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 struct drm_buf *i810_freelist_get(struct drm_device * dev)
  49 {
  50         struct drm_device_dma *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                 struct drm_buf *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(struct drm_device * dev, struct drm_buf * 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         struct drm_file *priv = filp->private_data;
  91         struct drm_device *dev;
  92         drm_i810_private_t *dev_priv;
  93         struct drm_buf *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                                vma->vm_pgoff,
 110                                vma->vm_end - vma->vm_start, vma->vm_page_prot))
 111                 return -EAGAIN;
 112         return 0;
 113 }
 114
 115 static const 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(struct drm_buf * buf, struct file *filp)
 124 {
 125         struct drm_file *priv = filp->private_data;
 126         struct drm_device *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         const 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 (IS_ERR(buf_priv->virtual)) {
 145                 /* Real error */
 146                 DRM_ERROR("mmap error\n");
 147                 retcode = PTR_ERR(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(struct drm_buf * 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(struct drm_device * dev, drm_i810_dma_t * d,
 176                                struct file *filp)
 177 {
 178         struct drm_buf *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(struct drm_device * dev)
 206 {
 207         struct drm_device_dma *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_core_ioremapfree(&dev_priv->ring.map, dev);
 223                 }
 224                 if (dev_priv->hw_status_page) {
 225                         pci_free_consistent(dev->pdev, PAGE_SIZE,
 226                                             dev_priv->hw_status_page,
 227                                             dev_priv->dma_status_page);
 228                         /* Need to rewrite hardware status page */
 229                         I810_WRITE(0x02080, 0x1ffff000);
 230                 }
 231                 drm_free(dev->dev_private, sizeof(drm_i810_private_t),
 232                          DRM_MEM_DRIVER);
 233                 dev->dev_private = NULL;
 234
 235                 for (i = 0; i < dma->buf_count; i++) {
 236                         struct drm_buf *buf = dma->buflist[i];
 237                         drm_i810_buf_priv_t *buf_priv = buf->dev_private;
 238
 239                         if (buf_priv->kernel_virtual && buf->total)
 240                                 drm_core_ioremapfree(&buf_priv->map, dev);
 241                 }
 242         }
 243         return 0;
 244 }
 245
 246 static int i810_wait_ring(struct drm_device * dev, int n)
 247 {
 248         drm_i810_private_t *dev_priv = dev->dev_private;
 249         drm_i810_ring_buffer_t *ring = &(dev_priv->ring);
 250         int iters = 0;
 251         unsigned long end;
 252         unsigned int last_head = I810_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
 253
 254         end = jiffies + (HZ * 3);
 255         while (ring->space < n) {
 256                 ring->head = I810_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
 257                 ring->space = ring->head - (ring->tail + 8);
 258                 if (ring->space < 0)
 259                         ring->space += ring->Size;
 260
 261                 if (ring->head != last_head) {
 262                         end = jiffies + (HZ * 3);
 263                         last_head = ring->head;
 264                 }
 265
 266                 iters++;
 267                 if (time_before(end, jiffies)) {
 268                         DRM_ERROR("space: %d wanted %d\n", ring->space, n);
 269                         DRM_ERROR("lockup\n");
 270                         goto out_wait_ring;
 271                 }
 272                 udelay(1);
 273         }
 274
 275       out_wait_ring:
 276         return iters;
 277 }
 278
 279 static void i810_kernel_lost_context(struct drm_device * dev)
 280 {
 281         drm_i810_private_t *dev_priv = dev->dev_private;
 282         drm_i810_ring_buffer_t *ring = &(dev_priv->ring);
 283
 284         ring->head = I810_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
 285         ring->tail = I810_READ(LP_RING + RING_TAIL);
 286         ring->space = ring->head - (ring->tail + 8);
 287         if (ring->space < 0)
 288                 ring->space += ring->Size;
 289 }
 290
 291 static int i810_freelist_init(struct drm_device * dev, drm_i810_private_t * dev_priv)
 292 {
 293         struct drm_device_dma *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                 struct drm_buf *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->map.offset = buf->bus_address;
 314                 buf_priv->map.size = buf->total;
 315                 buf_priv->map.type = _DRM_AGP;
 316                 buf_priv->map.flags = 0;
 317                 buf_priv->map.mtrr = 0;
 318
 319                 drm_core_ioremap(&buf_priv->map, dev);
 320                 buf_priv->kernel_virtual = buf_priv->map.handle;
 321
 322         }
 323         return 0;
 324 }
 325
 326 static int i810_dma_initialize(struct drm_device * dev,
 327                                drm_i810_private_t * dev_priv,
 328                                drm_i810_init_t * init)
 329 {
 330         struct drm_map_list *r_list;
 331         memset(dev_priv, 0, sizeof(drm_i810_private_t));
 332
 333         list_for_each_entry(r_list, &dev->maplist, head) {
 334                 if (r_list->map &&
 335                     r_list->map->type == _DRM_SHM &&
 336                     r_list->map->flags & _DRM_CONTAINS_LOCK) {
 337                         dev_priv->sarea_map = r_list->map;
 338                         break;
 339                 }
 340         }
 341         if (!dev_priv->sarea_map) {
 342                 dev->dev_private = (void *)dev_priv;
 343                 i810_dma_cleanup(dev);
 344                 DRM_ERROR("can not find sarea!\n");
 345                 return -EINVAL;
 346         }
 347         dev_priv->mmio_map = drm_core_findmap(dev, init->mmio_offset);
 348         if (!dev_priv->mmio_map) {
 349                 dev->dev_private = (void *)dev_priv;
 350                 i810_dma_cleanup(dev);
 351                 DRM_ERROR("can not find mmio map!\n");
 352                 return -EINVAL;
 353         }
 354         dev->agp_buffer_token = init->buffers_offset;
 355         dev->agp_buffer_map = drm_core_findmap(dev, init->buffers_offset);
 356         if (!dev->agp_buffer_map) {
 357                 dev->dev_private = (void *)dev_priv;
 358                 i810_dma_cleanup(dev);
 359                 DRM_ERROR("can not find dma buffer map!\n");
 360                 return -EINVAL;
 361         }
 362
 363         dev_priv->sarea_priv = (drm_i810_sarea_t *)
 364             ((u8 *) dev_priv->sarea_map->handle + init->sarea_priv_offset);
 365
 366         dev_priv->ring.Start = init->ring_start;
 367         dev_priv->ring.End = init->ring_end;
 368         dev_priv->ring.Size = init->ring_size;
 369
 370         dev_priv->ring.map.offset = dev->agp->base + init->ring_start;
 371         dev_priv->ring.map.size = init->ring_size;
 372         dev_priv->ring.map.type = _DRM_AGP;
 373         dev_priv->ring.map.flags = 0;
 374         dev_priv->ring.map.mtrr = 0;
 375
 376         drm_core_ioremap(&dev_priv->ring.map, dev);
 377
 378         if (dev_priv->ring.map.handle == NULL) {
 379                 dev->dev_private = (void *)dev_priv;
 380                 i810_dma_cleanup(dev);
 381                 DRM_ERROR("can not ioremap virtual address for"
 382                           " ring buffer\n");
 383                 return DRM_ERR(ENOMEM);
 384         }
 385
 386         dev_priv->ring.virtual_start = dev_priv->ring.map.handle;
 387
 388         dev_priv->ring.tail_mask = dev_priv->ring.Size - 1;
 389
 390         dev_priv->w = init->w;
 391         dev_priv->h = init->h;
 392         dev_priv->pitch = init->pitch;
 393         dev_priv->back_offset = init->back_offset;
 394         dev_priv->depth_offset = init->depth_offset;
 395         dev_priv->front_offset = init->front_offset;
 396
 397         dev_priv->overlay_offset = init->overlay_offset;
 398         dev_priv->overlay_physical = init->overlay_physical;
 399
 400         dev_priv->front_di1 = init->front_offset | init->pitch_bits;
 401         dev_priv->back_di1 = init->back_offset | init->pitch_bits;
 402         dev_priv->zi1 = init->depth_offset | init->pitch_bits;
 403
 404         /* Program Hardware Status Page */
 405         dev_priv->hw_status_page =
 406             pci_alloc_consistent(dev->pdev, PAGE_SIZE,
 407                                  &dev_priv->dma_status_page);
 408         if (!dev_priv->hw_status_page) {
 409                 dev->dev_private = (void *)dev_priv;
 410                 i810_dma_cleanup(dev);
 411                 DRM_ERROR("Can not allocate hardware status page\n");
 412                 return -ENOMEM;
 413         }
 414         memset(dev_priv->hw_status_page, 0, PAGE_SIZE);
 415         DRM_DEBUG("hw status page @ %p\n", dev_priv->hw_status_page);
 416
 417         I810_WRITE(0x02080, dev_priv->dma_status_page);
 418         DRM_DEBUG("Enabled hardware status page\n");
 419
 420         /* Now we need to init our freelist */
 421         if (i810_freelist_init(dev, dev_priv) != 0) {
 422                 dev->dev_private = (void *)dev_priv;
 423                 i810_dma_cleanup(dev);
 424                 DRM_ERROR("Not enough space in the status page for"
 425                           " the freelist\n");
 426                 return -ENOMEM;
 427         }
 428         dev->dev_private = (void *)dev_priv;
 429
 430         return 0;
 431 }
 432
 433 /* i810 DRM version 1.1 used a smaller init structure with different
 434  * ordering of values than is currently used (drm >= 1.2). There is
 435  * no defined way to detect the XFree version to correct this problem,
 436  * however by checking using this procedure we can detect the correct
 437  * thing to do.
 438  *
 439  * #1 Read the Smaller init structure from user-space
 440  * #2 Verify the overlay_physical is a valid physical address, or NULL
 441  *    If it isn't then we have a v1.1 client. Fix up params.
 442  *    If it is, then we have a 1.2 client... get the rest of the data.
 443  */
 444 static int i810_dma_init_compat(drm_i810_init_t * init, unsigned long arg)
 445 {
 446
 447         /* Get v1.1 init data */
 448         if (copy_from_user(init, (drm_i810_pre12_init_t __user *) arg,
 449                            sizeof(drm_i810_pre12_init_t))) {
 450                 return -EFAULT;
 451         }
 452
 453         if ((!init->overlay_physical) || (init->overlay_physical > 4096)) {
 454
 455                 /* This is a v1.2 client, just get the v1.2 init data */
 456                 DRM_INFO("Using POST v1.2 init.\n");
 457                 if (copy_from_user(init, (drm_i810_init_t __user *) arg,
 458                                    sizeof(drm_i810_init_t))) {
 459                         return -EFAULT;
 460                 }
 461         } else {
 462
 463                 /* This is a v1.1 client, fix the params */
 464                 DRM_INFO("Using PRE v1.2 init.\n");
 465                 init->pitch_bits = init->h;
 466                 init->pitch = init->w;
 467                 init->h = init->overlay_physical;
 468                 init->w = init->overlay_offset;
 469                 init->overlay_physical = 0;
 470                 init->overlay_offset = 0;
 471         }
 472
 473         return 0;
 474 }
 475
 476 static int i810_dma_init(struct inode *inode, struct file *filp,
 477                          unsigned int cmd, unsigned long arg)
 478 {
 479         struct drm_file *priv = filp->private_data;
 480         struct drm_device *dev = priv->head->dev;
 481         drm_i810_private_t *dev_priv;
 482         drm_i810_init_t init;
 483         int retcode = 0;
 484
 485         /* Get only the init func */
 486         if (copy_from_user
 487             (&init, (void __user *)arg, sizeof(drm_i810_init_func_t)))
 488                 return -EFAULT;
 489
 490         switch (init.func) {
 491         case I810_INIT_DMA:
 492                 /* This case is for backward compatibility. It
 493                  * handles XFree 4.1.0 and 4.2.0, and has to
 494                  * do some parameter checking as described below.
 495                  * It will someday go away.
 496                  */
 497                 retcode = i810_dma_init_compat(&init, arg);
 498                 if (retcode)
 499                         return retcode;
 500
 501                 dev_priv = drm_alloc(sizeof(drm_i810_private_t),
 502                                      DRM_MEM_DRIVER);
 503                 if (dev_priv == NULL)
 504                         return -ENOMEM;
 505                 retcode = i810_dma_initialize(dev, dev_priv, &init);
 506                 break;
 507
 508         default:
 509         case I810_INIT_DMA_1_4:
 510                 DRM_INFO("Using v1.4 init.\n");
 511                 if (copy_from_user(&init, (drm_i810_init_t __user *) arg,
 512                                    sizeof(drm_i810_init_t))) {
 513                         return -EFAULT;
 514                 }
 515                 dev_priv = drm_alloc(sizeof(drm_i810_private_t),
 516                                      DRM_MEM_DRIVER);
 517                 if (dev_priv == NULL)
 518                         return -ENOMEM;
 519                 retcode = i810_dma_initialize(dev, dev_priv, &init);
 520                 break;
 521
 522         case I810_CLEANUP_DMA:
 523                 DRM_INFO("DMA Cleanup\n");
 524                 retcode = i810_dma_cleanup(dev);
 525                 break;
 526         }
 527
 528         return retcode;
 529 }
 530
 531 /* Most efficient way to verify state for the i810 is as it is
 532  * emitted.  Non-conformant state is silently dropped.
 533  *
 534  * Use 'volatile' & local var tmp to force the emitted values to be
 535  * identical to the verified ones.
 536  */
 537 static void i810EmitContextVerified(struct drm_device * dev,
 538                                     volatile unsigned int *code)
 539 {
 540         drm_i810_private_t *dev_priv = dev->dev_private;
 541         int i, j = 0;
 542         unsigned int tmp;
 543         RING_LOCALS;
 544
 545         BEGIN_LP_RING(I810_CTX_SETUP_SIZE);
 546
 547         OUT_RING(GFX_OP_COLOR_FACTOR);
 548         OUT_RING(code[I810_CTXREG_CF1]);
 549
 550         OUT_RING(GFX_OP_STIPPLE);
 551         OUT_RING(code[I810_CTXREG_ST1]);
 552
 553         for (i = 4; i < I810_CTX_SETUP_SIZE; i++) {
 554                 tmp = code[i];
 555
 556                 if ((tmp & (7 << 29)) == (3 << 29) &&
 557                     (tmp & (0x1f << 24)) < (0x1d << 24)) {
 558                         OUT_RING(tmp);
 559                         j++;
 560                 } else
 561                         printk("constext state dropped!!!\n");
 562         }
 563
 564         if (j & 1)
 565                 OUT_RING(0);
 566
 567         ADVANCE_LP_RING();
 568 }
 569
 570 static void i810EmitTexVerified(struct drm_device * dev, volatile unsigned int *code)
 571 {
 572         drm_i810_private_t *dev_priv = dev->dev_private;
 573         int i, j = 0;
 574         unsigned int tmp;
 575         RING_LOCALS;
 576
 577         BEGIN_LP_RING(I810_TEX_SETUP_SIZE);
 578
 579         OUT_RING(GFX_OP_MAP_INFO);
 580         OUT_RING(code[I810_TEXREG_MI1]);
 581         OUT_RING(code[I810_TEXREG_MI2]);
 582         OUT_RING(code[I810_TEXREG_MI3]);
 583
 584         for (i = 4; i < I810_TEX_SETUP_SIZE; i++) {
 585                 tmp = code[i];
 586
 587                 if ((tmp & (7 << 29)) == (3 << 29) &&
 588                     (tmp & (0x1f << 24)) < (0x1d << 24)) {
 589                         OUT_RING(tmp);
 590                         j++;
 591                 } else
 592                         printk("texture state dropped!!!\n");
 593         }
 594
 595         if (j & 1)
 596                 OUT_RING(0);
 597
 598         ADVANCE_LP_RING();
 599 }
 600
 601 /* Need to do some additional checking when setting the dest buffer.
 602  */
 603 static void i810EmitDestVerified(struct drm_device * dev,
 604                                  volatile unsigned int *code)
 605 {
 606         drm_i810_private_t *dev_priv = dev->dev_private;
 607         unsigned int tmp;
 608         RING_LOCALS;
 609
 610         BEGIN_LP_RING(I810_DEST_SETUP_SIZE + 2);
 611
 612         tmp = code[I810_DESTREG_DI1];
 613         if (tmp == dev_priv->front_di1 || tmp == dev_priv->back_di1) {
 614                 OUT_RING(CMD_OP_DESTBUFFER_INFO);
 615                 OUT_RING(tmp);
 616         } else
 617                 DRM_DEBUG("bad di1 %x (allow %x or %x)\n",
 618                           tmp, dev_priv->front_di1, dev_priv->back_di1);
 619
 620         /* invarient:
 621          */
 622         OUT_RING(CMD_OP_Z_BUFFER_INFO);
 623         OUT_RING(dev_priv->zi1);
 624
 625         OUT_RING(GFX_OP_DESTBUFFER_VARS);
 626         OUT_RING(code[I810_DESTREG_DV1]);
 627
 628         OUT_RING(GFX_OP_DRAWRECT_INFO);
 629         OUT_RING(code[I810_DESTREG_DR1]);
 630         OUT_RING(code[I810_DESTREG_DR2]);
 631         OUT_RING(code[I810_DESTREG_DR3]);
 632         OUT_RING(code[I810_DESTREG_DR4]);
 633         OUT_RING(0);
 634
 635         ADVANCE_LP_RING();
 636 }
 637
 638 static void i810EmitState(struct drm_device * dev)
 639 {
 640         drm_i810_private_t *dev_priv = dev->dev_private;
 641         drm_i810_sarea_t *sarea_priv = dev_priv->sarea_priv;
 642         unsigned int dirty = sarea_priv->dirty;
 643
 644         DRM_DEBUG("%s %x\n", __FUNCTION__, dirty);
 645
 646         if (dirty & I810_UPLOAD_BUFFERS) {
 647                 i810EmitDestVerified(dev, sarea_priv->BufferState);
 648                 sarea_priv->dirty &= ~I810_UPLOAD_BUFFERS;
 649         }
 650
 651         if (dirty & I810_UPLOAD_CTX) {
 652                 i810EmitContextVerified(dev, sarea_priv->ContextState);
 653                 sarea_priv->dirty &= ~I810_UPLOAD_CTX;
 654         }
 655
 656         if (dirty & I810_UPLOAD_TEX0) {
 657                 i810EmitTexVerified(dev, sarea_priv->TexState[0]);
 658                 sarea_priv->dirty &= ~I810_UPLOAD_TEX0;
 659         }
 660
 661         if (dirty & I810_UPLOAD_TEX1) {
 662                 i810EmitTexVerified(dev, sarea_priv->TexState[1]);
 663                 sarea_priv->dirty &= ~I810_UPLOAD_TEX1;
 664         }
 665 }
 666
 667 /* need to verify
 668  */
 669 static void i810_dma_dispatch_clear(struct drm_device * dev, int flags,
 670                                     unsigned int clear_color,
 671                                     unsigned int clear_zval)
 672 {
 673         drm_i810_private_t *dev_priv = dev->dev_private;
 674         drm_i810_sarea_t *sarea_priv = dev_priv->sarea_priv;
 675         int nbox = sarea_priv->nbox;
 676         struct drm_clip_rect *pbox = sarea_priv->boxes;
 677         int pitch = dev_priv->pitch;
 678         int cpp = 2;
 679         int i;
 680         RING_LOCALS;
 681
 682         if (dev_priv->current_page == 1) {
 683                 unsigned int tmp = flags;
 684
 685                 flags &= ~(I810_FRONT | I810_BACK);
 686                 if (tmp & I810_FRONT)
 687                         flags |= I810_BACK;
 688                 if (tmp & I810_BACK)
 689                         flags |= I810_FRONT;
 690         }
 691
 692         i810_kernel_lost_context(dev);
 693
 694         if (nbox > I810_NR_SAREA_CLIPRECTS)
 695                 nbox = I810_NR_SAREA_CLIPRECTS;
 696
 697         for (i = 0; i < nbox; i++, pbox++) {
 698                 unsigned int x = pbox->x1;
 699                 unsigned int y = pbox->y1;
 700                 unsigned int width = (pbox->x2 - x) * cpp;
 701                 unsigned int height = pbox->y2 - y;
 702                 unsigned int start = y * pitch + x * cpp;
 703
 704                 if (pbox->x1 > pbox->x2 ||
 705                     pbox->y1 > pbox->y2 ||
 706                     pbox->x2 > dev_priv->w || pbox->y2 > dev_priv->h)
 707                         continue;
 708
 709                 if (flags & I810_FRONT) {
 710                         BEGIN_LP_RING(6);
 711                         OUT_RING(BR00_BITBLT_CLIENT | BR00_OP_COLOR_BLT | 0x3);
 712                         OUT_RING(BR13_SOLID_PATTERN | (0xF0 << 16) | pitch);
 713                         OUT_RING((height << 16) | width);
 714                         OUT_RING(start);
 715                         OUT_RING(clear_color);
 716                         OUT_RING(0);
 717                         ADVANCE_LP_RING();
 718                 }
 719
 720                 if (flags & I810_BACK) {
 721                         BEGIN_LP_RING(6);
 722                         OUT_RING(BR00_BITBLT_CLIENT | 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 | BR00_OP_COLOR_BLT | 0x3);
 734                         OUT_RING(BR13_SOLID_PATTERN | (0xF0 << 16) | pitch);
 735                         OUT_RING((height << 16) | width);
 736                         OUT_RING(dev_priv->depth_offset + start);
 737                         OUT_RING(clear_zval);
 738                         OUT_RING(0);
 739                         ADVANCE_LP_RING();
 740                 }
 741         }
 742 }
 743
 744 static void i810_dma_dispatch_swap(struct drm_device * dev)
 745 {
 746         drm_i810_private_t *dev_priv = dev->dev_private;
 747         drm_i810_sarea_t *sarea_priv = dev_priv->sarea_priv;
 748         int nbox = sarea_priv->nbox;
 749         struct drm_clip_rect *pbox = sarea_priv->boxes;
 750         int pitch = dev_priv->pitch;
 751         int cpp = 2;
 752         int i;
 753         RING_LOCALS;
 754
 755         DRM_DEBUG("swapbuffers\n");
 756
 757         i810_kernel_lost_context(dev);
 758
 759         if (nbox > I810_NR_SAREA_CLIPRECTS)
 760                 nbox = I810_NR_SAREA_CLIPRECTS;
 761
 762         for (i = 0; i < nbox; i++, pbox++) {
 763                 unsigned int w = pbox->x2 - pbox->x1;
 764                 unsigned int h = pbox->y2 - pbox->y1;
 765                 unsigned int dst = pbox->x1 * cpp + pbox->y1 * pitch;
 766                 unsigned int start = dst;
 767
 768                 if (pbox->x1 > pbox->x2 ||
 769                     pbox->y1 > pbox->y2 ||
 770                     pbox->x2 > dev_priv->w || pbox->y2 > dev_priv->h)
 771                         continue;
 772
 773                 BEGIN_LP_RING(6);
 774                 OUT_RING(BR00_BITBLT_CLIENT | BR00_OP_SRC_COPY_BLT | 0x4);
 775                 OUT_RING(pitch | (0xCC << 16));
 776                 OUT_RING((h << 16) | (w * cpp));
 777                 if (dev_priv->current_page == 0)
 778                         OUT_RING(dev_priv->front_offset + start);
 779                 else
 780                         OUT_RING(dev_priv->back_offset + start);
 781                 OUT_RING(pitch);
 782                 if (dev_priv->current_page == 0)
 783                         OUT_RING(dev_priv->back_offset + start);
 784                 else
 785                         OUT_RING(dev_priv->front_offset + start);
 786                 ADVANCE_LP_RING();
 787         }
 788 }
 789
 790 static void i810_dma_dispatch_vertex(struct drm_device * dev,
 791                                      struct drm_buf * buf, int discard, int used)
 792 {
 793         drm_i810_private_t *dev_priv = dev->dev_private;
 794         drm_i810_buf_priv_t *buf_priv = buf->dev_private;
 795         drm_i810_sarea_t *sarea_priv = dev_priv->sarea_priv;
 796         struct drm_clip_rect *box = sarea_priv->boxes;
 797         int nbox = sarea_priv->nbox;
 798         unsigned long address = (unsigned long)buf->bus_address;
 799         unsigned long start = address - dev->agp->base;
 800         int i = 0;
 801         RING_LOCALS;
 802
 803         i810_kernel_lost_context(dev);
 804
 805         if (nbox > I810_NR_SAREA_CLIPRECTS)
 806                 nbox = I810_NR_SAREA_CLIPRECTS;
 807
 808         if (used > 4 * 1024)
 809                 used = 0;
 810
 811         if (sarea_priv->dirty)
 812                 i810EmitState(dev);
 813
 814         if (buf_priv->currently_mapped == I810_BUF_MAPPED) {
 815                 unsigned int prim = (sarea_priv->vertex_prim & PR_MASK);
 816
 817                 *(u32 *) buf_priv->kernel_virtual =
 818                     ((GFX_OP_PRIMITIVE | prim | ((used / 4) - 2)));
 819
 820                 if (used & 4) {
 821                         *(u32 *) ((char *) buf_priv->kernel_virtual + used) = 0;
 822                         used += 4;
 823                 }
 824
 825                 i810_unmap_buffer(buf);
 826         }
 827
 828         if (used) {
 829                 do {
 830                         if (i < nbox) {
 831                                 BEGIN_LP_RING(4);
 832                                 OUT_RING(GFX_OP_SCISSOR | SC_UPDATE_SCISSOR |
 833                                          SC_ENABLE);
 834                                 OUT_RING(GFX_OP_SCISSOR_INFO);
 835                                 OUT_RING(box[i].x1 | (box[i].y1 << 16));
 836                                 OUT_RING((box[i].x2 -
 837                                           1) | ((box[i].y2 - 1) << 16));
 838                                 ADVANCE_LP_RING();
 839                         }
 840
 841                         BEGIN_LP_RING(4);
 842                         OUT_RING(CMD_OP_BATCH_BUFFER);
 843                         OUT_RING(start | BB1_PROTECTED);
 844                         OUT_RING(start + used - 4);
 845                         OUT_RING(0);
 846                         ADVANCE_LP_RING();
 847
 848                 } while (++i < nbox);
 849         }
 850
 851         if (discard) {
 852                 dev_priv->counter++;
 853
 854                 (void)cmpxchg(buf_priv->in_use, I810_BUF_CLIENT,
 855                               I810_BUF_HARDWARE);
 856
 857                 BEGIN_LP_RING(8);
 858                 OUT_RING(CMD_STORE_DWORD_IDX);
 859                 OUT_RING(20);
 860                 OUT_RING(dev_priv->counter);
 861                 OUT_RING(CMD_STORE_DWORD_IDX);
 862                 OUT_RING(buf_priv->my_use_idx);
 863                 OUT_RING(I810_BUF_FREE);
 864                 OUT_RING(CMD_REPORT_HEAD);
 865                 OUT_RING(0);
 866                 ADVANCE_LP_RING();
 867         }
 868 }
 869
 870 static void i810_dma_dispatch_flip(struct drm_device * dev)
 871 {
 872         drm_i810_private_t *dev_priv = dev->dev_private;
 873         int pitch = dev_priv->pitch;
 874         RING_LOCALS;
 875
 876         DRM_DEBUG("%s: page=%d pfCurrentPage=%d\n",
 877                   __FUNCTION__,
 878                   dev_priv->current_page,
 879                   dev_priv->sarea_priv->pf_current_page);
 880
 881         i810_kernel_lost_context(dev);
 882
 883         BEGIN_LP_RING(2);
 884         OUT_RING(INST_PARSER_CLIENT | INST_OP_FLUSH | INST_FLUSH_MAP_CACHE);
 885         OUT_RING(0);
 886         ADVANCE_LP_RING();
 887
 888         BEGIN_LP_RING(I810_DEST_SETUP_SIZE + 2);
 889         /* On i815 at least ASYNC is buggy */
 890         /* pitch<<5 is from 11.2.8 p158,
 891            its the pitch / 8 then left shifted 8,
 892            so (pitch >> 3) << 8 */
 893         OUT_RING(CMD_OP_FRONTBUFFER_INFO | (pitch << 5) /*| ASYNC_FLIP */ );
 894         if (dev_priv->current_page == 0) {
 895                 OUT_RING(dev_priv->back_offset);
 896                 dev_priv->current_page = 1;
 897         } else {
 898                 OUT_RING(dev_priv->front_offset);
 899                 dev_priv->current_page = 0;
 900         }
 901         OUT_RING(0);
 902         ADVANCE_LP_RING();
 903
 904         BEGIN_LP_RING(2);
 905         OUT_RING(CMD_OP_WAIT_FOR_EVENT | WAIT_FOR_PLANE_A_FLIP);
 906         OUT_RING(0);
 907         ADVANCE_LP_RING();
 908
 909         /* Increment the frame counter.  The client-side 3D driver must
 910          * throttle the framerate by waiting for this value before
 911          * performing the swapbuffer ioctl.
 912          */
 913         dev_priv->sarea_priv->pf_current_page = dev_priv->current_page;
 914
 915 }
 916
 917 static void i810_dma_quiescent(struct drm_device * dev)
 918 {
 919         drm_i810_private_t *dev_priv = dev->dev_private;
 920         RING_LOCALS;
 921
 922 /*      printk("%s\n", __FUNCTION__); */
 923
 924         i810_kernel_lost_context(dev);
 925
 926         BEGIN_LP_RING(4);
 927         OUT_RING(INST_PARSER_CLIENT | INST_OP_FLUSH | INST_FLUSH_MAP_CACHE);
 928         OUT_RING(CMD_REPORT_HEAD);
 929         OUT_RING(0);
 930         OUT_RING(0);
 931         ADVANCE_LP_RING();
 932
 933         i810_wait_ring(dev, dev_priv->ring.Size - 8);
 934 }
 935
 936 static int i810_flush_queue(struct drm_device * dev)
 937 {
 938         drm_i810_private_t *dev_priv = dev->dev_private;
 939         struct drm_device_dma *dma = dev->dma;
 940         int i, ret = 0;
 941         RING_LOCALS;
 942
 943 /*      printk("%s\n", __FUNCTION__); */
 944
 945         i810_kernel_lost_context(dev);
 946
 947         BEGIN_LP_RING(2);
 948         OUT_RING(CMD_REPORT_HEAD);
 949         OUT_RING(0);
 950         ADVANCE_LP_RING();
 951
 952         i810_wait_ring(dev, dev_priv->ring.Size - 8);
 953
 954         for (i = 0; i < dma->buf_count; i++) {
 955                 struct drm_buf *buf = dma->buflist[i];
 956                 drm_i810_buf_priv_t *buf_priv = buf->dev_private;
 957
 958                 int used = cmpxchg(buf_priv->in_use, I810_BUF_HARDWARE,
 959                                    I810_BUF_FREE);
 960
 961                 if (used == I810_BUF_HARDWARE)
 962                         DRM_DEBUG("reclaimed from HARDWARE\n");
 963                 if (used == I810_BUF_CLIENT)
 964                         DRM_DEBUG("still on client\n");
 965         }
 966
 967         return ret;
 968 }
 969
 970 /* Must be called with the lock held */
 971 static void i810_reclaim_buffers(struct drm_device * dev, struct file *filp)
 972 {
 973         struct drm_device_dma *dma = dev->dma;
 974         int i;
 975
 976         if (!dma)
 977                 return;
 978         if (!dev->dev_private)
 979                 return;
 980         if (!dma->buflist)
 981                 return;
 982
 983         i810_flush_queue(dev);
 984
 985         for (i = 0; i < dma->buf_count; i++) {
 986                 struct drm_buf *buf = dma->buflist[i];
 987                 drm_i810_buf_priv_t *buf_priv = buf->dev_private;
 988
 989                 if (buf->filp == filp && buf_priv) {
 990                         int used = cmpxchg(buf_priv->in_use, I810_BUF_CLIENT,
 991                                            I810_BUF_FREE);
 992
 993                         if (used == I810_BUF_CLIENT)
 994                                 DRM_DEBUG("reclaimed from client\n");
 995                         if (buf_priv->currently_mapped == I810_BUF_MAPPED)
 996                                 buf_priv->currently_mapped = I810_BUF_UNMAPPED;
 997                 }
 998         }
 999 }
1000
1001 static int i810_flush_ioctl(struct inode *inode, struct file *filp,
1002                             unsigned int cmd, unsigned long arg)
1003 {
1004         struct drm_file *priv = filp->private_data;
1005         struct drm_device *dev = priv->head->dev;
1006
1007         LOCK_TEST_WITH_RETURN(dev, filp);
1008
1009         i810_flush_queue(dev);
1010         return 0;
1011 }
1012
1013 static int i810_dma_vertex(struct inode *inode, struct file *filp,
1014                            unsigned int cmd, unsigned long arg)
1015 {
1016         struct drm_file *priv = filp->private_data;
1017         struct drm_device *dev = priv->head->dev;
1018         struct drm_device_dma *dma = dev->dma;
1019         drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
1020         u32 *hw_status = dev_priv->hw_status_page;
1021         drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
1022             dev_priv->sarea_priv;
1023         drm_i810_vertex_t vertex;
1024
1025         if (copy_from_user
1026             (&vertex, (drm_i810_vertex_t __user *) arg, sizeof(vertex)))
1027                 return -EFAULT;
1028
1029         LOCK_TEST_WITH_RETURN(dev, filp);
1030
1031         DRM_DEBUG("i810 dma vertex, idx %d used %d discard %d\n",
1032                   vertex.idx, vertex.used, vertex.discard);
1033
1034         if (vertex.idx < 0 || vertex.idx > dma->buf_count)
1035                 return -EINVAL;
1036
1037         i810_dma_dispatch_vertex(dev,
1038                                  dma->buflist[vertex.idx],
1039                                  vertex.discard, vertex.used);
1040
1041         atomic_add(vertex.used, &dev->counts[_DRM_STAT_SECONDARY]);
1042         atomic_inc(&dev->counts[_DRM_STAT_DMA]);
1043         sarea_priv->last_enqueue = dev_priv->counter - 1;
1044         sarea_priv->last_dispatch = (int)hw_status[5];
1045
1046         return 0;
1047 }
1048
1049 static int i810_clear_bufs(struct inode *inode, struct file *filp,
1050                            unsigned int cmd, unsigned long arg)
1051 {
1052         struct drm_file *priv = filp->private_data;
1053         struct drm_device *dev = priv->head->dev;
1054         drm_i810_clear_t clear;
1055
1056         if (copy_from_user
1057             (&clear, (drm_i810_clear_t __user *) arg, sizeof(clear)))
1058                 return -EFAULT;
1059
1060         LOCK_TEST_WITH_RETURN(dev, filp);
1061
1062         /* GH: Someone's doing nasty things... */
1063         if (!dev->dev_private) {
1064                 return -EINVAL;
1065         }
1066
1067         i810_dma_dispatch_clear(dev, clear.flags,
1068                                 clear.clear_color, clear.clear_depth);
1069         return 0;
1070 }
1071
1072 static int i810_swap_bufs(struct inode *inode, struct file *filp,
1073                           unsigned int cmd, unsigned long arg)
1074 {
1075         struct drm_file *priv = filp->private_data;
1076         struct drm_device *dev = priv->head->dev;
1077
1078         DRM_DEBUG("i810_swap_bufs\n");
1079
1080         LOCK_TEST_WITH_RETURN(dev, filp);
1081
1082         i810_dma_dispatch_swap(dev);
1083         return 0;
1084 }
1085
1086 static int i810_getage(struct inode *inode, struct file *filp, unsigned int cmd,
1087                        unsigned long arg)
1088 {
1089         struct drm_file *priv = filp->private_data;
1090         struct drm_device *dev = priv->head->dev;
1091         drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
1092         u32 *hw_status = dev_priv->hw_status_page;
1093         drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
1094             dev_priv->sarea_priv;
1095
1096         sarea_priv->last_dispatch = (int)hw_status[5];
1097         return 0;
1098 }
1099
1100 static int i810_getbuf(struct inode *inode, struct file *filp, unsigned int cmd,
1101                        unsigned long arg)
1102 {
1103         struct drm_file *priv = filp->private_data;
1104         struct drm_device *dev = priv->head->dev;
1105         int retcode = 0;
1106         drm_i810_dma_t d;
1107         drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
1108         u32 *hw_status = dev_priv->hw_status_page;
1109         drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
1110             dev_priv->sarea_priv;
1111
1112         if (copy_from_user(&d, (drm_i810_dma_t __user *) arg, sizeof(d)))
1113                 return -EFAULT;
1114
1115         LOCK_TEST_WITH_RETURN(dev, filp);
1116
1117         d.granted = 0;
1118
1119         retcode = i810_dma_get_buffer(dev, &d, filp);
1120
1121         DRM_DEBUG("i810_dma: %d returning %d, granted = %d\n",
1122                   current->pid, retcode, d.granted);
1123
1124         if (copy_to_user((void __user *) arg, &d, sizeof(d)))
1125                 return -EFAULT;
1126         sarea_priv->last_dispatch = (int)hw_status[5];
1127
1128         return retcode;
1129 }
1130
1131 static int i810_copybuf(struct inode *inode,
1132                         struct file *filp, unsigned int cmd, unsigned long arg)
1133 {
1134         /* Never copy - 2.4.x doesn't need it */
1135         return 0;
1136 }
1137
1138 static int i810_docopy(struct inode *inode, struct file *filp, unsigned int cmd,
1139                        unsigned long arg)
1140 {
1141         /* Never copy - 2.4.x doesn't need it */
1142         return 0;
1143 }
1144
1145 static void i810_dma_dispatch_mc(struct drm_device * dev, struct drm_buf * buf, int used,
1146                                  unsigned int last_render)
1147 {
1148         drm_i810_private_t *dev_priv = dev->dev_private;
1149         drm_i810_buf_priv_t *buf_priv = buf->dev_private;
1150         drm_i810_sarea_t *sarea_priv = dev_priv->sarea_priv;
1151         unsigned long address = (unsigned long)buf->bus_address;
1152         unsigned long start = address - dev->agp->base;
1153         int u;
1154         RING_LOCALS;
1155
1156         i810_kernel_lost_context(dev);
1157
1158         u = cmpxchg(buf_priv->in_use, I810_BUF_CLIENT, I810_BUF_HARDWARE);
1159         if (u != I810_BUF_CLIENT) {
1160                 DRM_DEBUG("MC found buffer that isn't mine!\n");
1161         }
1162
1163         if (used > 4 * 1024)
1164                 used = 0;
1165
1166         sarea_priv->dirty = 0x7f;
1167
1168         DRM_DEBUG("dispatch mc addr 0x%lx, used 0x%x\n", address, used);
1169
1170         dev_priv->counter++;
1171         DRM_DEBUG("dispatch counter : %ld\n", dev_priv->counter);
1172         DRM_DEBUG("i810_dma_dispatch_mc\n");
1173         DRM_DEBUG("start : %lx\n", start);
1174         DRM_DEBUG("used : %d\n", used);
1175         DRM_DEBUG("start + used - 4 : %ld\n", start + used - 4);
1176
1177         if (buf_priv->currently_mapped == I810_BUF_MAPPED) {
1178                 if (used & 4) {
1179                         *(u32 *) ((char *) buf_priv->virtual + used) = 0;
1180                         used += 4;
1181                 }
1182
1183                 i810_unmap_buffer(buf);
1184         }
1185         BEGIN_LP_RING(4);
1186         OUT_RING(CMD_OP_BATCH_BUFFER);
1187         OUT_RING(start | BB1_PROTECTED);
1188         OUT_RING(start + used - 4);
1189         OUT_RING(0);
1190         ADVANCE_LP_RING();
1191
1192         BEGIN_LP_RING(8);
1193         OUT_RING(CMD_STORE_DWORD_IDX);
1194         OUT_RING(buf_priv->my_use_idx);
1195         OUT_RING(I810_BUF_FREE);
1196         OUT_RING(0);
1197
1198         OUT_RING(CMD_STORE_DWORD_IDX);
1199         OUT_RING(16);
1200         OUT_RING(last_render);
1201         OUT_RING(0);
1202         ADVANCE_LP_RING();
1203 }
1204
1205 static int i810_dma_mc(struct inode *inode, struct file *filp,
1206                        unsigned int cmd, unsigned long arg)
1207 {
1208         struct drm_file *priv = filp->private_data;
1209         struct drm_device *dev = priv->head->dev;
1210         struct drm_device_dma *dma = dev->dma;
1211         drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
1212         u32 *hw_status = dev_priv->hw_status_page;
1213         drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
1214             dev_priv->sarea_priv;
1215         drm_i810_mc_t mc;
1216
1217         if (copy_from_user(&mc, (drm_i810_mc_t __user *) arg, sizeof(mc)))
1218                 return -EFAULT;
1219
1220         LOCK_TEST_WITH_RETURN(dev, filp);
1221
1222         if (mc.idx >= dma->buf_count || mc.idx < 0)
1223                 return -EINVAL;
1224
1225         i810_dma_dispatch_mc(dev, dma->buflist[mc.idx], mc.used,
1226                              mc.last_render);
1227
1228         atomic_add(mc.used, &dev->counts[_DRM_STAT_SECONDARY]);
1229         atomic_inc(&dev->counts[_DRM_STAT_DMA]);
1230         sarea_priv->last_enqueue = dev_priv->counter - 1;
1231         sarea_priv->last_dispatch = (int)hw_status[5];
1232
1233         return 0;
1234 }
1235
1236 static int i810_rstatus(struct inode *inode, struct file *filp,
1237                         unsigned int cmd, unsigned long arg)
1238 {
1239         struct drm_file *priv = filp->private_data;
1240         struct drm_device *dev = priv->head->dev;
1241         drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
1242
1243         return (int)(((u32 *) (dev_priv->hw_status_page))[4]);
1244 }
1245
1246 static int i810_ov0_info(struct inode *inode, struct file *filp,
1247                          unsigned int cmd, unsigned long arg)
1248 {
1249         struct drm_file *priv = filp->private_data;
1250         struct drm_device *dev = priv->head->dev;
1251         drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
1252         drm_i810_overlay_t data;
1253
1254         data.offset = dev_priv->overlay_offset;
1255         data.physical = dev_priv->overlay_physical;
1256         if (copy_to_user
1257             ((drm_i810_overlay_t __user *) arg, &data, sizeof(data)))
1258                 return -EFAULT;
1259         return 0;
1260 }
1261
1262 static int i810_fstatus(struct inode *inode, struct file *filp,
1263                         unsigned int cmd, unsigned long arg)
1264 {
1265         struct drm_file *priv = filp->private_data;
1266         struct drm_device *dev = priv->head->dev;
1267         drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
1268
1269         LOCK_TEST_WITH_RETURN(dev, filp);
1270
1271         return I810_READ(0x30008);
1272 }
1273
1274 static int i810_ov0_flip(struct inode *inode, struct file *filp,
1275                          unsigned int cmd, unsigned long arg)
1276 {
1277         struct drm_file *priv = filp->private_data;
1278         struct drm_device *dev = priv->head->dev;
1279         drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
1280
1281         LOCK_TEST_WITH_RETURN(dev, filp);
1282
1283         //Tell the overlay to update
1284         I810_WRITE(0x30000, dev_priv->overlay_physical | 0x80000000);
1285
1286         return 0;
1287 }
1288
1289 /* Not sure why this isn't set all the time:
1290  */
1291 static void i810_do_init_pageflip(struct drm_device * dev)
1292 {
1293         drm_i810_private_t *dev_priv = dev->dev_private;
1294
1295         DRM_DEBUG("%s\n", __FUNCTION__);
1296         dev_priv->page_flipping = 1;
1297         dev_priv->current_page = 0;
1298         dev_priv->sarea_priv->pf_current_page = dev_priv->current_page;
1299 }
1300
1301 static int i810_do_cleanup_pageflip(struct drm_device * dev)
1302 {
1303         drm_i810_private_t *dev_priv = dev->dev_private;
1304
1305         DRM_DEBUG("%s\n", __FUNCTION__);
1306         if (dev_priv->current_page != 0)
1307                 i810_dma_dispatch_flip(dev);
1308
1309         dev_priv->page_flipping = 0;
1310         return 0;
1311 }
1312
1313 static int i810_flip_bufs(struct inode *inode, struct file *filp,
1314                           unsigned int cmd, unsigned long arg)
1315 {
1316         struct drm_file *priv = filp->private_data;
1317         struct drm_device *dev = priv->head->dev;
1318         drm_i810_private_t *dev_priv = dev->dev_private;
1319
1320         DRM_DEBUG("%s\n", __FUNCTION__);
1321
1322         LOCK_TEST_WITH_RETURN(dev, filp);
1323
1324         if (!dev_priv->page_flipping)
1325                 i810_do_init_pageflip(dev);
1326
1327         i810_dma_dispatch_flip(dev);
1328         return 0;
1329 }
1330
1331 int i810_driver_load(struct drm_device *dev, unsigned long flags)
1332 {
1333         /* i810 has 4 more counters */
1334         dev->counters += 4;
1335         dev->types[6] = _DRM_STAT_IRQ;
1336         dev->types[7] = _DRM_STAT_PRIMARY;
1337         dev->types[8] = _DRM_STAT_SECONDARY;
1338         dev->types[9] = _DRM_STAT_DMA;
1339
1340         return 0;
1341 }
1342
1343 void i810_driver_lastclose(struct drm_device * dev)
1344 {
1345         i810_dma_cleanup(dev);
1346 }
1347
1348 void i810_driver_preclose(struct drm_device * dev, DRMFILE filp)
1349 {
1350         if (dev->dev_private) {
1351                 drm_i810_private_t *dev_priv = dev->dev_private;
1352                 if (dev_priv->page_flipping) {
1353                         i810_do_cleanup_pageflip(dev);
1354                 }
1355         }
1356 }
1357
1358 void i810_driver_reclaim_buffers_locked(struct drm_device * dev, struct file *filp)
1359 {
1360         i810_reclaim_buffers(dev, filp);
1361 }
1362
1363 int i810_driver_dma_quiescent(struct drm_device * dev)
1364 {
1365         i810_dma_quiescent(dev);
1366         return 0;
1367 }
1368
1369 drm_ioctl_desc_t i810_ioctls[] = {
1370         [DRM_IOCTL_NR(DRM_I810_INIT)] = {i810_dma_init, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
1371         [DRM_IOCTL_NR(DRM_I810_VERTEX)] = {i810_dma_vertex, DRM_AUTH},
1372         [DRM_IOCTL_NR(DRM_I810_CLEAR)] = {i810_clear_bufs, DRM_AUTH},
1373         [DRM_IOCTL_NR(DRM_I810_FLUSH)] = {i810_flush_ioctl, DRM_AUTH},
1374         [DRM_IOCTL_NR(DRM_I810_GETAGE)] = {i810_getage, DRM_AUTH},
1375         [DRM_IOCTL_NR(DRM_I810_GETBUF)] = {i810_getbuf, DRM_AUTH},
1376         [DRM_IOCTL_NR(DRM_I810_SWAP)] = {i810_swap_bufs, DRM_AUTH},
1377         [DRM_IOCTL_NR(DRM_I810_COPY)] = {i810_copybuf, DRM_AUTH},
1378         [DRM_IOCTL_NR(DRM_I810_DOCOPY)] = {i810_docopy, DRM_AUTH},
1379         [DRM_IOCTL_NR(DRM_I810_OV0INFO)] = {i810_ov0_info, DRM_AUTH},
1380         [DRM_IOCTL_NR(DRM_I810_FSTATUS)] = {i810_fstatus, DRM_AUTH},
1381         [DRM_IOCTL_NR(DRM_I810_OV0FLIP)] = {i810_ov0_flip, DRM_AUTH},
1382         [DRM_IOCTL_NR(DRM_I810_MC)] = {i810_dma_mc, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
1383         [DRM_IOCTL_NR(DRM_I810_RSTATUS)] = {i810_rstatus, DRM_AUTH},
1384         [DRM_IOCTL_NR(DRM_I810_FLIP)] = {i810_flip_bufs, DRM_AUTH}
1385 };
1386
1387 int i810_max_ioctl = DRM_ARRAY_SIZE(i810_ioctls);
1388
1389 /**
1390  * Determine if the device really is AGP or not.
1391  *
1392  * All Intel graphics chipsets are treated as AGP, even if they are really
1393  * PCI-e.
1394  *
1395  * \param dev   The device to be tested.
1396  *
1397  * \returns
1398  * A value of 1 is always retured to indictate every i810 is AGP.
1399  */
1400 int i810_driver_device_is_agp(struct drm_device * dev)
1401 {
1402         return 1;
1403 }