drivers/char/drm/i810_dma.c

   1 /* i810_dma.c -- DMA support for the i810 -*- linux-c -*-
   2  * Created: Mon Dec 13 01:50:01 1999 by jhartmann@precisioninsight.com
   3  *
   4  * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
   5  * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
   6  * All Rights Reserved.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice (including the next
  16  * paragraph) shall be included in all copies or substantial portions of the
  17  * Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  20  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  22  * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  23  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  24  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  25  * DEALINGS IN THE SOFTWARE.
  26  *
  27  * Authors: Rickard E. (Rik) Faith <faith@valinux.com>
  28  *          Jeff Hartmann <jhartmann@valinux.com>
  29  *          Keith Whitwell <keith@tungstengraphics.com>
  30  *
  31  */
  32
  33 #include "drmP.h"
  34 #include "drm.h"
  35 #include "i810_drm.h"
  36 #include "i810_drv.h"
  37 #include <linux/interrupt.h>    /* For task queue support */
  38 #include <linux/delay.h>
  39 #include <linux/pagemap.h>
  40
  41 #define I810_BUF_FREE           2
  42 #define I810_BUF_CLIENT         1
  43 #define I810_BUF_HARDWARE       0
  44
  45 #define I810_BUF_UNMAPPED 0
  46 #define I810_BUF_MAPPED   1
  47
  48 static drm_buf_t *i810_freelist_get(drm_device_t * dev)
  49 {
  50         drm_device_dma_t *dma = dev->dma;
  51         int i;
  52         int used;
  53
  54         /* Linear search might not be the best solution */
  55
  56         for (i = 0; i < dma->buf_count; i++) {
  57                 drm_buf_t *buf = dma->buflist[i];
  58                 drm_i810_buf_priv_t *buf_priv = buf->dev_private;
  59                 /* In use is already a pointer */
  60                 used = cmpxchg(buf_priv->in_use, I810_BUF_FREE,
  61                                I810_BUF_CLIENT);
  62                 if (used == I810_BUF_FREE) {
  63                         return buf;
  64                 }
  65         }
  66         return NULL;
  67 }
  68
  69 /* This should only be called if the buffer is not sent to the hardware
  70  * yet, the hardware updates in use for us once its on the ring buffer.
  71  */
  72
  73 static int i810_freelist_put(drm_device_t * dev, drm_buf_t * buf)
  74 {
  75         drm_i810_buf_priv_t *buf_priv = buf->dev_private;
  76         int used;
  77
  78         /* In use is already a pointer */
  79         used = cmpxchg(buf_priv->in_use, I810_BUF_CLIENT, I810_BUF_FREE);
  80         if (used != I810_BUF_CLIENT) {
  81                 DRM_ERROR("Freeing buffer thats not in use : %d\n", buf->idx);
  82                 return -EINVAL;
  83         }
  84
  85         return 0;
  86 }
  87
  88 static int i810_mmap_buffers(struct file *filp, struct vm_area_struct *vma)
  89 {
  90         drm_file_t *priv = filp->private_data;
  91         drm_device_t *dev;
  92         drm_i810_private_t *dev_priv;
  93         drm_buf_t *buf;
  94         drm_i810_buf_priv_t *buf_priv;
  95
  96         lock_kernel();
  97         dev = priv->head->dev;
  98         dev_priv = dev->dev_private;
  99         buf = dev_priv->mmap_buffer;
 100         buf_priv = buf->dev_private;
 101
 102         vma->vm_flags |= (VM_IO | VM_DONTCOPY);
 103         vma->vm_file = filp;
 104
 105         buf_priv->currently_mapped = I810_BUF_MAPPED;
 106         unlock_kernel();
 107
 108         if (io_remap_pfn_range(vma, vma->vm_start,
 109                                vma->vm_pgoff,
 110                                vma->vm_end - vma->vm_start, vma->vm_page_prot))
 111                 return -EAGAIN;
 112         return 0;
 113 }
 114
 115 static const struct file_operations i810_buffer_fops = {
 116         .open = drm_open,
 117         .release = drm_release,
 118         .ioctl = drm_ioctl,
 119         .mmap = i810_mmap_buffers,
 120         .fasync = drm_fasync,
 121 };
 122
 123 static int i810_map_buffer(drm_buf_t * buf, struct file *filp)
 124 {
 125         drm_file_t *priv = filp->private_data;
 126         drm_device_t *dev = priv->head->dev;
 127         drm_i810_buf_priv_t *buf_priv = buf->dev_private;
 128         drm_i810_private_t *dev_priv = dev->dev_private;
 129         const struct file_operations *old_fops;
 130         int retcode = 0;
 131
 132         if (buf_priv->currently_mapped == I810_BUF_MAPPED)
 133                 return -EINVAL;
 134
 135         down_write(&current->mm->mmap_sem);
 136         old_fops = filp->f_op;
 137         filp->f_op = &i810_buffer_fops;
 138         dev_priv->mmap_buffer = buf;
 139         buf_priv->virtual = (void *)do_mmap(filp, 0, buf->total,
 140                                             PROT_READ | PROT_WRITE,
 141                                             MAP_SHARED, buf->bus_address);
 142         dev_priv->mmap_buffer = NULL;
 143         filp->f_op = old_fops;
 144         if (IS_ERR(buf_priv->virtual)) {
 145                 /* Real error */
 146                 DRM_ERROR("mmap error\n");
 147                 retcode = PTR_ERR(buf_priv->virtual);
 148                 buf_priv->virtual = NULL;
 149         }
 150         up_write(&current->mm->mmap_sem);
 151
 152         return retcode;
 153 }
 154
 155 static int i810_unmap_buffer(drm_buf_t * buf)
 156 {
 157         drm_i810_buf_priv_t *buf_priv = buf->dev_private;
 158         int retcode = 0;
 159
 160         if (buf_priv->currently_mapped != I810_BUF_MAPPED)
 161                 return -EINVAL;
 162
 163         down_write(&current->mm->mmap_sem);
 164         retcode = do_munmap(current->mm,
 165                             (unsigned long)buf_priv->virtual,
 166                             (size_t) buf->total);
 167         up_write(&current->mm->mmap_sem);
 168
 169         buf_priv->currently_mapped = I810_BUF_UNMAPPED;
 170         buf_priv->virtual = NULL;
 171
 172         return retcode;
 173 }
 174
 175 static int i810_dma_get_buffer(drm_device_t * dev, drm_i810_dma_t * d,
 176                                struct file *filp)
 177 {
 178         drm_buf_t *buf;
 179         drm_i810_buf_priv_t *buf_priv;
 180         int retcode = 0;
 181
 182         buf = i810_freelist_get(dev);
 183         if (!buf) {
 184                 retcode = -ENOMEM;
 185                 DRM_DEBUG("retcode=%d\n", retcode);
 186                 return retcode;
 187         }
 188
 189         retcode = i810_map_buffer(buf, filp);
 190         if (retcode) {
 191                 i810_freelist_put(dev, buf);
 192                 DRM_ERROR("mapbuf failed, retcode %d\n", retcode);
 193                 return retcode;
 194         }
 195         buf->filp = filp;
 196         buf_priv = buf->dev_private;
 197         d->granted = 1;
 198         d->request_idx = buf->idx;
 199         d->request_size = buf->total;
 200         d->virtual = buf_priv->virtual;
 201
 202         return retcode;
 203 }
 204
 205 static int i810_dma_cleanup(drm_device_t * dev)
 206 {
 207         drm_device_dma_t *dma = dev->dma;
 208
 209         /* Make sure interrupts are disabled here because the uninstall ioctl
 210          * may not have been called from userspace and after dev_private
 211          * is freed, it's too late.
 212          */
 213         if (drm_core_check_feature(dev, DRIVER_HAVE_IRQ) && dev->irq_enabled)
 214                 drm_irq_uninstall(dev);
 215
 216         if (dev->dev_private) {
 217                 int i;
 218                 drm_i810_private_t *dev_priv =
 219                     (drm_i810_private_t *) dev->dev_private;
 220
 221                 if (dev_priv->ring.virtual_start) {
 222                         drm_core_ioremapfree(&dev_priv->ring.map, dev);
 223                 }
 224                 if (dev_priv->hw_status_page) {
 225                         pci_free_consistent(dev->pdev, PAGE_SIZE,
 226                                             dev_priv->hw_status_page,
 227                                             dev_priv->dma_status_page);
 228                         /* Need to rewrite hardware status page */
 229                         I810_WRITE(0x02080, 0x1ffff000);
 230                 }
 231                 drm_free(dev->dev_private, sizeof(drm_i810_private_t),
 232                          DRM_MEM_DRIVER);
 233                 dev->dev_private = NULL;
 234
 235                 for (i = 0; i < dma->buf_count; i++) {
 236                         drm_buf_t *buf = dma->buflist[i];
 237                         drm_i810_buf_priv_t *buf_priv = buf->dev_private;
 238
 239                         if (buf_priv->kernel_virtual && buf->total)
 240                                 drm_core_ioremapfree(&buf_priv->map, dev);
 241                 }
 242         }
 243         return 0;
 244 }
 245
 246 static int i810_wait_ring(drm_device_t * dev, int n)
 247 {
 248         drm_i810_private_t *dev_priv = dev->dev_private;
 249         drm_i810_ring_buffer_t *ring = &(dev_priv->ring);
 250         int iters = 0;
 251         unsigned long end;
 252         unsigned int last_head = I810_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
 253
 254         end = jiffies + (HZ * 3);
 255         while (ring->space < n) {
 256                 ring->head = I810_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
 257                 ring->space = ring->head - (ring->tail + 8);
 258                 if (ring->space < 0)
 259                         ring->space += ring->Size;
 260
 261                 if (ring->head != last_head) {
 262                         end = jiffies + (HZ * 3);
 263                         last_head = ring->head;
 264                 }
 265
 266                 iters++;
 267                 if (time_before(end, jiffies)) {
 268                         DRM_ERROR("space: %d wanted %d\n", ring->space, n);
 269                         DRM_ERROR("lockup\n");
 270                         goto out_wait_ring;
 271                 }
 272                 udelay(1);
 273         }
 274
 275       out_wait_ring:
 276         return iters;
 277 }
 278
 279 static void i810_kernel_lost_context(drm_device_t * dev)
 280 {
 281         drm_i810_private_t *dev_priv = dev->dev_private;
 282         drm_i810_ring_buffer_t *ring = &(dev_priv->ring);
 283
 284         ring->head = I810_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
 285         ring->tail = I810_READ(LP_RING + RING_TAIL);
 286         ring->space = ring->head - (ring->tail + 8);
 287         if (ring->space < 0)
 288                 ring->space += ring->Size;
 289 }
 290
 291 static int i810_freelist_init(drm_device_t * dev, drm_i810_private_t * dev_priv)
 292 {
 293         drm_device_dma_t *dma = dev->dma;
 294         int my_idx = 24;
 295         u32 *hw_status = (u32 *) (dev_priv->hw_status_page + my_idx);
 296         int i;
 297
 298         if (dma->buf_count > 1019) {
 299                 /* Not enough space in the status page for the freelist */
 300                 return -EINVAL;
 301         }
 302
 303         for (i = 0; i < dma->buf_count; i++) {
 304                 drm_buf_t *buf = dma->buflist[i];
 305                 drm_i810_buf_priv_t *buf_priv = buf->dev_private;
 306
 307                 buf_priv->in_use = hw_status++;
 308                 buf_priv->my_use_idx = my_idx;
 309                 my_idx += 4;
 310
 311                 *buf_priv->in_use = I810_BUF_FREE;
 312
 313                 buf_priv->map.offset = buf->bus_address;
 314                 buf_priv->map.size = buf->total;
 315                 buf_priv->map.type = _DRM_AGP;
 316                 buf_priv->map.flags = 0;
 317                 buf_priv->map.mtrr = 0;
 318
 319                 drm_core_ioremap(&buf_priv->map, dev);
 320                 buf_priv->kernel_virtual = buf_priv->map.handle;
 321
 322         }
 323         return 0;
 324 }
 325
 326 static int i810_dma_initialize(drm_device_t * dev,
 327                                drm_i810_private_t * dev_priv,
 328                                drm_i810_init_t * init)
 329 {
 330         struct list_head *list;
 331
 332         memset(dev_priv, 0, sizeof(drm_i810_private_t));
 333
 334         list_for_each(list, &dev->maplist->head) {
 335                 drm_map_list_t *r_list = list_entry(list, drm_map_list_t, head);
 336                 if (r_list->map &&
 337                     r_list->map->type == _DRM_SHM &&
 338                     r_list->map->flags & _DRM_CONTAINS_LOCK) {
 339                         dev_priv->sarea_map = r_list->map;
 340                         break;
 341                 }
 342         }
 343         if (!dev_priv->sarea_map) {
 344                 dev->dev_private = (void *)dev_priv;
 345                 i810_dma_cleanup(dev);
 346                 DRM_ERROR("can not find sarea!\n");
 347                 return -EINVAL;
 348         }
 349         dev_priv->mmio_map = drm_core_findmap(dev, init->mmio_offset);
 350         if (!dev_priv->mmio_map) {
 351                 dev->dev_private = (void *)dev_priv;
 352                 i810_dma_cleanup(dev);
 353                 DRM_ERROR("can not find mmio map!\n");
 354                 return -EINVAL;
 355         }
 356         dev->agp_buffer_token = init->buffers_offset;
 357         dev->agp_buffer_map = drm_core_findmap(dev, init->buffers_offset);
 358         if (!dev->agp_buffer_map) {
 359                 dev->dev_private = (void *)dev_priv;
 360                 i810_dma_cleanup(dev);
 361                 DRM_ERROR("can not find dma buffer map!\n");
 362                 return -EINVAL;
 363         }
 364
 365         dev_priv->sarea_priv = (drm_i810_sarea_t *)
 366             ((u8 *) dev_priv->sarea_map->handle + init->sarea_priv_offset);
 367
 368         dev_priv->ring.Start = init->ring_start;
 369         dev_priv->ring.End = init->ring_end;
 370         dev_priv->ring.Size = init->ring_size;
 371
 372         dev_priv->ring.map.offset = dev->agp->base + init->ring_start;
 373         dev_priv->ring.map.size = init->ring_size;
 374         dev_priv->ring.map.type = _DRM_AGP;
 375         dev_priv->ring.map.flags = 0;
 376         dev_priv->ring.map.mtrr = 0;
 377
 378         drm_core_ioremap(&dev_priv->ring.map, dev);
 379
 380         if (dev_priv->ring.map.handle == NULL) {
 381                 dev->dev_private = (void *)dev_priv;
 382                 i810_dma_cleanup(dev);
 383                 DRM_ERROR("can not ioremap virtual address for"
 384                           " ring buffer\n");
 385                 return DRM_ERR(ENOMEM);
 386         }
 387
 388         dev_priv->ring.virtual_start = dev_priv->ring.map.handle;
 389
 390         dev_priv->ring.tail_mask = dev_priv->ring.Size - 1;
 391
 392         dev_priv->w = init->w;
 393         dev_priv->h = init->h;
 394         dev_priv->pitch = init->pitch;
 395         dev_priv->back_offset = init->back_offset;
 396         dev_priv->depth_offset = init->depth_offset;
 397         dev_priv->front_offset = init->front_offset;
 398
 399         dev_priv->overlay_offset = init->overlay_offset;
 400         dev_priv->overlay_physical = init->overlay_physical;
 401
 402         dev_priv->front_di1 = init->front_offset | init->pitch_bits;
 403         dev_priv->back_di1 = init->back_offset | init->pitch_bits;
 404         dev_priv->zi1 = init->depth_offset | init->pitch_bits;
 405
 406         /* Program Hardware Status Page */
 407         dev_priv->hw_status_page =
 408             pci_alloc_consistent(dev->pdev, PAGE_SIZE,
 409                                  &dev_priv->dma_status_page);
 410         if (!dev_priv->hw_status_page) {
 411                 dev->dev_private = (void *)dev_priv;
 412                 i810_dma_cleanup(dev);
 413                 DRM_ERROR("Can not allocate hardware status page\n");
 414                 return -ENOMEM;
 415         }
 416         memset(dev_priv->hw_status_page, 0, PAGE_SIZE);
 417         DRM_DEBUG("hw status page @ %p\n", dev_priv->hw_status_page);
 418
 419         I810_WRITE(0x02080, dev_priv->dma_status_page);
 420         DRM_DEBUG("Enabled hardware status page\n");
 421
 422         /* Now we need to init our freelist */
 423         if (i810_freelist_init(dev, dev_priv) != 0) {
 424                 dev->dev_private = (void *)dev_priv;
 425                 i810_dma_cleanup(dev);
 426                 DRM_ERROR("Not enough space in the status page for"
 427                           " the freelist\n");
 428                 return -ENOMEM;
 429         }
 430         dev->dev_private = (void *)dev_priv;
 431
 432         return 0;
 433 }
 434
 435 /* i810 DRM version 1.1 used a smaller init structure with different
 436  * ordering of values than is currently used (drm >= 1.2). There is
 437  * no defined way to detect the XFree version to correct this problem,
 438  * however by checking using this procedure we can detect the correct
 439  * thing to do.
 440  *
 441  * #1 Read the Smaller init structure from user-space
 442  * #2 Verify the overlay_physical is a valid physical address, or NULL
 443  *    If it isn't then we have a v1.1 client. Fix up params.
 444  *    If it is, then we have a 1.2 client... get the rest of the data.
 445  */
 446 static int i810_dma_init_compat(drm_i810_init_t * init, unsigned long arg)
 447 {
 448
 449         /* Get v1.1 init data */
 450         if (copy_from_user(init, (drm_i810_pre12_init_t __user *) arg,
 451                            sizeof(drm_i810_pre12_init_t))) {
 452                 return -EFAULT;
 453         }
 454
 455         if ((!init->overlay_physical) || (init->overlay_physical > 4096)) {
 456
 457                 /* This is a v1.2 client, just get the v1.2 init data */
 458                 DRM_INFO("Using POST v1.2 init.\n");
 459                 if (copy_from_user(init, (drm_i810_init_t __user *) arg,
 460                                    sizeof(drm_i810_init_t))) {
 461                         return -EFAULT;
 462                 }
 463         } else {
 464
 465                 /* This is a v1.1 client, fix the params */
 466                 DRM_INFO("Using PRE v1.2 init.\n");
 467                 init->pitch_bits = init->h;
 468                 init->pitch = init->w;
 469                 init->h = init->overlay_physical;
 470                 init->w = init->overlay_offset;
 471                 init->overlay_physical = 0;
 472                 init->overlay_offset = 0;
 473         }
 474
 475         return 0;
 476 }
 477
 478 static int i810_dma_init(struct inode *inode, struct file *filp,
 479                          unsigned int cmd, unsigned long arg)
 480 {
 481         drm_file_t *priv = filp->private_data;
 482         drm_device_t *dev = priv->head->dev;
 483         drm_i810_private_t *dev_priv;
 484         drm_i810_init_t init;
 485         int retcode = 0;
 486
 487         /* Get only the init func */
 488         if (copy_from_user
 489             (&init, (void __user *)arg, sizeof(drm_i810_init_func_t)))
 490                 return -EFAULT;
 491
 492         switch (init.func) {
 493         case I810_INIT_DMA:
 494                 /* This case is for backward compatibility. It
 495                  * handles XFree 4.1.0 and 4.2.0, and has to
 496                  * do some parameter checking as described below.
 497                  * It will someday go away.
 498                  */
 499                 retcode = i810_dma_init_compat(&init, arg);
 500                 if (retcode)
 501                         return retcode;
 502
 503                 dev_priv = drm_alloc(sizeof(drm_i810_private_t),
 504                                      DRM_MEM_DRIVER);
 505                 if (dev_priv == NULL)
 506                         return -ENOMEM;
 507                 retcode = i810_dma_initialize(dev, dev_priv, &init);
 508                 break;
 509
 510         default:
 511         case I810_INIT_DMA_1_4:
 512                 DRM_INFO("Using v1.4 init.\n");
 513                 if (copy_from_user(&init, (drm_i810_init_t __user *) arg,
 514                                    sizeof(drm_i810_init_t))) {
 515                         return -EFAULT;
 516                 }
 517                 dev_priv = drm_alloc(sizeof(drm_i810_private_t),
 518                                      DRM_MEM_DRIVER);
 519                 if (dev_priv == NULL)
 520                         return -ENOMEM;
 521                 retcode = i810_dma_initialize(dev, dev_priv, &init);
 522                 break;
 523
 524         case I810_CLEANUP_DMA:
 525                 DRM_INFO("DMA Cleanup\n");
 526                 retcode = i810_dma_cleanup(dev);
 527                 break;
 528         }
 529
 530         return retcode;
 531 }
 532
 533 /* Most efficient way to verify state for the i810 is as it is
 534  * emitted.  Non-conformant state is silently dropped.
 535  *
 536  * Use 'volatile' & local var tmp to force the emitted values to be
 537  * identical to the verified ones.
 538  */
 539 static void i810EmitContextVerified(drm_device_t * dev,
 540                                     volatile unsigned int *code)
 541 {
 542         drm_i810_private_t *dev_priv = dev->dev_private;
 543         int i, j = 0;
 544         unsigned int tmp;
 545         RING_LOCALS;
 546
 547         BEGIN_LP_RING(I810_CTX_SETUP_SIZE);
 548
 549         OUT_RING(GFX_OP_COLOR_FACTOR);
 550         OUT_RING(code[I810_CTXREG_CF1]);
 551
 552         OUT_RING(GFX_OP_STIPPLE);
 553         OUT_RING(code[I810_CTXREG_ST1]);
 554
 555         for (i = 4; i < I810_CTX_SETUP_SIZE; i++) {
 556                 tmp = code[i];
 557
 558                 if ((tmp & (7 << 29)) == (3 << 29) &&
 559                     (tmp & (0x1f << 24)) < (0x1d << 24)) {
 560                         OUT_RING(tmp);
 561                         j++;
 562                 } else
 563                         printk("constext state dropped!!!\n");
 564         }
 565
 566         if (j & 1)
 567                 OUT_RING(0);
 568
 569         ADVANCE_LP_RING();
 570 }
 571
 572 static void i810EmitTexVerified(drm_device_t * dev, volatile unsigned int *code)
 573 {
 574         drm_i810_private_t *dev_priv = dev->dev_private;
 575         int i, j = 0;
 576         unsigned int tmp;
 577         RING_LOCALS;
 578
 579         BEGIN_LP_RING(I810_TEX_SETUP_SIZE);
 580
 581         OUT_RING(GFX_OP_MAP_INFO);
 582         OUT_RING(code[I810_TEXREG_MI1]);
 583         OUT_RING(code[I810_TEXREG_MI2]);
 584         OUT_RING(code[I810_TEXREG_MI3]);
 585
 586         for (i = 4; i < I810_TEX_SETUP_SIZE; i++) {
 587                 tmp = code[i];
 588
 589                 if ((tmp & (7 << 29)) == (3 << 29) &&
 590                     (tmp & (0x1f << 24)) < (0x1d << 24)) {
 591                         OUT_RING(tmp);
 592                         j++;
 593                 } else
 594                         printk("texture state dropped!!!\n");
 595         }
 596
 597         if (j & 1)
 598                 OUT_RING(0);
 599
 600         ADVANCE_LP_RING();
 601 }
 602
 603 /* Need to do some additional checking when setting the dest buffer.
 604  */
 605 static void i810EmitDestVerified(drm_device_t * dev,
 606                                  volatile unsigned int *code)
 607 {
 608         drm_i810_private_t *dev_priv = dev->dev_private;
 609         unsigned int tmp;
 610         RING_LOCALS;
 611
 612         BEGIN_LP_RING(I810_DEST_SETUP_SIZE + 2);
 613
 614         tmp = code[I810_DESTREG_DI1];
 615         if (tmp == dev_priv->front_di1 || tmp == dev_priv->back_di1) {
 616                 OUT_RING(CMD_OP_DESTBUFFER_INFO);
 617                 OUT_RING(tmp);
 618         } else
 619                 DRM_DEBUG("bad di1 %x (allow %x or %x)\n",
 620                           tmp, dev_priv->front_di1, dev_priv->back_di1);
 621
 622         /* invarient:
 623          */
 624         OUT_RING(CMD_OP_Z_BUFFER_INFO);
 625         OUT_RING(dev_priv->zi1);
 626
 627         OUT_RING(GFX_OP_DESTBUFFER_VARS);
 628         OUT_RING(code[I810_DESTREG_DV1]);
 629
 630         OUT_RING(GFX_OP_DRAWRECT_INFO);
 631         OUT_RING(code[I810_DESTREG_DR1]);
 632         OUT_RING(code[I810_DESTREG_DR2]);
 633         OUT_RING(code[I810_DESTREG_DR3]);
 634         OUT_RING(code[I810_DESTREG_DR4]);
 635         OUT_RING(0);
 636
 637         ADVANCE_LP_RING();
 638 }
 639
 640 static void i810EmitState(drm_device_t * dev)
 641 {
 642         drm_i810_private_t *dev_priv = dev->dev_private;
 643         drm_i810_sarea_t *sarea_priv = dev_priv->sarea_priv;
 644         unsigned int dirty = sarea_priv->dirty;
 645
 646         DRM_DEBUG("%s %x\n", __FUNCTION__, dirty);
 647
 648         if (dirty & I810_UPLOAD_BUFFERS) {
 649                 i810EmitDestVerified(dev, sarea_priv->BufferState);
 650                 sarea_priv->dirty &= ~I810_UPLOAD_BUFFERS;
 651         }
 652
 653         if (dirty & I810_UPLOAD_CTX) {
 654                 i810EmitContextVerified(dev, sarea_priv->ContextState);
 655                 sarea_priv->dirty &= ~I810_UPLOAD_CTX;
 656         }
 657
 658         if (dirty & I810_UPLOAD_TEX0) {
 659                 i810EmitTexVerified(dev, sarea_priv->TexState[0]);
 660                 sarea_priv->dirty &= ~I810_UPLOAD_TEX0;
 661         }
 662
 663         if (dirty & I810_UPLOAD_TEX1) {
 664                 i810EmitTexVerified(dev, sarea_priv->TexState[1]);
 665                 sarea_priv->dirty &= ~I810_UPLOAD_TEX1;
 666         }
 667 }
 668
 669 /* need to verify
 670  */
 671 static void i810_dma_dispatch_clear(drm_device_t * dev, int flags,
 672                                     unsigned int clear_color,
 673                                     unsigned int clear_zval)
 674 {
 675         drm_i810_private_t *dev_priv = dev->dev_private;
 676         drm_i810_sarea_t *sarea_priv = dev_priv->sarea_priv;
 677         int nbox = sarea_priv->nbox;
 678         drm_clip_rect_t *pbox = sarea_priv->boxes;
 679         int pitch = dev_priv->pitch;
 680         int cpp = 2;
 681         int i;
 682         RING_LOCALS;
 683
 684         if (dev_priv->current_page == 1) {
 685                 unsigned int tmp = flags;
 686
 687                 flags &= ~(I810_FRONT | I810_BACK);
 688                 if (tmp & I810_FRONT)
 689                         flags |= I810_BACK;
 690                 if (tmp & I810_BACK)
 691                         flags |= I810_FRONT;
 692         }
 693
 694         i810_kernel_lost_context(dev);
 695
 696         if (nbox > I810_NR_SAREA_CLIPRECTS)
 697                 nbox = I810_NR_SAREA_CLIPRECTS;
 698
 699         for (i = 0; i < nbox; i++, pbox++) {
 700                 unsigned int x = pbox->x1;
 701                 unsigned int y = pbox->y1;
 702                 unsigned int width = (pbox->x2 - x) * cpp;
 703                 unsigned int height = pbox->y2 - y;
 704                 unsigned int start = y * pitch + x * cpp;
 705
 706                 if (pbox->x1 > pbox->x2 ||
 707                     pbox->y1 > pbox->y2 ||
 708                     pbox->x2 > dev_priv->w || pbox->y2 > dev_priv->h)
 709                         continue;
 710
 711                 if (flags & I810_FRONT) {
 712                         BEGIN_LP_RING(6);
 713                         OUT_RING(BR00_BITBLT_CLIENT | BR00_OP_COLOR_BLT | 0x3);
 714                         OUT_RING(BR13_SOLID_PATTERN | (0xF0 << 16) | pitch);
 715                         OUT_RING((height << 16) | width);
 716                         OUT_RING(start);
 717                         OUT_RING(clear_color);
 718                         OUT_RING(0);
 719                         ADVANCE_LP_RING();
 720                 }
 721
 722                 if (flags & I810_BACK) {
 723                         BEGIN_LP_RING(6);
 724                         OUT_RING(BR00_BITBLT_CLIENT | BR00_OP_COLOR_BLT | 0x3);
 725                         OUT_RING(BR13_SOLID_PATTERN | (0xF0 << 16) | pitch);
 726                         OUT_RING((height << 16) | width);
 727                         OUT_RING(dev_priv->back_offset + start);
 728                         OUT_RING(clear_color);
 729                         OUT_RING(0);
 730                         ADVANCE_LP_RING();
 731                 }
 732
 733                 if (flags & I810_DEPTH) {
 734                         BEGIN_LP_RING(6);
 735                         OUT_RING(BR00_BITBLT_CLIENT | BR00_OP_COLOR_BLT | 0x3);
 736                         OUT_RING(BR13_SOLID_PATTERN | (0xF0 << 16) | pitch);
 737                         OUT_RING((height << 16) | width);
 738                         OUT_RING(dev_priv->depth_offset + start);
 739                         OUT_RING(clear_zval);
 740                         OUT_RING(0);
 741                         ADVANCE_LP_RING();
 742                 }
 743         }
 744 }
 745
 746 static void i810_dma_dispatch_swap(drm_device_t * dev)
 747 {
 748         drm_i810_private_t *dev_priv = dev->dev_private;
 749         drm_i810_sarea_t *sarea_priv = dev_priv->sarea_priv;
 750         int nbox = sarea_priv->nbox;
 751         drm_clip_rect_t *pbox = sarea_priv->boxes;
 752         int pitch = dev_priv->pitch;
 753         int cpp = 2;
 754         int i;
 755         RING_LOCALS;
 756
 757         DRM_DEBUG("swapbuffers\n");
 758
 759         i810_kernel_lost_context(dev);
 760
 761         if (nbox > I810_NR_SAREA_CLIPRECTS)
 762                 nbox = I810_NR_SAREA_CLIPRECTS;
 763
 764         for (i = 0; i < nbox; i++, pbox++) {
 765                 unsigned int w = pbox->x2 - pbox->x1;
 766                 unsigned int h = pbox->y2 - pbox->y1;
 767                 unsigned int dst = pbox->x1 * cpp + pbox->y1 * pitch;
 768                 unsigned int start = dst;
 769
 770                 if (pbox->x1 > pbox->x2 ||
 771                     pbox->y1 > pbox->y2 ||
 772                     pbox->x2 > dev_priv->w || pbox->y2 > dev_priv->h)
 773                         continue;
 774
 775                 BEGIN_LP_RING(6);
 776                 OUT_RING(BR00_BITBLT_CLIENT | BR00_OP_SRC_COPY_BLT | 0x4);
 777                 OUT_RING(pitch | (0xCC << 16));
 778                 OUT_RING((h << 16) | (w * cpp));
 779                 if (dev_priv->current_page == 0)
 780                         OUT_RING(dev_priv->front_offset + start);
 781                 else
 782                         OUT_RING(dev_priv->back_offset + start);
 783                 OUT_RING(pitch);
 784                 if (dev_priv->current_page == 0)
 785                         OUT_RING(dev_priv->back_offset + start);
 786                 else
 787                         OUT_RING(dev_priv->front_offset + start);
 788                 ADVANCE_LP_RING();
 789         }
 790 }
 791
 792 static void i810_dma_dispatch_vertex(drm_device_t * dev,
 793                                      drm_buf_t * buf, int discard, int used)
 794 {
 795         drm_i810_private_t *dev_priv = dev->dev_private;
 796         drm_i810_buf_priv_t *buf_priv = buf->dev_private;
 797         drm_i810_sarea_t *sarea_priv = dev_priv->sarea_priv;
 798         drm_clip_rect_t *box = sarea_priv->boxes;
 799         int nbox = sarea_priv->nbox;
 800         unsigned long address = (unsigned long)buf->bus_address;
 801         unsigned long start = address - dev->agp->base;
 802         int i = 0;
 803         RING_LOCALS;
 804
 805         i810_kernel_lost_context(dev);
 806
 807         if (nbox > I810_NR_SAREA_CLIPRECTS)
 808                 nbox = I810_NR_SAREA_CLIPRECTS;
 809
 810         if (used > 4 * 1024)
 811                 used = 0;
 812
 813         if (sarea_priv->dirty)
 814                 i810EmitState(dev);
 815
 816         if (buf_priv->currently_mapped == I810_BUF_MAPPED) {
 817                 unsigned int prim = (sarea_priv->vertex_prim & PR_MASK);
 818
 819                 *(u32 *) buf_priv->kernel_virtual =
 820                     ((GFX_OP_PRIMITIVE | prim | ((used / 4) - 2)));
 821
 822                 if (used & 4) {
 823                         *(u32 *) ((char *) buf_priv->kernel_virtual + used) = 0;
 824                         used += 4;
 825                 }
 826
 827                 i810_unmap_buffer(buf);
 828         }
 829
 830         if (used) {
 831                 do {
 832                         if (i < nbox) {
 833                                 BEGIN_LP_RING(4);
 834                                 OUT_RING(GFX_OP_SCISSOR | SC_UPDATE_SCISSOR |
 835                                          SC_ENABLE);
 836                                 OUT_RING(GFX_OP_SCISSOR_INFO);
 837                                 OUT_RING(box[i].x1 | (box[i].y1 << 16));
 838                                 OUT_RING((box[i].x2 -
 839                                           1) | ((box[i].y2 - 1) << 16));
 840                                 ADVANCE_LP_RING();
 841                         }
 842
 843                         BEGIN_LP_RING(4);
 844                         OUT_RING(CMD_OP_BATCH_BUFFER);
 845                         OUT_RING(start | BB1_PROTECTED);
 846                         OUT_RING(start + used - 4);
 847                         OUT_RING(0);
 848                         ADVANCE_LP_RING();
 849
 850                 } while (++i < nbox);
 851         }
 852
 853         if (discard) {
 854                 dev_priv->counter++;
 855
 856                 (void)cmpxchg(buf_priv->in_use, I810_BUF_CLIENT,
 857                               I810_BUF_HARDWARE);
 858
 859                 BEGIN_LP_RING(8);
 860                 OUT_RING(CMD_STORE_DWORD_IDX);
 861                 OUT_RING(20);
 862                 OUT_RING(dev_priv->counter);
 863                 OUT_RING(CMD_STORE_DWORD_IDX);
 864                 OUT_RING(buf_priv->my_use_idx);
 865                 OUT_RING(I810_BUF_FREE);
 866                 OUT_RING(CMD_REPORT_HEAD);
 867                 OUT_RING(0);
 868                 ADVANCE_LP_RING();
 869         }
 870 }
 871
 872 static void i810_dma_dispatch_flip(drm_device_t * dev)
 873 {
 874         drm_i810_private_t *dev_priv = dev->dev_private;
 875         int pitch = dev_priv->pitch;
 876         RING_LOCALS;
 877
 878         DRM_DEBUG("%s: page=%d pfCurrentPage=%d\n",
 879                   __FUNCTION__,
 880                   dev_priv->current_page,
 881                   dev_priv->sarea_priv->pf_current_page);
 882
 883         i810_kernel_lost_context(dev);
 884
 885         BEGIN_LP_RING(2);
 886         OUT_RING(INST_PARSER_CLIENT | INST_OP_FLUSH | INST_FLUSH_MAP_CACHE);
 887         OUT_RING(0);
 888         ADVANCE_LP_RING();
 889
 890         BEGIN_LP_RING(I810_DEST_SETUP_SIZE + 2);
 891         /* On i815 at least ASYNC is buggy */
 892         /* pitch<<5 is from 11.2.8 p158,
 893            its the pitch / 8 then left shifted 8,
 894            so (pitch >> 3) << 8 */
 895         OUT_RING(CMD_OP_FRONTBUFFER_INFO | (pitch << 5) /*| ASYNC_FLIP */ );
 896         if (dev_priv->current_page == 0) {
 897                 OUT_RING(dev_priv->back_offset);
 898                 dev_priv->current_page = 1;
 899         } else {
 900                 OUT_RING(dev_priv->front_offset);
 901                 dev_priv->current_page = 0;
 902         }
 903         OUT_RING(0);
 904         ADVANCE_LP_RING();
 905
 906         BEGIN_LP_RING(2);
 907         OUT_RING(CMD_OP_WAIT_FOR_EVENT | WAIT_FOR_PLANE_A_FLIP);
 908         OUT_RING(0);
 909         ADVANCE_LP_RING();
 910
 911         /* Increment the frame counter.  The client-side 3D driver must
 912          * throttle the framerate by waiting for this value before
 913          * performing the swapbuffer ioctl.
 914          */
 915         dev_priv->sarea_priv->pf_current_page = dev_priv->current_page;
 916
 917 }
 918
 919 static void i810_dma_quiescent(drm_device_t * dev)
 920 {
 921         drm_i810_private_t *dev_priv = dev->dev_private;
 922         RING_LOCALS;
 923
 924 /*      printk("%s\n", __FUNCTION__); */
 925
 926         i810_kernel_lost_context(dev);
 927
 928         BEGIN_LP_RING(4);
 929         OUT_RING(INST_PARSER_CLIENT | INST_OP_FLUSH | INST_FLUSH_MAP_CACHE);
 930         OUT_RING(CMD_REPORT_HEAD);
 931         OUT_RING(0);
 932         OUT_RING(0);
 933         ADVANCE_LP_RING();
 934
 935         i810_wait_ring(dev, dev_priv->ring.Size - 8);
 936 }
 937
 938 static int i810_flush_queue(drm_device_t * dev)
 939 {
 940         drm_i810_private_t *dev_priv = dev->dev_private;
 941         drm_device_dma_t *dma = dev->dma;
 942         int i, ret = 0;
 943         RING_LOCALS;
 944
 945 /*      printk("%s\n", __FUNCTION__); */
 946
 947         i810_kernel_lost_context(dev);
 948
 949         BEGIN_LP_RING(2);
 950         OUT_RING(CMD_REPORT_HEAD);
 951         OUT_RING(0);
 952         ADVANCE_LP_RING();
 953
 954         i810_wait_ring(dev, dev_priv->ring.Size - 8);
 955
 956         for (i = 0; i < dma->buf_count; i++) {
 957                 drm_buf_t *buf = dma->buflist[i];
 958                 drm_i810_buf_priv_t *buf_priv = buf->dev_private;
 959
 960                 int used = cmpxchg(buf_priv->in_use, I810_BUF_HARDWARE,
 961                                    I810_BUF_FREE);
 962
 963                 if (used == I810_BUF_HARDWARE)
 964                         DRM_DEBUG("reclaimed from HARDWARE\n");
 965                 if (used == I810_BUF_CLIENT)
 966                         DRM_DEBUG("still on client\n");
 967         }
 968
 969         return ret;
 970 }
 971
 972 /* Must be called with the lock held */
 973 static void i810_reclaim_buffers(drm_device_t * dev, struct file *filp)
 974 {
 975         drm_device_dma_t *dma = dev->dma;
 976         int i;
 977
 978         if (!dma)
 979                 return;
 980         if (!dev->dev_private)
 981                 return;
 982         if (!dma->buflist)
 983                 return;
 984
 985         i810_flush_queue(dev);
 986
 987         for (i = 0; i < dma->buf_count; i++) {
 988                 drm_buf_t *buf = dma->buflist[i];
 989                 drm_i810_buf_priv_t *buf_priv = buf->dev_private;
 990
 991                 if (buf->filp == filp && buf_priv) {
 992                         int used = cmpxchg(buf_priv->in_use, I810_BUF_CLIENT,
 993                                            I810_BUF_FREE);
 994
 995                         if (used == I810_BUF_CLIENT)
 996                                 DRM_DEBUG("reclaimed from client\n");
 997                         if (buf_priv->currently_mapped == I810_BUF_MAPPED)
 998                                 buf_priv->currently_mapped = I810_BUF_UNMAPPED;
 999                 }
1000         }
1001 }
1002
1003 static int i810_flush_ioctl(struct inode *inode, struct file *filp,
1004                             unsigned int cmd, unsigned long arg)
1005 {
1006         drm_file_t *priv = filp->private_data;
1007         drm_device_t *dev = priv->head->dev;
1008
1009         LOCK_TEST_WITH_RETURN(dev, filp);
1010
1011         i810_flush_queue(dev);
1012         return 0;
1013 }
1014
1015 static int i810_dma_vertex(struct inode *inode, struct file *filp,
1016                            unsigned int cmd, unsigned long arg)
1017 {
1018         drm_file_t *priv = filp->private_data;
1019         drm_device_t *dev = priv->head->dev;
1020         drm_device_dma_t *dma = dev->dma;
1021         drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
1022         u32 *hw_status = dev_priv->hw_status_page;
1023         drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
1024             dev_priv->sarea_priv;
1025         drm_i810_vertex_t vertex;
1026
1027         if (copy_from_user
1028             (&vertex, (drm_i810_vertex_t __user *) arg, sizeof(vertex)))
1029                 return -EFAULT;
1030
1031         LOCK_TEST_WITH_RETURN(dev, filp);
1032
1033         DRM_DEBUG("i810 dma vertex, idx %d used %d discard %d\n",
1034                   vertex.idx, vertex.used, vertex.discard);
1035
1036         if (vertex.idx < 0 || vertex.idx > dma->buf_count)
1037                 return -EINVAL;
1038
1039         i810_dma_dispatch_vertex(dev,
1040                                  dma->buflist[vertex.idx],
1041                                  vertex.discard, vertex.used);
1042
1043         atomic_add(vertex.used, &dev->counts[_DRM_STAT_SECONDARY]);
1044         atomic_inc(&dev->counts[_DRM_STAT_DMA]);
1045         sarea_priv->last_enqueue = dev_priv->counter - 1;
1046         sarea_priv->last_dispatch = (int)hw_status[5];
1047
1048         return 0;
1049 }
1050
1051 static int i810_clear_bufs(struct inode *inode, struct file *filp,
1052                            unsigned int cmd, unsigned long arg)
1053 {
1054         drm_file_t *priv = filp->private_data;
1055         drm_device_t *dev = priv->head->dev;
1056         drm_i810_clear_t clear;
1057
1058         if (copy_from_user
1059             (&clear, (drm_i810_clear_t __user *) arg, sizeof(clear)))
1060                 return -EFAULT;
1061
1062         LOCK_TEST_WITH_RETURN(dev, filp);
1063
1064         /* GH: Someone's doing nasty things... */
1065         if (!dev->dev_private) {
1066                 return -EINVAL;
1067         }
1068
1069         i810_dma_dispatch_clear(dev, clear.flags,
1070                                 clear.clear_color, clear.clear_depth);
1071         return 0;
1072 }
1073
1074 static int i810_swap_bufs(struct inode *inode, struct file *filp,
1075                           unsigned int cmd, unsigned long arg)
1076 {
1077         drm_file_t *priv = filp->private_data;
1078         drm_device_t *dev = priv->head->dev;
1079
1080         DRM_DEBUG("i810_swap_bufs\n");
1081
1082         LOCK_TEST_WITH_RETURN(dev, filp);
1083
1084         i810_dma_dispatch_swap(dev);
1085         return 0;
1086 }
1087
1088 static int i810_getage(struct inode *inode, struct file *filp, unsigned int cmd,
1089                        unsigned long arg)
1090 {
1091         drm_file_t *priv = filp->private_data;
1092         drm_device_t *dev = priv->head->dev;
1093         drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
1094         u32 *hw_status = dev_priv->hw_status_page;
1095         drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
1096             dev_priv->sarea_priv;
1097
1098         sarea_priv->last_dispatch = (int)hw_status[5];
1099         return 0;
1100 }
1101
1102 static int i810_getbuf(struct inode *inode, struct file *filp, unsigned int cmd,
1103                        unsigned long arg)
1104 {
1105         drm_file_t *priv = filp->private_data;
1106         drm_device_t *dev = priv->head->dev;
1107         int retcode = 0;
1108         drm_i810_dma_t d;
1109         drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
1110         u32 *hw_status = dev_priv->hw_status_page;
1111         drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
1112             dev_priv->sarea_priv;
1113
1114         if (copy_from_user(&d, (drm_i810_dma_t __user *) arg, sizeof(d)))
1115                 return -EFAULT;
1116
1117         LOCK_TEST_WITH_RETURN(dev, filp);
1118
1119         d.granted = 0;
1120
1121         retcode = i810_dma_get_buffer(dev, &d, filp);
1122
1123         DRM_DEBUG("i810_dma: %d returning %d, granted = %d\n",
1124                   current->pid, retcode, d.granted);
1125
1126         if (copy_to_user((drm_dma_t __user *) arg, &d, sizeof(d)))
1127                 return -EFAULT;
1128         sarea_priv->last_dispatch = (int)hw_status[5];
1129
1130         return retcode;
1131 }
1132
1133 static int i810_copybuf(struct inode *inode,
1134                         struct file *filp, unsigned int cmd, unsigned long arg)
1135 {
1136         /* Never copy - 2.4.x doesn't need it */
1137         return 0;
1138 }
1139
1140 static int i810_docopy(struct inode *inode, struct file *filp, unsigned int cmd,
1141                        unsigned long arg)
1142 {
1143         /* Never copy - 2.4.x doesn't need it */
1144         return 0;
1145 }
1146
1147 static void i810_dma_dispatch_mc(drm_device_t * dev, drm_buf_t * buf, int used,
1148                                  unsigned int last_render)
1149 {
1150         drm_i810_private_t *dev_priv = dev->dev_private;
1151         drm_i810_buf_priv_t *buf_priv = buf->dev_private;
1152         drm_i810_sarea_t *sarea_priv = dev_priv->sarea_priv;
1153         unsigned long address = (unsigned long)buf->bus_address;
1154         unsigned long start = address - dev->agp->base;
1155         int u;
1156         RING_LOCALS;
1157
1158         i810_kernel_lost_context(dev);
1159
1160         u = cmpxchg(buf_priv->in_use, I810_BUF_CLIENT, I810_BUF_HARDWARE);
1161         if (u != I810_BUF_CLIENT) {
1162                 DRM_DEBUG("MC found buffer that isn't mine!\n");
1163         }
1164
1165         if (used > 4 * 1024)
1166                 used = 0;
1167
1168         sarea_priv->dirty = 0x7f;
1169
1170         DRM_DEBUG("dispatch mc addr 0x%lx, used 0x%x\n", address, used);
1171
1172         dev_priv->counter++;
1173         DRM_DEBUG("dispatch counter : %ld\n", dev_priv->counter);
1174         DRM_DEBUG("i810_dma_dispatch_mc\n");
1175         DRM_DEBUG("start : %lx\n", start);
1176         DRM_DEBUG("used : %d\n", used);
1177         DRM_DEBUG("start + used - 4 : %ld\n", start + used - 4);
1178
1179         if (buf_priv->currently_mapped == I810_BUF_MAPPED) {
1180                 if (used & 4) {
1181                         *(u32 *) ((char *) buf_priv->virtual + used) = 0;
1182                         used += 4;
1183                 }
1184
1185                 i810_unmap_buffer(buf);
1186         }
1187         BEGIN_LP_RING(4);
1188         OUT_RING(CMD_OP_BATCH_BUFFER);
1189         OUT_RING(start | BB1_PROTECTED);
1190         OUT_RING(start + used - 4);
1191         OUT_RING(0);
1192         ADVANCE_LP_RING();
1193
1194         BEGIN_LP_RING(8);
1195         OUT_RING(CMD_STORE_DWORD_IDX);
1196         OUT_RING(buf_priv->my_use_idx);
1197         OUT_RING(I810_BUF_FREE);
1198         OUT_RING(0);
1199
1200         OUT_RING(CMD_STORE_DWORD_IDX);
1201         OUT_RING(16);
1202         OUT_RING(last_render);
1203         OUT_RING(0);
1204         ADVANCE_LP_RING();
1205 }
1206
1207 static int i810_dma_mc(struct inode *inode, struct file *filp,
1208                        unsigned int cmd, unsigned long arg)
1209 {
1210         drm_file_t *priv = filp->private_data;
1211         drm_device_t *dev = priv->head->dev;
1212         drm_device_dma_t *dma = dev->dma;
1213         drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
1214         u32 *hw_status = dev_priv->hw_status_page;
1215         drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
1216             dev_priv->sarea_priv;
1217         drm_i810_mc_t mc;
1218
1219         if (copy_from_user(&mc, (drm_i810_mc_t __user *) arg, sizeof(mc)))
1220                 return -EFAULT;
1221
1222         LOCK_TEST_WITH_RETURN(dev, filp);
1223
1224         if (mc.idx >= dma->buf_count || mc.idx < 0)
1225                 return -EINVAL;
1226
1227         i810_dma_dispatch_mc(dev, dma->buflist[mc.idx], mc.used,
1228                              mc.last_render);
1229
1230         atomic_add(mc.used, &dev->counts[_DRM_STAT_SECONDARY]);
1231         atomic_inc(&dev->counts[_DRM_STAT_DMA]);
1232         sarea_priv->last_enqueue = dev_priv->counter - 1;
1233         sarea_priv->last_dispatch = (int)hw_status[5];
1234
1235         return 0;
1236 }
1237
1238 static int i810_rstatus(struct inode *inode, struct file *filp,
1239                         unsigned int cmd, unsigned long arg)
1240 {
1241         drm_file_t *priv = filp->private_data;
1242         drm_device_t *dev = priv->head->dev;
1243         drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
1244
1245         return (int)(((u32 *) (dev_priv->hw_status_page))[4]);
1246 }
1247
1248 static int i810_ov0_info(struct inode *inode, struct file *filp,
1249                          unsigned int cmd, unsigned long arg)
1250 {
1251         drm_file_t *priv = filp->private_data;
1252         drm_device_t *dev = priv->head->dev;
1253         drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
1254         drm_i810_overlay_t data;
1255
1256         data.offset = dev_priv->overlay_offset;
1257         data.physical = dev_priv->overlay_physical;
1258         if (copy_to_user
1259             ((drm_i810_overlay_t __user *) arg, &data, sizeof(data)))
1260                 return -EFAULT;
1261         return 0;
1262 }
1263
1264 static int i810_fstatus(struct inode *inode, struct file *filp,
1265                         unsigned int cmd, unsigned long arg)
1266 {
1267         drm_file_t *priv = filp->private_data;
1268         drm_device_t *dev = priv->head->dev;
1269         drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
1270
1271         LOCK_TEST_WITH_RETURN(dev, filp);
1272
1273         return I810_READ(0x30008);
1274 }
1275
1276 static int i810_ov0_flip(struct inode *inode, struct file *filp,
1277                          unsigned int cmd, unsigned long arg)
1278 {
1279         drm_file_t *priv = filp->private_data;
1280         drm_device_t *dev = priv->head->dev;
1281         drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
1282
1283         LOCK_TEST_WITH_RETURN(dev, filp);
1284
1285         //Tell the overlay to update
1286         I810_WRITE(0x30000, dev_priv->overlay_physical | 0x80000000);
1287
1288         return 0;
1289 }
1290
1291 /* Not sure why this isn't set all the time:
1292  */
1293 static void i810_do_init_pageflip(drm_device_t * dev)
1294 {
1295         drm_i810_private_t *dev_priv = dev->dev_private;
1296
1297         DRM_DEBUG("%s\n", __FUNCTION__);
1298         dev_priv->page_flipping = 1;
1299         dev_priv->current_page = 0;
1300         dev_priv->sarea_priv->pf_current_page = dev_priv->current_page;
1301 }
1302
1303 static int i810_do_cleanup_pageflip(drm_device_t * dev)
1304 {
1305         drm_i810_private_t *dev_priv = dev->dev_private;
1306
1307         DRM_DEBUG("%s\n", __FUNCTION__);
1308         if (dev_priv->current_page != 0)
1309                 i810_dma_dispatch_flip(dev);
1310
1311         dev_priv->page_flipping = 0;
1312         return 0;
1313 }
1314
1315 static int i810_flip_bufs(struct inode *inode, struct file *filp,
1316                           unsigned int cmd, unsigned long arg)
1317 {
1318         drm_file_t *priv = filp->private_data;
1319         drm_device_t *dev = priv->head->dev;
1320         drm_i810_private_t *dev_priv = dev->dev_private;
1321
1322         DRM_DEBUG("%s\n", __FUNCTION__);
1323
1324         LOCK_TEST_WITH_RETURN(dev, filp);
1325
1326         if (!dev_priv->page_flipping)
1327                 i810_do_init_pageflip(dev);
1328
1329         i810_dma_dispatch_flip(dev);
1330         return 0;
1331 }
1332
1333 int i810_driver_load(drm_device_t *dev, unsigned long flags)
1334 {
1335         /* i810 has 4 more counters */
1336         dev->counters += 4;
1337         dev->types[6] = _DRM_STAT_IRQ;
1338         dev->types[7] = _DRM_STAT_PRIMARY;
1339         dev->types[8] = _DRM_STAT_SECONDARY;
1340         dev->types[9] = _DRM_STAT_DMA;
1341
1342         return 0;
1343 }
1344
1345 void i810_driver_lastclose(drm_device_t * dev)
1346 {
1347         i810_dma_cleanup(dev);
1348 }
1349
1350 void i810_driver_preclose(drm_device_t * dev, DRMFILE filp)
1351 {
1352         if (dev->dev_private) {
1353                 drm_i810_private_t *dev_priv = dev->dev_private;
1354                 if (dev_priv->page_flipping) {
1355                         i810_do_cleanup_pageflip(dev);
1356                 }
1357         }
1358 }
1359
1360 void i810_driver_reclaim_buffers_locked(drm_device_t * dev, struct file *filp)
1361 {
1362         i810_reclaim_buffers(dev, filp);
1363 }
1364
1365 int i810_driver_dma_quiescent(drm_device_t * dev)
1366 {
1367         i810_dma_quiescent(dev);
1368         return 0;
1369 }
1370
1371 drm_ioctl_desc_t i810_ioctls[] = {
1372         [DRM_IOCTL_NR(DRM_I810_INIT)] = {i810_dma_init, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
1373         [DRM_IOCTL_NR(DRM_I810_VERTEX)] = {i810_dma_vertex, DRM_AUTH},
1374         [DRM_IOCTL_NR(DRM_I810_CLEAR)] = {i810_clear_bufs, DRM_AUTH},
1375         [DRM_IOCTL_NR(DRM_I810_FLUSH)] = {i810_flush_ioctl, DRM_AUTH},
1376         [DRM_IOCTL_NR(DRM_I810_GETAGE)] = {i810_getage, DRM_AUTH},
1377         [DRM_IOCTL_NR(DRM_I810_GETBUF)] = {i810_getbuf, DRM_AUTH},
1378         [DRM_IOCTL_NR(DRM_I810_SWAP)] = {i810_swap_bufs, DRM_AUTH},
1379         [DRM_IOCTL_NR(DRM_I810_COPY)] = {i810_copybuf, DRM_AUTH},
1380         [DRM_IOCTL_NR(DRM_I810_DOCOPY)] = {i810_docopy, DRM_AUTH},
1381         [DRM_IOCTL_NR(DRM_I810_OV0INFO)] = {i810_ov0_info, DRM_AUTH},
1382         [DRM_IOCTL_NR(DRM_I810_FSTATUS)] = {i810_fstatus, DRM_AUTH},
1383         [DRM_IOCTL_NR(DRM_I810_OV0FLIP)] = {i810_ov0_flip, DRM_AUTH},
1384         [DRM_IOCTL_NR(DRM_I810_MC)] = {i810_dma_mc, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
1385         [DRM_IOCTL_NR(DRM_I810_RSTATUS)] = {i810_rstatus, DRM_AUTH},
1386         [DRM_IOCTL_NR(DRM_I810_FLIP)] = {i810_flip_bufs, DRM_AUTH}
1387 };
1388
1389 int i810_max_ioctl = DRM_ARRAY_SIZE(i810_ioctls);
1390
1391 /**
1392  * Determine if the device really is AGP or not.
1393  *
1394  * All Intel graphics chipsets are treated as AGP, even if they are really
1395  * PCI-e.
1396  *
1397  * \param dev   The device to be tested.
1398  *
1399  * \returns
1400  * A value of 1 is always retured to indictate every i810 is AGP.
1401  */
1402 int i810_driver_device_is_agp(drm_device_t * dev)
1403 {
1404         return 1;
1405 }