drivers/char/drm/i830_dma.c

   1 /* i830_dma.c -- DMA support for the I830 -*- linux-c -*-
   2  * Created: Mon Dec 13 01:50:01 1999 by [email protected]
   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 <[email protected]>
  28  *          Jeff Hartmann <[email protected]>
  29  *          Keith Whitwell <[email protected]>
  30  *          Abraham vd Merwe <[email protected]>
  31  *
  32  */
  33
  34 #include "drmP.h"
  35 #include "drm.h"
  36 #include "i830_drm.h"
  37 #include "i830_drv.h"
  38 #include <linux/interrupt.h>    /* For task queue support */
  39 #include <linux/pagemap.h>      /* For FASTCALL on unlock_page() */
  40 #include <linux/delay.h>
  41 #include <asm/uaccess.h>
  42
  43 #define I830_BUF_FREE           2
  44 #define I830_BUF_CLIENT         1
  45 #define I830_BUF_HARDWARE       0
  46
  47 #define I830_BUF_UNMAPPED 0
  48 #define I830_BUF_MAPPED   1
  49
  50 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,4,2)
  51 #define down_write down
  52 #define up_write up
  53 #endif
  54
  55 static drm_buf_t *i830_freelist_get(drm_device_t *dev)
  56 {
  57         drm_device_dma_t *dma = dev->dma;
  58         int              i;
  59         int              used;
  60
  61         /* Linear search might not be the best solution */
  62
  63         for (i = 0; i < dma->buf_count; i++) {
  64                 drm_buf_t *buf = dma->buflist[ i ];
  65                 drm_i830_buf_priv_t *buf_priv = buf->dev_private;
  66                 /* In use is already a pointer */
  67                 used = cmpxchg(buf_priv->in_use, I830_BUF_FREE,
  68                                I830_BUF_CLIENT);
  69                 if(used == I830_BUF_FREE) {
  70                         return buf;
  71                 }
  72         }
  73         return NULL;
  74 }
  75
  76 /* This should only be called if the buffer is not sent to the hardware
  77  * yet, the hardware updates in use for us once its on the ring buffer.
  78  */
  79
  80 static int i830_freelist_put(drm_device_t *dev, drm_buf_t *buf)
  81 {
  82         drm_i830_buf_priv_t *buf_priv = buf->dev_private;
  83         int used;
  84
  85         /* In use is already a pointer */
  86         used = cmpxchg(buf_priv->in_use, I830_BUF_CLIENT, I830_BUF_FREE);
  87         if(used != I830_BUF_CLIENT) {
  88                 DRM_ERROR("Freeing buffer thats not in use : %d\n", buf->idx);
  89                 return -EINVAL;
  90         }
  91
  92         return 0;
  93 }
  94
  95 static int i830_mmap_buffers(struct file *filp, struct vm_area_struct *vma)
  96 {
  97         drm_file_t          *priv         = filp->private_data;
  98         drm_device_t        *dev;
  99         drm_i830_private_t  *dev_priv;
 100         drm_buf_t           *buf;
 101         drm_i830_buf_priv_t *buf_priv;
 102
 103         lock_kernel();
 104         dev      = priv->head->dev;
 105         dev_priv = dev->dev_private;
 106         buf      = dev_priv->mmap_buffer;
 107         buf_priv = buf->dev_private;
 108
 109         vma->vm_flags |= (VM_IO | VM_DONTCOPY);
 110         vma->vm_file = filp;
 111
 112         buf_priv->currently_mapped = I830_BUF_MAPPED;
 113         unlock_kernel();
 114
 115         if (io_remap_pfn_range(vma, vma->vm_start,
 116                              VM_OFFSET(vma) >> PAGE_SHIFT,
 117                              vma->vm_end - vma->vm_start,
 118                              vma->vm_page_prot)) return -EAGAIN;
 119         return 0;
 120 }
 121
 122 static struct file_operations i830_buffer_fops = {
 123         .open    = drm_open,
 124         .flush   = drm_flush,
 125         .release = drm_release,
 126         .ioctl   = drm_ioctl,
 127         .mmap    = i830_mmap_buffers,
 128         .fasync  = drm_fasync,
 129 };
 130
 131 static int i830_map_buffer(drm_buf_t *buf, struct file *filp)
 132 {
 133         drm_file_t        *priv   = filp->private_data;
 134         drm_device_t      *dev    = priv->head->dev;
 135         drm_i830_buf_priv_t *buf_priv = buf->dev_private;
 136         drm_i830_private_t *dev_priv = dev->dev_private;
 137         struct file_operations *old_fops;
 138         unsigned long virtual;
 139         int retcode = 0;
 140
 141         if(buf_priv->currently_mapped == I830_BUF_MAPPED) return -EINVAL;
 142
 143         down_write( &current->mm->mmap_sem );
 144         old_fops = filp->f_op;
 145         filp->f_op = &i830_buffer_fops;
 146         dev_priv->mmap_buffer = buf;
 147         virtual = do_mmap(filp, 0, buf->total, PROT_READ|PROT_WRITE,
 148                             MAP_SHARED, buf->bus_address);
 149         dev_priv->mmap_buffer = NULL;
 150         filp->f_op = old_fops;
 151         if (IS_ERR((void *)virtual)) {          /* ugh */
 152                 /* Real error */
 153                 DRM_ERROR("mmap error\n");
 154                 retcode = virtual;
 155                 buf_priv->virtual = NULL;
 156         } else {
 157                 buf_priv->virtual = (void __user *)virtual;
 158         }
 159         up_write( &current->mm->mmap_sem );
 160
 161         return retcode;
 162 }
 163
 164 static int i830_unmap_buffer(drm_buf_t *buf)
 165 {
 166         drm_i830_buf_priv_t *buf_priv = buf->dev_private;
 167         int retcode = 0;
 168
 169         if(buf_priv->currently_mapped != I830_BUF_MAPPED)
 170                 return -EINVAL;
 171
 172         down_write(&current->mm->mmap_sem);
 173         retcode = do_munmap(current->mm,
 174                             (unsigned long)buf_priv->virtual,
 175                             (size_t) buf->total);
 176         up_write(&current->mm->mmap_sem);
 177
 178         buf_priv->currently_mapped = I830_BUF_UNMAPPED;
 179         buf_priv->virtual = NULL;
 180
 181         return retcode;
 182 }
 183
 184 static int i830_dma_get_buffer(drm_device_t *dev, drm_i830_dma_t *d,
 185                                struct file *filp)
 186 {
 187         drm_buf_t         *buf;
 188         drm_i830_buf_priv_t *buf_priv;
 189         int retcode = 0;
 190
 191         buf = i830_freelist_get(dev);
 192         if (!buf) {
 193                 retcode = -ENOMEM;
 194                 DRM_DEBUG("retcode=%d\n", retcode);
 195                 return retcode;
 196         }
 197
 198         retcode = i830_map_buffer(buf, filp);
 199         if(retcode) {
 200                 i830_freelist_put(dev, buf);
 201                 DRM_ERROR("mapbuf failed, retcode %d\n", retcode);
 202                 return retcode;
 203         }
 204         buf->filp = filp;
 205         buf_priv = buf->dev_private;
 206         d->granted = 1;
 207         d->request_idx = buf->idx;
 208         d->request_size = buf->total;
 209         d->virtual = buf_priv->virtual;
 210
 211         return retcode;
 212 }
 213
 214 static int i830_dma_cleanup(drm_device_t *dev)
 215 {
 216         drm_device_dma_t *dma = dev->dma;
 217
 218         /* Make sure interrupts are disabled here because the uninstall ioctl
 219          * may not have been called from userspace and after dev_private
 220          * is freed, it's too late.
 221          */
 222         if ( dev->irq_enabled ) drm_irq_uninstall(dev);
 223
 224         if (dev->dev_private) {
 225                 int i;
 226                 drm_i830_private_t *dev_priv =
 227                         (drm_i830_private_t *) dev->dev_private;
 228
 229                 if (dev_priv->ring.virtual_start) {
 230                         drm_ioremapfree((void *) dev_priv->ring.virtual_start,
 231                                          dev_priv->ring.Size, dev);
 232                 }
 233                 if (dev_priv->hw_status_page) {
 234                         pci_free_consistent(dev->pdev, PAGE_SIZE,
 235                                             dev_priv->hw_status_page,
 236                                             dev_priv->dma_status_page);
 237                         /* Need to rewrite hardware status page */
 238                         I830_WRITE(0x02080, 0x1ffff000);
 239                 }
 240
 241                 drm_free(dev->dev_private, sizeof(drm_i830_private_t),
 242                          DRM_MEM_DRIVER);
 243                 dev->dev_private = NULL;
 244
 245                 for (i = 0; i < dma->buf_count; i++) {
 246                         drm_buf_t *buf = dma->buflist[ i ];
 247                         drm_i830_buf_priv_t *buf_priv = buf->dev_private;
 248                         if ( buf_priv->kernel_virtual && buf->total )
 249                                 drm_ioremapfree(buf_priv->kernel_virtual, buf->total, dev);
 250                 }
 251         }
 252         return 0;
 253 }
 254
 255 int i830_wait_ring(drm_device_t *dev, int n, const char *caller)
 256 {
 257         drm_i830_private_t *dev_priv = dev->dev_private;
 258         drm_i830_ring_buffer_t *ring = &(dev_priv->ring);
 259         int iters = 0;
 260         unsigned long end;
 261         unsigned int last_head = I830_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
 262
 263         end = jiffies + (HZ*3);
 264         while (ring->space < n) {
 265                 ring->head = I830_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
 266                 ring->space = ring->head - (ring->tail+8);
 267                 if (ring->space < 0) ring->space += ring->Size;
 268
 269                 if (ring->head != last_head) {
 270                         end = jiffies + (HZ*3);
 271                         last_head = ring->head;
 272                 }
 273
 274                 iters++;
 275                 if(time_before(end, jiffies)) {
 276                         DRM_ERROR("space: %d wanted %d\n", ring->space, n);
 277                         DRM_ERROR("lockup\n");
 278                         goto out_wait_ring;
 279                 }
 280                 udelay(1);
 281                 dev_priv->sarea_priv->perf_boxes |= I830_BOX_WAIT;
 282         }
 283
 284 out_wait_ring:
 285         return iters;
 286 }
 287
 288 static void i830_kernel_lost_context(drm_device_t *dev)
 289 {
 290         drm_i830_private_t *dev_priv = dev->dev_private;
 291         drm_i830_ring_buffer_t *ring = &(dev_priv->ring);
 292
 293         ring->head = I830_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
 294         ring->tail = I830_READ(LP_RING + RING_TAIL) & TAIL_ADDR;
 295         ring->space = ring->head - (ring->tail+8);
 296         if (ring->space < 0) ring->space += ring->Size;
 297
 298         if (ring->head == ring->tail)
 299                 dev_priv->sarea_priv->perf_boxes |= I830_BOX_RING_EMPTY;
 300 }
 301
 302 static int i830_freelist_init(drm_device_t *dev, drm_i830_private_t *dev_priv)
 303 {
 304         drm_device_dma_t *dma = dev->dma;
 305         int my_idx = 36;
 306         u32 *hw_status = (u32 *)(dev_priv->hw_status_page + my_idx);
 307         int i;
 308
 309         if(dma->buf_count > 1019) {
 310                 /* Not enough space in the status page for the freelist */
 311                 return -EINVAL;
 312         }
 313
 314         for (i = 0; i < dma->buf_count; i++) {
 315                 drm_buf_t *buf = dma->buflist[ i ];
 316                 drm_i830_buf_priv_t *buf_priv = buf->dev_private;
 317
 318                 buf_priv->in_use = hw_status++;
 319                 buf_priv->my_use_idx = my_idx;
 320                 my_idx += 4;
 321
 322                 *buf_priv->in_use = I830_BUF_FREE;
 323
 324                 buf_priv->kernel_virtual = drm_ioremap(buf->bus_address,
 325                                                         buf->total, dev);
 326         }
 327         return 0;
 328 }
 329
 330 static int i830_dma_initialize(drm_device_t *dev,
 331                                drm_i830_private_t *dev_priv,
 332                                drm_i830_init_t *init)
 333 {
 334         struct list_head *list;
 335
 336         memset(dev_priv, 0, sizeof(drm_i830_private_t));
 337
 338         list_for_each(list, &dev->maplist->head) {
 339                 drm_map_list_t *r_list = list_entry(list, drm_map_list_t, head);
 340                 if( r_list->map &&
 341                     r_list->map->type == _DRM_SHM &&
 342                     r_list->map->flags & _DRM_CONTAINS_LOCK ) {
 343                         dev_priv->sarea_map = r_list->map;
 344                         break;
 345                 }
 346         }
 347
 348         if(!dev_priv->sarea_map) {
 349                 dev->dev_private = (void *)dev_priv;
 350                 i830_dma_cleanup(dev);
 351                 DRM_ERROR("can not find sarea!\n");
 352                 return -EINVAL;
 353         }
 354         dev_priv->mmio_map = drm_core_findmap(dev, init->mmio_offset);
 355         if(!dev_priv->mmio_map) {
 356                 dev->dev_private = (void *)dev_priv;
 357                 i830_dma_cleanup(dev);
 358                 DRM_ERROR("can not find mmio map!\n");
 359                 return -EINVAL;
 360         }
 361         dev->agp_buffer_map = drm_core_findmap(dev, init->buffers_offset);
 362         if(!dev->agp_buffer_map) {
 363                 dev->dev_private = (void *)dev_priv;
 364                 i830_dma_cleanup(dev);
 365                 DRM_ERROR("can not find dma buffer map!\n");
 366                 return -EINVAL;
 367         }
 368
 369         dev_priv->sarea_priv = (drm_i830_sarea_t *)
 370                 ((u8 *)dev_priv->sarea_map->handle +
 371                  init->sarea_priv_offset);
 372
 373         dev_priv->ring.Start = init->ring_start;
 374         dev_priv->ring.End = init->ring_end;
 375         dev_priv->ring.Size = init->ring_size;
 376
 377         dev_priv->ring.virtual_start = drm_ioremap(dev->agp->base +
 378                                                     init->ring_start,
 379                                                     init->ring_size, dev);
 380
 381         if (dev_priv->ring.virtual_start == NULL) {
 382                 dev->dev_private = (void *) dev_priv;
 383                 i830_dma_cleanup(dev);
 384                 DRM_ERROR("can not ioremap virtual address for"
 385                           " ring buffer\n");
 386                 return -ENOMEM;
 387         }
 388
 389         dev_priv->ring.tail_mask = dev_priv->ring.Size - 1;
 390
 391         dev_priv->w = init->w;
 392         dev_priv->h = init->h;
 393         dev_priv->pitch = init->pitch;
 394         dev_priv->back_offset = init->back_offset;
 395         dev_priv->depth_offset = init->depth_offset;
 396         dev_priv->front_offset = init->front_offset;
 397
 398         dev_priv->front_di1 = init->front_offset | init->pitch_bits;
 399         dev_priv->back_di1 = init->back_offset | init->pitch_bits;
 400         dev_priv->zi1 = init->depth_offset | init->pitch_bits;
 401
 402         DRM_DEBUG("front_di1 %x\n",    dev_priv->front_di1);
 403         DRM_DEBUG("back_offset %x\n", dev_priv->back_offset);
 404         DRM_DEBUG("back_di1 %x\n",    dev_priv->back_di1);
 405         DRM_DEBUG("pitch_bits %x\n",    init->pitch_bits);
 406
 407         dev_priv->cpp = init->cpp;
 408         /* We are using separate values as placeholders for mechanisms for
 409          * private backbuffer/depthbuffer usage.
 410          */
 411
 412         dev_priv->back_pitch = init->back_pitch;
 413         dev_priv->depth_pitch = init->depth_pitch;
 414         dev_priv->do_boxes = 0;
 415         dev_priv->use_mi_batchbuffer_start = 0;
 416
 417         /* Program Hardware Status Page */
 418         dev_priv->hw_status_page =
 419                 pci_alloc_consistent(dev->pdev, PAGE_SIZE,
 420                                                 &dev_priv->dma_status_page);
 421         if (!dev_priv->hw_status_page) {
 422                 dev->dev_private = (void *)dev_priv;
 423                 i830_dma_cleanup(dev);
 424                 DRM_ERROR("Can not allocate hardware status page\n");
 425                 return -ENOMEM;
 426         }
 427         memset(dev_priv->hw_status_page, 0, PAGE_SIZE);
 428         DRM_DEBUG("hw status page @ %p\n", dev_priv->hw_status_page);
 429
 430         I830_WRITE(0x02080, dev_priv->dma_status_page);
 431         DRM_DEBUG("Enabled hardware status page\n");
 432
 433         /* Now we need to init our freelist */
 434         if(i830_freelist_init(dev, dev_priv) != 0) {
 435                 dev->dev_private = (void *)dev_priv;
 436                 i830_dma_cleanup(dev);
 437                 DRM_ERROR("Not enough space in the status page for"
 438                           " the freelist\n");
 439                 return -ENOMEM;
 440         }
 441         dev->dev_private = (void *)dev_priv;
 442
 443         return 0;
 444 }
 445
 446 static int i830_dma_init(struct inode *inode, struct file *filp,
 447                   unsigned int cmd, unsigned long arg)
 448 {
 449         drm_file_t *priv = filp->private_data;
 450         drm_device_t *dev = priv->head->dev;
 451         drm_i830_private_t *dev_priv;
 452         drm_i830_init_t init;
 453         int retcode = 0;
 454
 455         if (copy_from_user(&init, (void * __user) arg, sizeof(init)))
 456                 return -EFAULT;
 457
 458         switch(init.func) {
 459                 case I830_INIT_DMA:
 460                         dev_priv = drm_alloc(sizeof(drm_i830_private_t),
 461                                               DRM_MEM_DRIVER);
 462                         if(dev_priv == NULL) return -ENOMEM;
 463                         retcode = i830_dma_initialize(dev, dev_priv, &init);
 464                 break;
 465                 case I830_CLEANUP_DMA:
 466                         retcode = i830_dma_cleanup(dev);
 467                 break;
 468                 default:
 469                         retcode = -EINVAL;
 470                 break;
 471         }
 472
 473         return retcode;
 474 }
 475
 476 #define GFX_OP_STIPPLE           ((0x3<<29)|(0x1d<<24)|(0x83<<16))
 477 #define ST1_ENABLE               (1<<16)
 478 #define ST1_MASK                 (0xffff)
 479
 480 /* Most efficient way to verify state for the i830 is as it is
 481  * emitted.  Non-conformant state is silently dropped.
 482  */
 483 static void i830EmitContextVerified( drm_device_t *dev,
 484                                      unsigned int *code )
 485 {
 486         drm_i830_private_t *dev_priv = dev->dev_private;
 487         int i, j = 0;
 488         unsigned int tmp;
 489         RING_LOCALS;
 490
 491         BEGIN_LP_RING( I830_CTX_SETUP_SIZE + 4 );
 492
 493         for ( i = 0 ; i < I830_CTXREG_BLENDCOLR0 ; i++ ) {
 494                 tmp = code[i];
 495                 if ((tmp & (7<<29)) == CMD_3D &&
 496                     (tmp & (0x1f<<24)) < (0x1d<<24)) {
 497                         OUT_RING( tmp );
 498                         j++;
 499                 } else {
 500                         DRM_ERROR("Skipping %d\n", i);
 501                 }
 502         }
 503
 504         OUT_RING( STATE3D_CONST_BLEND_COLOR_CMD );
 505         OUT_RING( code[I830_CTXREG_BLENDCOLR] );
 506         j += 2;
 507
 508         for ( i = I830_CTXREG_VF ; i < I830_CTXREG_MCSB0 ; i++ ) {
 509                 tmp = code[i];
 510                 if ((tmp & (7<<29)) == CMD_3D &&
 511                     (tmp & (0x1f<<24)) < (0x1d<<24)) {
 512                         OUT_RING( tmp );
 513                         j++;
 514                 } else {
 515                         DRM_ERROR("Skipping %d\n", i);
 516                 }
 517         }
 518
 519         OUT_RING( STATE3D_MAP_COORD_SETBIND_CMD );
 520         OUT_RING( code[I830_CTXREG_MCSB1] );
 521         j += 2;
 522
 523         if (j & 1)
 524                 OUT_RING( 0 );
 525
 526         ADVANCE_LP_RING();
 527 }
 528
 529 static void i830EmitTexVerified( drm_device_t *dev, unsigned int *code )
 530 {
 531         drm_i830_private_t *dev_priv = dev->dev_private;
 532         int i, j = 0;
 533         unsigned int tmp;
 534         RING_LOCALS;
 535
 536         if (code[I830_TEXREG_MI0] == GFX_OP_MAP_INFO ||
 537             (code[I830_TEXREG_MI0] & ~(0xf*LOAD_TEXTURE_MAP0)) ==
 538             (STATE3D_LOAD_STATE_IMMEDIATE_2|4)) {
 539
 540                 BEGIN_LP_RING( I830_TEX_SETUP_SIZE );
 541
 542                 OUT_RING( code[I830_TEXREG_MI0] ); /* TM0LI */
 543                 OUT_RING( code[I830_TEXREG_MI1] ); /* TM0S0 */
 544                 OUT_RING( code[I830_TEXREG_MI2] ); /* TM0S1 */
 545                 OUT_RING( code[I830_TEXREG_MI3] ); /* TM0S2 */
 546                 OUT_RING( code[I830_TEXREG_MI4] ); /* TM0S3 */
 547                 OUT_RING( code[I830_TEXREG_MI5] ); /* TM0S4 */
 548
 549                 for ( i = 6 ; i < I830_TEX_SETUP_SIZE ; i++ ) {
 550                         tmp = code[i];
 551                         OUT_RING( tmp );
 552                         j++;
 553                 }
 554
 555                 if (j & 1)
 556                         OUT_RING( 0 );
 557
 558                 ADVANCE_LP_RING();
 559         }
 560         else
 561                 printk("rejected packet %x\n", code[0]);
 562 }
 563
 564 static void i830EmitTexBlendVerified( drm_device_t *dev,
 565                                       unsigned int *code,
 566                                       unsigned int num)
 567 {
 568         drm_i830_private_t *dev_priv = dev->dev_private;
 569         int i, j = 0;
 570         unsigned int tmp;
 571         RING_LOCALS;
 572
 573         if (!num)
 574                 return;
 575
 576         BEGIN_LP_RING( num + 1 );
 577
 578         for ( i = 0 ; i < num ; i++ ) {
 579                 tmp = code[i];
 580                 OUT_RING( tmp );
 581                 j++;
 582         }
 583
 584         if (j & 1)
 585                 OUT_RING( 0 );
 586
 587         ADVANCE_LP_RING();
 588 }
 589
 590 static void i830EmitTexPalette( drm_device_t *dev,
 591                                 unsigned int *palette,
 592                                 int number,
 593                                 int is_shared )
 594 {
 595         drm_i830_private_t *dev_priv = dev->dev_private;
 596         int i;
 597         RING_LOCALS;
 598
 599         return;
 600
 601         BEGIN_LP_RING( 258 );
 602
 603         if(is_shared == 1) {
 604                 OUT_RING(CMD_OP_MAP_PALETTE_LOAD |
 605                          MAP_PALETTE_NUM(0) |
 606                          MAP_PALETTE_BOTH);
 607         } else {
 608                 OUT_RING(CMD_OP_MAP_PALETTE_LOAD | MAP_PALETTE_NUM(number));
 609         }
 610         for(i = 0; i < 256; i++) {
 611                 OUT_RING(palette[i]);
 612         }
 613         OUT_RING(0);
 614         /* KW:  WHERE IS THE ADVANCE_LP_RING?  This is effectively a noop!
 615          */
 616 }
 617
 618 /* Need to do some additional checking when setting the dest buffer.
 619  */
 620 static void i830EmitDestVerified( drm_device_t *dev,
 621                                   unsigned int *code )
 622 {
 623         drm_i830_private_t *dev_priv = dev->dev_private;
 624         unsigned int tmp;
 625         RING_LOCALS;
 626
 627         BEGIN_LP_RING( I830_DEST_SETUP_SIZE + 10 );
 628
 629
 630         tmp = code[I830_DESTREG_CBUFADDR];
 631         if (tmp == dev_priv->front_di1 || tmp == dev_priv->back_di1) {
 632                 if (((int)outring) & 8) {
 633                         OUT_RING(0);
 634                         OUT_RING(0);
 635                 }
 636
 637                 OUT_RING( CMD_OP_DESTBUFFER_INFO );
 638                 OUT_RING( BUF_3D_ID_COLOR_BACK |
 639                           BUF_3D_PITCH(dev_priv->back_pitch * dev_priv->cpp) |
 640                           BUF_3D_USE_FENCE);
 641                 OUT_RING( tmp );
 642                 OUT_RING( 0 );
 643
 644                 OUT_RING( CMD_OP_DESTBUFFER_INFO );
 645                 OUT_RING( BUF_3D_ID_DEPTH | BUF_3D_USE_FENCE |
 646                           BUF_3D_PITCH(dev_priv->depth_pitch * dev_priv->cpp));
 647                 OUT_RING( dev_priv->zi1 );
 648                 OUT_RING( 0 );
 649         } else {
 650                 DRM_ERROR("bad di1 %x (allow %x or %x)\n",
 651                           tmp, dev_priv->front_di1, dev_priv->back_di1);
 652         }
 653
 654         /* invarient:
 655          */
 656
 657
 658         OUT_RING( GFX_OP_DESTBUFFER_VARS );
 659         OUT_RING( code[I830_DESTREG_DV1] );
 660
 661         OUT_RING( GFX_OP_DRAWRECT_INFO );
 662         OUT_RING( code[I830_DESTREG_DR1] );
 663         OUT_RING( code[I830_DESTREG_DR2] );
 664         OUT_RING( code[I830_DESTREG_DR3] );
 665         OUT_RING( code[I830_DESTREG_DR4] );
 666
 667         /* Need to verify this */
 668         tmp = code[I830_DESTREG_SENABLE];
 669         if((tmp & ~0x3) == GFX_OP_SCISSOR_ENABLE) {
 670                 OUT_RING( tmp );
 671         } else {
 672                 DRM_ERROR("bad scissor enable\n");
 673                 OUT_RING( 0 );
 674         }
 675
 676         OUT_RING( GFX_OP_SCISSOR_RECT );
 677         OUT_RING( code[I830_DESTREG_SR1] );
 678         OUT_RING( code[I830_DESTREG_SR2] );
 679         OUT_RING( 0 );
 680
 681         ADVANCE_LP_RING();
 682 }
 683
 684 static void i830EmitStippleVerified( drm_device_t *dev,
 685                                      unsigned int *code )
 686 {
 687         drm_i830_private_t *dev_priv = dev->dev_private;
 688         RING_LOCALS;
 689
 690         BEGIN_LP_RING( 2 );
 691         OUT_RING( GFX_OP_STIPPLE );
 692         OUT_RING( code[1] );
 693         ADVANCE_LP_RING();
 694 }
 695
 696
 697 static void i830EmitState( drm_device_t *dev )
 698 {
 699         drm_i830_private_t *dev_priv = dev->dev_private;
 700         drm_i830_sarea_t *sarea_priv = dev_priv->sarea_priv;
 701         unsigned int dirty = sarea_priv->dirty;
 702
 703         DRM_DEBUG("%s %x\n", __FUNCTION__, dirty);
 704
 705         if (dirty & I830_UPLOAD_BUFFERS) {
 706                 i830EmitDestVerified( dev, sarea_priv->BufferState );
 707                 sarea_priv->dirty &= ~I830_UPLOAD_BUFFERS;
 708         }
 709
 710         if (dirty & I830_UPLOAD_CTX) {
 711                 i830EmitContextVerified( dev, sarea_priv->ContextState );
 712                 sarea_priv->dirty &= ~I830_UPLOAD_CTX;
 713         }
 714
 715         if (dirty & I830_UPLOAD_TEX0) {
 716                 i830EmitTexVerified( dev, sarea_priv->TexState[0] );
 717                 sarea_priv->dirty &= ~I830_UPLOAD_TEX0;
 718         }
 719
 720         if (dirty & I830_UPLOAD_TEX1) {
 721                 i830EmitTexVerified( dev, sarea_priv->TexState[1] );
 722                 sarea_priv->dirty &= ~I830_UPLOAD_TEX1;
 723         }
 724
 725         if (dirty & I830_UPLOAD_TEXBLEND0) {
 726                 i830EmitTexBlendVerified( dev, sarea_priv->TexBlendState[0],
 727                                 sarea_priv->TexBlendStateWordsUsed[0]);
 728                 sarea_priv->dirty &= ~I830_UPLOAD_TEXBLEND0;
 729         }
 730
 731         if (dirty & I830_UPLOAD_TEXBLEND1) {
 732                 i830EmitTexBlendVerified( dev, sarea_priv->TexBlendState[1],
 733                                 sarea_priv->TexBlendStateWordsUsed[1]);
 734                 sarea_priv->dirty &= ~I830_UPLOAD_TEXBLEND1;
 735         }
 736
 737         if (dirty & I830_UPLOAD_TEX_PALETTE_SHARED) {
 738                 i830EmitTexPalette(dev, sarea_priv->Palette[0], 0, 1);
 739         } else {
 740                 if (dirty & I830_UPLOAD_TEX_PALETTE_N(0)) {
 741                         i830EmitTexPalette(dev, sarea_priv->Palette[0], 0, 0);
 742                         sarea_priv->dirty &= ~I830_UPLOAD_TEX_PALETTE_N(0);
 743                 }
 744                 if (dirty & I830_UPLOAD_TEX_PALETTE_N(1)) {
 745                         i830EmitTexPalette(dev, sarea_priv->Palette[1], 1, 0);
 746                         sarea_priv->dirty &= ~I830_UPLOAD_TEX_PALETTE_N(1);
 747                 }
 748
 749                 /* 1.3:
 750                  */
 751 #if 0
 752                 if (dirty & I830_UPLOAD_TEX_PALETTE_N(2)) {
 753                         i830EmitTexPalette(dev, sarea_priv->Palette2[0], 0, 0);
 754                         sarea_priv->dirty &= ~I830_UPLOAD_TEX_PALETTE_N(2);
 755                 }
 756                 if (dirty & I830_UPLOAD_TEX_PALETTE_N(3)) {
 757                         i830EmitTexPalette(dev, sarea_priv->Palette2[1], 1, 0);
 758                         sarea_priv->dirty &= ~I830_UPLOAD_TEX_PALETTE_N(2);
 759                 }
 760 #endif
 761         }
 762
 763         /* 1.3:
 764          */
 765         if (dirty & I830_UPLOAD_STIPPLE) {
 766                 i830EmitStippleVerified( dev,
 767                                          sarea_priv->StippleState);
 768                 sarea_priv->dirty &= ~I830_UPLOAD_STIPPLE;
 769         }
 770
 771         if (dirty & I830_UPLOAD_TEX2) {
 772                 i830EmitTexVerified( dev, sarea_priv->TexState2 );
 773                 sarea_priv->dirty &= ~I830_UPLOAD_TEX2;
 774         }
 775
 776         if (dirty & I830_UPLOAD_TEX3) {
 777                 i830EmitTexVerified( dev, sarea_priv->TexState3 );
 778                 sarea_priv->dirty &= ~I830_UPLOAD_TEX3;
 779         }
 780
 781
 782         if (dirty & I830_UPLOAD_TEXBLEND2) {
 783                 i830EmitTexBlendVerified(
 784                         dev,
 785                         sarea_priv->TexBlendState2,
 786                         sarea_priv->TexBlendStateWordsUsed2);
 787
 788                 sarea_priv->dirty &= ~I830_UPLOAD_TEXBLEND2;
 789         }
 790
 791         if (dirty & I830_UPLOAD_TEXBLEND3) {
 792                 i830EmitTexBlendVerified(
 793                         dev,
 794                         sarea_priv->TexBlendState3,
 795                         sarea_priv->TexBlendStateWordsUsed3);
 796                 sarea_priv->dirty &= ~I830_UPLOAD_TEXBLEND3;
 797         }
 798 }
 799
 800 /* ================================================================
 801  * Performance monitoring functions
 802  */
 803
 804 static void i830_fill_box( drm_device_t *dev,
 805                            int x, int y, int w, int h,
 806                            int r, int g, int b )
 807 {
 808         drm_i830_private_t *dev_priv = dev->dev_private;
 809         u32 color;
 810         unsigned int BR13, CMD;
 811         RING_LOCALS;
 812
 813         BR13 = (0xF0 << 16) | (dev_priv->pitch * dev_priv->cpp) | (1<<24);
 814         CMD = XY_COLOR_BLT_CMD;
 815         x += dev_priv->sarea_priv->boxes[0].x1;
 816         y += dev_priv->sarea_priv->boxes[0].y1;
 817
 818         if (dev_priv->cpp == 4) {
 819                 BR13 |= (1<<25);
 820                 CMD |= (XY_COLOR_BLT_WRITE_ALPHA | XY_COLOR_BLT_WRITE_RGB);
 821                 color = (((0xff) << 24) | (r << 16) | (g <<  8) | b);
 822         } else {
 823                 color = (((r & 0xf8) << 8) |
 824                          ((g & 0xfc) << 3) |
 825                          ((b & 0xf8) >> 3));
 826         }
 827
 828         BEGIN_LP_RING( 6 );
 829         OUT_RING( CMD );
 830         OUT_RING( BR13 );
 831         OUT_RING( (y << 16) | x );
 832         OUT_RING( ((y+h) << 16) | (x+w) );
 833
 834         if ( dev_priv->current_page == 1 ) {
 835                 OUT_RING( dev_priv->front_offset );
 836         } else {
 837                 OUT_RING( dev_priv->back_offset );
 838         }
 839
 840         OUT_RING( color );
 841         ADVANCE_LP_RING();
 842 }
 843
 844 static void i830_cp_performance_boxes( drm_device_t *dev )
 845 {
 846         drm_i830_private_t *dev_priv = dev->dev_private;
 847
 848         /* Purple box for page flipping
 849          */
 850         if ( dev_priv->sarea_priv->perf_boxes & I830_BOX_FLIP )
 851                 i830_fill_box( dev, 4, 4, 8, 8, 255, 0, 255 );
 852
 853         /* Red box if we have to wait for idle at any point
 854          */
 855         if ( dev_priv->sarea_priv->perf_boxes & I830_BOX_WAIT )
 856                 i830_fill_box( dev, 16, 4, 8, 8, 255, 0, 0 );
 857
 858         /* Blue box: lost context?
 859          */
 860         if ( dev_priv->sarea_priv->perf_boxes & I830_BOX_LOST_CONTEXT )
 861                 i830_fill_box( dev, 28, 4, 8, 8, 0, 0, 255 );
 862
 863         /* Yellow box for texture swaps
 864          */
 865         if ( dev_priv->sarea_priv->perf_boxes & I830_BOX_TEXTURE_LOAD )
 866                 i830_fill_box( dev, 40, 4, 8, 8, 255, 255, 0 );
 867
 868         /* Green box if hardware never idles (as far as we can tell)
 869          */
 870         if ( !(dev_priv->sarea_priv->perf_boxes & I830_BOX_RING_EMPTY) )
 871                 i830_fill_box( dev, 64, 4, 8, 8, 0, 255, 0 );
 872
 873
 874         /* Draw bars indicating number of buffers allocated
 875          * (not a great measure, easily confused)
 876          */
 877         if (dev_priv->dma_used) {
 878                 int bar = dev_priv->dma_used / 10240;
 879                 if (bar > 100) bar = 100;
 880                 if (bar < 1) bar = 1;
 881                 i830_fill_box( dev, 4, 16, bar, 4, 196, 128, 128 );
 882                 dev_priv->dma_used = 0;
 883         }
 884
 885         dev_priv->sarea_priv->perf_boxes = 0;
 886 }
 887
 888 static void i830_dma_dispatch_clear( drm_device_t *dev, int flags,
 889                                     unsigned int clear_color,
 890                                     unsigned int clear_zval,
 891                                     unsigned int clear_depthmask)
 892 {
 893         drm_i830_private_t *dev_priv = dev->dev_private;
 894         drm_i830_sarea_t *sarea_priv = dev_priv->sarea_priv;
 895         int nbox = sarea_priv->nbox;
 896         drm_clip_rect_t *pbox = sarea_priv->boxes;
 897         int pitch = dev_priv->pitch;
 898         int cpp = dev_priv->cpp;
 899         int i;
 900         unsigned int BR13, CMD, D_CMD;
 901         RING_LOCALS;
 902
 903
 904         if ( dev_priv->current_page == 1 ) {
 905                 unsigned int tmp = flags;
 906
 907                 flags &= ~(I830_FRONT | I830_BACK);
 908                 if ( tmp & I830_FRONT ) flags |= I830_BACK;
 909                 if ( tmp & I830_BACK )  flags |= I830_FRONT;
 910         }
 911
 912         i830_kernel_lost_context(dev);
 913
 914         switch(cpp) {
 915         case 2:
 916                 BR13 = (0xF0 << 16) | (pitch * cpp) | (1<<24);
 917                 D_CMD = CMD = XY_COLOR_BLT_CMD;
 918                 break;
 919         case 4:
 920                 BR13 = (0xF0 << 16) | (pitch * cpp) | (1<<24) | (1<<25);
 921                 CMD = (XY_COLOR_BLT_CMD | XY_COLOR_BLT_WRITE_ALPHA |
 922                        XY_COLOR_BLT_WRITE_RGB);
 923                 D_CMD = XY_COLOR_BLT_CMD;
 924                 if(clear_depthmask & 0x00ffffff)
 925                         D_CMD |= XY_COLOR_BLT_WRITE_RGB;
 926                 if(clear_depthmask & 0xff000000)
 927                         D_CMD |= XY_COLOR_BLT_WRITE_ALPHA;
 928                 break;
 929         default:
 930                 BR13 = (0xF0 << 16) | (pitch * cpp) | (1<<24);
 931                 D_CMD = CMD = XY_COLOR_BLT_CMD;
 932                 break;
 933         }
 934
 935         if (nbox > I830_NR_SAREA_CLIPRECTS)
 936                 nbox = I830_NR_SAREA_CLIPRECTS;
 937
 938         for (i = 0 ; i < nbox ; i++, pbox++) {
 939                 if (pbox->x1 > pbox->x2 ||
 940                     pbox->y1 > pbox->y2 ||
 941                     pbox->x2 > dev_priv->w ||
 942                     pbox->y2 > dev_priv->h)
 943                         continue;
 944
 945                 if ( flags & I830_FRONT ) {
 946                         DRM_DEBUG("clear front\n");
 947                         BEGIN_LP_RING( 6 );
 948                         OUT_RING( CMD );
 949                         OUT_RING( BR13 );
 950                         OUT_RING( (pbox->y1 << 16) | pbox->x1 );
 951                         OUT_RING( (pbox->y2 << 16) | pbox->x2 );
 952                         OUT_RING( dev_priv->front_offset );
 953                         OUT_RING( clear_color );
 954                         ADVANCE_LP_RING();
 955                 }
 956
 957                 if ( flags & I830_BACK ) {
 958                         DRM_DEBUG("clear back\n");
 959                         BEGIN_LP_RING( 6 );
 960                         OUT_RING( CMD );
 961                         OUT_RING( BR13 );
 962                         OUT_RING( (pbox->y1 << 16) | pbox->x1 );
 963                         OUT_RING( (pbox->y2 << 16) | pbox->x2 );
 964                         OUT_RING( dev_priv->back_offset );
 965                         OUT_RING( clear_color );
 966                         ADVANCE_LP_RING();
 967                 }
 968
 969                 if ( flags & I830_DEPTH ) {
 970                         DRM_DEBUG("clear depth\n");
 971                         BEGIN_LP_RING( 6 );
 972                         OUT_RING( D_CMD );
 973                         OUT_RING( BR13 );
 974                         OUT_RING( (pbox->y1 << 16) | pbox->x1 );
 975                         OUT_RING( (pbox->y2 << 16) | pbox->x2 );
 976                         OUT_RING( dev_priv->depth_offset );
 977                         OUT_RING( clear_zval );
 978                         ADVANCE_LP_RING();
 979                 }
 980         }
 981 }
 982
 983 static void i830_dma_dispatch_swap( drm_device_t *dev )
 984 {
 985         drm_i830_private_t *dev_priv = dev->dev_private;
 986         drm_i830_sarea_t *sarea_priv = dev_priv->sarea_priv;
 987         int nbox = sarea_priv->nbox;
 988         drm_clip_rect_t *pbox = sarea_priv->boxes;
 989         int pitch = dev_priv->pitch;
 990         int cpp = dev_priv->cpp;
 991         int i;
 992         unsigned int CMD, BR13;
 993         RING_LOCALS;
 994
 995         DRM_DEBUG("swapbuffers\n");
 996
 997         i830_kernel_lost_context(dev);
 998
 999         if (dev_priv->do_boxes)
1000                 i830_cp_performance_boxes( dev );
1001
1002         switch(cpp) {
1003         case 2:
1004                 BR13 = (pitch * cpp) | (0xCC << 16) | (1<<24);
1005                 CMD = XY_SRC_COPY_BLT_CMD;
1006                 break;
1007         case 4:
1008                 BR13 = (pitch * cpp) | (0xCC << 16) | (1<<24) | (1<<25);
1009                 CMD = (XY_SRC_COPY_BLT_CMD | XY_SRC_COPY_BLT_WRITE_ALPHA |
1010                        XY_SRC_COPY_BLT_WRITE_RGB);
1011                 break;
1012         default:
1013                 BR13 = (pitch * cpp) | (0xCC << 16) | (1<<24);
1014                 CMD = XY_SRC_COPY_BLT_CMD;
1015                 break;
1016         }
1017
1018
1019         if (nbox > I830_NR_SAREA_CLIPRECTS)
1020                 nbox = I830_NR_SAREA_CLIPRECTS;
1021
1022         for (i = 0 ; i < nbox; i++, pbox++)
1023         {
1024                 if (pbox->x1 > pbox->x2 ||
1025                     pbox->y1 > pbox->y2 ||
1026                     pbox->x2 > dev_priv->w ||
1027                     pbox->y2 > dev_priv->h)
1028                         continue;
1029
1030                 DRM_DEBUG("dispatch swap %d,%d-%d,%d!\n",
1031                           pbox->x1, pbox->y1,
1032                           pbox->x2, pbox->y2);
1033
1034                 BEGIN_LP_RING( 8 );
1035                 OUT_RING( CMD );
1036                 OUT_RING( BR13 );
1037                 OUT_RING( (pbox->y1 << 16) | pbox->x1 );
1038                 OUT_RING( (pbox->y2 << 16) | pbox->x2 );
1039
1040                 if (dev_priv->current_page == 0)
1041                         OUT_RING( dev_priv->front_offset );
1042                 else
1043                         OUT_RING( dev_priv->back_offset );
1044
1045                 OUT_RING( (pbox->y1 << 16) | pbox->x1 );
1046                 OUT_RING( BR13 & 0xffff );
1047
1048                 if (dev_priv->current_page == 0)
1049                         OUT_RING( dev_priv->back_offset );
1050                 else
1051                         OUT_RING( dev_priv->front_offset );
1052
1053                 ADVANCE_LP_RING();
1054         }
1055 }
1056
1057 static void i830_dma_dispatch_flip( drm_device_t *dev )
1058 {
1059         drm_i830_private_t *dev_priv = dev->dev_private;
1060         RING_LOCALS;
1061
1062         DRM_DEBUG( "%s: page=%d pfCurrentPage=%d\n",
1063                    __FUNCTION__,
1064                    dev_priv->current_page,
1065                    dev_priv->sarea_priv->pf_current_page);
1066
1067         i830_kernel_lost_context(dev);
1068
1069         if (dev_priv->do_boxes) {
1070                 dev_priv->sarea_priv->perf_boxes |= I830_BOX_FLIP;
1071                 i830_cp_performance_boxes( dev );
1072         }
1073
1074
1075         BEGIN_LP_RING( 2 );
1076         OUT_RING( INST_PARSER_CLIENT | INST_OP_FLUSH | INST_FLUSH_MAP_CACHE );
1077         OUT_RING( 0 );
1078         ADVANCE_LP_RING();
1079
1080         BEGIN_LP_RING( 6 );
1081         OUT_RING( CMD_OP_DISPLAYBUFFER_INFO | ASYNC_FLIP );
1082         OUT_RING( 0 );
1083         if ( dev_priv->current_page == 0 ) {
1084                 OUT_RING( dev_priv->back_offset );
1085                 dev_priv->current_page = 1;
1086         } else {
1087                 OUT_RING( dev_priv->front_offset );
1088                 dev_priv->current_page = 0;
1089         }
1090         OUT_RING(0);
1091         ADVANCE_LP_RING();
1092
1093
1094         BEGIN_LP_RING( 2 );
1095         OUT_RING( MI_WAIT_FOR_EVENT |
1096                   MI_WAIT_FOR_PLANE_A_FLIP );
1097         OUT_RING( 0 );
1098         ADVANCE_LP_RING();
1099
1100
1101         dev_priv->sarea_priv->pf_current_page = dev_priv->current_page;
1102 }
1103
1104 static void i830_dma_dispatch_vertex(drm_device_t *dev,
1105                                      drm_buf_t *buf,
1106                                      int discard,
1107                                      int used)
1108 {
1109         drm_i830_private_t *dev_priv = dev->dev_private;
1110         drm_i830_buf_priv_t *buf_priv = buf->dev_private;
1111         drm_i830_sarea_t *sarea_priv = dev_priv->sarea_priv;
1112         drm_clip_rect_t *box = sarea_priv->boxes;
1113         int nbox = sarea_priv->nbox;
1114         unsigned long address = (unsigned long)buf->bus_address;
1115         unsigned long start = address - dev->agp->base;
1116         int i = 0, u;
1117         RING_LOCALS;
1118
1119         i830_kernel_lost_context(dev);
1120
1121         if (nbox > I830_NR_SAREA_CLIPRECTS)
1122                 nbox = I830_NR_SAREA_CLIPRECTS;
1123
1124         if (discard) {
1125                 u = cmpxchg(buf_priv->in_use, I830_BUF_CLIENT,
1126                             I830_BUF_HARDWARE);
1127                 if(u != I830_BUF_CLIENT) {
1128                         DRM_DEBUG("xxxx 2\n");
1129                 }
1130         }
1131
1132         if (used > 4*1023)
1133                 used = 0;
1134
1135         if (sarea_priv->dirty)
1136            i830EmitState( dev );
1137
1138         DRM_DEBUG("dispatch vertex addr 0x%lx, used 0x%x nbox %d\n",
1139                   address, used, nbox);
1140
1141         dev_priv->counter++;
1142         DRM_DEBUG(  "dispatch counter : %ld\n", dev_priv->counter);
1143         DRM_DEBUG(  "i830_dma_dispatch\n");
1144         DRM_DEBUG(  "start : %lx\n", start);
1145         DRM_DEBUG(  "used : %d\n", used);
1146         DRM_DEBUG(  "start + used - 4 : %ld\n", start + used - 4);
1147
1148         if (buf_priv->currently_mapped == I830_BUF_MAPPED) {
1149                 u32 *vp = buf_priv->kernel_virtual;
1150
1151                 vp[0] = (GFX_OP_PRIMITIVE |
1152                         sarea_priv->vertex_prim |
1153                         ((used/4)-2));
1154
1155                 if (dev_priv->use_mi_batchbuffer_start) {
1156                         vp[used/4] = MI_BATCH_BUFFER_END;
1157                         used += 4;
1158                 }
1159
1160                 if (used & 4) {
1161                         vp[used/4] = 0;
1162                         used += 4;
1163                 }
1164
1165                 i830_unmap_buffer(buf);
1166         }
1167
1168         if (used) {
1169                 do {
1170                         if (i < nbox) {
1171                                 BEGIN_LP_RING(6);
1172                                 OUT_RING( GFX_OP_DRAWRECT_INFO );
1173                                 OUT_RING( sarea_priv->BufferState[I830_DESTREG_DR1] );
1174                                 OUT_RING( box[i].x1 | (box[i].y1<<16) );
1175                                 OUT_RING( box[i].x2 | (box[i].y2<<16) );
1176                                 OUT_RING( sarea_priv->BufferState[I830_DESTREG_DR4] );
1177                                 OUT_RING( 0 );
1178                                 ADVANCE_LP_RING();
1179                         }
1180
1181                         if (dev_priv->use_mi_batchbuffer_start) {
1182                                 BEGIN_LP_RING(2);
1183                                 OUT_RING( MI_BATCH_BUFFER_START | (2<<6) );
1184                                 OUT_RING( start | MI_BATCH_NON_SECURE );
1185                                 ADVANCE_LP_RING();
1186                         }
1187                         else {
1188                                 BEGIN_LP_RING(4);
1189                                 OUT_RING( MI_BATCH_BUFFER );
1190                                 OUT_RING( start | MI_BATCH_NON_SECURE );
1191                                 OUT_RING( start + used - 4 );
1192                                 OUT_RING( 0 );
1193                                 ADVANCE_LP_RING();
1194                         }
1195
1196                 } while (++i < nbox);
1197         }
1198
1199         if (discard) {
1200                 dev_priv->counter++;
1201
1202                 (void) cmpxchg(buf_priv->in_use, I830_BUF_CLIENT,
1203                                I830_BUF_HARDWARE);
1204
1205                 BEGIN_LP_RING(8);
1206                 OUT_RING( CMD_STORE_DWORD_IDX );
1207                 OUT_RING( 20 );
1208                 OUT_RING( dev_priv->counter );
1209                 OUT_RING( CMD_STORE_DWORD_IDX );
1210                 OUT_RING( buf_priv->my_use_idx );
1211                 OUT_RING( I830_BUF_FREE );
1212                 OUT_RING( CMD_REPORT_HEAD );
1213                 OUT_RING( 0 );
1214                 ADVANCE_LP_RING();
1215         }
1216 }
1217
1218
1219 static void i830_dma_quiescent(drm_device_t *dev)
1220 {
1221         drm_i830_private_t *dev_priv = dev->dev_private;
1222         RING_LOCALS;
1223
1224         i830_kernel_lost_context(dev);
1225
1226         BEGIN_LP_RING(4);
1227         OUT_RING( INST_PARSER_CLIENT | INST_OP_FLUSH | INST_FLUSH_MAP_CACHE );
1228         OUT_RING( CMD_REPORT_HEAD );
1229         OUT_RING( 0 );
1230         OUT_RING( 0 );
1231         ADVANCE_LP_RING();
1232
1233         i830_wait_ring( dev, dev_priv->ring.Size - 8, __FUNCTION__ );
1234 }
1235
1236 static int i830_flush_queue(drm_device_t *dev)
1237 {
1238         drm_i830_private_t *dev_priv = dev->dev_private;
1239         drm_device_dma_t *dma = dev->dma;
1240         int i, ret = 0;
1241         RING_LOCALS;
1242
1243         i830_kernel_lost_context(dev);
1244
1245         BEGIN_LP_RING(2);
1246         OUT_RING( CMD_REPORT_HEAD );
1247         OUT_RING( 0 );
1248         ADVANCE_LP_RING();
1249
1250         i830_wait_ring( dev, dev_priv->ring.Size - 8, __FUNCTION__ );
1251
1252         for (i = 0; i < dma->buf_count; i++) {
1253                 drm_buf_t *buf = dma->buflist[ i ];
1254                 drm_i830_buf_priv_t *buf_priv = buf->dev_private;
1255
1256                 int used = cmpxchg(buf_priv->in_use, I830_BUF_HARDWARE,
1257                                    I830_BUF_FREE);
1258
1259                 if (used == I830_BUF_HARDWARE)
1260                         DRM_DEBUG("reclaimed from HARDWARE\n");
1261                 if (used == I830_BUF_CLIENT)
1262                         DRM_DEBUG("still on client\n");
1263         }
1264
1265         return ret;
1266 }
1267
1268 /* Must be called with the lock held */
1269 void i830_reclaim_buffers(drm_device_t *dev, struct file *filp)
1270 {
1271         drm_device_dma_t *dma = dev->dma;
1272         int              i;
1273
1274         if (!dma) return;
1275         if (!dev->dev_private) return;
1276         if (!dma->buflist) return;
1277
1278         i830_flush_queue(dev);
1279
1280         for (i = 0; i < dma->buf_count; i++) {
1281                 drm_buf_t *buf = dma->buflist[ i ];
1282                 drm_i830_buf_priv_t *buf_priv = buf->dev_private;
1283
1284                 if (buf->filp == filp && buf_priv) {
1285                         int used = cmpxchg(buf_priv->in_use, I830_BUF_CLIENT,
1286                                            I830_BUF_FREE);
1287
1288                         if (used == I830_BUF_CLIENT)
1289                                 DRM_DEBUG("reclaimed from client\n");
1290                         if(buf_priv->currently_mapped == I830_BUF_MAPPED)
1291                                 buf_priv->currently_mapped = I830_BUF_UNMAPPED;
1292                 }
1293         }
1294 }
1295
1296 static int i830_flush_ioctl(struct inode *inode, struct file *filp,
1297                              unsigned int cmd, unsigned long arg)
1298 {
1299         drm_file_t        *priv   = filp->private_data;
1300         drm_device_t      *dev    = priv->head->dev;
1301
1302         LOCK_TEST_WITH_RETURN(dev, filp);
1303
1304         i830_flush_queue(dev);
1305         return 0;
1306 }
1307
1308 static int i830_dma_vertex(struct inode *inode, struct file *filp,
1309                        unsigned int cmd, unsigned long arg)
1310 {
1311         drm_file_t *priv = filp->private_data;
1312         drm_device_t *dev = priv->head->dev;
1313         drm_device_dma_t *dma = dev->dma;
1314         drm_i830_private_t *dev_priv = (drm_i830_private_t *)dev->dev_private;
1315         u32 *hw_status = dev_priv->hw_status_page;
1316         drm_i830_sarea_t *sarea_priv = (drm_i830_sarea_t *)
1317                                         dev_priv->sarea_priv;
1318         drm_i830_vertex_t vertex;
1319
1320         if (copy_from_user(&vertex, (drm_i830_vertex_t __user *)arg, sizeof(vertex)))
1321                 return -EFAULT;
1322
1323         LOCK_TEST_WITH_RETURN(dev, filp);
1324
1325         DRM_DEBUG("i830 dma vertex, idx %d used %d discard %d\n",
1326                   vertex.idx, vertex.used, vertex.discard);
1327
1328         if(vertex.idx < 0 || vertex.idx > dma->buf_count) return -EINVAL;
1329
1330         i830_dma_dispatch_vertex( dev,
1331                                   dma->buflist[ vertex.idx ],
1332                                   vertex.discard, vertex.used );
1333
1334         sarea_priv->last_enqueue = dev_priv->counter-1;
1335         sarea_priv->last_dispatch = (int) hw_status[5];
1336
1337         return 0;
1338 }
1339
1340 static int i830_clear_bufs(struct inode *inode, struct file *filp,
1341                            unsigned int cmd, unsigned long arg)
1342 {
1343         drm_file_t *priv = filp->private_data;
1344         drm_device_t *dev = priv->head->dev;
1345         drm_i830_clear_t clear;
1346
1347         if (copy_from_user(&clear, (drm_i830_clear_t __user *)arg, sizeof(clear)))
1348                 return -EFAULT;
1349
1350         LOCK_TEST_WITH_RETURN(dev, filp);
1351
1352         /* GH: Someone's doing nasty things... */
1353         if (!dev->dev_private) {
1354                 return -EINVAL;
1355         }
1356
1357         i830_dma_dispatch_clear( dev, clear.flags,
1358                                  clear.clear_color,
1359                                  clear.clear_depth,
1360                                  clear.clear_depthmask);
1361         return 0;
1362 }
1363
1364 static int i830_swap_bufs(struct inode *inode, struct file *filp,
1365                           unsigned int cmd, unsigned long arg)
1366 {
1367         drm_file_t *priv = filp->private_data;
1368         drm_device_t *dev = priv->head->dev;
1369
1370         DRM_DEBUG("i830_swap_bufs\n");
1371
1372         LOCK_TEST_WITH_RETURN(dev, filp);
1373
1374         i830_dma_dispatch_swap( dev );
1375         return 0;
1376 }
1377
1378
1379
1380 /* Not sure why this isn't set all the time:
1381  */
1382 static void i830_do_init_pageflip( drm_device_t *dev )
1383 {
1384         drm_i830_private_t *dev_priv = dev->dev_private;
1385
1386         DRM_DEBUG("%s\n", __FUNCTION__);
1387         dev_priv->page_flipping = 1;
1388         dev_priv->current_page = 0;
1389         dev_priv->sarea_priv->pf_current_page = dev_priv->current_page;
1390 }
1391
1392 static int i830_do_cleanup_pageflip( drm_device_t *dev )
1393 {
1394         drm_i830_private_t *dev_priv = dev->dev_private;
1395
1396         DRM_DEBUG("%s\n", __FUNCTION__);
1397         if (dev_priv->current_page != 0)
1398                 i830_dma_dispatch_flip( dev );
1399
1400         dev_priv->page_flipping = 0;
1401         return 0;
1402 }
1403
1404 static int i830_flip_bufs(struct inode *inode, struct file *filp,
1405                            unsigned int cmd, unsigned long arg)
1406 {
1407         drm_file_t *priv = filp->private_data;
1408         drm_device_t *dev = priv->head->dev;
1409         drm_i830_private_t *dev_priv = dev->dev_private;
1410
1411         DRM_DEBUG("%s\n", __FUNCTION__);
1412
1413         LOCK_TEST_WITH_RETURN(dev, filp);
1414
1415         if (!dev_priv->page_flipping)
1416                 i830_do_init_pageflip( dev );
1417
1418         i830_dma_dispatch_flip( dev );
1419         return 0;
1420 }
1421
1422 static int i830_getage(struct inode *inode, struct file *filp, unsigned int cmd,
1423                         unsigned long arg)
1424 {
1425         drm_file_t        *priv     = filp->private_data;
1426         drm_device_t      *dev      = priv->head->dev;
1427         drm_i830_private_t *dev_priv = (drm_i830_private_t *)dev->dev_private;
1428         u32 *hw_status = dev_priv->hw_status_page;
1429         drm_i830_sarea_t *sarea_priv = (drm_i830_sarea_t *)
1430                                         dev_priv->sarea_priv;
1431
1432         sarea_priv->last_dispatch = (int) hw_status[5];
1433         return 0;
1434 }
1435
1436 static int i830_getbuf(struct inode *inode, struct file *filp, unsigned int cmd,
1437                         unsigned long arg)
1438 {
1439         drm_file_t        *priv     = filp->private_data;
1440         drm_device_t      *dev      = priv->head->dev;
1441         int               retcode   = 0;
1442         drm_i830_dma_t    d;
1443         drm_i830_private_t *dev_priv = (drm_i830_private_t *)dev->dev_private;
1444         u32 *hw_status = dev_priv->hw_status_page;
1445         drm_i830_sarea_t *sarea_priv = (drm_i830_sarea_t *)
1446                                         dev_priv->sarea_priv;
1447
1448         DRM_DEBUG("getbuf\n");
1449         if (copy_from_user(&d, (drm_i830_dma_t __user *)arg, sizeof(d)))
1450                 return -EFAULT;
1451
1452         LOCK_TEST_WITH_RETURN(dev, filp);
1453
1454         d.granted = 0;
1455
1456         retcode = i830_dma_get_buffer(dev, &d, filp);
1457
1458         DRM_DEBUG("i830_dma: %d returning %d, granted = %d\n",
1459                   current->pid, retcode, d.granted);
1460
1461         if (copy_to_user((drm_dma_t __user *)arg, &d, sizeof(d)))
1462                 return -EFAULT;
1463         sarea_priv->last_dispatch = (int) hw_status[5];
1464
1465         return retcode;
1466 }
1467
1468 static int i830_copybuf(struct inode *inode,
1469                          struct file *filp, unsigned int cmd, unsigned long arg)
1470 {
1471         /* Never copy - 2.4.x doesn't need it */
1472         return 0;
1473 }
1474
1475 static int i830_docopy(struct inode *inode, struct file *filp, unsigned int cmd,
1476                         unsigned long arg)
1477 {
1478         return 0;
1479 }
1480
1481
1482
1483 static int i830_getparam( struct inode *inode, struct file *filp,
1484                         unsigned int cmd, unsigned long arg )
1485 {
1486         drm_file_t        *priv     = filp->private_data;
1487         drm_device_t      *dev      = priv->head->dev;
1488         drm_i830_private_t *dev_priv = dev->dev_private;
1489         drm_i830_getparam_t param;
1490         int value;
1491
1492         if ( !dev_priv ) {
1493                 DRM_ERROR( "%s called with no initialization\n", __FUNCTION__ );
1494                 return -EINVAL;
1495         }
1496
1497         if (copy_from_user(&param, (drm_i830_getparam_t __user *)arg, sizeof(param) ))
1498                 return -EFAULT;
1499
1500         switch( param.param ) {
1501         case I830_PARAM_IRQ_ACTIVE:
1502                 value = dev->irq_enabled;
1503                 break;
1504         default:
1505                 return -EINVAL;
1506         }
1507
1508         if ( copy_to_user( param.value, &value, sizeof(int) ) ) {
1509                 DRM_ERROR( "copy_to_user\n" );
1510                 return -EFAULT;
1511         }
1512
1513         return 0;
1514 }
1515
1516
1517 static int i830_setparam( struct inode *inode, struct file *filp,
1518                         unsigned int cmd, unsigned long arg )
1519 {
1520         drm_file_t        *priv     = filp->private_data;
1521         drm_device_t      *dev      = priv->head->dev;
1522         drm_i830_private_t *dev_priv = dev->dev_private;
1523         drm_i830_setparam_t param;
1524
1525         if ( !dev_priv ) {
1526                 DRM_ERROR( "%s called with no initialization\n", __FUNCTION__ );
1527                 return -EINVAL;
1528         }
1529
1530         if (copy_from_user(&param, (drm_i830_setparam_t __user *)arg, sizeof(param) ))
1531                 return -EFAULT;
1532
1533         switch( param.param ) {
1534         case I830_SETPARAM_USE_MI_BATCHBUFFER_START:
1535                 dev_priv->use_mi_batchbuffer_start = param.value;
1536                 break;
1537         default:
1538                 return -EINVAL;
1539         }
1540
1541         return 0;
1542 }
1543
1544
1545 void i830_driver_pretakedown(drm_device_t *dev)
1546 {
1547         i830_dma_cleanup( dev );
1548 }
1549
1550 void i830_driver_prerelease(drm_device_t *dev, DRMFILE filp)
1551 {
1552         if (dev->dev_private) {
1553                 drm_i830_private_t *dev_priv = dev->dev_private;
1554                 if (dev_priv->page_flipping) {
1555                         i830_do_cleanup_pageflip(dev);
1556                 }
1557         }
1558 }
1559
1560 void i830_driver_release(drm_device_t *dev, struct file *filp)
1561 {
1562         i830_reclaim_buffers(dev, filp);
1563 }
1564
1565 int i830_driver_dma_quiescent(drm_device_t *dev)
1566 {
1567         i830_dma_quiescent( dev );
1568         return 0;
1569 }
1570
1571 drm_ioctl_desc_t i830_ioctls[] = {
1572         [DRM_IOCTL_NR(DRM_I830_INIT)]     = { i830_dma_init,    1, 1 },
1573         [DRM_IOCTL_NR(DRM_I830_VERTEX)]   = { i830_dma_vertex,  1, 0 },
1574         [DRM_IOCTL_NR(DRM_I830_CLEAR)]    = { i830_clear_bufs,  1, 0 },
1575         [DRM_IOCTL_NR(DRM_I830_FLUSH)]    = { i830_flush_ioctl, 1, 0 },
1576         [DRM_IOCTL_NR(DRM_I830_GETAGE)]   = { i830_getage,      1, 0 },
1577         [DRM_IOCTL_NR(DRM_I830_GETBUF)]   = { i830_getbuf,      1, 0 },
1578         [DRM_IOCTL_NR(DRM_I830_SWAP)]     = { i830_swap_bufs,   1, 0 },
1579         [DRM_IOCTL_NR(DRM_I830_COPY)]     = { i830_copybuf,     1, 0 },
1580         [DRM_IOCTL_NR(DRM_I830_DOCOPY)]   = { i830_docopy,      1, 0 },
1581         [DRM_IOCTL_NR(DRM_I830_FLIP)]     = { i830_flip_bufs,   1, 0 },
1582         [DRM_IOCTL_NR(DRM_I830_IRQ_EMIT)] = { i830_irq_emit,    1, 0 },
1583         [DRM_IOCTL_NR(DRM_I830_IRQ_WAIT)] = { i830_irq_wait,    1, 0 },
1584         [DRM_IOCTL_NR(DRM_I830_GETPARAM)] = { i830_getparam,    1, 0 },
1585         [DRM_IOCTL_NR(DRM_I830_SETPARAM)] = { i830_setparam,    1, 0 }
1586 };
1587
1588 int i830_max_ioctl = DRM_ARRAY_SIZE(i830_ioctls);