 488                 if (retcode)
 489                         return retcode;
 490
 491                 dev_priv = drm_alloc(sizeof(drm_i810_private_t),
 492                                      DRM_MEM_DRIVER);
 493                 if (dev_priv == NULL)
 494                         return -ENOMEM;
 495                 retcode = i810_dma_initialize(dev, dev_priv, &init);
 496                 break;
 497
 498         default:
 499         case I810_INIT_DMA_1_4:
 500                 DRM_INFO("Using v1.4 init.\n");
 501                 if (copy_from_user(&init, (drm_i810_init_t __user *) arg,
 502                                    sizeof(drm_i810_init_t))) {
 503                         return -EFAULT;
 504                 }
 505                 dev_priv = drm_alloc(sizeof(drm_i810_private_t),
 506                                      DRM_MEM_DRIVER);
 507                 if (dev_priv == NULL)
 508                         return -ENOMEM;
 509                 retcode = i810_dma_initialize(dev, dev_priv, &init);
 510                 break;
 511
 512         case I810_CLEANUP_DMA:
 513                 DRM_INFO("DMA Cleanup\n");
 514                 retcode = i810_dma_cleanup(dev);
 515                 break;
 516         }
 517
 518         return retcode;
 519 }
 520
 521 /* Most efficient way to verify state for the i810 is as it is
 522  * emitted.  Non-conformant state is silently dropped.
 523  *
 524  * Use 'volatile' & local var tmp to force the emitted values to be
 525  * identical to the verified ones.
 526  */
 527 static void i810EmitContextVerified(drm_device_t * dev,
 528                                     volatile unsigned int *code)
 529 {
 530         drm_i810_private_t *dev_priv = dev->dev_private;
 531         int i, j = 0;
 532         unsigned int tmp;
 533         RING_LOCALS;
 534
 535         BEGIN_LP_RING(I810_CTX_SETUP_SIZE);
 536
 537         OUT_RING(GFX_OP_COLOR_FACTOR);
 538         OUT_RING(code[I810_CTXREG_CF1]);
 539
 540         OUT_RING(GFX_OP_STIPPLE);
 541         OUT_RING(code[I810_CTXREG_ST1]);
 542
 543         for (i = 4; i < I810_CTX_SETUP_SIZE; i++) {
 544                 tmp = code[i];
 545
 546                 if ((tmp & (7 << 29)) == (3 << 29) &&
 547                     (tmp & (0x1f << 24)) < (0x1d << 24)) {
 548                         OUT_RING(tmp);
 549                         j++;
 550                 } else
 551                         printk("constext state dropped!!!\n");
 552         }
 553
 554         if (j & 1)
 555                 OUT_RING(0);
 556
 557         ADVANCE_LP_RING();
 558 }
 559
 560 static void i810EmitTexVerified(drm_device_t * dev, volatile unsigned int *code)
 561 {
 562         drm_i810_private_t *dev_priv = dev->dev_private;
 563         int i, j = 0;
 564         unsigned int tmp;
 565         RING_LOCALS;
 566
 567         BEGIN_LP_RING(I810_TEX_SETUP_SIZE);
 568
 569         OUT_RING(GFX_OP_MAP_INFO);
 570         OUT_RING(code[I810_TEXREG_MI1]);
 571         OUT_RING(code[I810_TEXREG_MI2]);
 572         OUT_RING(code[I810_TEXREG_MI3]);
 573
 574         for (i = 4; i < I810_TEX_SETUP_SIZE; i++) {
 575                 tmp = code[i];
 576
 577                 if ((tmp & (7 << 29)) == (3 << 29) &&
 578                     (tmp & (0x1f << 24)) < (0x1d << 24)) {
 579                         OUT_RING(tmp);
 580                         j++;
 581                 } else
 582                         printk("texture state dropped!!!\n");
 583         }
 584
 585         if (j & 1)
 586                 OUT_RING(0);
 587
 588         ADVANCE_LP_RING();
 589 }
 590
 591 /* Need to do some additional checking when setting the dest buffer.
 592  */
 593 static void i810EmitDestVerified(drm_device_t * dev,
 594                                  volatile unsigned int *code)
 595 {
 596         drm_i810_private_t *dev_priv = dev->dev_private;
 597         unsigned int tmp;
 598         RING_LOCALS;
 599
 600         BEGIN_LP_RING(I810_DEST_SETUP_SIZE + 2);
 601
 602         tmp = code[I810_DESTREG_DI1];
 603         if (tmp == dev_priv->front_di1 || tmp == dev_priv->back_di1) {
 604                 OUT_RING(CMD_OP_DESTBUFFER_INFO);
 605                 OUT_RING(tmp);
 606         } else
 607                 DRM_DEBUG("bad di1 %x (allow %x or %x)\n",
 608                           tmp, dev_priv->front_di1, dev_priv->back_di1);
 609
 610         /* invarient:
 611          */
 612         OUT_RING(CMD_OP_Z_BUFFER_INFO);
 613         OUT_RING(dev_priv->zi1);
 614
 615         OUT_RING(GFX_OP_DESTBUFFER_VARS);
 616         OUT_RING(code[I810_DESTREG_DV1]);
 617
 618         OUT_RING(GFX_OP_DRAWRECT_INFO);
 619         OUT_RING(code[I810_DESTREG_DR1]);
 620         OUT_RING(code[I810_DESTREG_DR2]);
 621         OUT_RING(code[I810_DESTREG_DR3]);
 622         OUT_RING(code[I810_DESTREG_DR4]);
 623         OUT_RING(0);
 624
 625         ADVANCE_LP_RING();
 626 }
 627
 628 static void i810EmitState(drm_device_t * dev)
 629 {
 630         drm_i810_private_t *dev_priv = dev->dev_private;
 631         drm_i810_sarea_t *sarea_priv = dev_priv->sarea_priv;
 632         unsigned int dirty = sarea_priv->dirty;
 633
 634         DRM_DEBUG("%s %x\n", __FUNCTION__, dirty);
 635
 636         if (dirty & I810_UPLOAD_BUFFERS) {
 637                 i810EmitDestVerified(dev, sarea_priv->BufferState);
 638                 sarea_priv->dirty &= ~I810_UPLOAD_BUFFERS;
 639         }
 640
 641         if (dirty & I810_UPLOAD_CTX) {
 642                 i810EmitContextVerified(dev, sarea_priv->ContextState);
 643                 sarea_priv->dirty &= ~I810_UPLOAD_CTX;
 644         }
 645
 646         if (dirty & I810_UPLOAD_TEX0) {
 647                 i810EmitTexVerified(dev, sarea_priv->TexState[0]);
 648                 sarea_priv->dirty &= ~I810_UPLOAD_TEX0;
 649         }
 650
 651         if (dirty & I810_UPLOAD_TEX1) {
 652                 i810EmitTexVerified(dev, sarea_priv->TexState[1]);
 653                 sarea_priv->dirty &= ~I810_UPLOAD_TEX1;
 654         }
 655 }
 656
 657 /* need to verify
 658  */
 659 static void i810_dma_dispatch_clear(drm_device_t * dev, int flags,
 660                                     unsigned int clear_color,
 661                                     unsigned int clear_zval)
 662 {
 663         drm_i810_private_t *dev_priv = dev->dev_private;
 664         drm_i810_sarea_t *sarea_priv = dev_priv->sarea_priv;
 665         int nbox = sarea_priv->nbox;
 666         drm_clip_rect_t *pbox = sarea_priv->boxes;
 667         int pitch = dev_priv->pitch;
 668         int cpp = 2;
 669         int i;
 670         RING_LOCALS;
 671
 672         if (dev_priv->current_page == 1) {
 673                 unsigned int tmp = flags;
 674
 675                 flags &= ~(I810_FRONT | I810_BACK);
 676                 if (tmp & I810_FRONT)
 677                         flags |= I810_BACK;
 678                 if (tmp & I810_BACK)
 679                         flags |= I810_FRONT;
 680         }
 681
 682         i810_kernel_lost_context(dev);
 683
 684         if (nbox > I810_NR_SAREA_CLIPRECTS)
 685                 nbox = I810_NR_SAREA_CLIPRECTS;
 686
 687         for (i = 0; i < nbox; i++, pbox++) {
 688                 unsigned int x = pbox->x1;
 689                 unsigned int y = pbox->y1;
 690                 unsigned int width = (pbox->x2 - x) * cpp;
 691                 unsigned int height = pbox->y2 - y;
 692                 unsigned int start = y * pitch + x * cpp;
 693
 694                 if (pbox->x1 > pbox->x2 ||
 695                     pbox->y1 > pbox->y2 ||
 696                     pbox->x2 > dev_priv->w || pbox->y2 > dev_priv->h)
 697                         continue;
 698
 699                 if (flags & I810_FRONT) {
 700                         BEGIN_LP_RING(6);
 701                         OUT_RING(BR00_BITBLT_CLIENT | BR00_OP_COLOR_BLT | 0x3);
 702                         OUT_RING(BR13_SOLID_PATTERN | (0xF0 << 16) | pitch);
 703                         OUT_RING((height << 16) | width);
 704                         OUT_RING(start);
 705                         OUT_RING(clear_color);
 706                         OUT_RING(0);
 707                         ADVANCE_LP_RING();
 708                 }
 709
 710                 if (flags & I810_BACK) {
 711                         BEGIN_LP_RING(6);
 712                         OUT_RING(BR00_BITBLT_CLIENT | BR00_OP_COLOR_BLT | 0x3);
 713                         OUT_RING(BR13_SOLID_PATTERN | (0xF0 << 16) | pitch);
 714                         OUT_RING((height << 16) | width);
 715                         OUT_RING(dev_priv->back_offset + start);
 716                         OUT_RING(clear_color);
 717                         OUT_RING(0);
 718                         ADVANCE_LP_RING();
 719                 }
 720
 721                 if (flags & I810_DEPTH) {
 722                         BEGIN_LP_RING(6);
 723                         OUT_RING(BR00_BITBLT_CLIENT | BR00_OP_COLOR_BLT | 0x3);
 724                         OUT_RING(BR13_SOLID_PATTERN | (0xF0 << 16) | pitch);
 725                         OUT_RING((height << 16) | width);
 726                         OUT_RING(dev_priv->depth_offset + start);
 727                         OUT_RING(clear_zval);
 728                         OUT_RING(0);
 729                         ADVANCE_LP_RING();
 730                 }
 731         }
 732 }
 733
 734 static void i810_dma_dispatch_swap(drm_device_t * dev)
 735 {
 736         drm_i810_private_t *dev_priv = dev->dev_private;
 737         drm_i810_sarea_t *sarea_priv = dev_priv->sarea_priv;
 738         int nbox = sarea_priv->nbox;
 739         drm_clip_rect_t *pbox = sarea_priv->boxes;
 740         int pitch = dev_priv->pitch;
 741         int cpp = 2;
 742         int i;
 743         RING_LOCALS;
 744
 745         DRM_DEBUG("swapbuffers\n");
 746
 747         i810_kernel_lost_context(dev);
 748
 749         if (nbox > I810_NR_SAREA_CLIPRECTS)
 750                 nbox = I810_NR_SAREA_CLIPRECTS;
 751
 752         for (i = 0; i < nbox; i++, pbox++) {
 753                 unsigned int w = pbox->x2 - pbox->x1;
 754                 unsigned int h = pbox->y2 - pbox->y1;
 755                 unsigned int dst = pbox->x1 * cpp + pbox->y1 * pitch;
 756                 unsigned int start = dst;
 757
 758                 if (pbox->x1 > pbox->x2 ||
 759                     pbox->y1 > pbox->y2 ||
 760                     pbox->x2 > dev_priv->w || pbox->y2 > dev_priv->h)
 761                         continue;
 762
 763                 BEGIN_LP_RING(6);
 764                 OUT_RING(BR00_BITBLT_CLIENT | BR00_OP_SRC_COPY_BLT | 0x4);
 765                 OUT_RING(pitch | (0xCC << 16));
 766                 OUT_RING((h << 16) | (w * cpp));
 767                 if (dev_priv->current_page == 0)
 768                         OUT_RING(dev_priv->front_offset + start);
 769                 else
 770                         OUT_RING(dev_priv->back_offset + start);
 771                 OUT_RING(pitch);
 772                 if (dev_priv->current_page == 0)
 773                         OUT_RING(dev_priv->back_offset + start);
 774                 else
 775                         OUT_RING(dev_priv->front_offset + start);
 776                 ADVANCE_LP_RING();
 777         }
 778 }
 779
 780 static void i810_dma_dispatch_vertex(drm_device_t * dev,
 781                                      drm_buf_t * buf, int discard, int used)
 782 {
 783         drm_i810_private_t *dev_priv = dev->dev_private;
 784         drm_i810_buf_priv_t *buf_priv = buf->dev_private;
 785         drm_i810_sarea_t *sarea_priv = dev_priv->sarea_priv;
 786         drm_clip_rect_t *box = sarea_priv->boxes;
 787         int nbox = sarea_priv->nbox;
 788         unsigned long address = (unsigned long)buf->bus_address;
 789         unsigned long start = address - dev->agp->base;
 790         int i = 0;
 791         RING_LOCALS;
 792
 793         i810_kernel_lost_context(dev);
 794
 795         if (nbox > I810_NR_SAREA_CLIPRECTS)
 796                 nbox = I810_NR_SAREA_CLIPRECTS;
 797
 798         if (used > 4 * 1024)
 799                 used = 0;
 800
 801         if (sarea_priv->dirty)
 802                 i810EmitState(dev);
 803
 804         if (buf_priv->currently_mapped == I810_BUF_MAPPED) {
 805                 unsigned int prim = (sarea_priv->vertex_prim & PR_MASK);
 806
 807                 *(u32 *) buf_priv->kernel_virtual =
 808                     ((GFX_OP_PRIMITIVE | prim | ((used / 4) - 2)));
 809
 810                 if (used & 4) {
 811                         *(u32 *) ((u32) buf_priv->kernel_virtual + used) = 0;
 812                         used += 4;
 813                 }
 814
 815                 i810_unmap_buffer(buf);
 816         }
 817
 818         if (used) {
 819                 do {
 820                         if (i < nbox) {
 821                                 BEGIN_LP_RING(4);
 822                                 OUT_RING(GFX_OP_SCISSOR | SC_UPDATE_SCISSOR |
 823                                          SC_ENABLE);
 824                                 OUT_RING(GFX_OP_SCISSOR_INFO);
 825                                 OUT_RING(box[i].x1 | (box[i].y1 << 16));
 826                                 OUT_RING((box[i].x2 -
 827                                           1) | ((box[i].y2 - 1) << 16));
 828                                 ADVANCE_LP_RING();
 829                         }
 830
 831                         BEGIN_LP_RING(4);
 832                         OUT_RING(CMD_OP_BATCH_BUFFER);
 833                         OUT_RING(start | BB1_PROTECTED);
 834                         OUT_RING(start + used - 4);
 835                         OUT_RING(0);
 836                         ADVANCE_LP_RING();
 837
 838                 } while (++i < nbox);
 839         }
 840
 841         if (discard) {
 842                 dev_priv->counter++;
 843
 844                 (void)cmpxchg(buf_priv->in_use, I810_BUF_CLIENT,
 845                               I810_BUF_HARDWARE);
 846
 847                 BEGIN_LP_RING(8);
 848                 OUT_RING(CMD_STORE_DWORD_IDX);
 849                 OUT_RING(20);
 850                 OUT_RING(dev_priv->counter);
 851                 OUT_RING(CMD_STORE_DWORD_IDX);
 852                 OUT_RING(buf_priv->my_use_idx);
 853                 OUT_RING(I810_BUF_FREE);
 854                 OUT_RING(CMD_REPORT_HEAD);
 855                 OUT_RING(0);
 856                 ADVANCE_LP_RING();
 857         }
 858 }
 859
 860 static void i810_dma_dispatch_flip(drm_device_t * dev)
 861 {
 862         drm_i810_private_t *dev_priv = dev->dev_private;
 863         int pitch = dev_priv->pitch;
 864         RING_LOCALS;
 865
 866         DRM_DEBUG("%s: page=%d pfCurrentPage=%d\n",
 867                   __FUNCTION__,
 868                   dev_priv->current_page,
 869                   dev_priv->sarea_priv->pf_current_page);
 870
 871         i810_kernel_lost_context(dev);
 872
 873         BEGIN_LP_RING(2);
 874         OUT_RING(INST_PARSER_CLIENT | INST_OP_FLUSH | INST_FLUSH_MAP_CACHE);
 875         OUT_RING(0);
 876         ADVANCE_LP_RING();
 877
 878         BEGIN_LP_RING(I810_DEST_SETUP_SIZE + 2);
 879         /* On i815 at least ASYNC is buggy */
 880         /* pitch<<5 is from 11.2.8 p158,
 881            its the pitch / 8 then left shifted 8,
 882            so (pitch >> 3) << 8 */
 883         OUT_RING(CMD_OP_FRONTBUFFER_INFO | (pitch << 5) /*| ASYNC_FLIP */ );
 884         if (dev_priv->current_page == 0) {
 885                 OUT_RING(dev_priv->back_offset);
 886                 dev_priv->current_page = 1;
 887         } else {
 888                 OUT_RING(dev_priv->front_offset);
 889                 dev_priv->current_page = 0;
 890         }
 891         OUT_RING(0);
 892         ADVANCE_LP_RING();
 893
 894         BEGIN_LP_RING(2);
 895         OUT_RING(CMD_OP_WAIT_FOR_EVENT | WAIT_FOR_PLANE_A_FLIP);
 896         OUT_RING(0);
 897         ADVANCE_LP_RING();
 898
 899         /* Increment the frame counter.  The client-side 3D driver must
 900          * throttle the framerate by waiting for this value before
 901          * performing the swapbuffer ioctl.
 902          */
 903         dev_priv->sarea_priv->pf_current_page = dev_priv->current_page;
 904
 905 }
 906
 907 static void i810_dma_quiescent(drm_device_t * dev)
 908 {
 909         drm_i810_private_t *dev_priv = dev->dev_private;
 910         RING_LOCALS;
 911
 912 /*      printk("%s\n", __FUNCTION__); */
 913
 914         i810_kernel_lost_context(dev);
 915
 916         BEGIN_LP_RING(4);
 917         OUT_RING(INST_PARSER_CLIENT | INST_OP_FLUSH | INST_FLUSH_MAP_CACHE);
 918         OUT_RING(CMD_REPORT_HEAD);
 919         OUT_RING(0);
 920         OUT_RING(0);
 921         ADVANCE_LP_RING();
 922
 923         i810_wait_ring(dev, dev_priv->ring.Size - 8);
 924 }
 925
 926 static int i810_flush_queue(drm_device_t * dev)
 927 {
 928         drm_i810_private_t *dev_priv = dev->dev_private;
 929         drm_device_dma_t *dma = dev->dma;
 930         int i, ret = 0;
 931         RING_LOCALS;
 932
 933 /*      printk("%s\n", __FUNCTION__); */
 934
 935         i810_kernel_lost_context(dev);
 936
 937         BEGIN_LP_RING(2);
 938         OUT_RING(CMD_REPORT_HEAD);
 939         OUT_RING(0);
 940         ADVANCE_LP_RING();
 941
 942         i810_wait_ring(dev, dev_priv->ring.Size - 8);
 943
 944         for (i = 0; i < dma->buf_count; i++) {
 945                 drm_buf_t *buf = dma->buflist[i];
 946                 drm_i810_buf_priv_t *buf_priv = buf->dev_private;
 947
 948                 int used = cmpxchg(buf_priv->in_use, I810_BUF_HARDWARE,
 949                                    I810_BUF_FREE);
 950
 951                 if (used == I810_BUF_HARDWARE)
 952                         DRM_DEBUG("reclaimed from HARDWARE\n");
 953                 if (used == I810_BUF_CLIENT)
 954                         DRM_DEBUG("still on client\n");
 955         }
 956
 957         return ret;
 958 }
 959
 960 /* Must be called with the lock held */
 961 void i810_reclaim_buffers(drm_device_t * dev, struct file *filp)
 962 {
 963         drm_device_dma_t *dma = dev->dma;
 964         int i;
 965
 966         if (!dma)
 967                 return;
 968         if (!dev->dev_private)
 969                 return;
 970         if (!dma->buflist)
 971                 return;
 972
 973         i810_flush_queue(dev);
 974
 975         for (i = 0; i < dma->buf_count; i++) {
 976                 drm_buf_t *buf = dma->buflist[i];
 977                 drm_i810_buf_priv_t *buf_priv = buf->dev_private;
 978
 979                 if (buf->filp == filp && buf_priv) {
 980                         int used = cmpxchg(buf_priv->in_use, I810_BUF_CLIENT,
 981                                            I810_BUF_FREE);
 982
 983                         if (used == I810_BUF_CLIENT)
 984                                 DRM_DEBUG("reclaimed from client\n");
 985                         if (buf_priv->currently_mapped == I810_BUF_MAPPED)
 986                                 buf_priv->currently_mapped = I810_BUF_UNMAPPED;
 987                 }
 988         }
 989 }
 990
 991 static int i810_flush_ioctl(struct inode *inode, struct file *filp,
 992                             unsigned int cmd, unsigned long arg)
 993 {
 994         drm_file_t *priv = filp->private_data;
 995         drm_device_t *dev = priv->head->dev;
 996
 997         LOCK_TEST_WITH_RETURN(dev, filp);
 998
 999         i810_flush_queue(dev);
1000         return 0;
1001 }
1002
1003 static int i810_dma_vertex(struct inode *inode, struct file *filp,
1004                            unsigned int cmd, unsigned long arg)
1005 {
1006         drm_file_t *priv = filp->private_data;
1007         drm_device_t *dev = priv->head->dev;
1008         drm_device_dma_t *dma = dev->dma;
1009         drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
1010         u32 *hw_status = dev_priv->hw_status_page;
1011         drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
1012             dev_priv->sarea_priv;
1013         drm_i810_vertex_t vertex;
1014
1015         if (copy_from_user
1016             (&vertex, (drm_i810_vertex_t __user *) arg, sizeof(vertex)))
1017                 return -EFAULT;
1018
1019         LOCK_TEST_WITH_RETURN(dev, filp);
1020
1021         DRM_DEBUG("i810 dma vertex, idx %d used %d discard %d\n",
1022                   vertex.idx, vertex.used, vertex.discard);
1023
1024         if (vertex.idx < 0 || vertex.idx > dma->buf_count)
1025                 return -EINVAL;
1026
1027         i810_dma_dispatch_vertex(dev,
1028                                  dma->buflist[vertex.idx],
1029                                  vertex.discard, vertex.used);
1030
1031         atomic_add(vertex.used, &dev->counts[_DRM_STAT_SECONDARY]);
1032         atomic_inc(&dev->counts[_DRM_STAT_DMA]);
1033         sarea_priv->last_enqueue = dev_priv->counter - 1;
1034         sarea_priv->last_dispatch = (int)hw_status[5];
1035
1036         return 0;
1037 }
1038
1039 static int i810_clear_bufs(struct inode *inode, struct file *filp,
1040                            unsigned int cmd, unsigned long arg)
1041 {
1042         drm_file_t *priv = filp->private_data;
1043         drm_device_t *dev = priv->head->dev;
1044         drm_i810_clear_t clear;
1045
1046         if (copy_from_user
1047             (&clear, (drm_i810_clear_t __user *) arg, sizeof(clear)))
1048                 return -EFAULT;
1049
1050         LOCK_TEST_WITH_RETURN(dev, filp);
1051
1052         /* GH: Someone's doing nasty things... */
1053         if (!dev->dev_private) {
1054                 return -EINVAL;
1055         }
1056
1057         i810_dma_dispatch_clear(dev, clear.flags,
1058                                 clear.clear_color, clear.clear_depth);
1059         return 0;
1060 }
1061
1062 static int i810_swap_bufs(struct inode *inode, struct file *filp,
1063                           unsigned int cmd, unsigned long arg)
1064 {
1065         drm_file_t *priv = filp->private_data;
1066         drm_device_t *dev = priv->head->dev;
1067
1068         DRM_DEBUG("i810_swap_bufs\n");
1069
1070         LOCK_TEST_WITH_RETURN(dev, filp);
1071
1072         i810_dma_dispatch_swap(dev);
1073         return 0;
1074 }
1075
1076 static int i810_getage(struct inode *inode, struct file *filp, unsigned int cmd,
1077                        unsigned long arg)
1078 {
1079         drm_file_t *priv = filp->private_data;
1080         drm_device_t *dev = priv->head->dev;
1081         drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
1082         u32 *hw_status = dev_priv->hw_status_page;
1083         drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
1084             dev_priv->sarea_priv;
1085
1086         sarea_priv->last_dispatch = (int)hw_status[5];
1087         return 0;
1088 }
1089
1090 static int i810_getbuf(struct inode *inode, struct file *filp, unsigned int cmd,
1091                        unsigned long arg)
1092 {
1093         drm_file_t *priv = filp->private_data;
1094         drm_device_t *dev = priv->head->dev;
1095         int retcode = 0;
1096         drm_i810_dma_t d;
1097         drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
1098         u32 *hw_status = dev_priv->hw_status_page;
1099         drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
1100             dev_priv->sarea_priv;
1101
1102         if (copy_from_user(&d, (drm_i810_dma_t __user *) arg, sizeof(d)))
1103                 return -EFAULT;
1104
1105         LOCK_TEST_WITH_RETURN(dev, filp);
1106
1107         d.granted = 0;
1108
1109         retcode = i810_dma_get_buffer(dev, &d, filp);
1110
1111         DRM_DEBUG("i810_dma: %d returning %d, granted = %d\n",
1112                   current->pid, retcode, d.granted);
1113
1114         if (copy_to_user((drm_dma_t __user *) arg, &d, sizeof(d)))
1115                 return -EFAULT;
1116         sarea_priv->last_dispatch = (int)hw_status[5];
1117
1118         return retcode;
1119 }
1120
1121 static int i810_copybuf(struct inode *inode,
1122                         struct file *filp, unsigned int cmd, unsigned long arg)
1123 {
1124         /* Never copy - 2.4.x doesn't need it */
1125         return 0;
1126 }
1127
1128 static int i810_docopy(struct inode *inode, struct file *filp, unsigned int cmd,
1129                        unsigned long arg)
1130 {
1131         /* Never copy - 2.4.x doesn't need it */
1132         return 0;
1133 }
1134
1135 static void i810_dma_dispatch_mc(drm_device_t * dev, drm_buf_t * buf, int used,
1136                                  unsigned int last_render)
1137 {
1138         drm_i810_private_t *dev_priv = dev->dev_private;
1139         drm_i810_buf_priv_t *buf_priv = buf->dev_private;
1140         drm_i810_sarea_t *sarea_priv = dev_priv->sarea_priv;
1141         unsigned long address = (unsigned long)buf->bus_address;
1142         unsigned long start = address - dev->agp->base;
1143         int u;
1144         RING_LOCALS;
1145
1146         i810_kernel_lost_context(dev);
1147
1148         u = cmpxchg(buf_priv->in_use, I810_BUF_CLIENT, I810_BUF_HARDWARE);
1149         if (u != I810_BUF_CLIENT) {
1150                 DRM_DEBUG("MC found buffer that isn't mine!\n");
1151         }
1152
1153         if (used > 4 * 1024)
1154                 used = 0;
1155
1156         sarea_priv->dirty = 0x7f;
1157
1158         DRM_DEBUG("dispatch mc addr 0x%lx, used 0x%x\n", address, used);
1159
1160         dev_priv->counter++;
1161         DRM_DEBUG("dispatch counter : %ld\n", dev_priv->counter);
1162         DRM_DEBUG("i810_dma_dispatch_mc\n");
1163         DRM_DEBUG("start : %lx\n", start);
1164         DRM_DEBUG("used : %d\n", used);
1165         DRM_DEBUG("start + used - 4 : %ld\n", start + used - 4);
1166
1167         if (buf_priv->currently_mapped == I810_BUF_MAPPED) {
1168                 if (used & 4) {
1169                         *(u32 *) ((u32) buf_priv->virtual + used) = 0;
1170                         used += 4;
1171                 }
1172
1173                 i810_unmap_buffer(buf);
1174         }
1175         BEGIN_LP_RING(4);
1176         OUT_RING(CMD_OP_BATCH_BUFFER);
1177         OUT_RING(start | BB1_PROTECTED);
1178         OUT_RING(start + used - 4);
1179         OUT_RING(0);
1180         ADVANCE_LP_RING();
1181
1182         BEGIN_LP_RING(8);
1183         OUT_RING(CMD_STORE_DWORD_IDX);
1184         OUT_RING(buf_priv->my_use_idx);
1185         OUT_RING(I810_BUF_FREE);
1186         OUT_RING(0);
1187
1188         OUT_RING(CMD_STORE_DWORD_IDX);
1189         OUT_RING(16);
1190         OUT_RING(last_render);
1191         OUT_RING(0);
1192         ADVANCE_LP_RING();
1193 }
1194
1195 static int i810_dma_mc(struct inode *inode, struct file *filp,
1196                        unsigned int cmd, unsigned long arg)
1197 {
1198         drm_file_t *priv = filp->private_data;
1199         drm_device_t *dev = priv->head->dev;
1200         drm_device_dma_t *dma = dev->dma;
1201         drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
1202         u32 *hw_status = dev_priv->hw_status_page;
1203         drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
1204             dev_priv->sarea_priv;
1205         drm_i810_mc_t mc;
1206
1207         if (copy_from_user(&mc, (drm_i810_mc_t __user *) arg, sizeof(mc)))
1208                 return -EFAULT;
1209
1210         LOCK_TEST_WITH_RETURN(dev, filp);
1211
1212         if (mc.idx >= dma->buf_count || mc.idx < 0)
1213                 return -EINVAL;
1214
1215         i810_dma_dispatch_mc(dev, dma->buflist[mc.idx], mc.used,
1216                              mc.last_render);
1217
1218         atomic_add(mc.used, &dev->counts[_DRM_STAT_SECONDARY]);
1219         atomic_inc(&dev->counts[_DRM_STAT_DMA]);
1220         sarea_priv->last_enqueue = dev_priv->counter - 1;
1221         sarea_priv->last_dispatch = (int)hw_status[5];
1222
1223         return 0;
1224 }
1225
1226 static int i810_rstatus(struct inode *inode, struct file *filp,
1227                         unsigned int cmd, unsigned long arg)
1228 {
1229         drm_file_t *priv = filp->private_data;
1230         drm_device_t *dev = priv->head->dev;
1231         drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
1232
1233         return (int)(((u32 *) (dev_priv->hw_status_page))[4]);
1234 }
1235
1236 static int i810_ov0_info(struct inode *inode, struct file *filp,
1237                          unsigned int cmd, unsigned long arg)
1238 {
1239         drm_file_t *priv = filp->private_data;
1240         drm_device_t *dev = priv->head->dev;
1241         drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
1242         drm_i810_overlay_t data;
1243
1244         data.offset = dev_priv->overlay_offset;
1245         data.physical = dev_priv->overlay_physical;
1246         if (copy_to_user
1247             ((drm_i810_overlay_t __user *) arg, &data, sizeof(data)))
1248                 return -EFAULT;
1249         return 0;
1250 }
1251
1252 static int i810_fstatus(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
1259         LOCK_TEST_WITH_RETURN(dev, filp);
1260
1261         return I810_READ(0x30008);
1262 }
1263
1264 static int i810_ov0_flip(struct inode *inode, struct file *filp,
1265                          unsigned int cmd, unsigned long arg)
1266 {
1267         drm_file_t *priv = filp->private_data;
1268         drm_device_t *dev = priv->head->dev;
1269         drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
1270
1271         LOCK_TEST_WITH_RETURN(dev, filp);
1272
1273         //Tell the overlay to update
1274         I810_WRITE(0x30000, dev_priv->overlay_physical | 0x80000000);
1275
1276         return 0;
1277 }
1278
1279 /* Not sure why this isn't set all the time:
1280  */
1281 static void i810_do_init_pageflip(drm_device_t * dev)
1282 {
1283         drm_i810_private_t *dev_priv = dev->dev_private;
1284
1285         DRM_DEBUG("%s\n", __FUNCTION__);
1286         dev_priv->page_flipping = 1;
1287         dev_priv->current_page = 0;
1288         dev_priv->sarea_priv->pf_current_page = dev_priv->current_page;
1289 }
1290
1291 static int i810_do_cleanup_pageflip(drm_device_t * dev)
1292 {
1293         drm_i810_private_t *dev_priv = dev->dev_private;
1294
1295         DRM_DEBUG("%s\n", __FUNCTION__);
1296         if (dev_priv->current_page != 0)
1297                 i810_dma_dispatch_flip(dev);
1298
1299         dev_priv->page_flipping = 0;
1300         return 0;
1301 }
1302
1303 static int i810_flip_bufs(struct inode *inode, struct file *filp,
1304                           unsigned int cmd, unsigned long arg)
1305 {
1306         drm_file_t *priv = filp->private_data;
1307         drm_device_t *dev = priv->head->dev;
1308         drm_i810_private_t *dev_priv = dev->dev_private;
1309
1310         DRM_DEBUG("%s\n", __FUNCTION__);
1311
1312         LOCK_TEST_WITH_RETURN(dev, filp);
1313
1314         if (!dev_priv->page_flipping)
1315                 i810_do_init_pageflip(dev);
1316
1317         i810_dma_dispatch_flip(dev);
1318         return 0;
1319 }
1320
1321 int i810_driver_load(drm_device_t *dev, unsigned long flags)
1322 {
1323         /* i810 has 4 more counters */
1324         dev->counters += 4;
1325         dev->types[6] = _DRM_STAT_IRQ;
1326         dev->types[7] = _DRM_STAT_PRIMARY;
1327         dev->types[8] = _DRM_STAT_SECONDARY;
1328         dev->types[9] = _DRM_STAT_DMA;
1329
1330         return 0;
1331 }
1332
1333 void i810_driver_lastclose(drm_device_t * dev)
1334 {
1335         i810_dma_cleanup(dev);
1336 }
1337
1338 void i810_driver_preclose(drm_device_t * dev, DRMFILE filp)
1339 {
1340         if (dev->dev_private) {
1341                 drm_i810_private_t *dev_priv = dev->dev_private;
1342                 if (dev_priv->page_flipping) {
1343                         i810_do_cleanup_pageflip(dev);
1344                 }
1345         }
1346 }
1347
1348 void i810_driver_reclaim_buffers_locked(drm_device_t * dev, struct file *filp)
1349 {
1350         i810_reclaim_buffers(dev, filp);
1351 }
1352
1353 int i810_driver_dma_quiescent(drm_device_t * dev)
1354 {
1355         i810_dma_quiescent(dev);
1356         return 0;
1357 }
1358
1359 drm_ioctl_desc_t i810_ioctls[] = {
1360         [DRM_IOCTL_NR(DRM_I810_INIT)] = {i810_dma_init, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
1361         [DRM_IOCTL_NR(DRM_I810_VERTEX)] = {i810_dma_vertex, DRM_AUTH},
1362         [DRM_IOCTL_NR(DRM_I810_CLEAR)] = {i810_clear_bufs, DRM_AUTH},
1363         [DRM_IOCTL_NR(DRM_I810_FLUSH)] = {i810_flush_ioctl, DRM_AUTH},
1364         [DRM_IOCTL_NR(DRM_I810_GETAGE)] = {i810_getage, DRM_AUTH},
1365         [DRM_IOCTL_NR(DRM_I810_GETBUF)] = {i810_getbuf, DRM_AUTH},
1366         [DRM_IOCTL_NR(DRM_I810_SWAP)] = {i810_swap_bufs, DRM_AUTH},
1367         [DRM_IOCTL_NR(DRM_I810_COPY)] = {i810_copybuf, DRM_AUTH},
1368         [DRM_IOCTL_NR(DRM_I810_DOCOPY)] = {i810_docopy, DRM_AUTH},
1369         [DRM_IOCTL_NR(DRM_I810_OV0INFO)] = {i810_ov0_info, DRM_AUTH},
1370         [DRM_IOCTL_NR(DRM_I810_FSTATUS)] = {i810_fstatus, DRM_AUTH},
1371         [DRM_IOCTL_NR(DRM_I810_OV0FLIP)] = {i810_ov0_flip, DRM_AUTH},
1372         [DRM_IOCTL_NR(DRM_I810_MC)] = {i810_dma_mc, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
1373         [DRM_IOCTL_NR(DRM_I810_RSTATUS)] = {i810_rstatus, DRM_AUTH},
1374         [DRM_IOCTL_NR(DRM_I810_FLIP)] = {i810_flip_bufs, DRM_AUTH}
1375 };
1376
1377 int i810_max_ioctl = DRM_ARRAY_SIZE(i810_ioctls);
1378
1379 /**
1380  * Determine if the device really is AGP or not.
1381  *
1382  * All Intel graphics chipsets are treated as AGP, even if they are really
1383  * PCI-e.
1384  *
1385  * \param dev   The device to be tested.
1386  *
1387  * \returns
1388  * A value of 1 is always retured to indictate every i810 is AGP.
1389  */
1390 int i810_driver_device_is_agp(drm_device_t * dev)
1391 {
1392         return 1;
1393 }