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 drm_file *file_priv)
 124 {
 125         struct drm_device *dev = file_priv->head->dev;
 126         drm_i810_buf_priv_t *buf_priv = buf->dev_private;
 127         drm_i810_private_t *dev_priv = dev->dev_private;
 128         const struct file_operations *old_fops;
 129         int retcode = 0;
 130
 131         if (buf_priv->currently_mapped == I810_BUF_MAPPED)
 132                 return -EINVAL;
 133
 134         down_write(&current->mm->mmap_sem);
 135         old_fops = file_priv->filp->f_op;
 136         file_priv->filp->f_op = &i810_buffer_fops;
 137         dev_priv->mmap_buffer = buf;
 138         buf_priv->virtual = (void *)do_mmap(file_priv->filp, 0, buf->total,
 139                                             PROT_READ | PROT_WRITE,
 140                                             MAP_SHARED, buf->bus_address);
 141         dev_priv->mmap_buffer = NULL;
 142         file_priv->filp->f_op = old_fops;
 143         if (IS_ERR(buf_priv->virtual)) {
 144                 /* Real error */
 145                 DRM_ERROR("mmap error\n");
 146                 retcode = PTR_ERR(buf_priv->virtual);
 147                 buf_priv->virtual = NULL;
 148         }
 149         up_write(&current->mm->mmap_sem);
 150
 151         return retcode;
 152 }
 153
 154 static int i810_unmap_buffer(struct drm_buf * buf)
 155 {
 156         drm_i810_buf_priv_t *buf_priv = buf->dev_private;
 157         int retcode = 0;
 158
 159         if (buf_priv->currently_mapped != I810_BUF_MAPPED)
 160                 return -EINVAL;
 161
 162         down_write(&current->mm->mmap_sem);
 163         retcode = do_munmap(current->mm,
 164                             (unsigned long)buf_priv->virtual,
 165                             (size_t) buf->total);
 166         up_write(&current->mm->mmap_sem);
 167
 168         buf_priv->currently_mapped = I810_BUF_UNMAPPED;
 169         buf_priv->virtual = NULL;
 170
 171         return retcode;
 172 }
 173
 174 static int i810_dma_get_buffer(struct drm_device * dev, drm_i810_dma_t * d,
 175                                struct drm_file *file_priv)
 176 {
 177         struct drm_buf *buf;
 178         drm_i810_buf_priv_t *buf_priv;
 179         int retcode = 0;
 180
 181         buf = i810_freelist_get(dev);
 182         if (!buf) {
 183                 retcode = -ENOMEM;
 184                 DRM_DEBUG("retcode=%d\n", retcode);
 185                 return retcode;
 186         }
 187
 188         retcode = i810_map_buffer(buf, file_priv);
 189         if (retcode) {
 190                 i810_freelist_put(dev, buf);
 191                 DRM_ERROR("mapbuf failed, retcode %d\n", retcode);
 192                 return retcode;
 193         }
 194         buf->file_priv = file_priv;
 195         buf_priv = buf->dev_private;
 196         d->granted = 1;
 197         d->request_idx = buf->idx;
 198         d->request_size = buf->total;
 199         d->virtual = buf_priv->virtual;
 200
 201         return retcode;
 202 }
 203
 204 static int i810_dma_cleanup(struct drm_device * dev)
 205 {
 206         struct drm_device_dma *dma = dev->dma;
 207
 208         /* Make sure interrupts are disabled here because the uninstall ioctl
 209          * may not have been called from userspace and after dev_private
 210          * is freed, it's too late.
 211          */
 212         if (drm_core_check_feature(dev, DRIVER_HAVE_IRQ) && dev->irq_enabled)
 213                 drm_irq_uninstall(dev);
 214
 215         if (dev->dev_private) {
 216                 int i;
 217                 drm_i810_private_t *dev_priv =
 218                     (drm_i810_private_t *) dev->dev_private;
 219
 220                 if (dev_priv->ring.virtual_start) {
 221                         drm_core_ioremapfree(&dev_priv->ring.map, dev);
 222                 }
 223                 if (dev_priv->hw_status_page) {
 224                         pci_free_consistent(dev->pdev, PAGE_SIZE,
 225                                             dev_priv->hw_status_page,
 226                                             dev_priv->dma_status_page);
 227                         /* Need to rewrite hardware status page */
 228                         I810_WRITE(0x02080, 0x1ffff000);
 229                 }
 230                 drm_free(dev->dev_private, sizeof(drm_i810_private_t),
 231                          DRM_MEM_DRIVER);
 232                 dev->dev_private = NULL;
 233
 234                 for (i = 0; i < dma->buf_count; i++) {
 235                         struct drm_buf *buf = dma->buflist[i];
 236                         drm_i810_buf_priv_t *buf_priv = buf->dev_private;
 237
 238                         if (buf_priv->kernel_virtual && buf->total)
 239                                 drm_core_ioremapfree(&buf_priv->map, dev);
 240                 }
 241         }
 242         return 0;
 243 }
 244
 245 static int i810_wait_ring(struct drm_device * dev, int n)
 246 {
 247         drm_i810_private_t *dev_priv = dev->dev_private;
 248         drm_i810_ring_buffer_t *ring = &(dev_priv->ring);
 249         int iters = 0;
 250         unsigned long end;
 251         unsigned int last_head = I810_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
 252
 253         end = jiffies + (HZ * 3);
 254         while (ring->space < n) {
 255                 ring->head = I810_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
 256                 ring->space = ring->head - (ring->tail + 8);
 257                 if (ring->space < 0)
 258                         ring->space += ring->Size;
 259
 260                 if (ring->head != last_head) {
 261                         end = jiffies + (HZ * 3);
 262                         last_head = ring->head;
 263                 }
 264
 265                 iters++;
 266                 if (time_before(end, jiffies)) {
 267                         DRM_ERROR("space: %d wanted %d\n", ring->space, n);
 268                         DRM_ERROR("lockup\n");
 269                         goto out_wait_ring;
 270                 }
 271                 udelay(1);
 272         }
 273
 274       out_wait_ring:
 275         return iters;
 276 }
 277
 278 static void i810_kernel_lost_context(struct drm_device * dev)
 279 {
 280         drm_i810_private_t *dev_priv = dev->dev_private;
 281         drm_i810_ring_buffer_t *ring = &(dev_priv->ring);
 282
 283         ring->head = I810_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
 284         ring->tail = I810_READ(LP_RING + RING_TAIL);
 285         ring->space = ring->head - (ring->tail + 8);
 286         if (ring->space < 0)
 287                 ring->space += ring->Size;
 288 }
 289
 290 static int i810_freelist_init(struct drm_device * dev, drm_i810_private_t * dev_priv)
 291 {
 292         struct drm_device_dma *dma = dev->dma;
 293         int my_idx = 24;
 294         u32 *hw_status = (u32 *) (dev_priv->hw_status_page + my_idx);
 295         int i;
 296
 297         if (dma->buf_count > 1019) {
 298                 /* Not enough space in the status page for the freelist */
 299                 return -EINVAL;
 300         }
 301
 302         for (i = 0; i < dma->buf_count; i++) {
 303                 struct drm_buf *buf = dma->buflist[i];
 304                 drm_i810_buf_priv_t *buf_priv = buf->dev_private;
 305
 306                 buf_priv->in_use = hw_status++;
 307                 buf_priv->my_use_idx = my_idx;
 308                 my_idx += 4;
 309
 310                 *buf_priv->in_use = I810_BUF_FREE;
 311
 312                 buf_priv->map.offset = buf->bus_address;
 313                 buf_priv->map.size = buf->total;
 314                 buf_priv->map.type = _DRM_AGP;
 315                 buf_priv->map.flags = 0;
 316                 buf_priv->map.mtrr = 0;
 317
 318                 drm_core_ioremap(&buf_priv->map, dev);
 319                 buf_priv->kernel_virtual = buf_priv->map.handle;
 320
 321         }
 322         return 0;
 323 }
 324
 325 static int i810_dma_initialize(struct drm_device * dev,
 326                                drm_i810_private_t * dev_priv,
 327                                drm_i810_init_t * init)
 328 {
 329         struct drm_map_list *r_list;
 330         memset(dev_priv, 0, sizeof(drm_i810_private_t));
 331
 332         list_for_each_entry(r_list, &dev->maplist, head) {
 333                 if (r_list->map &&
 334                     r_list->map->type == _DRM_SHM &&
 335                     r_list->map->flags & _DRM_CONTAINS_LOCK) {
 336                         dev_priv->sarea_map = r_list->map;
 337                         break;
 338                 }
 339         }
 340         if (!dev_priv->sarea_map) {
 341                 dev->dev_private = (void *)dev_priv;
 342                 i810_dma_cleanup(dev);
 343                 DRM_ERROR("can not find sarea!\n");
 344                 return -EINVAL;
 345         }
 346         dev_priv->mmio_map = drm_core_findmap(dev, init->mmio_offset);
 347         if (!dev_priv->mmio_map) {
 348                 dev->dev_private = (void *)dev_priv;
 349                 i810_dma_cleanup(dev);
 350                 DRM_ERROR("can not find mmio map!\n");
 351                 return -EINVAL;
 352         }
 353         dev->agp_buffer_token = init->buffers_offset;
 354         dev->agp_buffer_map = drm_core_findmap(dev, init->buffers_offset);
 355         if (!dev->agp_buffer_map) {
 356                 dev->dev_private = (void *)dev_priv;
 357                 i810_dma_cleanup(dev);
 358                 DRM_ERROR("can not find dma buffer map!\n");
 359                 return -EINVAL;
 360         }
 361
 362         dev_priv->sarea_priv = (drm_i810_sarea_t *)
 363             ((u8 *) dev_priv->sarea_map->handle + init->sarea_priv_offset);
 364
 365         dev_priv->ring.Start = init->ring_start;
 366         dev_priv->ring.End = init->ring_end;
 367         dev_priv->ring.Size = init->ring_size;
 368
 369         dev_priv->ring.map.offset = dev->agp->base + init->ring_start;
 370         dev_priv->ring.map.size = init->ring_size;
 371         dev_priv->ring.map.type = _DRM_AGP;
 372         dev_priv->ring.map.flags = 0;
 373         dev_priv->ring.map.mtrr = 0;
 374
 375         drm_core_ioremap(&dev_priv->ring.map, dev);
 376
 377         if (dev_priv->ring.map.handle == NULL) {
 378                 dev->dev_private = (void *)dev_priv;
 379                 i810_dma_cleanup(dev);
 380                 DRM_ERROR("can not ioremap virtual address for"
 381                           " ring buffer\n");
 382                 return -ENOMEM;
 383         }
 384
 385         dev_priv->ring.virtual_start = dev_priv->ring.map.handle;
 386
 387         dev_priv->ring.tail_mask = dev_priv->ring.Size - 1;
 388
 389         dev_priv->w = init->w;
 390         dev_priv->h = init->h;
 391         dev_priv->pitch = init->pitch;
 392         dev_priv->back_offset = init->back_offset;
 393         dev_priv->depth_offset = init->depth_offset;
 394         dev_priv->front_offset = init->front_offset;
 395
 396         dev_priv->overlay_offset = init->overlay_offset;
 397         dev_priv->overlay_physical = init->overlay_physical;
 398
 399         dev_priv->front_di1 = init->front_offset | init->pitch_bits;
 400         dev_priv->back_di1 = init->back_offset | init->pitch_bits;
 401         dev_priv->zi1 = init->depth_offset | init->pitch_bits;
 402
 403         /* Program Hardware Status Page */
 404         dev_priv->hw_status_page =
 405             pci_alloc_consistent(dev->pdev, PAGE_SIZE,
 406                                  &dev_priv->dma_status_page);
 407         if (!dev_priv->hw_status_page) {
 408                 dev->dev_private = (void *)dev_priv;
 409                 i810_dma_cleanup(dev);
 410                 DRM_ERROR("Can not allocate hardware status page\n");
 411                 return -ENOMEM;
 412         }
 413         memset(dev_priv->hw_status_page, 0, PAGE_SIZE);
 414         DRM_DEBUG("hw status page @ %p\n", dev_priv->hw_status_page);
 415
 416         I810_WRITE(0x02080, dev_priv->dma_status_page);
 417         DRM_DEBUG("Enabled hardware status page\n");
 418
 419         /* Now we need to init our freelist */
 420         if (i810_freelist_init(dev, dev_priv) != 0) {
 421                 dev->dev_private = (void *)dev_priv;
 422                 i810_dma_cleanup(dev);
 423                 DRM_ERROR("Not enough space in the status page for"
 424                           " the freelist\n");
 425                 return -ENOMEM;
 426         }
 427         dev->dev_private = (void *)dev_priv;
 428
 429         return 0;
 430 }
 431
 432 /* i810 DRM version 1.1 used a smaller init structure with different
 433  * ordering of values than is currently used (drm >= 1.2). There is
 434  * no defined way to detect the XFree version to correct this problem,
 435  * however by checking using this procedure we can detect the correct
 436  * thing to do.
 437  *
 438  * #1 Read the Smaller init structure from user-space
 439  * #2 Verify the overlay_physical is a valid physical address, or NULL
 440  *    If it isn't then we have a v1.1 client. Fix up params.
 441  *    If it is, then we have a 1.2 client... get the rest of the data.
 442  */
 443 static int i810_dma_init_compat(drm_i810_init_t * init, unsigned long arg)
 444 {
 445
 446         /* Get v1.1 init data */
 447         if (copy_from_user(init, (drm_i810_pre12_init_t __user *) arg,
 448                            sizeof(drm_i810_pre12_init_t))) {
 449                 return -EFAULT;
 450         }
 451
 452         if ((!init->overlay_physical) || (init->overlay_physical > 4096)) {
 453
 454                 /* This is a v1.2 client, just get the v1.2 init data */
 455                 DRM_INFO("Using POST v1.2 init.\n");
 456                 if (copy_from_user(init, (drm_i810_init_t __user *) arg,
 457                                    sizeof(drm_i810_init_t))) {
 458                         return -EFAULT;
 459                 }
 460         } else {
 461
 462                 /* This is a v1.1 client, fix the params */
 463                 DRM_INFO("Using PRE v1.2 init.\n");
 464                 init->pitch_bits = init->h;
 465                 init->pitch = init->w;
 466                 init->h = init->overlay_physical;
 467                 init->w = init->overlay_offset;
 468                 init->overlay_physical = 0;
 469                 init->overlay_offset = 0;
 470         }
 471
 472         return 0;
 473 }
 474
 475 static int i810_dma_init(struct inode *inode, struct drm_file *file_priv,
 476                          unsigned int cmd, unsigned long arg)
 477 {
 478         struct drm_device *dev = file_priv->head->dev;
 479         drm_i810_private_t *dev_priv;
 480         drm_i810_init_t init;
 481         int retcode = 0;
 482
 483         /* Get only the init func */
 484         if (copy_from_user
 485             (&init, (void __user *)arg, sizeof(drm_i810_init_func_t)))
 486                 return -EFAULT;
 487
 488         switch (init.func) {
 489         case I810_INIT_DMA:
 490                 /* This case is for backward compatibility. It
 491                  * handles XFree 4.1.0 and 4.2.0, and has to
 492                  * do some parameter checking as described below.
 493                  * It will someday go away.
 494                  */
 495                 retcode = i810_dma_init_compat(&init, arg);
 496                 if (retcode)
 497                         return retcode;
 498
 499                 dev_priv = drm_alloc(sizeof(drm_i810_private_t),
 500                                      DRM_MEM_DRIVER);
 501                 if (dev_priv == NULL)
 502                         return -ENOMEM;
 503                 retcode = i810_dma_initialize(dev, dev_priv, &init);
 504                 break;
 505
 506         default:
 507         case I810_INIT_DMA_1_4:
 508                 DRM_INFO("Using v1.4 init.\n");
 509                 if (copy_from_user(&init, (drm_i810_init_t __user *) arg,
 510                                    sizeof(drm_i810_init_t))) {
 511                         return -EFAULT;
 512                 }
 513                 dev_priv = drm_alloc(sizeof(drm_i810_private_t),
 514                                      DRM_MEM_DRIVER);
 515                 if (dev_priv == NULL)
 516                         return -ENOMEM;
 517                 retcode = i810_dma_initialize(dev, dev_priv, &init);
 518                 break;
 519
 520         case I810_CLEANUP_DMA:
 521                 DRM_INFO("DMA Cleanup\n");
 522                 retcode = i810_dma_cleanup(dev);
 523                 break;
 524         }
 525
 526         return retcode;
 527 }
 528
 529 /* Most efficient way to verify state for the i810 is as it is
 530  * emitted.  Non-conformant state is silently dropped.
 531  *
 532  * Use 'volatile' & local var tmp to force the emitted values to be
 533  * identical to the verified ones.
 534  */
 535 static void i810EmitContextVerified(struct drm_device * dev,
 536                                     volatile unsigned int *code)
 537 {
 538         drm_i810_private_t *dev_priv = dev->dev_private;
 539         int i, j = 0;
 540         unsigned int tmp;
 541         RING_LOCALS;
 542
 543         BEGIN_LP_RING(I810_CTX_SETUP_SIZE);
 544
 545         OUT_RING(GFX_OP_COLOR_FACTOR);
 546         OUT_RING(code[I810_CTXREG_CF1]);
 547
 548         OUT_RING(GFX_OP_STIPPLE);
 549         OUT_RING(code[I810_CTXREG_ST1]);
 550
 551         for (i = 4; i < I810_CTX_SETUP_SIZE; i++) {
 552                 tmp = code[i];
 553
 554                 if ((tmp & (7 << 29)) == (3 << 29) &&
 555                     (tmp & (0x1f << 24)) < (0x1d << 24)) {
 556                         OUT_RING(tmp);
 557                         j++;
 558                 } else
 559                         printk("constext state dropped!!!\n");
 560         }
 561
 562         if (j & 1)
 563                 OUT_RING(0);
 564
 565         ADVANCE_LP_RING();
 566 }
 567
 568 static void i810EmitTexVerified(struct drm_device * dev, volatile unsigned int *code)
 569 {
 570         drm_i810_private_t *dev_priv = dev->dev_private;
 571         int i, j = 0;
 572         unsigned int tmp;
 573         RING_LOCALS;
 574
 575         BEGIN_LP_RING(I810_TEX_SETUP_SIZE);
 576
 577         OUT_RING(GFX_OP_MAP_INFO);
 578         OUT_RING(code[I810_TEXREG_MI1]);
 579         OUT_RING(code[I810_TEXREG_MI2]);
 580         OUT_RING(code[I810_TEXREG_MI3]);
 581
 582         for (i = 4; i < I810_TEX_SETUP_SIZE; i++) {
 583                 tmp = code[i];
 584
 585                 if ((tmp & (7 << 29)) == (3 << 29) &&
 586                     (tmp & (0x1f << 24)) < (0x1d << 24)) {
 587                         OUT_RING(tmp);
 588                         j++;
 589                 } else
 590                         printk("texture state dropped!!!\n");
 591         }
 592
 593         if (j & 1)
 594                 OUT_RING(0);
 595
 596         ADVANCE_LP_RING();
 597 }
 598
 599 /* Need to do some additional checking when setting the dest buffer.
 600  */
 601 static void i810EmitDestVerified(struct drm_device * dev,
 602                                  volatile unsigned int *code)
 603 {
 604         drm_i810_private_t *dev_priv = dev->dev_private;
 605         unsigned int tmp;
 606         RING_LOCALS;
 607
 608         BEGIN_LP_RING(I810_DEST_SETUP_SIZE + 2);
 609
 610         tmp = code[I810_DESTREG_DI1];
 611         if (tmp == dev_priv->front_di1 || tmp == dev_priv->back_di1) {
 612                 OUT_RING(CMD_OP_DESTBUFFER_INFO);
 613                 OUT_RING(tmp);
 614         } else
 615                 DRM_DEBUG("bad di1 %x (allow %x or %x)\n",
 616                           tmp, dev_priv->front_di1, dev_priv->back_di1);
 617
 618         /* invarient:
 619          */
 620         OUT_RING(CMD_OP_Z_BUFFER_INFO);
 621         OUT_RING(dev_priv->zi1);
 622
 623         OUT_RING(GFX_OP_DESTBUFFER_VARS);
 624         OUT_RING(code[I810_DESTREG_DV1]);
 625
 626         OUT_RING(GFX_OP_DRAWRECT_INFO);
 627         OUT_RING(code[I810_DESTREG_DR1]);
 628         OUT_RING(code[I810_DESTREG_DR2]);
 629         OUT_RING(code[I810_DESTREG_DR3]);
 630         OUT_RING(code[I810_DESTREG_DR4]);
 631         OUT_RING(0);
 632
 633         ADVANCE_LP_RING();
 634 }
 635
 636 static void i810EmitState(struct drm_device * dev)
 637 {
 638         drm_i810_private_t *dev_priv = dev->dev_private;
 639         drm_i810_sarea_t *sarea_priv = dev_priv->sarea_priv;
 640         unsigned int dirty = sarea_priv->dirty;
 641
 642         DRM_DEBUG("%s %x\n", __FUNCTION__, dirty);
 643
 644         if (dirty & I810_UPLOAD_BUFFERS) {
 645                 i810EmitDestVerified(dev, sarea_priv->BufferState);
 646                 sarea_priv->dirty &= ~I810_UPLOAD_BUFFERS;
 647         }
 648
 649         if (dirty & I810_UPLOAD_CTX) {
 650                 i810EmitContextVerified(dev, sarea_priv->ContextState);
 651                 sarea_priv->dirty &= ~I810_UPLOAD_CTX;
 652         }
 653
 654         if (dirty & I810_UPLOAD_TEX0) {
 655                 i810EmitTexVerified(dev, sarea_priv->TexState[0]);
 656                 sarea_priv->dirty &= ~I810_UPLOAD_TEX0;
 657         }
 658
 659         if (dirty & I810_UPLOAD_TEX1) {
 660                 i810EmitTexVerified(dev, sarea_priv->TexState[1]);
 661                 sarea_priv->dirty &= ~I810_UPLOAD_TEX1;
 662         }
 663 }
 664
 665 /* need to verify
 666  */
 667 static void i810_dma_dispatch_clear(struct drm_device * dev, int flags,
 668                                     unsigned int clear_color,
 669                                     unsigned int clear_zval)
 670 {
 671         drm_i810_private_t *dev_priv = dev->dev_private;
 672         drm_i810_sarea_t *sarea_priv = dev_priv->sarea_priv;
 673         int nbox = sarea_priv->nbox;
 674         struct drm_clip_rect *pbox = sarea_priv->boxes;
 675         int pitch = dev_priv->pitch;
 676         int cpp = 2;
 677         int i;
 678         RING_LOCALS;
 679
 680         if (dev_priv->current_page == 1) {
 681                 unsigned int tmp = flags;
 682
 683                 flags &= ~(I810_FRONT | I810_BACK);
 684                 if (tmp & I810_FRONT)
 685                         flags |= I810_BACK;
 686                 if (tmp & I810_BACK)
 687                         flags |= I810_FRONT;
 688         }
 689
 690         i810_kernel_lost_context(dev);
 691
 692         if (nbox > I810_NR_SAREA_CLIPRECTS)
 693                 nbox = I810_NR_SAREA_CLIPRECTS;
 694
 695         for (i = 0; i < nbox; i++, pbox++) {
 696                 unsigned int x = pbox->x1;
 697                 unsigned int y = pbox->y1;
 698                 unsigned int width = (pbox->x2 - x) * cpp;
 699                 unsigned int height = pbox->y2 - y;
 700                 unsigned int start = y * pitch + x * cpp;
 701
 702                 if (pbox->x1 > pbox->x2 ||
 703                     pbox->y1 > pbox->y2 ||
 704                     pbox->x2 > dev_priv->w || pbox->y2 > dev_priv->h)
 705                         continue;
 706
 707                 if (flags & I810_FRONT) {
 708                         BEGIN_LP_RING(6);
 709                         OUT_RING(BR00_BITBLT_CLIENT | BR00_OP_COLOR_BLT | 0x3);
 710                         OUT_RING(BR13_SOLID_PATTERN | (0xF0 << 16) | pitch);
 711                         OUT_RING((height << 16) | width);
 712                         OUT_RING(start);
 713                         OUT_RING(clear_color);
 714                         OUT_RING(0);
 715                         ADVANCE_LP_RING();
 716                 }
 717
 718                 if (flags & I810_BACK) {
 719                         BEGIN_LP_RING(6);
 720                         OUT_RING(BR00_BITBLT_CLIENT | BR00_OP_COLOR_BLT | 0x3);
 721                         OUT_RING(BR13_SOLID_PATTERN | (0xF0 << 16) | pitch);
 722                         OUT_RING((height << 16) | width);
 723                         OUT_RING(dev_priv->back_offset + start);
 724                         OUT_RING(clear_color);
 725                         OUT_RING(0);
 726                         ADVANCE_LP_RING();
 727                 }
 728
 729                 if (flags & I810_DEPTH) {
 730                         BEGIN_LP_RING(6);
 731                         OUT_RING(BR00_BITBLT_CLIENT | BR00_OP_COLOR_BLT | 0x3);
 732                         OUT_RING(BR13_SOLID_PATTERN | (0xF0 << 16) | pitch);
 733                         OUT_RING((height << 16) | width);
 734                         OUT_RING(dev_priv->depth_offset + start);
 735                         OUT_RING(clear_zval);
 736                         OUT_RING(0);
 737                         ADVANCE_LP_RING();
 738                 }
 739         }
 740 }
 741
 742 static void i810_dma_dispatch_swap(struct drm_device * dev)
 743 {
 744         drm_i810_private_t *dev_priv = dev->dev_private;
 745         drm_i810_sarea_t *sarea_priv = dev_priv->sarea_priv;
 746         int nbox = sarea_priv->nbox;
 747         struct drm_clip_rect *pbox = sarea_priv->boxes;
 748         int pitch = dev_priv->pitch;
 749         int cpp = 2;
 750         int i;
 751         RING_LOCALS;
 752
 753         DRM_DEBUG("swapbuffers\n");
 754
 755         i810_kernel_lost_context(dev);
 756
 757         if (nbox > I810_NR_SAREA_CLIPRECTS)
 758                 nbox = I810_NR_SAREA_CLIPRECTS;
 759
 760         for (i = 0; i < nbox; i++, pbox++) {
 761                 unsigned int w = pbox->x2 - pbox->x1;
 762                 unsigned int h = pbox->y2 - pbox->y1;
 763                 unsigned int dst = pbox->x1 * cpp + pbox->y1 * pitch;
 764                 unsigned int start = dst;
 765
 766                 if (pbox->x1 > pbox->x2 ||
 767                     pbox->y1 > pbox->y2 ||
 768                     pbox->x2 > dev_priv->w || pbox->y2 > dev_priv->h)
 769                         continue;
 770
 771                 BEGIN_LP_RING(6);
 772                 OUT_RING(BR00_BITBLT_CLIENT | BR00_OP_SRC_COPY_BLT | 0x4);
 773                 OUT_RING(pitch | (0xCC << 16));
 774                 OUT_RING((h << 16) | (w * cpp));
 775                 if (dev_priv->current_page == 0)
 776                         OUT_RING(dev_priv->front_offset + start);
 777                 else
 778                         OUT_RING(dev_priv->back_offset + start);
 779                 OUT_RING(pitch);
 780                 if (dev_priv->current_page == 0)
 781                         OUT_RING(dev_priv->back_offset + start);
 782                 else
 783                         OUT_RING(dev_priv->front_offset + start);
 784                 ADVANCE_LP_RING();
 785         }
 786 }
 787
 788 static void i810_dma_dispatch_vertex(struct drm_device * dev,
 789                                      struct drm_buf * buf, int discard, int used)
 790 {
 791         drm_i810_private_t *dev_priv = dev->dev_private;
 792         drm_i810_buf_priv_t *buf_priv = buf->dev_private;
 793         drm_i810_sarea_t *sarea_priv = dev_priv->sarea_priv;
 794         struct drm_clip_rect *box = sarea_priv->boxes;
 795         int nbox = sarea_priv->nbox;
 796         unsigned long address = (unsigned long)buf->bus_address;
 797         unsigned long start = address - dev->agp->base;
 798         int i = 0;
 799         RING_LOCALS;
 800
 801         i810_kernel_lost_context(dev);
 802
 803         if (nbox > I810_NR_SAREA_CLIPRECTS)
 804                 nbox = I810_NR_SAREA_CLIPRECTS;
 805
 806         if (used > 4 * 1024)
 807                 used = 0;
 808
 809         if (sarea_priv->dirty)
 810                 i810EmitState(dev);
 811
 812         if (buf_priv->currently_mapped == I810_BUF_MAPPED) {
 813                 unsigned int prim = (sarea_priv->vertex_prim & PR_MASK);
 814
 815                 *(u32 *) buf_priv->kernel_virtual =
 816                     ((GFX_OP_PRIMITIVE | prim | ((used / 4) - 2)));
 817
 818                 if (used & 4) {
 819                         *(u32 *) ((char *) buf_priv->kernel_virtual + used) = 0;
 820                         used += 4;
 821                 }
 822
 823                 i810_unmap_buffer(buf);
 824         }
 825
 826         if (used) {
 827                 do {
 828                         if (i < nbox) {
 829                                 BEGIN_LP_RING(4);
 830                                 OUT_RING(GFX_OP_SCISSOR | SC_UPDATE_SCISSOR |
 831                                          SC_ENABLE);
 832                                 OUT_RING(GFX_OP_SCISSOR_INFO);
 833                                 OUT_RING(box[i].x1 | (box[i].y1 << 16));
 834                                 OUT_RING((box[i].x2 -
 835                                           1) | ((box[i].y2 - 1) << 16));
 836                                 ADVANCE_LP_RING();
 837                         }
 838
 839                         BEGIN_LP_RING(4);
 840                         OUT_RING(CMD_OP_BATCH_BUFFER);
 841                         OUT_RING(start | BB1_PROTECTED);
 842                         OUT_RING(start + used - 4);
 843                         OUT_RING(0);
 844                         ADVANCE_LP_RING();
 845
 846                 } while (++i < nbox);
 847         }
 848
 849         if (discard) {
 850                 dev_priv->counter++;
 851
 852                 (void)cmpxchg(buf_priv->in_use, I810_BUF_CLIENT,
 853                               I810_BUF_HARDWARE);
 854
 855                 BEGIN_LP_RING(8);
 856                 OUT_RING(CMD_STORE_DWORD_IDX);
 857                 OUT_RING(20);
 858                 OUT_RING(dev_priv->counter);
 859                 OUT_RING(CMD_STORE_DWORD_IDX);
 860                 OUT_RING(buf_priv->my_use_idx);
 861                 OUT_RING(I810_BUF_FREE);
 862                 OUT_RING(CMD_REPORT_HEAD);
 863                 OUT_RING(0);
 864                 ADVANCE_LP_RING();
 865         }
 866 }
 867
 868 static void i810_dma_dispatch_flip(struct drm_device * dev)
 869 {
 870         drm_i810_private_t *dev_priv = dev->dev_private;
 871         int pitch = dev_priv->pitch;
 872         RING_LOCALS;
 873
 874         DRM_DEBUG("%s: page=%d pfCurrentPage=%d\n",
 875                   __FUNCTION__,
 876                   dev_priv->current_page,
 877                   dev_priv->sarea_priv->pf_current_page);
 878
 879         i810_kernel_lost_context(dev);
 880
 881         BEGIN_LP_RING(2);
 882         OUT_RING(INST_PARSER_CLIENT | INST_OP_FLUSH | INST_FLUSH_MAP_CACHE);
 883         OUT_RING(0);
 884         ADVANCE_LP_RING();
 885
 886         BEGIN_LP_RING(I810_DEST_SETUP_SIZE + 2);
 887         /* On i815 at least ASYNC is buggy */
 888         /* pitch<<5 is from 11.2.8 p158,
 889            its the pitch / 8 then left shifted 8,
 890            so (pitch >> 3) << 8 */
 891         OUT_RING(CMD_OP_FRONTBUFFER_INFO | (pitch << 5) /*| ASYNC_FLIP */ );
 892         if (dev_priv->current_page == 0) {
 893                 OUT_RING(dev_priv->back_offset);
 894                 dev_priv->current_page = 1;
 895         } else {
 896                 OUT_RING(dev_priv->front_offset);
 897                 dev_priv->current_page = 0;
 898         }
 899         OUT_RING(0);
 900         ADVANCE_LP_RING();
 901
 902         BEGIN_LP_RING(2);
 903         OUT_RING(CMD_OP_WAIT_FOR_EVENT | WAIT_FOR_PLANE_A_FLIP);
 904         OUT_RING(0);
 905         ADVANCE_LP_RING();
 906
 907         /* Increment the frame counter.  The client-side 3D driver must
 908          * throttle the framerate by waiting for this value before
 909          * performing the swapbuffer ioctl.
 910          */
 911         dev_priv->sarea_priv->pf_current_page = dev_priv->current_page;
 912
 913 }
 914
 915 static void i810_dma_quiescent(struct drm_device * dev)
 916 {
 917         drm_i810_private_t *dev_priv = dev->dev_private;
 918         RING_LOCALS;
 919
 920 /*      printk("%s\n", __FUNCTION__); */
 921
 922         i810_kernel_lost_context(dev);
 923
 924         BEGIN_LP_RING(4);
 925         OUT_RING(INST_PARSER_CLIENT | INST_OP_FLUSH | INST_FLUSH_MAP_CACHE);
 926         OUT_RING(CMD_REPORT_HEAD);
 927         OUT_RING(0);
 928         OUT_RING(0);
 929         ADVANCE_LP_RING();
 930
 931         i810_wait_ring(dev, dev_priv->ring.Size - 8);
 932 }
 933
 934 static int i810_flush_queue(struct drm_device * dev)
 935 {
 936         drm_i810_private_t *dev_priv = dev->dev_private;
 937         struct drm_device_dma *dma = dev->dma;
 938         int i, ret = 0;
 939         RING_LOCALS;
 940
 941 /*      printk("%s\n", __FUNCTION__); */
 942
 943         i810_kernel_lost_context(dev);
 944
 945         BEGIN_LP_RING(2);
 946         OUT_RING(CMD_REPORT_HEAD);
 947         OUT_RING(0);
 948         ADVANCE_LP_RING();
 949
 950         i810_wait_ring(dev, dev_priv->ring.Size - 8);
 951
 952         for (i = 0; i < dma->buf_count; i++) {
 953                 struct drm_buf *buf = dma->buflist[i];
 954                 drm_i810_buf_priv_t *buf_priv = buf->dev_private;
 955
 956                 int used = cmpxchg(buf_priv->in_use, I810_BUF_HARDWARE,
 957                                    I810_BUF_FREE);
 958
 959                 if (used == I810_BUF_HARDWARE)
 960                         DRM_DEBUG("reclaimed from HARDWARE\n");
 961                 if (used == I810_BUF_CLIENT)
 962                         DRM_DEBUG("still on client\n");
 963         }
 964
 965         return ret;
 966 }
 967
 968 /* Must be called with the lock held */
 969 static void i810_reclaim_buffers(struct drm_device * dev,
 970                                  struct drm_file *file_priv)
 971 {
 972         struct drm_device_dma *dma = dev->dma;
 973         int i;
 974
 975         if (!dma)
 976                 return;
 977         if (!dev->dev_private)
 978                 return;
 979         if (!dma->buflist)
 980                 return;
 981
 982         i810_flush_queue(dev);
 983
 984         for (i = 0; i < dma->buf_count; i++) {
 985                 struct drm_buf *buf = dma->buflist[i];
 986                 drm_i810_buf_priv_t *buf_priv = buf->dev_private;
 987
 988                 if (buf->file_priv == file_priv && buf_priv) {
 989                         int used = cmpxchg(buf_priv->in_use, I810_BUF_CLIENT,
 990                                            I810_BUF_FREE);
 991
 992                         if (used == I810_BUF_CLIENT)
 993                                 DRM_DEBUG("reclaimed from client\n");
 994                         if (buf_priv->currently_mapped == I810_BUF_MAPPED)
 995                                 buf_priv->currently_mapped = I810_BUF_UNMAPPED;
 996                 }
 997         }
 998 }
 999
1000 static int i810_flush_ioctl(struct inode *inode, struct drm_file *file_priv,
1001                             unsigned int cmd, unsigned long arg)
1002 {
1003         struct drm_device *dev = file_priv->head->dev;
1004
1005         LOCK_TEST_WITH_RETURN(dev, file_priv);
1006
1007         i810_flush_queue(dev);
1008         return 0;
1009 }
1010
1011 static int i810_dma_vertex(struct inode *inode, struct drm_file *file_priv,
1012                            unsigned int cmd, unsigned long arg)
1013 {
1014         struct drm_device *dev = file_priv->head->dev;
1015         struct drm_device_dma *dma = dev->dma;
1016         drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
1017         u32 *hw_status = dev_priv->hw_status_page;
1018         drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
1019             dev_priv->sarea_priv;
1020         drm_i810_vertex_t vertex;
1021
1022         if (copy_from_user
1023             (&vertex, (drm_i810_vertex_t __user *) arg, sizeof(vertex)))
1024                 return -EFAULT;
1025
1026         LOCK_TEST_WITH_RETURN(dev, file_priv);
1027
1028         DRM_DEBUG("i810 dma vertex, idx %d used %d discard %d\n",
1029                   vertex.idx, vertex.used, vertex.discard);
1030
1031         if (vertex.idx < 0 || vertex.idx > dma->buf_count)
1032                 return -EINVAL;
1033
1034         i810_dma_dispatch_vertex(dev,
1035                                  dma->buflist[vertex.idx],
1036                                  vertex.discard, vertex.used);
1037
1038         atomic_add(vertex.used, &dev->counts[_DRM_STAT_SECONDARY]);
1039         atomic_inc(&dev->counts[_DRM_STAT_DMA]);
1040         sarea_priv->last_enqueue = dev_priv->counter - 1;
1041         sarea_priv->last_dispatch = (int)hw_status[5];
1042
1043         return 0;
1044 }
1045
1046 static int i810_clear_bufs(struct inode *inode, struct drm_file *file_priv,
1047                            unsigned int cmd, unsigned long arg)
1048 {
1049         struct drm_device *dev = file_priv->head->dev;
1050         drm_i810_clear_t clear;
1051
1052         if (copy_from_user
1053             (&clear, (drm_i810_clear_t __user *) arg, sizeof(clear)))
1054                 return -EFAULT;
1055
1056         LOCK_TEST_WITH_RETURN(dev, file_priv);
1057
1058         /* GH: Someone's doing nasty things... */
1059         if (!dev->dev_private) {
1060                 return -EINVAL;
1061         }
1062
1063         i810_dma_dispatch_clear(dev, clear.flags,
1064                                 clear.clear_color, clear.clear_depth);
1065         return 0;
1066 }
1067
1068 static int i810_swap_bufs(struct inode *inode, struct drm_file *file_priv,
1069                           unsigned int cmd, unsigned long arg)
1070 {
1071         struct drm_device *dev = file_priv->head->dev;
1072
1073         DRM_DEBUG("i810_swap_bufs\n");
1074
1075         LOCK_TEST_WITH_RETURN(dev, file_priv);
1076
1077         i810_dma_dispatch_swap(dev);
1078         return 0;
1079 }
1080
1081 static int i810_getage(struct inode *inode, struct drm_file *file_priv,
1082                        unsigned int cmd,
1083                        unsigned long arg)
1084 {
1085         struct drm_device *dev = file_priv->head->dev;
1086         drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
1087         u32 *hw_status = dev_priv->hw_status_page;
1088         drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
1089             dev_priv->sarea_priv;
1090
1091         sarea_priv->last_dispatch = (int)hw_status[5];
1092         return 0;
1093 }
1094
1095 static int i810_getbuf(struct inode *inode, struct drm_file *file_priv,
1096                        unsigned int cmd, unsigned long arg)
1097 {
1098         struct drm_device *dev = file_priv->head->dev;
1099         int retcode = 0;
1100         drm_i810_dma_t d;
1101         drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
1102         u32 *hw_status = dev_priv->hw_status_page;
1103         drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
1104             dev_priv->sarea_priv;
1105
1106         if (copy_from_user(&d, (drm_i810_dma_t __user *) arg, sizeof(d)))
1107                 return -EFAULT;
1108
1109         LOCK_TEST_WITH_RETURN(dev, file_priv);
1110
1111         d.granted = 0;
1112
1113         retcode = i810_dma_get_buffer(dev, &d, file_priv);
1114
1115         DRM_DEBUG("i810_dma: %d returning %d, granted = %d\n",
1116                   current->pid, retcode, d.granted);
1117
1118         if (copy_to_user((void __user *) arg, &d, sizeof(d)))
1119                 return -EFAULT;
1120         sarea_priv->last_dispatch = (int)hw_status[5];
1121
1122         return retcode;
1123 }
1124
1125 static int i810_copybuf(struct inode *inode, struct drm_file *file_priv,
1126                         unsigned int cmd, unsigned long arg)
1127 {
1128         /* Never copy - 2.4.x doesn't need it */
1129         return 0;
1130 }
1131
1132 static int i810_docopy(struct inode *inode, struct drm_file *file_priv,
1133                        unsigned int cmd, unsigned long arg)
1134 {
1135         /* Never copy - 2.4.x doesn't need it */
1136         return 0;
1137 }
1138
1139 static void i810_dma_dispatch_mc(struct drm_device * dev, struct drm_buf * buf, int used,
1140                                  unsigned int last_render)
1141 {
1142         drm_i810_private_t *dev_priv = dev->dev_private;
1143         drm_i810_buf_priv_t *buf_priv = buf->dev_private;
1144         drm_i810_sarea_t *sarea_priv = dev_priv->sarea_priv;
1145         unsigned long address = (unsigned long)buf->bus_address;
1146         unsigned long start = address - dev->agp->base;
1147         int u;
1148         RING_LOCALS;
1149
1150         i810_kernel_lost_context(dev);
1151
1152         u = cmpxchg(buf_priv->in_use, I810_BUF_CLIENT, I810_BUF_HARDWARE);
1153         if (u != I810_BUF_CLIENT) {
1154                 DRM_DEBUG("MC found buffer that isn't mine!\n");
1155         }
1156
1157         if (used > 4 * 1024)
1158                 used = 0;
1159
1160         sarea_priv->dirty = 0x7f;
1161
1162         DRM_DEBUG("dispatch mc addr 0x%lx, used 0x%x\n", address, used);
1163
1164         dev_priv->counter++;
1165         DRM_DEBUG("dispatch counter : %ld\n", dev_priv->counter);
1166         DRM_DEBUG("i810_dma_dispatch_mc\n");
1167         DRM_DEBUG("start : %lx\n", start);
1168         DRM_DEBUG("used : %d\n", used);
1169         DRM_DEBUG("start + used - 4 : %ld\n", start + used - 4);
1170
1171         if (buf_priv->currently_mapped == I810_BUF_MAPPED) {
1172                 if (used & 4) {
1173                         *(u32 *) ((char *) buf_priv->virtual + used) = 0;
1174                         used += 4;
1175                 }
1176
1177                 i810_unmap_buffer(buf);
1178         }
1179         BEGIN_LP_RING(4);
1180         OUT_RING(CMD_OP_BATCH_BUFFER);
1181         OUT_RING(start | BB1_PROTECTED);
1182         OUT_RING(start + used - 4);
1183         OUT_RING(0);
1184         ADVANCE_LP_RING();
1185
1186         BEGIN_LP_RING(8);
1187         OUT_RING(CMD_STORE_DWORD_IDX);
1188         OUT_RING(buf_priv->my_use_idx);
1189         OUT_RING(I810_BUF_FREE);
1190         OUT_RING(0);
1191
1192         OUT_RING(CMD_STORE_DWORD_IDX);
1193         OUT_RING(16);
1194         OUT_RING(last_render);
1195         OUT_RING(0);
1196         ADVANCE_LP_RING();
1197 }
1198
1199 static int i810_dma_mc(struct inode *inode, struct drm_file *file_priv,
1200                        unsigned int cmd, unsigned long arg)
1201 {
1202         struct drm_device *dev = file_priv->head->dev;
1203         struct drm_device_dma *dma = dev->dma;
1204         drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
1205         u32 *hw_status = dev_priv->hw_status_page;
1206         drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
1207             dev_priv->sarea_priv;
1208         drm_i810_mc_t mc;
1209
1210         if (copy_from_user(&mc, (drm_i810_mc_t __user *) arg, sizeof(mc)))
1211                 return -EFAULT;
1212
1213         LOCK_TEST_WITH_RETURN(dev, file_priv);
1214
1215         if (mc.idx >= dma->buf_count || mc.idx < 0)
1216                 return -EINVAL;
1217
1218         i810_dma_dispatch_mc(dev, dma->buflist[mc.idx], mc.used,
1219                              mc.last_render);
1220
1221         atomic_add(mc.used, &dev->counts[_DRM_STAT_SECONDARY]);
1222         atomic_inc(&dev->counts[_DRM_STAT_DMA]);
1223         sarea_priv->last_enqueue = dev_priv->counter - 1;
1224         sarea_priv->last_dispatch = (int)hw_status[5];
1225
1226         return 0;
1227 }
1228
1229 static int i810_rstatus(struct inode *inode, struct drm_file *file_priv,
1230                         unsigned int cmd, unsigned long arg)
1231 {
1232         struct drm_device *dev = file_priv->head->dev;
1233         drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
1234
1235         return (int)(((u32 *) (dev_priv->hw_status_page))[4]);
1236 }
1237
1238 static int i810_ov0_info(struct inode *inode, struct drm_file *file_priv,
1239                          unsigned int cmd, unsigned long arg)
1240 {
1241         struct drm_device *dev = file_priv->head->dev;
1242         drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
1243         drm_i810_overlay_t data;
1244
1245         data.offset = dev_priv->overlay_offset;
1246         data.physical = dev_priv->overlay_physical;
1247         if (copy_to_user
1248             ((drm_i810_overlay_t __user *) arg, &data, sizeof(data)))
1249                 return -EFAULT;
1250         return 0;
1251 }
1252
1253 static int i810_fstatus(struct inode *inode, struct drm_file *file_priv,
1254                         unsigned int cmd, unsigned long arg)
1255 {
1256         struct drm_device *dev = file_priv->head->dev;
1257         drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
1258
1259         LOCK_TEST_WITH_RETURN(dev, file_priv);
1260
1261         return I810_READ(0x30008);
1262 }
1263
1264 static int i810_ov0_flip(struct inode *inode, struct drm_file *file_priv,
1265                          unsigned int cmd, unsigned long arg)
1266 {
1267         struct drm_device *dev = file_priv->head->dev;
1268         drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
1269
1270         LOCK_TEST_WITH_RETURN(dev, file_priv);
1271
1272         //Tell the overlay to update
1273         I810_WRITE(0x30000, dev_priv->overlay_physical | 0x80000000);
1274
1275         return 0;
1276 }
1277
1278 /* Not sure why this isn't set all the time:
1279  */
1280 static void i810_do_init_pageflip(struct drm_device * dev)
1281 {
1282         drm_i810_private_t *dev_priv = dev->dev_private;
1283
1284         DRM_DEBUG("%s\n", __FUNCTION__);
1285         dev_priv->page_flipping = 1;
1286         dev_priv->current_page = 0;
1287         dev_priv->sarea_priv->pf_current_page = dev_priv->current_page;
1288 }
1289
1290 static int i810_do_cleanup_pageflip(struct drm_device * dev)
1291 {
1292         drm_i810_private_t *dev_priv = dev->dev_private;
1293
1294         DRM_DEBUG("%s\n", __FUNCTION__);
1295         if (dev_priv->current_page != 0)
1296                 i810_dma_dispatch_flip(dev);
1297
1298         dev_priv->page_flipping = 0;
1299         return 0;
1300 }
1301
1302 static int i810_flip_bufs(struct inode *inode, struct drm_file *file_priv,
1303                           unsigned int cmd, unsigned long arg)
1304 {
1305         struct drm_device *dev = file_priv->head->dev;
1306         drm_i810_private_t *dev_priv = dev->dev_private;
1307
1308         DRM_DEBUG("%s\n", __FUNCTION__);
1309
1310         LOCK_TEST_WITH_RETURN(dev, file_priv);
1311
1312         if (!dev_priv->page_flipping)
1313                 i810_do_init_pageflip(dev);
1314
1315         i810_dma_dispatch_flip(dev);
1316         return 0;
1317 }
1318
1319 int i810_driver_load(struct drm_device *dev, unsigned long flags)
1320 {
1321         /* i810 has 4 more counters */
1322         dev->counters += 4;
1323         dev->types[6] = _DRM_STAT_IRQ;
1324         dev->types[7] = _DRM_STAT_PRIMARY;
1325         dev->types[8] = _DRM_STAT_SECONDARY;
1326         dev->types[9] = _DRM_STAT_DMA;
1327
1328         return 0;
1329 }
1330
1331 void i810_driver_lastclose(struct drm_device * dev)
1332 {
1333         i810_dma_cleanup(dev);
1334 }
1335
1336 void i810_driver_preclose(struct drm_device * dev, struct drm_file *file_priv)
1337 {
1338         if (dev->dev_private) {
1339                 drm_i810_private_t *dev_priv = dev->dev_private;
1340                 if (dev_priv->page_flipping) {
1341                         i810_do_cleanup_pageflip(dev);
1342                 }
1343         }
1344 }
1345
1346 void i810_driver_reclaim_buffers_locked(struct drm_device * dev,
1347                                         struct drm_file *file_priv)
1348 {
1349         i810_reclaim_buffers(dev, file_priv);
1350 }
1351
1352 int i810_driver_dma_quiescent(struct drm_device * dev)
1353 {
1354         i810_dma_quiescent(dev);
1355         return 0;
1356 }
1357
1358 drm_ioctl_desc_t i810_ioctls[] = {
1359         [DRM_IOCTL_NR(DRM_I810_INIT)] = {i810_dma_init, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
1360         [DRM_IOCTL_NR(DRM_I810_VERTEX)] = {i810_dma_vertex, DRM_AUTH},
1361         [DRM_IOCTL_NR(DRM_I810_CLEAR)] = {i810_clear_bufs, DRM_AUTH},
1362         [DRM_IOCTL_NR(DRM_I810_FLUSH)] = {i810_flush_ioctl, DRM_AUTH},
1363         [DRM_IOCTL_NR(DRM_I810_GETAGE)] = {i810_getage, DRM_AUTH},
1364         [DRM_IOCTL_NR(DRM_I810_GETBUF)] = {i810_getbuf, DRM_AUTH},
1365         [DRM_IOCTL_NR(DRM_I810_SWAP)] = {i810_swap_bufs, DRM_AUTH},
1366         [DRM_IOCTL_NR(DRM_I810_COPY)] = {i810_copybuf, DRM_AUTH},
1367         [DRM_IOCTL_NR(DRM_I810_DOCOPY)] = {i810_docopy, DRM_AUTH},
1368         [DRM_IOCTL_NR(DRM_I810_OV0INFO)] = {i810_ov0_info, DRM_AUTH},
1369         [DRM_IOCTL_NR(DRM_I810_FSTATUS)] = {i810_fstatus, DRM_AUTH},
1370         [DRM_IOCTL_NR(DRM_I810_OV0FLIP)] = {i810_ov0_flip, DRM_AUTH},
1371         [DRM_IOCTL_NR(DRM_I810_MC)] = {i810_dma_mc, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
1372         [DRM_IOCTL_NR(DRM_I810_RSTATUS)] = {i810_rstatus, DRM_AUTH},
1373         [DRM_IOCTL_NR(DRM_I810_FLIP)] = {i810_flip_bufs, DRM_AUTH}
1374 };
1375
1376 int i810_max_ioctl = DRM_ARRAY_SIZE(i810_ioctls);
1377
1378 /**
1379  * Determine if the device really is AGP or not.
1380  *
1381  * All Intel graphics chipsets are treated as AGP, even if they are really
1382  * PCI-e.
1383  *
1384  * \param dev   The device to be tested.
1385  *
1386  * \returns
1387  * A value of 1 is always retured to indictate every i810 is AGP.
1388  */
1389 int i810_driver_device_is_agp(struct drm_device * dev)
1390 {
1391         return 1;
1392 }