git.oblomov.eu Git - linux-2.6/blob - drivers/char/drm/mga_state.c

   1 /* mga_state.c -- State support for MGA G200/G400 -*- linux-c -*-
   2  * Created: Thu Jan 27 02:53:43 2000 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  * VA LINUX SYSTEMS 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
  25  * OTHER DEALINGS IN THE SOFTWARE.
  26  *
  27  * Authors:
  28  *    Jeff Hartmann <jhartmann@valinux.com>
  29  *    Keith Whitwell <keith@tungstengraphics.com>
  30  *
  31  * Rewritten by:
  32  *    Gareth Hughes <gareth@valinux.com>
  33  */
  34
  35 #include "drmP.h"
  36 #include "drm.h"
  37 #include "mga_drm.h"
  38 #include "mga_drv.h"
  39
  40 /* ================================================================
  41  * DMA hardware state programming functions
  42  */
  43
  44 static void mga_emit_clip_rect(drm_mga_private_t * dev_priv,
  45                                struct drm_clip_rect * box)
  46 {
  47         drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
  48         drm_mga_context_regs_t *ctx = &sarea_priv->context_state;
  49         unsigned int pitch = dev_priv->front_pitch;
  50         DMA_LOCALS;
  51
  52         BEGIN_DMA(2);
  53
  54         /* Force reset of DWGCTL on G400 (eliminates clip disable bit).
  55          */
  56         if (dev_priv->chipset >= MGA_CARD_TYPE_G400) {
  57                 DMA_BLOCK(MGA_DWGCTL, ctx->dwgctl,
  58                           MGA_LEN + MGA_EXEC, 0x80000000,
  59                           MGA_DWGCTL, ctx->dwgctl,
  60                           MGA_LEN + MGA_EXEC, 0x80000000);
  61         }
  62         DMA_BLOCK(MGA_DMAPAD, 0x00000000,
  63                   MGA_CXBNDRY, ((box->x2 - 1) << 16) | box->x1,
  64                   MGA_YTOP, box->y1 * pitch, MGA_YBOT, (box->y2 - 1) * pitch);
  65
  66         ADVANCE_DMA();
  67 }
  68
  69 static __inline__ void mga_g200_emit_context(drm_mga_private_t * dev_priv)
  70 {
  71         drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
  72         drm_mga_context_regs_t *ctx = &sarea_priv->context_state;
  73         DMA_LOCALS;
  74
  75         BEGIN_DMA(3);
  76
  77         DMA_BLOCK(MGA_DSTORG, ctx->dstorg,
  78                   MGA_MACCESS, ctx->maccess,
  79                   MGA_PLNWT, ctx->plnwt, MGA_DWGCTL, ctx->dwgctl);
  80
  81         DMA_BLOCK(MGA_ALPHACTRL, ctx->alphactrl,
  82                   MGA_FOGCOL, ctx->fogcolor,
  83                   MGA_WFLAG, ctx->wflag, MGA_ZORG, dev_priv->depth_offset);
  84
  85         DMA_BLOCK(MGA_FCOL, ctx->fcol,
  86                   MGA_DMAPAD, 0x00000000,
  87                   MGA_DMAPAD, 0x00000000, MGA_DMAPAD, 0x00000000);
  88
  89         ADVANCE_DMA();
  90 }
  91
  92 static __inline__ void mga_g400_emit_context(drm_mga_private_t * dev_priv)
  93 {
  94         drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
  95         drm_mga_context_regs_t *ctx = &sarea_priv->context_state;
  96         DMA_LOCALS;
  97
  98         BEGIN_DMA(4);
  99
 100         DMA_BLOCK(MGA_DSTORG, ctx->dstorg,
 101                   MGA_MACCESS, ctx->maccess,
 102                   MGA_PLNWT, ctx->plnwt, MGA_DWGCTL, ctx->dwgctl);
 103
 104         DMA_BLOCK(MGA_ALPHACTRL, ctx->alphactrl,
 105                   MGA_FOGCOL, ctx->fogcolor,
 106                   MGA_WFLAG, ctx->wflag, MGA_ZORG, dev_priv->depth_offset);
 107
 108         DMA_BLOCK(MGA_WFLAG1, ctx->wflag,
 109                   MGA_TDUALSTAGE0, ctx->tdualstage0,
 110                   MGA_TDUALSTAGE1, ctx->tdualstage1, MGA_FCOL, ctx->fcol);
 111
 112         DMA_BLOCK(MGA_STENCIL, ctx->stencil,
 113                   MGA_STENCILCTL, ctx->stencilctl,
 114                   MGA_DMAPAD, 0x00000000, MGA_DMAPAD, 0x00000000);
 115
 116         ADVANCE_DMA();
 117 }
 118
 119 static __inline__ void mga_g200_emit_tex0(drm_mga_private_t * dev_priv)
 120 {
 121         drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
 122         drm_mga_texture_regs_t *tex = &sarea_priv->tex_state[0];
 123         DMA_LOCALS;
 124
 125         BEGIN_DMA(4);
 126
 127         DMA_BLOCK(MGA_TEXCTL2, tex->texctl2,
 128                   MGA_TEXCTL, tex->texctl,
 129                   MGA_TEXFILTER, tex->texfilter,
 130                   MGA_TEXBORDERCOL, tex->texbordercol);
 131
 132         DMA_BLOCK(MGA_TEXORG, tex->texorg,
 133                   MGA_TEXORG1, tex->texorg1,
 134                   MGA_TEXORG2, tex->texorg2, MGA_TEXORG3, tex->texorg3);
 135
 136         DMA_BLOCK(MGA_TEXORG4, tex->texorg4,
 137                   MGA_TEXWIDTH, tex->texwidth,
 138                   MGA_TEXHEIGHT, tex->texheight, MGA_WR24, tex->texwidth);
 139
 140         DMA_BLOCK(MGA_WR34, tex->texheight,
 141                   MGA_TEXTRANS, 0x0000ffff,
 142                   MGA_TEXTRANSHIGH, 0x0000ffff, MGA_DMAPAD, 0x00000000);
 143
 144         ADVANCE_DMA();
 145 }
 146
 147 static __inline__ void mga_g400_emit_tex0(drm_mga_private_t * dev_priv)
 148 {
 149         drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
 150         drm_mga_texture_regs_t *tex = &sarea_priv->tex_state[0];
 151         DMA_LOCALS;
 152
 153 /*      printk("mga_g400_emit_tex0 %x %x %x\n", tex->texorg, */
 154 /*             tex->texctl, tex->texctl2); */
 155
 156         BEGIN_DMA(6);
 157
 158         DMA_BLOCK(MGA_TEXCTL2, tex->texctl2 | MGA_G400_TC2_MAGIC,
 159                   MGA_TEXCTL, tex->texctl,
 160                   MGA_TEXFILTER, tex->texfilter,
 161                   MGA_TEXBORDERCOL, tex->texbordercol);
 162
 163         DMA_BLOCK(MGA_TEXORG, tex->texorg,
 164                   MGA_TEXORG1, tex->texorg1,
 165                   MGA_TEXORG2, tex->texorg2, MGA_TEXORG3, tex->texorg3);
 166
 167         DMA_BLOCK(MGA_TEXORG4, tex->texorg4,
 168                   MGA_TEXWIDTH, tex->texwidth,
 169                   MGA_TEXHEIGHT, tex->texheight, MGA_WR49, 0x00000000);
 170
 171         DMA_BLOCK(MGA_WR57, 0x00000000,
 172                   MGA_WR53, 0x00000000,
 173                   MGA_WR61, 0x00000000, MGA_WR52, MGA_G400_WR_MAGIC);
 174
 175         DMA_BLOCK(MGA_WR60, MGA_G400_WR_MAGIC,
 176                   MGA_WR54, tex->texwidth | MGA_G400_WR_MAGIC,
 177                   MGA_WR62, tex->texheight | MGA_G400_WR_MAGIC,
 178                   MGA_DMAPAD, 0x00000000);
 179
 180         DMA_BLOCK(MGA_DMAPAD, 0x00000000,
 181                   MGA_DMAPAD, 0x00000000,
 182                   MGA_TEXTRANS, 0x0000ffff, MGA_TEXTRANSHIGH, 0x0000ffff);
 183
 184         ADVANCE_DMA();
 185 }
 186
 187 static __inline__ void mga_g400_emit_tex1(drm_mga_private_t * dev_priv)
 188 {
 189         drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
 190         drm_mga_texture_regs_t *tex = &sarea_priv->tex_state[1];
 191         DMA_LOCALS;
 192
 193 /*      printk("mga_g400_emit_tex1 %x %x %x\n", tex->texorg,  */
 194 /*             tex->texctl, tex->texctl2); */
 195
 196         BEGIN_DMA(5);
 197
 198         DMA_BLOCK(MGA_TEXCTL2, (tex->texctl2 |
 199                                 MGA_MAP1_ENABLE |
 200                                 MGA_G400_TC2_MAGIC),
 201                   MGA_TEXCTL, tex->texctl,
 202                   MGA_TEXFILTER, tex->texfilter,
 203                   MGA_TEXBORDERCOL, tex->texbordercol);
 204
 205         DMA_BLOCK(MGA_TEXORG, tex->texorg,
 206                   MGA_TEXORG1, tex->texorg1,
 207                   MGA_TEXORG2, tex->texorg2, MGA_TEXORG3, tex->texorg3);
 208
 209         DMA_BLOCK(MGA_TEXORG4, tex->texorg4,
 210                   MGA_TEXWIDTH, tex->texwidth,
 211                   MGA_TEXHEIGHT, tex->texheight, MGA_WR49, 0x00000000);
 212
 213         DMA_BLOCK(MGA_WR57, 0x00000000,
 214                   MGA_WR53, 0x00000000,
 215                   MGA_WR61, 0x00000000,
 216                   MGA_WR52, tex->texwidth | MGA_G400_WR_MAGIC);
 217
 218         DMA_BLOCK(MGA_WR60, tex->texheight | MGA_G400_WR_MAGIC,
 219                   MGA_TEXTRANS, 0x0000ffff,
 220                   MGA_TEXTRANSHIGH, 0x0000ffff,
 221                   MGA_TEXCTL2, tex->texctl2 | MGA_G400_TC2_MAGIC);
 222
 223         ADVANCE_DMA();
 224 }
 225
 226 static __inline__ void mga_g200_emit_pipe(drm_mga_private_t * dev_priv)
 227 {
 228         drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
 229         unsigned int pipe = sarea_priv->warp_pipe;
 230         DMA_LOCALS;
 231
 232         BEGIN_DMA(3);
 233
 234         DMA_BLOCK(MGA_WIADDR, MGA_WMODE_SUSPEND,
 235                   MGA_WVRTXSZ, 0x00000007,
 236                   MGA_WFLAG, 0x00000000, MGA_WR24, 0x00000000);
 237
 238         DMA_BLOCK(MGA_WR25, 0x00000100,
 239                   MGA_WR34, 0x00000000,
 240                   MGA_WR42, 0x0000ffff, MGA_WR60, 0x0000ffff);
 241
 242         /* Padding required to to hardware bug.
 243          */
 244         DMA_BLOCK(MGA_DMAPAD, 0xffffffff,
 245                   MGA_DMAPAD, 0xffffffff,
 246                   MGA_DMAPAD, 0xffffffff,
 247                   MGA_WIADDR, (dev_priv->warp_pipe_phys[pipe] |
 248                                MGA_WMODE_START | dev_priv->wagp_enable));
 249
 250         ADVANCE_DMA();
 251 }
 252
 253 static __inline__ void mga_g400_emit_pipe(drm_mga_private_t * dev_priv)
 254 {
 255         drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
 256         unsigned int pipe = sarea_priv->warp_pipe;
 257         DMA_LOCALS;
 258
 259 /*      printk("mga_g400_emit_pipe %x\n", pipe); */
 260
 261         BEGIN_DMA(10);
 262
 263         DMA_BLOCK(MGA_WIADDR2, MGA_WMODE_SUSPEND,
 264                   MGA_DMAPAD, 0x00000000,
 265                   MGA_DMAPAD, 0x00000000, MGA_DMAPAD, 0x00000000);
 266
 267         if (pipe & MGA_T2) {
 268                 DMA_BLOCK(MGA_WVRTXSZ, 0x00001e09,
 269                           MGA_DMAPAD, 0x00000000,
 270                           MGA_DMAPAD, 0x00000000, MGA_DMAPAD, 0x00000000);
 271
 272                 DMA_BLOCK(MGA_WACCEPTSEQ, 0x00000000,
 273                           MGA_WACCEPTSEQ, 0x00000000,
 274                           MGA_WACCEPTSEQ, 0x00000000,
 275                           MGA_WACCEPTSEQ, 0x1e000000);
 276         } else {
 277                 if (dev_priv->warp_pipe & MGA_T2) {
 278                         /* Flush the WARP pipe */
 279                         DMA_BLOCK(MGA_YDST, 0x00000000,
 280                                   MGA_FXLEFT, 0x00000000,
 281                                   MGA_FXRIGHT, 0x00000001,
 282                                   MGA_DWGCTL, MGA_DWGCTL_FLUSH);
 283
 284                         DMA_BLOCK(MGA_LEN + MGA_EXEC, 0x00000001,
 285                                   MGA_DWGSYNC, 0x00007000,
 286                                   MGA_TEXCTL2, MGA_G400_TC2_MAGIC,
 287                                   MGA_LEN + MGA_EXEC, 0x00000000);
 288
 289                         DMA_BLOCK(MGA_TEXCTL2, (MGA_DUALTEX |
 290                                                 MGA_G400_TC2_MAGIC),
 291                                   MGA_LEN + MGA_EXEC, 0x00000000,
 292                                   MGA_TEXCTL2, MGA_G400_TC2_MAGIC,
 293                                   MGA_DMAPAD, 0x00000000);
 294                 }
 295
 296                 DMA_BLOCK(MGA_WVRTXSZ, 0x00001807,
 297                           MGA_DMAPAD, 0x00000000,
 298                           MGA_DMAPAD, 0x00000000, MGA_DMAPAD, 0x00000000);
 299
 300                 DMA_BLOCK(MGA_WACCEPTSEQ, 0x00000000,
 301                           MGA_WACCEPTSEQ, 0x00000000,
 302                           MGA_WACCEPTSEQ, 0x00000000,
 303                           MGA_WACCEPTSEQ, 0x18000000);
 304         }
 305
 306         DMA_BLOCK(MGA_WFLAG, 0x00000000,
 307                   MGA_WFLAG1, 0x00000000,
 308                   MGA_WR56, MGA_G400_WR56_MAGIC, MGA_DMAPAD, 0x00000000);
 309
 310         DMA_BLOCK(MGA_WR49, 0x00000000, /* tex0              */
 311                   MGA_WR57, 0x00000000, /* tex0              */
 312                   MGA_WR53, 0x00000000, /* tex1              */
 313                   MGA_WR61, 0x00000000);        /* tex1              */
 314
 315         DMA_BLOCK(MGA_WR54, MGA_G400_WR_MAGIC,  /* tex0 width        */
 316                   MGA_WR62, MGA_G400_WR_MAGIC,  /* tex0 height       */
 317                   MGA_WR52, MGA_G400_WR_MAGIC,  /* tex1 width        */
 318                   MGA_WR60, MGA_G400_WR_MAGIC); /* tex1 height       */
 319
 320         /* Padding required to to hardware bug */
 321         DMA_BLOCK(MGA_DMAPAD, 0xffffffff,
 322                   MGA_DMAPAD, 0xffffffff,
 323                   MGA_DMAPAD, 0xffffffff,
 324                   MGA_WIADDR2, (dev_priv->warp_pipe_phys[pipe] |
 325                                 MGA_WMODE_START | dev_priv->wagp_enable));
 326
 327         ADVANCE_DMA();
 328 }
 329
 330 static void mga_g200_emit_state(drm_mga_private_t * dev_priv)
 331 {
 332         drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
 333         unsigned int dirty = sarea_priv->dirty;
 334
 335         if (sarea_priv->warp_pipe != dev_priv->warp_pipe) {
 336                 mga_g200_emit_pipe(dev_priv);
 337                 dev_priv->warp_pipe = sarea_priv->warp_pipe;
 338         }
 339
 340         if (dirty & MGA_UPLOAD_CONTEXT) {
 341                 mga_g200_emit_context(dev_priv);
 342                 sarea_priv->dirty &= ~MGA_UPLOAD_CONTEXT;
 343         }
 344
 345         if (dirty & MGA_UPLOAD_TEX0) {
 346                 mga_g200_emit_tex0(dev_priv);
 347                 sarea_priv->dirty &= ~MGA_UPLOAD_TEX0;
 348         }
 349 }
 350
 351 static void mga_g400_emit_state(drm_mga_private_t * dev_priv)
 352 {
 353         drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
 354         unsigned int dirty = sarea_priv->dirty;
 355         int multitex = sarea_priv->warp_pipe & MGA_T2;
 356
 357         if (sarea_priv->warp_pipe != dev_priv->warp_pipe) {
 358                 mga_g400_emit_pipe(dev_priv);
 359                 dev_priv->warp_pipe = sarea_priv->warp_pipe;
 360         }
 361
 362         if (dirty & MGA_UPLOAD_CONTEXT) {
 363                 mga_g400_emit_context(dev_priv);
 364                 sarea_priv->dirty &= ~MGA_UPLOAD_CONTEXT;
 365         }
 366
 367         if (dirty & MGA_UPLOAD_TEX0) {
 368                 mga_g400_emit_tex0(dev_priv);
 369                 sarea_priv->dirty &= ~MGA_UPLOAD_TEX0;
 370         }
 371
 372         if ((dirty & MGA_UPLOAD_TEX1) && multitex) {
 373                 mga_g400_emit_tex1(dev_priv);
 374                 sarea_priv->dirty &= ~MGA_UPLOAD_TEX1;
 375         }
 376 }
 377
 378 /* ================================================================
 379  * SAREA state verification
 380  */
 381
 382 /* Disallow all write destinations except the front and backbuffer.
 383  */
 384 static int mga_verify_context(drm_mga_private_t * dev_priv)
 385 {
 386         drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
 387         drm_mga_context_regs_t *ctx = &sarea_priv->context_state;
 388
 389         if (ctx->dstorg != dev_priv->front_offset &&
 390             ctx->dstorg != dev_priv->back_offset) {
 391                 DRM_ERROR("*** bad DSTORG: %x (front %x, back %x)\n\n",
 392                           ctx->dstorg, dev_priv->front_offset,
 393                           dev_priv->back_offset);
 394                 ctx->dstorg = 0;
 395                 return -EINVAL;
 396         }
 397
 398         return 0;
 399 }
 400
 401 /* Disallow texture reads from PCI space.
 402  */
 403 static int mga_verify_tex(drm_mga_private_t * dev_priv, int unit)
 404 {
 405         drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
 406         drm_mga_texture_regs_t *tex = &sarea_priv->tex_state[unit];
 407         unsigned int org;
 408
 409         org = tex->texorg & (MGA_TEXORGMAP_MASK | MGA_TEXORGACC_MASK);
 410
 411         if (org == (MGA_TEXORGMAP_SYSMEM | MGA_TEXORGACC_PCI)) {
 412                 DRM_ERROR("*** bad TEXORG: 0x%x, unit %d\n", tex->texorg, unit);
 413                 tex->texorg = 0;
 414                 return -EINVAL;
 415         }
 416
 417         return 0;
 418 }
 419
 420 static int mga_verify_state(drm_mga_private_t * dev_priv)
 421 {
 422         drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
 423         unsigned int dirty = sarea_priv->dirty;
 424         int ret = 0;
 425
 426         if (sarea_priv->nbox > MGA_NR_SAREA_CLIPRECTS)
 427                 sarea_priv->nbox = MGA_NR_SAREA_CLIPRECTS;
 428
 429         if (dirty & MGA_UPLOAD_CONTEXT)
 430                 ret |= mga_verify_context(dev_priv);
 431
 432         if (dirty & MGA_UPLOAD_TEX0)
 433                 ret |= mga_verify_tex(dev_priv, 0);
 434
 435         if (dev_priv->chipset >= MGA_CARD_TYPE_G400) {
 436                 if (dirty & MGA_UPLOAD_TEX1)
 437                         ret |= mga_verify_tex(dev_priv, 1);
 438
 439                 if (dirty & MGA_UPLOAD_PIPE)
 440                         ret |= (sarea_priv->warp_pipe > MGA_MAX_G400_PIPES);
 441         } else {
 442                 if (dirty & MGA_UPLOAD_PIPE)
 443                         ret |= (sarea_priv->warp_pipe > MGA_MAX_G200_PIPES);
 444         }
 445
 446         return (ret == 0);
 447 }
 448
 449 static int mga_verify_iload(drm_mga_private_t * dev_priv,
 450                             unsigned int dstorg, unsigned int length)
 451 {
 452         if (dstorg < dev_priv->texture_offset ||
 453             dstorg + length > (dev_priv->texture_offset +
 454                                dev_priv->texture_size)) {
 455                 DRM_ERROR("*** bad iload DSTORG: 0x%x\n", dstorg);
 456                 return -EINVAL;
 457         }
 458
 459         if (length & MGA_ILOAD_MASK) {
 460                 DRM_ERROR("*** bad iload length: 0x%x\n",
 461                           length & MGA_ILOAD_MASK);
 462                 return -EINVAL;
 463         }
 464
 465         return 0;
 466 }
 467
 468 static int mga_verify_blit(drm_mga_private_t * dev_priv,
 469                            unsigned int srcorg, unsigned int dstorg)
 470 {
 471         if ((srcorg & 0x3) == (MGA_SRCACC_PCI | MGA_SRCMAP_SYSMEM) ||
 472             (dstorg & 0x3) == (MGA_SRCACC_PCI | MGA_SRCMAP_SYSMEM)) {
 473                 DRM_ERROR("*** bad blit: src=0x%x dst=0x%x\n", srcorg, dstorg);
 474                 return -EINVAL;
 475         }
 476         return 0;
 477 }
 478
 479 /* ================================================================
 480  *
 481  */
 482
 483 static void mga_dma_dispatch_clear(struct drm_device * dev, drm_mga_clear_t * clear)
 484 {
 485         drm_mga_private_t *dev_priv = dev->dev_private;
 486         drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
 487         drm_mga_context_regs_t *ctx = &sarea_priv->context_state;
 488         struct drm_clip_rect *pbox = sarea_priv->boxes;
 489         int nbox = sarea_priv->nbox;
 490         int i;
 491         DMA_LOCALS;
 492         DRM_DEBUG("\n");
 493
 494         BEGIN_DMA(1);
 495
 496         DMA_BLOCK(MGA_DMAPAD, 0x00000000,
 497                   MGA_DMAPAD, 0x00000000,
 498                   MGA_DWGSYNC, 0x00007100, MGA_DWGSYNC, 0x00007000);
 499
 500         ADVANCE_DMA();
 501
 502         for (i = 0; i < nbox; i++) {
 503                 struct drm_clip_rect *box = &pbox[i];
 504                 u32 height = box->y2 - box->y1;
 505
 506                 DRM_DEBUG("   from=%d,%d to=%d,%d\n",
 507                           box->x1, box->y1, box->x2, box->y2);
 508
 509                 if (clear->flags & MGA_FRONT) {
 510                         BEGIN_DMA(2);
 511
 512                         DMA_BLOCK(MGA_DMAPAD, 0x00000000,
 513                                   MGA_PLNWT, clear->color_mask,
 514                                   MGA_YDSTLEN, (box->y1 << 16) | height,
 515                                   MGA_FXBNDRY, (box->x2 << 16) | box->x1);
 516
 517                         DMA_BLOCK(MGA_DMAPAD, 0x00000000,
 518                                   MGA_FCOL, clear->clear_color,
 519                                   MGA_DSTORG, dev_priv->front_offset,
 520                                   MGA_DWGCTL + MGA_EXEC, dev_priv->clear_cmd);
 521
 522                         ADVANCE_DMA();
 523                 }
 524
 525                 if (clear->flags & MGA_BACK) {
 526                         BEGIN_DMA(2);
 527
 528                         DMA_BLOCK(MGA_DMAPAD, 0x00000000,
 529                                   MGA_PLNWT, clear->color_mask,
 530                                   MGA_YDSTLEN, (box->y1 << 16) | height,
 531                                   MGA_FXBNDRY, (box->x2 << 16) | box->x1);
 532
 533                         DMA_BLOCK(MGA_DMAPAD, 0x00000000,
 534                                   MGA_FCOL, clear->clear_color,
 535                                   MGA_DSTORG, dev_priv->back_offset,
 536                                   MGA_DWGCTL + MGA_EXEC, dev_priv->clear_cmd);
 537
 538                         ADVANCE_DMA();
 539                 }
 540
 541                 if (clear->flags & MGA_DEPTH) {
 542                         BEGIN_DMA(2);
 543
 544                         DMA_BLOCK(MGA_DMAPAD, 0x00000000,
 545                                   MGA_PLNWT, clear->depth_mask,
 546                                   MGA_YDSTLEN, (box->y1 << 16) | height,
 547                                   MGA_FXBNDRY, (box->x2 << 16) | box->x1);
 548
 549                         DMA_BLOCK(MGA_DMAPAD, 0x00000000,
 550                                   MGA_FCOL, clear->clear_depth,
 551                                   MGA_DSTORG, dev_priv->depth_offset,
 552                                   MGA_DWGCTL + MGA_EXEC, dev_priv->clear_cmd);
 553
 554                         ADVANCE_DMA();
 555                 }
 556
 557         }
 558
 559         BEGIN_DMA(1);
 560
 561         /* Force reset of DWGCTL */
 562         DMA_BLOCK(MGA_DMAPAD, 0x00000000,
 563                   MGA_DMAPAD, 0x00000000,
 564                   MGA_PLNWT, ctx->plnwt, MGA_DWGCTL, ctx->dwgctl);
 565
 566         ADVANCE_DMA();
 567
 568         FLUSH_DMA();
 569 }
 570
 571 static void mga_dma_dispatch_swap(struct drm_device * dev)
 572 {
 573         drm_mga_private_t *dev_priv = dev->dev_private;
 574         drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
 575         drm_mga_context_regs_t *ctx = &sarea_priv->context_state;
 576         struct drm_clip_rect *pbox = sarea_priv->boxes;
 577         int nbox = sarea_priv->nbox;
 578         int i;
 579         DMA_LOCALS;
 580         DRM_DEBUG("\n");
 581
 582         sarea_priv->last_frame.head = dev_priv->prim.tail;
 583         sarea_priv->last_frame.wrap = dev_priv->prim.last_wrap;
 584
 585         BEGIN_DMA(4 + nbox);
 586
 587         DMA_BLOCK(MGA_DMAPAD, 0x00000000,
 588                   MGA_DMAPAD, 0x00000000,
 589                   MGA_DWGSYNC, 0x00007100, MGA_DWGSYNC, 0x00007000);
 590
 591         DMA_BLOCK(MGA_DSTORG, dev_priv->front_offset,
 592                   MGA_MACCESS, dev_priv->maccess,
 593                   MGA_SRCORG, dev_priv->back_offset,
 594                   MGA_AR5, dev_priv->front_pitch);
 595
 596         DMA_BLOCK(MGA_DMAPAD, 0x00000000,
 597                   MGA_DMAPAD, 0x00000000,
 598                   MGA_PLNWT, 0xffffffff, MGA_DWGCTL, MGA_DWGCTL_COPY);
 599
 600         for (i = 0; i < nbox; i++) {
 601                 struct drm_clip_rect *box = &pbox[i];
 602                 u32 height = box->y2 - box->y1;
 603                 u32 start = box->y1 * dev_priv->front_pitch;
 604
 605                 DRM_DEBUG("   from=%d,%d to=%d,%d\n",
 606                           box->x1, box->y1, box->x2, box->y2);
 607
 608                 DMA_BLOCK(MGA_AR0, start + box->x2 - 1,
 609                           MGA_AR3, start + box->x1,
 610                           MGA_FXBNDRY, ((box->x2 - 1) << 16) | box->x1,
 611                           MGA_YDSTLEN + MGA_EXEC, (box->y1 << 16) | height);
 612         }
 613
 614         DMA_BLOCK(MGA_DMAPAD, 0x00000000,
 615                   MGA_PLNWT, ctx->plnwt,
 616                   MGA_SRCORG, dev_priv->front_offset, MGA_DWGCTL, ctx->dwgctl);
 617
 618         ADVANCE_DMA();
 619
 620         FLUSH_DMA();
 621
 622         DRM_DEBUG("%s... done.\n", __FUNCTION__);
 623 }
 624
 625 static void mga_dma_dispatch_vertex(struct drm_device * dev, struct drm_buf * buf)
 626 {
 627         drm_mga_private_t *dev_priv = dev->dev_private;
 628         drm_mga_buf_priv_t *buf_priv = buf->dev_private;
 629         drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
 630         u32 address = (u32) buf->bus_address;
 631         u32 length = (u32) buf->used;
 632         int i = 0;
 633         DMA_LOCALS;
 634         DRM_DEBUG("vertex: buf=%d used=%d\n", buf->idx, buf->used);
 635
 636         if (buf->used) {
 637                 buf_priv->dispatched = 1;
 638
 639                 MGA_EMIT_STATE(dev_priv, sarea_priv->dirty);
 640
 641                 do {
 642                         if (i < sarea_priv->nbox) {
 643                                 mga_emit_clip_rect(dev_priv,
 644                                                    &sarea_priv->boxes[i]);
 645                         }
 646
 647                         BEGIN_DMA(1);
 648
 649                         DMA_BLOCK(MGA_DMAPAD, 0x00000000,
 650                                   MGA_DMAPAD, 0x00000000,
 651                                   MGA_SECADDRESS, (address |
 652                                                    MGA_DMA_VERTEX),
 653                                   MGA_SECEND, ((address + length) |
 654                                                dev_priv->dma_access));
 655
 656                         ADVANCE_DMA();
 657                 } while (++i < sarea_priv->nbox);
 658         }
 659
 660         if (buf_priv->discard) {
 661                 AGE_BUFFER(buf_priv);
 662                 buf->pending = 0;
 663                 buf->used = 0;
 664                 buf_priv->dispatched = 0;
 665
 666                 mga_freelist_put(dev, buf);
 667         }
 668
 669         FLUSH_DMA();
 670 }
 671
 672 static void mga_dma_dispatch_indices(struct drm_device * dev, struct drm_buf * buf,
 673                                      unsigned int start, unsigned int end)
 674 {
 675         drm_mga_private_t *dev_priv = dev->dev_private;
 676         drm_mga_buf_priv_t *buf_priv = buf->dev_private;
 677         drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
 678         u32 address = (u32) buf->bus_address;
 679         int i = 0;
 680         DMA_LOCALS;
 681         DRM_DEBUG("indices: buf=%d start=%d end=%d\n", buf->idx, start, end);
 682
 683         if (start != end) {
 684                 buf_priv->dispatched = 1;
 685
 686                 MGA_EMIT_STATE(dev_priv, sarea_priv->dirty);
 687
 688                 do {
 689                         if (i < sarea_priv->nbox) {
 690                                 mga_emit_clip_rect(dev_priv,
 691                                                    &sarea_priv->boxes[i]);
 692                         }
 693
 694                         BEGIN_DMA(1);
 695
 696                         DMA_BLOCK(MGA_DMAPAD, 0x00000000,
 697                                   MGA_DMAPAD, 0x00000000,
 698                                   MGA_SETUPADDRESS, address + start,
 699                                   MGA_SETUPEND, ((address + end) |
 700                                                  dev_priv->dma_access));
 701
 702                         ADVANCE_DMA();
 703                 } while (++i < sarea_priv->nbox);
 704         }
 705
 706         if (buf_priv->discard) {
 707                 AGE_BUFFER(buf_priv);
 708                 buf->pending = 0;
 709                 buf->used = 0;
 710                 buf_priv->dispatched = 0;
 711
 712                 mga_freelist_put(dev, buf);
 713         }
 714
 715         FLUSH_DMA();
 716 }
 717
 718 /* This copies a 64 byte aligned agp region to the frambuffer with a
 719  * standard blit, the ioctl needs to do checking.
 720  */
 721 static void mga_dma_dispatch_iload(struct drm_device * dev, struct drm_buf * buf,
 722                                    unsigned int dstorg, unsigned int length)
 723 {
 724         drm_mga_private_t *dev_priv = dev->dev_private;
 725         drm_mga_buf_priv_t *buf_priv = buf->dev_private;
 726         drm_mga_context_regs_t *ctx = &dev_priv->sarea_priv->context_state;
 727         u32 srcorg =
 728             buf->bus_address | dev_priv->dma_access | MGA_SRCMAP_SYSMEM;
 729         u32 y2;
 730         DMA_LOCALS;
 731         DRM_DEBUG("buf=%d used=%d\n", buf->idx, buf->used);
 732
 733         y2 = length / 64;
 734
 735         BEGIN_DMA(5);
 736
 737         DMA_BLOCK(MGA_DMAPAD, 0x00000000,
 738                   MGA_DMAPAD, 0x00000000,
 739                   MGA_DWGSYNC, 0x00007100, MGA_DWGSYNC, 0x00007000);
 740
 741         DMA_BLOCK(MGA_DSTORG, dstorg,
 742                   MGA_MACCESS, 0x00000000, MGA_SRCORG, srcorg, MGA_AR5, 64);
 743
 744         DMA_BLOCK(MGA_PITCH, 64,
 745                   MGA_PLNWT, 0xffffffff,
 746                   MGA_DMAPAD, 0x00000000, MGA_DWGCTL, MGA_DWGCTL_COPY);
 747
 748         DMA_BLOCK(MGA_AR0, 63,
 749                   MGA_AR3, 0,
 750                   MGA_FXBNDRY, (63 << 16) | 0, MGA_YDSTLEN + MGA_EXEC, y2);
 751
 752         DMA_BLOCK(MGA_PLNWT, ctx->plnwt,
 753                   MGA_SRCORG, dev_priv->front_offset,
 754                   MGA_PITCH, dev_priv->front_pitch, MGA_DWGSYNC, 0x00007000);
 755
 756         ADVANCE_DMA();
 757
 758         AGE_BUFFER(buf_priv);
 759
 760         buf->pending = 0;
 761         buf->used = 0;
 762         buf_priv->dispatched = 0;
 763
 764         mga_freelist_put(dev, buf);
 765
 766         FLUSH_DMA();
 767 }
 768
 769 static void mga_dma_dispatch_blit(struct drm_device * dev, drm_mga_blit_t * blit)
 770 {
 771         drm_mga_private_t *dev_priv = dev->dev_private;
 772         drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
 773         drm_mga_context_regs_t *ctx = &sarea_priv->context_state;
 774         struct drm_clip_rect *pbox = sarea_priv->boxes;
 775         int nbox = sarea_priv->nbox;
 776         u32 scandir = 0, i;
 777         DMA_LOCALS;
 778         DRM_DEBUG("\n");
 779
 780         BEGIN_DMA(4 + nbox);
 781
 782         DMA_BLOCK(MGA_DMAPAD, 0x00000000,
 783                   MGA_DMAPAD, 0x00000000,
 784                   MGA_DWGSYNC, 0x00007100, MGA_DWGSYNC, 0x00007000);
 785
 786         DMA_BLOCK(MGA_DWGCTL, MGA_DWGCTL_COPY,
 787                   MGA_PLNWT, blit->planemask,
 788                   MGA_SRCORG, blit->srcorg, MGA_DSTORG, blit->dstorg);
 789
 790         DMA_BLOCK(MGA_SGN, scandir,
 791                   MGA_MACCESS, dev_priv->maccess,
 792                   MGA_AR5, blit->ydir * blit->src_pitch,
 793                   MGA_PITCH, blit->dst_pitch);
 794
 795         for (i = 0; i < nbox; i++) {
 796                 int srcx = pbox[i].x1 + blit->delta_sx;
 797                 int srcy = pbox[i].y1 + blit->delta_sy;
 798                 int dstx = pbox[i].x1 + blit->delta_dx;
 799                 int dsty = pbox[i].y1 + blit->delta_dy;
 800                 int h = pbox[i].y2 - pbox[i].y1;
 801                 int w = pbox[i].x2 - pbox[i].x1 - 1;
 802                 int start;
 803
 804                 if (blit->ydir == -1) {
 805                         srcy = blit->height - srcy - 1;
 806                 }
 807
 808                 start = srcy * blit->src_pitch + srcx;
 809
 810                 DMA_BLOCK(MGA_AR0, start + w,
 811                           MGA_AR3, start,
 812                           MGA_FXBNDRY, ((dstx + w) << 16) | (dstx & 0xffff),
 813                           MGA_YDSTLEN + MGA_EXEC, (dsty << 16) | h);
 814         }
 815
 816         /* Do something to flush AGP?
 817          */
 818
 819         /* Force reset of DWGCTL */
 820         DMA_BLOCK(MGA_DMAPAD, 0x00000000,
 821                   MGA_PLNWT, ctx->plnwt,
 822                   MGA_PITCH, dev_priv->front_pitch, MGA_DWGCTL, ctx->dwgctl);
 823
 824         ADVANCE_DMA();
 825 }
 826
 827 /* ================================================================
 828  *
 829  */
 830
 831 static int mga_dma_clear(DRM_IOCTL_ARGS)
 832 {
 833         DRM_DEVICE;
 834         drm_mga_private_t *dev_priv = dev->dev_private;
 835         drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
 836         drm_mga_clear_t clear;
 837
 838         LOCK_TEST_WITH_RETURN(dev, file_priv);
 839
 840         DRM_COPY_FROM_USER_IOCTL(clear, (drm_mga_clear_t __user *) data,
 841                                  sizeof(clear));
 842
 843         if (sarea_priv->nbox > MGA_NR_SAREA_CLIPRECTS)
 844                 sarea_priv->nbox = MGA_NR_SAREA_CLIPRECTS;
 845
 846         WRAP_TEST_WITH_RETURN(dev_priv);
 847
 848         mga_dma_dispatch_clear(dev, &clear);
 849
 850         /* Make sure we restore the 3D state next time.
 851          */
 852         dev_priv->sarea_priv->dirty |= MGA_UPLOAD_CONTEXT;
 853
 854         return 0;
 855 }
 856
 857 static int mga_dma_swap(DRM_IOCTL_ARGS)
 858 {
 859         DRM_DEVICE;
 860         drm_mga_private_t *dev_priv = dev->dev_private;
 861         drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
 862
 863         LOCK_TEST_WITH_RETURN(dev, file_priv);
 864
 865         if (sarea_priv->nbox > MGA_NR_SAREA_CLIPRECTS)
 866                 sarea_priv->nbox = MGA_NR_SAREA_CLIPRECTS;
 867
 868         WRAP_TEST_WITH_RETURN(dev_priv);
 869
 870         mga_dma_dispatch_swap(dev);
 871
 872         /* Make sure we restore the 3D state next time.
 873          */
 874         dev_priv->sarea_priv->dirty |= MGA_UPLOAD_CONTEXT;
 875
 876         return 0;
 877 }
 878
 879 static int mga_dma_vertex(DRM_IOCTL_ARGS)
 880 {
 881         DRM_DEVICE;
 882         drm_mga_private_t *dev_priv = dev->dev_private;
 883         struct drm_device_dma *dma = dev->dma;
 884         struct drm_buf *buf;
 885         drm_mga_buf_priv_t *buf_priv;
 886         drm_mga_vertex_t vertex;
 887
 888         LOCK_TEST_WITH_RETURN(dev, file_priv);
 889
 890         DRM_COPY_FROM_USER_IOCTL(vertex,
 891                                  (drm_mga_vertex_t __user *) data,
 892                                  sizeof(vertex));
 893
 894         if (vertex.idx < 0 || vertex.idx > dma->buf_count)
 895                 return -EINVAL;
 896         buf = dma->buflist[vertex.idx];
 897         buf_priv = buf->dev_private;
 898
 899         buf->used = vertex.used;
 900         buf_priv->discard = vertex.discard;
 901
 902         if (!mga_verify_state(dev_priv)) {
 903                 if (vertex.discard) {
 904                         if (buf_priv->dispatched == 1)
 905                                 AGE_BUFFER(buf_priv);
 906                         buf_priv->dispatched = 0;
 907                         mga_freelist_put(dev, buf);
 908                 }
 909                 return -EINVAL;
 910         }
 911
 912         WRAP_TEST_WITH_RETURN(dev_priv);
 913
 914         mga_dma_dispatch_vertex(dev, buf);
 915
 916         return 0;
 917 }
 918
 919 static int mga_dma_indices(DRM_IOCTL_ARGS)
 920 {
 921         DRM_DEVICE;
 922         drm_mga_private_t *dev_priv = dev->dev_private;
 923         struct drm_device_dma *dma = dev->dma;
 924         struct drm_buf *buf;
 925         drm_mga_buf_priv_t *buf_priv;
 926         drm_mga_indices_t indices;
 927
 928         LOCK_TEST_WITH_RETURN(dev, file_priv);
 929
 930         DRM_COPY_FROM_USER_IOCTL(indices,
 931                                  (drm_mga_indices_t __user *) data,
 932                                  sizeof(indices));
 933
 934         if (indices.idx < 0 || indices.idx > dma->buf_count)
 935                 return -EINVAL;
 936
 937         buf = dma->buflist[indices.idx];
 938         buf_priv = buf->dev_private;
 939
 940         buf_priv->discard = indices.discard;
 941
 942         if (!mga_verify_state(dev_priv)) {
 943                 if (indices.discard) {
 944                         if (buf_priv->dispatched == 1)
 945                                 AGE_BUFFER(buf_priv);
 946                         buf_priv->dispatched = 0;
 947                         mga_freelist_put(dev, buf);
 948                 }
 949                 return -EINVAL;
 950         }
 951
 952         WRAP_TEST_WITH_RETURN(dev_priv);
 953
 954         mga_dma_dispatch_indices(dev, buf, indices.start, indices.end);
 955
 956         return 0;
 957 }
 958
 959 static int mga_dma_iload(DRM_IOCTL_ARGS)
 960 {
 961         DRM_DEVICE;
 962         struct drm_device_dma *dma = dev->dma;
 963         drm_mga_private_t *dev_priv = dev->dev_private;
 964         struct drm_buf *buf;
 965         drm_mga_buf_priv_t *buf_priv;
 966         drm_mga_iload_t iload;
 967         DRM_DEBUG("\n");
 968
 969         LOCK_TEST_WITH_RETURN(dev, file_priv);
 970
 971         DRM_COPY_FROM_USER_IOCTL(iload, (drm_mga_iload_t __user *) data,
 972                                  sizeof(iload));
 973
 974 #if 0
 975         if (mga_do_wait_for_idle(dev_priv) < 0) {
 976                 if (MGA_DMA_DEBUG)
 977                         DRM_INFO("%s: -EBUSY\n", __FUNCTION__);
 978                 return -EBUSY;
 979         }
 980 #endif
 981         if (iload.idx < 0 || iload.idx > dma->buf_count)
 982                 return -EINVAL;
 983
 984         buf = dma->buflist[iload.idx];
 985         buf_priv = buf->dev_private;
 986
 987         if (mga_verify_iload(dev_priv, iload.dstorg, iload.length)) {
 988                 mga_freelist_put(dev, buf);
 989                 return -EINVAL;
 990         }
 991
 992         WRAP_TEST_WITH_RETURN(dev_priv);
 993
 994         mga_dma_dispatch_iload(dev, buf, iload.dstorg, iload.length);
 995
 996         /* Make sure we restore the 3D state next time.
 997          */
 998         dev_priv->sarea_priv->dirty |= MGA_UPLOAD_CONTEXT;
 999
1000         return 0;
1001 }
1002
1003 static int mga_dma_blit(DRM_IOCTL_ARGS)
1004 {
1005         DRM_DEVICE;
1006         drm_mga_private_t *dev_priv = dev->dev_private;
1007         drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
1008         drm_mga_blit_t blit;
1009         DRM_DEBUG("\n");
1010
1011         LOCK_TEST_WITH_RETURN(dev, file_priv);
1012
1013         DRM_COPY_FROM_USER_IOCTL(blit, (drm_mga_blit_t __user *) data,
1014                                  sizeof(blit));
1015
1016         if (sarea_priv->nbox > MGA_NR_SAREA_CLIPRECTS)
1017                 sarea_priv->nbox = MGA_NR_SAREA_CLIPRECTS;
1018
1019         if (mga_verify_blit(dev_priv, blit.srcorg, blit.dstorg))
1020                 return -EINVAL;
1021
1022         WRAP_TEST_WITH_RETURN(dev_priv);
1023
1024         mga_dma_dispatch_blit(dev, &blit);
1025
1026         /* Make sure we restore the 3D state next time.
1027          */
1028         dev_priv->sarea_priv->dirty |= MGA_UPLOAD_CONTEXT;
1029
1030         return 0;
1031 }
1032
1033 static int mga_getparam(DRM_IOCTL_ARGS)
1034 {
1035         DRM_DEVICE;
1036         drm_mga_private_t *dev_priv = dev->dev_private;
1037         drm_mga_getparam_t param;
1038         int value;
1039
1040         if (!dev_priv) {
1041                 DRM_ERROR("%s called with no initialization\n", __FUNCTION__);
1042                 return -EINVAL;
1043         }
1044
1045         DRM_COPY_FROM_USER_IOCTL(param, (drm_mga_getparam_t __user *) data,
1046                                  sizeof(param));
1047
1048         DRM_DEBUG("pid=%d\n", DRM_CURRENTPID);
1049
1050         switch (param.param) {
1051         case MGA_PARAM_IRQ_NR:
1052                 value = dev->irq;
1053                 break;
1054         case MGA_PARAM_CARD_TYPE:
1055                 value = dev_priv->chipset;
1056                 break;
1057         default:
1058                 return -EINVAL;
1059         }
1060
1061         if (DRM_COPY_TO_USER(param.value, &value, sizeof(int))) {
1062                 DRM_ERROR("copy_to_user\n");
1063                 return -EFAULT;
1064         }
1065
1066         return 0;
1067 }
1068
1069 static int mga_set_fence(DRM_IOCTL_ARGS)
1070 {
1071         DRM_DEVICE;
1072         drm_mga_private_t *dev_priv = dev->dev_private;
1073         u32 temp;
1074         DMA_LOCALS;
1075
1076         if (!dev_priv) {
1077                 DRM_ERROR("%s called with no initialization\n", __FUNCTION__);
1078                 return -EINVAL;
1079         }
1080
1081         DRM_DEBUG("pid=%d\n", DRM_CURRENTPID);
1082
1083         /* I would normal do this assignment in the declaration of temp,
1084          * but dev_priv may be NULL.
1085          */
1086
1087         temp = dev_priv->next_fence_to_post;
1088         dev_priv->next_fence_to_post++;
1089
1090         BEGIN_DMA(1);
1091         DMA_BLOCK(MGA_DMAPAD, 0x00000000,
1092                   MGA_DMAPAD, 0x00000000,
1093                   MGA_DMAPAD, 0x00000000, MGA_SOFTRAP, 0x00000000);
1094         ADVANCE_DMA();
1095
1096         if (DRM_COPY_TO_USER((u32 __user *) data, &temp, sizeof(u32))) {
1097                 DRM_ERROR("copy_to_user\n");
1098                 return -EFAULT;
1099         }
1100
1101         return 0;
1102 }
1103
1104 static int mga_wait_fence(DRM_IOCTL_ARGS)
1105 {
1106         DRM_DEVICE;
1107         drm_mga_private_t *dev_priv = dev->dev_private;
1108         u32 fence;
1109
1110         if (!dev_priv) {
1111                 DRM_ERROR("%s called with no initialization\n", __FUNCTION__);
1112                 return -EINVAL;
1113         }
1114
1115         DRM_COPY_FROM_USER_IOCTL(fence, (u32 __user *) data, sizeof(u32));
1116
1117         DRM_DEBUG("pid=%d\n", DRM_CURRENTPID);
1118
1119         mga_driver_fence_wait(dev, &fence);
1120
1121         if (DRM_COPY_TO_USER((u32 __user *) data, &fence, sizeof(u32))) {
1122                 DRM_ERROR("copy_to_user\n");
1123                 return -EFAULT;
1124         }
1125
1126         return 0;
1127 }
1128
1129 drm_ioctl_desc_t mga_ioctls[] = {
1130         [DRM_IOCTL_NR(DRM_MGA_INIT)] = {mga_dma_init, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
1131         [DRM_IOCTL_NR(DRM_MGA_FLUSH)] = {mga_dma_flush, DRM_AUTH},
1132         [DRM_IOCTL_NR(DRM_MGA_RESET)] = {mga_dma_reset, DRM_AUTH},
1133         [DRM_IOCTL_NR(DRM_MGA_SWAP)] = {mga_dma_swap, DRM_AUTH},
1134         [DRM_IOCTL_NR(DRM_MGA_CLEAR)] = {mga_dma_clear, DRM_AUTH},
1135         [DRM_IOCTL_NR(DRM_MGA_VERTEX)] = {mga_dma_vertex, DRM_AUTH},
1136         [DRM_IOCTL_NR(DRM_MGA_INDICES)] = {mga_dma_indices, DRM_AUTH},
1137         [DRM_IOCTL_NR(DRM_MGA_ILOAD)] = {mga_dma_iload, DRM_AUTH},
1138         [DRM_IOCTL_NR(DRM_MGA_BLIT)] = {mga_dma_blit, DRM_AUTH},
1139         [DRM_IOCTL_NR(DRM_MGA_GETPARAM)] = {mga_getparam, DRM_AUTH},
1140         [DRM_IOCTL_NR(DRM_MGA_SET_FENCE)] = {mga_set_fence, DRM_AUTH},
1141         [DRM_IOCTL_NR(DRM_MGA_WAIT_FENCE)] = {mga_wait_fence, DRM_AUTH},
1142         [DRM_IOCTL_NR(DRM_MGA_DMA_BOOTSTRAP)] = {mga_dma_bootstrap, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
1143 };
1144
1145 int mga_max_ioctl = DRM_ARRAY_SIZE(mga_ioctls);