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