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 "i810.h"
  34 #include "drmP.h"
  35 #include "drm.h"
  36 #include "i810_drm.h"
  37 #include "i810_drv.h"
  38 #include <linux/interrupt.h>    /* For task queue support */
  39 #include <linux/delay.h>
  40 #include <linux/pagemap.h>
  41
  42 #define I810_BUF_FREE           2
  43 #define I810_BUF_CLIENT         1
  44 #define I810_BUF_HARDWARE       0
  45
  46 #define I810_BUF_UNMAPPED 0
  47 #define I810_BUF_MAPPED   1
  48
  49 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,4,2)
  50 #define down_write down
  51 #define up_write up
  52 #endif
  53
  54 static inline void i810_print_status_page(drm_device_t *dev)
  55 {
  56         drm_device_dma_t *dma = dev->dma;
  57         drm_i810_private_t *dev_priv = dev->dev_private;
  58         u32 *temp = dev_priv->hw_status_page;
  59         int i;
  60
  61         DRM_DEBUG(  "hw_status: Interrupt Status : %x\n", temp[0]);
  62         DRM_DEBUG(  "hw_status: LpRing Head ptr : %x\n", temp[1]);
  63         DRM_DEBUG(  "hw_status: IRing Head ptr : %x\n", temp[2]);
  64         DRM_DEBUG(  "hw_status: Reserved : %x\n", temp[3]);
  65         DRM_DEBUG(  "hw_status: Last Render: %x\n", temp[4]);
  66         DRM_DEBUG(  "hw_status: Driver Counter : %d\n", temp[5]);
  67         for(i = 6; i < dma->buf_count + 6; i++) {
  68                 DRM_DEBUG( "buffer status idx : %d used: %d\n", i - 6, temp[i]);
  69         }
  70 }
  71
  72 static drm_buf_t *i810_freelist_get(drm_device_t *dev)
  73 {
  74         drm_device_dma_t *dma = dev->dma;
  75         int              i;
  76         int              used;
  77
  78         /* Linear search might not be the best solution */
  79
  80         for (i = 0; i < dma->buf_count; i++) {
  81                 drm_buf_t *buf = dma->buflist[ i ];
  82                 drm_i810_buf_priv_t *buf_priv = buf->dev_private;
  83                 /* In use is already a pointer */
  84                 used = cmpxchg(buf_priv->in_use, I810_BUF_FREE,
  85                                I810_BUF_CLIENT);
  86                 if (used == I810_BUF_FREE) {
  87                         return buf;
  88                 }
  89         }
  90         return NULL;
  91 }
  92
  93 /* This should only be called if the buffer is not sent to the hardware
  94  * yet, the hardware updates in use for us once its on the ring buffer.
  95  */
  96
  97 static int i810_freelist_put(drm_device_t *dev, drm_buf_t *buf)
  98 {
  99         drm_i810_buf_priv_t *buf_priv = buf->dev_private;
 100         int used;
 101
 102         /* In use is already a pointer */
 103         used = cmpxchg(buf_priv->in_use, I810_BUF_CLIENT, I810_BUF_FREE);
 104         if (used != I810_BUF_CLIENT) {
 105                 DRM_ERROR("Freeing buffer thats not in use : %d\n", buf->idx);
 106                 return -EINVAL;
 107         }
 108
 109         return 0;
 110 }
 111
 112 static struct file_operations i810_buffer_fops = {
 113         .open    = DRM(open),
 114         .flush   = DRM(flush),
 115         .release = DRM(release),
 116         .ioctl   = DRM(ioctl),
 117         .mmap    = i810_mmap_buffers,
 118         .fasync  = DRM(fasync),
 119 };
 120
 121 int i810_mmap_buffers(struct file *filp, struct vm_area_struct *vma)
 122 {
 123         drm_file_t          *priv         = filp->private_data;
 124         drm_device_t        *dev;
 125         drm_i810_private_t  *dev_priv;
 126         drm_buf_t           *buf;
 127         drm_i810_buf_priv_t *buf_priv;
 128
 129         lock_kernel();
 130         dev      = priv->dev;
 131         dev_priv = dev->dev_private;
 132         buf      = dev_priv->mmap_buffer;
 133         buf_priv = buf->dev_private;
 134
 135         vma->vm_flags |= (VM_IO | VM_DONTCOPY);
 136         vma->vm_file = filp;
 137
 138         buf_priv->currently_mapped = I810_BUF_MAPPED;
 139         unlock_kernel();
 140
 141         if (remap_page_range(DRM_RPR_ARG(vma) vma->vm_start,
 142                              VM_OFFSET(vma),
 143                              vma->vm_end - vma->vm_start,
 144                              vma->vm_page_prot)) return -EAGAIN;
 145         return 0;
 146 }
 147
 148 static int i810_map_buffer(drm_buf_t *buf, struct file *filp)
 149 {
 150         drm_file_t        *priv   = filp->private_data;
 151         drm_device_t      *dev    = priv->dev;
 152         drm_i810_buf_priv_t *buf_priv = buf->dev_private;
 153         drm_i810_private_t *dev_priv = dev->dev_private;
 154         struct file_operations *old_fops;
 155         int retcode = 0;
 156
 157         if (buf_priv->currently_mapped == I810_BUF_MAPPED)
 158                 return -EINVAL;
 159
 160         down_write( &current->mm->mmap_sem );
 161         old_fops = filp->f_op;
 162         filp->f_op = &i810_buffer_fops;
 163         dev_priv->mmap_buffer = buf;
 164         buf_priv->virtual = (void *)do_mmap(filp, 0, buf->total,
 165                                             PROT_READ|PROT_WRITE,
 166                                             MAP_SHARED,
 167                                             buf->bus_address);
 168         dev_priv->mmap_buffer = NULL;
 169         filp->f_op = old_fops;
 170         if ((unsigned long)buf_priv->virtual > -1024UL) {
 171                 /* Real error */
 172                 DRM_ERROR("mmap error\n");
 173                 retcode = (signed int)buf_priv->virtual;
 174                 buf_priv->virtual = 0;
 175         }
 176         up_write( &current->mm->mmap_sem );
 177
 178         return retcode;
 179 }
 180
 181 static int i810_unmap_buffer(drm_buf_t *buf)
 182 {
 183         drm_i810_buf_priv_t *buf_priv = buf->dev_private;
 184         int retcode = 0;
 185
 186         if (buf_priv->currently_mapped != I810_BUF_MAPPED)
 187                 return -EINVAL;
 188
 189         down_write(&current->mm->mmap_sem);
 190         retcode = do_munmap(current->mm,
 191                             (unsigned long)buf_priv->virtual,
 192                             (size_t) buf->total);
 193         up_write(&current->mm->mmap_sem);
 194
 195         buf_priv->currently_mapped = I810_BUF_UNMAPPED;
 196         buf_priv->virtual = 0;
 197
 198         return retcode;
 199 }
 200
 201 static int i810_dma_get_buffer(drm_device_t *dev, drm_i810_dma_t *d,
 202                                struct file *filp)
 203 {
 204         drm_buf_t         *buf;
 205         drm_i810_buf_priv_t *buf_priv;
 206         int retcode = 0;
 207
 208         buf = i810_freelist_get(dev);
 209         if (!buf) {
 210                 retcode = -ENOMEM;
 211                 DRM_DEBUG("retcode=%d\n", retcode);
 212                 return retcode;
 213         }
 214
 215         retcode = i810_map_buffer(buf, filp);
 216         if (retcode) {
 217                 i810_freelist_put(dev, buf);
 218                 DRM_ERROR("mapbuf failed, retcode %d\n", retcode);
 219                 return retcode;
 220         }
 221         buf->filp = filp;
 222         buf_priv = buf->dev_private;
 223         d->granted = 1;
 224         d->request_idx = buf->idx;
 225         d->request_size = buf->total;
 226         d->virtual = buf_priv->virtual;
 227
 228         return retcode;
 229 }
 230
 231 int i810_dma_cleanup(drm_device_t *dev)
 232 {
 233         drm_device_dma_t *dma = dev->dma;
 234
 235 #if __HAVE_IRQ
 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 ( dev->irq_enabled ) DRM(irq_uninstall)(dev);
 241 #endif
 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         DRM_FIND_MAP( dev_priv->mmio_map, 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         DRM_FIND_MAP( dev_priv->buffer_map, init->buffers_offset );
 375         if (!dev_priv->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 *)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 *)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 *)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 *)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(struct file *filp)
1000 {
1001         drm_file_t    *priv   = filp->private_data;
1002         drm_device_t  *dev    = priv->dev;
1003         drm_device_dma_t *dma = dev->dma;
1004         int              i;
1005
1006         if (!dma) return;
1007         if (!dev->dev_private) return;
1008         if (!dma->buflist) return;
1009
1010         i810_flush_queue(dev);
1011
1012         for (i = 0; i < dma->buf_count; i++) {
1013                 drm_buf_t *buf = dma->buflist[ i ];
1014                 drm_i810_buf_priv_t *buf_priv = buf->dev_private;
1015
1016                 if (buf->filp == filp && buf_priv) {
1017                         int used = cmpxchg(buf_priv->in_use, I810_BUF_CLIENT,
1018                                            I810_BUF_FREE);
1019
1020                         if (used == I810_BUF_CLIENT)
1021                                 DRM_DEBUG("reclaimed from client\n");
1022                         if (buf_priv->currently_mapped == I810_BUF_MAPPED)
1023                                 buf_priv->currently_mapped = I810_BUF_UNMAPPED;
1024                 }
1025         }
1026 }
1027
1028 int i810_flush_ioctl(struct inode *inode, struct file *filp,
1029                      unsigned int cmd, unsigned long arg)
1030 {
1031         drm_file_t        *priv   = filp->private_data;
1032         drm_device_t      *dev    = priv->dev;
1033
1034         if (!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
1035                 DRM_ERROR("i810_flush_ioctl called without lock held\n");
1036                 return -EINVAL;
1037         }
1038
1039         i810_flush_queue(dev);
1040         return 0;
1041 }
1042
1043
1044 int i810_dma_vertex(struct inode *inode, struct file *filp,
1045                unsigned int cmd, unsigned long arg)
1046 {
1047         drm_file_t *priv = filp->private_data;
1048         drm_device_t *dev = priv->dev;
1049         drm_device_dma_t *dma = dev->dma;
1050         drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;
1051         u32 *hw_status = dev_priv->hw_status_page;
1052         drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
1053                                         dev_priv->sarea_priv;
1054         drm_i810_vertex_t vertex;
1055
1056         if (copy_from_user(&vertex, (drm_i810_vertex_t *)arg, sizeof(vertex)))
1057                 return -EFAULT;
1058
1059         if (!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
1060                 DRM_ERROR("i810_dma_vertex called without lock held\n");
1061                 return -EINVAL;
1062         }
1063
1064         DRM_DEBUG("i810 dma vertex, idx %d used %d discard %d\n",
1065                   vertex.idx, vertex.used, vertex.discard);
1066
1067         if (vertex.idx < 0 || vertex.idx > dma->buf_count)
1068                 return -EINVAL;
1069
1070         i810_dma_dispatch_vertex( dev,
1071                                   dma->buflist[ vertex.idx ],
1072                                   vertex.discard, vertex.used );
1073
1074         atomic_add(vertex.used, &dev->counts[_DRM_STAT_SECONDARY]);
1075         atomic_inc(&dev->counts[_DRM_STAT_DMA]);
1076         sarea_priv->last_enqueue = dev_priv->counter-1;
1077         sarea_priv->last_dispatch = (int) hw_status[5];
1078
1079         return 0;
1080 }
1081
1082
1083
1084 int i810_clear_bufs(struct inode *inode, struct file *filp,
1085                    unsigned int cmd, unsigned long arg)
1086 {
1087         drm_file_t *priv = filp->private_data;
1088         drm_device_t *dev = priv->dev;
1089         drm_i810_clear_t clear;
1090
1091         if (copy_from_user(&clear, (drm_i810_clear_t *)arg, sizeof(clear)))
1092                 return -EFAULT;
1093
1094         if (!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
1095                 DRM_ERROR("i810_clear_bufs called without lock held\n");
1096                 return -EINVAL;
1097         }
1098
1099         /* GH: Someone's doing nasty things... */
1100         if (!dev->dev_private) {
1101                 return -EINVAL;
1102         }
1103
1104         i810_dma_dispatch_clear( dev, clear.flags,
1105                                  clear.clear_color,
1106                                  clear.clear_depth );
1107         return 0;
1108 }
1109
1110 int i810_swap_bufs(struct inode *inode, struct file *filp,
1111                   unsigned int cmd, unsigned long arg)
1112 {
1113         drm_file_t *priv = filp->private_data;
1114         drm_device_t *dev = priv->dev;
1115
1116         DRM_DEBUG("i810_swap_bufs\n");
1117
1118         if (!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
1119                 DRM_ERROR("i810_swap_buf called without lock held\n");
1120                 return -EINVAL;
1121         }
1122
1123         i810_dma_dispatch_swap( dev );
1124         return 0;
1125 }
1126
1127 int i810_getage(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         drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;
1133         u32 *hw_status = dev_priv->hw_status_page;
1134         drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
1135                                         dev_priv->sarea_priv;
1136
1137         sarea_priv->last_dispatch = (int) hw_status[5];
1138         return 0;
1139 }
1140
1141 int i810_getbuf(struct inode *inode, struct file *filp, unsigned int cmd,
1142                 unsigned long arg)
1143 {
1144         drm_file_t        *priv     = filp->private_data;
1145         drm_device_t      *dev      = priv->dev;
1146         int               retcode   = 0;
1147         drm_i810_dma_t    d;
1148         drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;
1149         u32 *hw_status = dev_priv->hw_status_page;
1150         drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
1151                                         dev_priv->sarea_priv;
1152
1153         if (copy_from_user(&d, (drm_i810_dma_t *)arg, sizeof(d)))
1154                 return -EFAULT;
1155
1156         if (!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
1157                 DRM_ERROR("i810_dma called without lock held\n");
1158                 return -EINVAL;
1159         }
1160
1161         d.granted = 0;
1162
1163         retcode = i810_dma_get_buffer(dev, &d, filp);
1164
1165         DRM_DEBUG("i810_dma: %d returning %d, granted = %d\n",
1166                   current->pid, retcode, d.granted);
1167
1168         if (copy_to_user((drm_dma_t *)arg, &d, sizeof(d)))
1169                 return -EFAULT;
1170         sarea_priv->last_dispatch = (int) hw_status[5];
1171
1172         return retcode;
1173 }
1174
1175 int i810_copybuf(struct inode *inode,
1176                  struct file *filp,
1177                  unsigned int cmd,
1178                  unsigned long arg)
1179 {
1180         /* Never copy - 2.4.x doesn't need it */
1181         return 0;
1182 }
1183
1184 int i810_docopy(struct inode *inode, struct file *filp, unsigned int cmd,
1185                 unsigned long arg)
1186 {
1187         /* Never copy - 2.4.x doesn't need it */
1188         return 0;
1189 }
1190
1191 static void i810_dma_dispatch_mc(drm_device_t *dev, drm_buf_t *buf, int used,
1192                 unsigned int last_render)
1193 {
1194         drm_i810_private_t *dev_priv = dev->dev_private;
1195         drm_i810_buf_priv_t *buf_priv = buf->dev_private;
1196         drm_i810_sarea_t *sarea_priv = dev_priv->sarea_priv;
1197         unsigned long address = (unsigned long)buf->bus_address;
1198         unsigned long start = address - dev->agp->base;
1199         int u;
1200         RING_LOCALS;
1201
1202         i810_kernel_lost_context(dev);
1203
1204         u = cmpxchg(buf_priv->in_use, I810_BUF_CLIENT,
1205                 I810_BUF_HARDWARE);
1206         if (u != I810_BUF_CLIENT) {
1207                 DRM_DEBUG("MC found buffer that isn't mine!\n");
1208         }
1209
1210         if (used > 4*1024)
1211                 used = 0;
1212
1213         sarea_priv->dirty = 0x7f;
1214
1215         DRM_DEBUG("dispatch mc addr 0x%lx, used 0x%x\n",
1216                 address, used);
1217
1218         dev_priv->counter++;
1219         DRM_DEBUG("dispatch counter : %ld\n", dev_priv->counter);
1220         DRM_DEBUG("i810_dma_dispatch_mc\n");
1221         DRM_DEBUG("start : %lx\n", start);
1222         DRM_DEBUG("used : %d\n", used);
1223         DRM_DEBUG("start + used - 4 : %ld\n", start + used - 4);
1224
1225         if (buf_priv->currently_mapped == I810_BUF_MAPPED) {
1226                 if (used & 4) {
1227                         *(u32 *)((u32)buf_priv->virtual + used) = 0;
1228                         used += 4;
1229                 }
1230
1231                 i810_unmap_buffer(buf);
1232         }
1233         BEGIN_LP_RING(4);
1234         OUT_RING( CMD_OP_BATCH_BUFFER );
1235         OUT_RING( start | BB1_PROTECTED );
1236         OUT_RING( start + used - 4 );
1237         OUT_RING( 0 );
1238         ADVANCE_LP_RING();
1239
1240
1241         BEGIN_LP_RING(8);
1242         OUT_RING( CMD_STORE_DWORD_IDX );
1243         OUT_RING( buf_priv->my_use_idx );
1244         OUT_RING( I810_BUF_FREE );
1245         OUT_RING( 0 );
1246
1247         OUT_RING( CMD_STORE_DWORD_IDX );
1248         OUT_RING( 16 );
1249         OUT_RING( last_render );
1250         OUT_RING( 0 );
1251         ADVANCE_LP_RING();
1252 }
1253
1254 int i810_dma_mc(struct inode *inode, struct file *filp,
1255         unsigned int cmd, unsigned long arg)
1256 {
1257         drm_file_t *priv = filp->private_data;
1258         drm_device_t *dev = priv->dev;
1259         drm_device_dma_t *dma = dev->dma;
1260         drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;
1261         u32 *hw_status = dev_priv->hw_status_page;
1262         drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
1263                 dev_priv->sarea_priv;
1264         drm_i810_mc_t mc;
1265
1266         if (copy_from_user(&mc, (drm_i810_mc_t *)arg, sizeof(mc)))
1267                 return -EFAULT;
1268
1269
1270         if (!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
1271                 DRM_ERROR("i810_dma_mc called without lock held\n");
1272                 return -EINVAL;
1273         }
1274
1275         if (mc.idx >= dma->buf_count || mc.idx < 0)
1276                 return -EINVAL;
1277
1278         i810_dma_dispatch_mc(dev, dma->buflist[mc.idx], mc.used,
1279                 mc.last_render );
1280
1281         atomic_add(mc.used, &dev->counts[_DRM_STAT_SECONDARY]);
1282         atomic_inc(&dev->counts[_DRM_STAT_DMA]);
1283         sarea_priv->last_enqueue = dev_priv->counter-1;
1284         sarea_priv->last_dispatch = (int) hw_status[5];
1285
1286         return 0;
1287 }
1288
1289 int i810_rstatus(struct inode *inode, struct file *filp,
1290                 unsigned int cmd, unsigned long arg)
1291 {
1292         drm_file_t *priv = filp->private_data;
1293         drm_device_t *dev = priv->dev;
1294         drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;
1295
1296         return (int)(((u32 *)(dev_priv->hw_status_page))[4]);
1297 }
1298
1299 int i810_ov0_info(struct inode *inode, struct file *filp,
1300                 unsigned int cmd, unsigned long arg)
1301 {
1302         drm_file_t *priv = filp->private_data;
1303         drm_device_t *dev = priv->dev;
1304         drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;
1305         drm_i810_overlay_t data;
1306
1307         data.offset = dev_priv->overlay_offset;
1308         data.physical = dev_priv->overlay_physical;
1309         if (copy_to_user((drm_i810_overlay_t *)arg,&data,sizeof(data)))
1310                 return -EFAULT;
1311         return 0;
1312 }
1313
1314 int i810_fstatus(struct inode *inode, struct file *filp,
1315                 unsigned int cmd, unsigned long arg)
1316 {
1317         drm_file_t *priv = filp->private_data;
1318         drm_device_t *dev = priv->dev;
1319         drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;
1320
1321         if (!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
1322                 DRM_ERROR("i810_fstatus called without lock held\n");
1323                 return -EINVAL;
1324         }
1325         return I810_READ(0x30008);
1326 }
1327
1328 int i810_ov0_flip(struct inode *inode, struct file *filp,
1329                 unsigned int cmd, unsigned long arg)
1330 {
1331         drm_file_t *priv = filp->private_data;
1332         drm_device_t *dev = priv->dev;
1333         drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;
1334
1335         if (!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
1336                 DRM_ERROR("i810_ov0_flip called without lock held\n");
1337                 return -EINVAL;
1338         }
1339
1340         //Tell the overlay to update
1341         I810_WRITE(0x30000,dev_priv->overlay_physical | 0x80000000);
1342
1343         return 0;
1344 }
1345
1346
1347 /* Not sure why this isn't set all the time:
1348  */
1349 static void i810_do_init_pageflip( drm_device_t *dev )
1350 {
1351         drm_i810_private_t *dev_priv = dev->dev_private;
1352
1353         DRM_DEBUG("%s\n", __FUNCTION__);
1354         dev_priv->page_flipping = 1;
1355         dev_priv->current_page = 0;
1356         dev_priv->sarea_priv->pf_current_page = dev_priv->current_page;
1357 }
1358
1359 int i810_do_cleanup_pageflip( drm_device_t *dev )
1360 {
1361         drm_i810_private_t *dev_priv = dev->dev_private;
1362
1363         DRM_DEBUG("%s\n", __FUNCTION__);
1364         if (dev_priv->current_page != 0)
1365                 i810_dma_dispatch_flip( dev );
1366
1367         dev_priv->page_flipping = 0;
1368         return 0;
1369 }
1370
1371 int i810_flip_bufs(struct inode *inode, struct file *filp,
1372                    unsigned int cmd, unsigned long arg)
1373 {
1374         drm_file_t *priv = filp->private_data;
1375         drm_device_t *dev = priv->dev;
1376         drm_i810_private_t *dev_priv = dev->dev_private;
1377
1378         DRM_DEBUG("%s\n", __FUNCTION__);
1379
1380         if (!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
1381                 DRM_ERROR("i810_flip_buf called without lock held\n");
1382                 return -EINVAL;
1383         }
1384
1385         if (!dev_priv->page_flipping)
1386                 i810_do_init_pageflip( dev );
1387
1388         i810_dma_dispatch_flip( dev );
1389         return 0;
1390 }