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                                 drm_clip_rect_t *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,
  65                   MGA_YBOT, (box->y2 - 1) * pitch);
  66
  67         ADVANCE_DMA();
  68 }
  69
  70 static __inline__ void mga_g200_emit_context( drm_mga_private_t *dev_priv )
  71 {
  72         drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
  73         drm_mga_context_regs_t *ctx = &sarea_priv->context_state;
  74         DMA_LOCALS;
  75
  76         BEGIN_DMA( 3 );
  77
  78         DMA_BLOCK( MGA_DSTORG,          ctx->dstorg,
  79                    MGA_MACCESS,         ctx->maccess,
  80                    MGA_PLNWT,           ctx->plnwt,
  81                    MGA_DWGCTL,          ctx->dwgctl );
  82
  83         DMA_BLOCK( MGA_ALPHACTRL,       ctx->alphactrl,
  84                    MGA_FOGCOL,          ctx->fogcolor,
  85                    MGA_WFLAG,           ctx->wflag,
  86                    MGA_ZORG,            dev_priv->depth_offset );
  87
  88         DMA_BLOCK( MGA_FCOL,            ctx->fcol,
  89                    MGA_DMAPAD,          0x00000000,
  90                    MGA_DMAPAD,          0x00000000,
  91                    MGA_DMAPAD,          0x00000000 );
  92
  93         ADVANCE_DMA();
  94 }
  95
  96 static __inline__ void mga_g400_emit_context( drm_mga_private_t *dev_priv )
  97 {
  98         drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
  99         drm_mga_context_regs_t *ctx = &sarea_priv->context_state;
 100         DMA_LOCALS;
 101
 102         BEGIN_DMA( 4 );
 103
 104         DMA_BLOCK( MGA_DSTORG,          ctx->dstorg,
 105                    MGA_MACCESS,         ctx->maccess,
 106                    MGA_PLNWT,           ctx->plnwt,
 107                    MGA_DWGCTL,          ctx->dwgctl );
 108
 109         DMA_BLOCK( MGA_ALPHACTRL,       ctx->alphactrl,
 110                    MGA_FOGCOL,          ctx->fogcolor,
 111                    MGA_WFLAG,           ctx->wflag,
 112                    MGA_ZORG,            dev_priv->depth_offset );
 113
 114         DMA_BLOCK( MGA_WFLAG1,          ctx->wflag,
 115                    MGA_TDUALSTAGE0,     ctx->tdualstage0,
 116                    MGA_TDUALSTAGE1,     ctx->tdualstage1,
 117                    MGA_FCOL,            ctx->fcol );
 118
 119         DMA_BLOCK( MGA_STENCIL,         ctx->stencil,
 120                    MGA_STENCILCTL,      ctx->stencilctl,
 121                    MGA_DMAPAD,          0x00000000,
 122                    MGA_DMAPAD,          0x00000000 );
 123
 124         ADVANCE_DMA();
 125 }
 126
 127 static __inline__ void mga_g200_emit_tex0( drm_mga_private_t *dev_priv )
 128 {
 129         drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
 130         drm_mga_texture_regs_t *tex = &sarea_priv->tex_state[0];
 131         DMA_LOCALS;
 132
 133         BEGIN_DMA( 4 );
 134
 135         DMA_BLOCK( MGA_TEXCTL2,         tex->texctl2,
 136                    MGA_TEXCTL,          tex->texctl,
 137                    MGA_TEXFILTER,       tex->texfilter,
 138                    MGA_TEXBORDERCOL,    tex->texbordercol );
 139
 140         DMA_BLOCK( MGA_TEXORG,          tex->texorg,
 141                    MGA_TEXORG1,         tex->texorg1,
 142                    MGA_TEXORG2,         tex->texorg2,
 143                    MGA_TEXORG3,         tex->texorg3 );
 144
 145         DMA_BLOCK( MGA_TEXORG4,         tex->texorg4,
 146                    MGA_TEXWIDTH,        tex->texwidth,
 147                    MGA_TEXHEIGHT,       tex->texheight,
 148                    MGA_WR24,            tex->texwidth );
 149
 150         DMA_BLOCK( MGA_WR34,            tex->texheight,
 151                    MGA_TEXTRANS,        0x0000ffff,
 152                    MGA_TEXTRANSHIGH,    0x0000ffff,
 153                    MGA_DMAPAD,          0x00000000 );
 154
 155         ADVANCE_DMA();
 156 }
 157
 158 static __inline__ void mga_g400_emit_tex0( drm_mga_private_t *dev_priv )
 159 {
 160         drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
 161         drm_mga_texture_regs_t *tex = &sarea_priv->tex_state[0];
 162         DMA_LOCALS;
 163
 164 /*      printk("mga_g400_emit_tex0 %x %x %x\n", tex->texorg, */
 165 /*             tex->texctl, tex->texctl2); */
 166
 167         BEGIN_DMA( 6 );
 168
 169         DMA_BLOCK( MGA_TEXCTL2,         tex->texctl2 | MGA_G400_TC2_MAGIC,
 170                    MGA_TEXCTL,          tex->texctl,
 171                    MGA_TEXFILTER,       tex->texfilter,
 172                    MGA_TEXBORDERCOL,    tex->texbordercol );
 173
 174         DMA_BLOCK( MGA_TEXORG,          tex->texorg,
 175                    MGA_TEXORG1,         tex->texorg1,
 176                    MGA_TEXORG2,         tex->texorg2,
 177                    MGA_TEXORG3,         tex->texorg3 );
 178
 179         DMA_BLOCK( MGA_TEXORG4,         tex->texorg4,
 180                    MGA_TEXWIDTH,        tex->texwidth,
 181                    MGA_TEXHEIGHT,       tex->texheight,
 182                    MGA_WR49,            0x00000000 );
 183
 184         DMA_BLOCK( MGA_WR57,            0x00000000,
 185                    MGA_WR53,            0x00000000,
 186                    MGA_WR61,            0x00000000,
 187                    MGA_WR52,            MGA_G400_WR_MAGIC );
 188
 189         DMA_BLOCK( MGA_WR60,            MGA_G400_WR_MAGIC,
 190                    MGA_WR54,            tex->texwidth | MGA_G400_WR_MAGIC,
 191                    MGA_WR62,            tex->texheight | MGA_G400_WR_MAGIC,
 192                    MGA_DMAPAD,          0x00000000 );
 193
 194         DMA_BLOCK( MGA_DMAPAD,          0x00000000,
 195                    MGA_DMAPAD,          0x00000000,
 196                    MGA_TEXTRANS,        0x0000ffff,
 197                    MGA_TEXTRANSHIGH,    0x0000ffff );
 198
 199         ADVANCE_DMA();
 200 }
 201
 202 static __inline__ void mga_g400_emit_tex1( drm_mga_private_t *dev_priv )
 203 {
 204         drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
 205         drm_mga_texture_regs_t *tex = &sarea_priv->tex_state[1];
 206         DMA_LOCALS;
 207
 208 /*      printk("mga_g400_emit_tex1 %x %x %x\n", tex->texorg,  */
 209 /*             tex->texctl, tex->texctl2); */
 210
 211         BEGIN_DMA( 5 );
 212
 213         DMA_BLOCK( MGA_TEXCTL2,         (tex->texctl2 |
 214                                          MGA_MAP1_ENABLE |
 215                                          MGA_G400_TC2_MAGIC),
 216                    MGA_TEXCTL,          tex->texctl,
 217                    MGA_TEXFILTER,       tex->texfilter,
 218                    MGA_TEXBORDERCOL,    tex->texbordercol );
 219
 220         DMA_BLOCK( MGA_TEXORG,          tex->texorg,
 221                    MGA_TEXORG1,         tex->texorg1,
 222                    MGA_TEXORG2,         tex->texorg2,
 223                    MGA_TEXORG3,         tex->texorg3 );
 224
 225         DMA_BLOCK( MGA_TEXORG4,         tex->texorg4,
 226                    MGA_TEXWIDTH,        tex->texwidth,
 227                    MGA_TEXHEIGHT,       tex->texheight,
 228                    MGA_WR49,            0x00000000 );
 229
 230         DMA_BLOCK( MGA_WR57,            0x00000000,
 231                    MGA_WR53,            0x00000000,
 232                    MGA_WR61,            0x00000000,
 233                    MGA_WR52,            tex->texwidth | MGA_G400_WR_MAGIC );
 234
 235         DMA_BLOCK( MGA_WR60,            tex->texheight | MGA_G400_WR_MAGIC,
 236                    MGA_TEXTRANS,        0x0000ffff,
 237                    MGA_TEXTRANSHIGH,    0x0000ffff,
 238                    MGA_TEXCTL2,         tex->texctl2 | MGA_G400_TC2_MAGIC );
 239
 240         ADVANCE_DMA();
 241 }
 242
 243 static __inline__ void mga_g200_emit_pipe( drm_mga_private_t *dev_priv )
 244 {
 245         drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
 246         unsigned int pipe = sarea_priv->warp_pipe;
 247         DMA_LOCALS;
 248
 249         BEGIN_DMA( 3 );
 250
 251         DMA_BLOCK( MGA_WIADDR,  MGA_WMODE_SUSPEND,
 252                    MGA_WVRTXSZ, 0x00000007,
 253                    MGA_WFLAG,   0x00000000,
 254                    MGA_WR24,    0x00000000 );
 255
 256         DMA_BLOCK( MGA_WR25,    0x00000100,
 257                    MGA_WR34,    0x00000000,
 258                    MGA_WR42,    0x0000ffff,
 259                    MGA_WR60,    0x0000ffff );
 260
 261         /* Padding required to to hardware bug.
 262          */
 263         DMA_BLOCK(MGA_DMAPAD, 0xffffffff,
 264                   MGA_DMAPAD, 0xffffffff,
 265                   MGA_DMAPAD, 0xffffffff,
 266                   MGA_WIADDR, (dev_priv->warp_pipe_phys[pipe] |
 267                                MGA_WMODE_START | dev_priv->wagp_enable));
 268
 269         ADVANCE_DMA();
 270 }
 271
 272 static __inline__ void mga_g400_emit_pipe( drm_mga_private_t *dev_priv )
 273 {
 274         drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
 275         unsigned int pipe = sarea_priv->warp_pipe;
 276         DMA_LOCALS;
 277
 278 /*      printk("mga_g400_emit_pipe %x\n", pipe); */
 279
 280         BEGIN_DMA( 10 );
 281
 282         DMA_BLOCK( MGA_WIADDR2, MGA_WMODE_SUSPEND,
 283                    MGA_DMAPAD,  0x00000000,
 284                    MGA_DMAPAD,  0x00000000,
 285                    MGA_DMAPAD,  0x00000000 );
 286
 287         if ( pipe & MGA_T2 ) {
 288                 DMA_BLOCK( MGA_WVRTXSZ,         0x00001e09,
 289                            MGA_DMAPAD,          0x00000000,
 290                            MGA_DMAPAD,          0x00000000,
 291                            MGA_DMAPAD,          0x00000000 );
 292
 293                 DMA_BLOCK( MGA_WACCEPTSEQ,      0x00000000,
 294                            MGA_WACCEPTSEQ,      0x00000000,
 295                            MGA_WACCEPTSEQ,      0x00000000,
 296                            MGA_WACCEPTSEQ,      0x1e000000 );
 297         } else {
 298                 if ( dev_priv->warp_pipe & MGA_T2 ) {
 299                         /* Flush the WARP pipe */
 300                         DMA_BLOCK( MGA_YDST,            0x00000000,
 301                                    MGA_FXLEFT,          0x00000000,
 302                                    MGA_FXRIGHT,         0x00000001,
 303                                    MGA_DWGCTL,          MGA_DWGCTL_FLUSH );
 304
 305                         DMA_BLOCK( MGA_LEN + MGA_EXEC,  0x00000001,
 306                                    MGA_DWGSYNC,         0x00007000,
 307                                    MGA_TEXCTL2,         MGA_G400_TC2_MAGIC,
 308                                    MGA_LEN + MGA_EXEC,  0x00000000 );
 309
 310                         DMA_BLOCK( MGA_TEXCTL2,         (MGA_DUALTEX |
 311                                                          MGA_G400_TC2_MAGIC),
 312                                    MGA_LEN + MGA_EXEC,  0x00000000,
 313                                    MGA_TEXCTL2,         MGA_G400_TC2_MAGIC,
 314                                    MGA_DMAPAD,          0x00000000 );
 315                 }
 316
 317                 DMA_BLOCK( MGA_WVRTXSZ,         0x00001807,
 318                            MGA_DMAPAD,          0x00000000,
 319                            MGA_DMAPAD,          0x00000000,
 320                            MGA_DMAPAD,          0x00000000 );
 321
 322                 DMA_BLOCK( MGA_WACCEPTSEQ,      0x00000000,
 323                            MGA_WACCEPTSEQ,      0x00000000,
 324                            MGA_WACCEPTSEQ,      0x00000000,
 325                            MGA_WACCEPTSEQ,      0x18000000 );
 326         }
 327
 328         DMA_BLOCK( MGA_WFLAG,   0x00000000,
 329                    MGA_WFLAG1,  0x00000000,
 330                    MGA_WR56,    MGA_G400_WR56_MAGIC,
 331                    MGA_DMAPAD,  0x00000000 );
 332
 333         DMA_BLOCK( MGA_WR49,    0x00000000,             /* tex0              */
 334                    MGA_WR57,    0x00000000,             /* tex0              */
 335                    MGA_WR53,    0x00000000,             /* tex1              */
 336                    MGA_WR61,    0x00000000 );           /* tex1              */
 337
 338         DMA_BLOCK( MGA_WR54,    MGA_G400_WR_MAGIC,      /* tex0 width        */
 339                    MGA_WR62,    MGA_G400_WR_MAGIC,      /* tex0 height       */
 340                    MGA_WR52,    MGA_G400_WR_MAGIC,      /* tex1 width        */
 341                    MGA_WR60,    MGA_G400_WR_MAGIC );    /* tex1 height       */
 342
 343         /* Padding required to to hardware bug */
 344         DMA_BLOCK(MGA_DMAPAD, 0xffffffff,
 345                   MGA_DMAPAD, 0xffffffff,
 346                   MGA_DMAPAD, 0xffffffff,
 347                   MGA_WIADDR2, (dev_priv->warp_pipe_phys[pipe] |
 348                                 MGA_WMODE_START | dev_priv->wagp_enable));
 349
 350         ADVANCE_DMA();
 351 }
 352
 353 static void mga_g200_emit_state( drm_mga_private_t *dev_priv )
 354 {
 355         drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
 356         unsigned int dirty = sarea_priv->dirty;
 357
 358         if ( sarea_priv->warp_pipe != dev_priv->warp_pipe ) {
 359                 mga_g200_emit_pipe( dev_priv );
 360                 dev_priv->warp_pipe = sarea_priv->warp_pipe;
 361         }
 362
 363         if ( dirty & MGA_UPLOAD_CONTEXT ) {
 364                 mga_g200_emit_context( dev_priv );
 365                 sarea_priv->dirty &= ~MGA_UPLOAD_CONTEXT;
 366         }
 367
 368         if ( dirty & MGA_UPLOAD_TEX0 ) {
 369                 mga_g200_emit_tex0( dev_priv );
 370                 sarea_priv->dirty &= ~MGA_UPLOAD_TEX0;
 371         }
 372 }
 373
 374 static void mga_g400_emit_state( drm_mga_private_t *dev_priv )
 375 {
 376         drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
 377         unsigned int dirty = sarea_priv->dirty;
 378         int multitex = sarea_priv->warp_pipe & MGA_T2;
 379
 380         if ( sarea_priv->warp_pipe != dev_priv->warp_pipe ) {
 381                 mga_g400_emit_pipe( dev_priv );
 382                 dev_priv->warp_pipe = sarea_priv->warp_pipe;
 383         }
 384
 385         if ( dirty & MGA_UPLOAD_CONTEXT ) {
 386                 mga_g400_emit_context( dev_priv );
 387                 sarea_priv->dirty &= ~MGA_UPLOAD_CONTEXT;
 388         }
 389
 390         if ( dirty & MGA_UPLOAD_TEX0 ) {
 391                 mga_g400_emit_tex0( dev_priv );
 392                 sarea_priv->dirty &= ~MGA_UPLOAD_TEX0;
 393         }
 394
 395         if ( (dirty & MGA_UPLOAD_TEX1) && multitex ) {
 396                 mga_g400_emit_tex1( dev_priv );
 397                 sarea_priv->dirty &= ~MGA_UPLOAD_TEX1;
 398         }
 399 }
 400
 401
 402 /* ================================================================
 403  * SAREA state verification
 404  */
 405
 406 /* Disallow all write destinations except the front and backbuffer.
 407  */
 408 static int mga_verify_context( drm_mga_private_t *dev_priv )
 409 {
 410         drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
 411         drm_mga_context_regs_t *ctx = &sarea_priv->context_state;
 412
 413         if ( ctx->dstorg != dev_priv->front_offset &&
 414              ctx->dstorg != dev_priv->back_offset ) {
 415                 DRM_ERROR( "*** bad DSTORG: %x (front %x, back %x)\n\n",
 416                            ctx->dstorg, dev_priv->front_offset,
 417                            dev_priv->back_offset );
 418                 ctx->dstorg = 0;
 419                 return DRM_ERR(EINVAL);
 420         }
 421
 422         return 0;
 423 }
 424
 425 /* Disallow texture reads from PCI space.
 426  */
 427 static int mga_verify_tex( drm_mga_private_t *dev_priv, int unit )
 428 {
 429         drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
 430         drm_mga_texture_regs_t *tex = &sarea_priv->tex_state[unit];
 431         unsigned int org;
 432
 433         org = tex->texorg & (MGA_TEXORGMAP_MASK | MGA_TEXORGACC_MASK);
 434
 435         if ( org == (MGA_TEXORGMAP_SYSMEM | MGA_TEXORGACC_PCI) ) {
 436                 DRM_ERROR( "*** bad TEXORG: 0x%x, unit %d\n",
 437                            tex->texorg, unit );
 438                 tex->texorg = 0;
 439                 return DRM_ERR(EINVAL);
 440         }
 441
 442         return 0;
 443 }
 444
 445 static int mga_verify_state( drm_mga_private_t *dev_priv )
 446 {
 447         drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
 448         unsigned int dirty = sarea_priv->dirty;
 449         int ret = 0;
 450
 451         if ( sarea_priv->nbox > MGA_NR_SAREA_CLIPRECTS )
 452                 sarea_priv->nbox = MGA_NR_SAREA_CLIPRECTS;
 453
 454         if ( dirty & MGA_UPLOAD_CONTEXT )
 455                 ret |= mga_verify_context( dev_priv );
 456
 457         if ( dirty & MGA_UPLOAD_TEX0 )
 458                 ret |= mga_verify_tex( dev_priv, 0 );
 459
 460         if (dev_priv->chipset >= MGA_CARD_TYPE_G400) {
 461                 if (dirty & MGA_UPLOAD_TEX1)
 462                         ret |= mga_verify_tex(dev_priv, 1);
 463
 464                 if ( dirty & MGA_UPLOAD_PIPE )
 465                         ret |= ( sarea_priv->warp_pipe > MGA_MAX_G400_PIPES );
 466         } else {
 467                 if ( dirty & MGA_UPLOAD_PIPE )
 468                         ret |= ( sarea_priv->warp_pipe > MGA_MAX_G200_PIPES );
 469         }
 470
 471         return ( ret == 0 );
 472 }
 473
 474 static int mga_verify_iload( drm_mga_private_t *dev_priv,
 475                              unsigned int dstorg, unsigned int length )
 476 {
 477         if ( dstorg < dev_priv->texture_offset ||
 478              dstorg + length > (dev_priv->texture_offset +
 479                                 dev_priv->texture_size) ) {
 480                 DRM_ERROR( "*** bad iload DSTORG: 0x%x\n", dstorg );
 481                 return DRM_ERR(EINVAL);
 482         }
 483
 484         if ( length & MGA_ILOAD_MASK ) {
 485                 DRM_ERROR( "*** bad iload length: 0x%x\n",
 486                            length & MGA_ILOAD_MASK );
 487                 return DRM_ERR(EINVAL);
 488         }
 489
 490         return 0;
 491 }
 492
 493 static int mga_verify_blit( drm_mga_private_t *dev_priv,
 494                             unsigned int srcorg, unsigned int dstorg )
 495 {
 496         if ( (srcorg & 0x3) == (MGA_SRCACC_PCI | MGA_SRCMAP_SYSMEM) ||
 497              (dstorg & 0x3) == (MGA_SRCACC_PCI | MGA_SRCMAP_SYSMEM) ) {
 498                 DRM_ERROR( "*** bad blit: src=0x%x dst=0x%x\n",
 499                            srcorg, dstorg );
 500                 return DRM_ERR(EINVAL);
 501         }
 502         return 0;
 503 }
 504
 505
 506 /* ================================================================
 507  *
 508  */
 509
 510 static void mga_dma_dispatch_clear( drm_device_t *dev,
 511                                     drm_mga_clear_t *clear )
 512 {
 513         drm_mga_private_t *dev_priv = dev->dev_private;
 514         drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
 515         drm_mga_context_regs_t *ctx = &sarea_priv->context_state;
 516         drm_clip_rect_t *pbox = sarea_priv->boxes;
 517         int nbox = sarea_priv->nbox;
 518         int i;
 519         DMA_LOCALS;
 520         DRM_DEBUG( "\n" );
 521
 522         BEGIN_DMA( 1 );
 523
 524         DMA_BLOCK( MGA_DMAPAD,  0x00000000,
 525                    MGA_DMAPAD,  0x00000000,
 526                    MGA_DWGSYNC, 0x00007100,
 527                    MGA_DWGSYNC, 0x00007000 );
 528
 529         ADVANCE_DMA();
 530
 531         for ( i = 0 ; i < nbox ; i++ ) {
 532                 drm_clip_rect_t *box = &pbox[i];
 533                 u32 height = box->y2 - box->y1;
 534
 535                 DRM_DEBUG( "   from=%d,%d to=%d,%d\n",
 536                            box->x1, box->y1, box->x2, box->y2 );
 537
 538                 if ( clear->flags & MGA_FRONT ) {
 539                         BEGIN_DMA( 2 );
 540
 541                         DMA_BLOCK( MGA_DMAPAD,  0x00000000,
 542                                    MGA_PLNWT,   clear->color_mask,
 543                                    MGA_YDSTLEN, (box->y1 << 16) | height,
 544                                    MGA_FXBNDRY, (box->x2 << 16) | box->x1 );
 545
 546                         DMA_BLOCK( MGA_DMAPAD,  0x00000000,
 547                                    MGA_FCOL,    clear->clear_color,
 548                                    MGA_DSTORG,  dev_priv->front_offset,
 549                                    MGA_DWGCTL + MGA_EXEC,
 550                                                 dev_priv->clear_cmd );
 551
 552                         ADVANCE_DMA();
 553                 }
 554
 555
 556                 if ( clear->flags & MGA_BACK ) {
 557                         BEGIN_DMA( 2 );
 558
 559                         DMA_BLOCK( MGA_DMAPAD,  0x00000000,
 560                                    MGA_PLNWT,   clear->color_mask,
 561                                    MGA_YDSTLEN, (box->y1 << 16) | height,
 562                                    MGA_FXBNDRY, (box->x2 << 16) | box->x1 );
 563
 564                         DMA_BLOCK( MGA_DMAPAD,  0x00000000,
 565                                    MGA_FCOL,    clear->clear_color,
 566                                    MGA_DSTORG,  dev_priv->back_offset,
 567                                    MGA_DWGCTL + MGA_EXEC,
 568                                                 dev_priv->clear_cmd );
 569
 570                         ADVANCE_DMA();
 571                 }
 572
 573                 if ( clear->flags & MGA_DEPTH ) {
 574                         BEGIN_DMA( 2 );
 575
 576                         DMA_BLOCK( MGA_DMAPAD,  0x00000000,
 577                                    MGA_PLNWT,   clear->depth_mask,
 578                                    MGA_YDSTLEN, (box->y1 << 16) | height,
 579                                    MGA_FXBNDRY, (box->x2 << 16) | box->x1 );
 580
 581                         DMA_BLOCK( MGA_DMAPAD,  0x00000000,
 582                                    MGA_FCOL,    clear->clear_depth,
 583                                    MGA_DSTORG,  dev_priv->depth_offset,
 584                                    MGA_DWGCTL + MGA_EXEC,
 585                                                 dev_priv->clear_cmd );
 586
 587                         ADVANCE_DMA();
 588                 }
 589
 590         }
 591
 592         BEGIN_DMA( 1 );
 593
 594         /* Force reset of DWGCTL */
 595         DMA_BLOCK( MGA_DMAPAD,  0x00000000,
 596                    MGA_DMAPAD,  0x00000000,
 597                    MGA_PLNWT,   ctx->plnwt,
 598                    MGA_DWGCTL,  ctx->dwgctl );
 599
 600         ADVANCE_DMA();
 601
 602         FLUSH_DMA();
 603 }
 604
 605 static void mga_dma_dispatch_swap( drm_device_t *dev )
 606 {
 607         drm_mga_private_t *dev_priv = dev->dev_private;
 608         drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
 609         drm_mga_context_regs_t *ctx = &sarea_priv->context_state;
 610         drm_clip_rect_t *pbox = sarea_priv->boxes;
 611         int nbox = sarea_priv->nbox;
 612         int i;
 613         DMA_LOCALS;
 614         DRM_DEBUG( "\n" );
 615
 616         sarea_priv->last_frame.head = dev_priv->prim.tail;
 617         sarea_priv->last_frame.wrap = dev_priv->prim.last_wrap;
 618
 619         BEGIN_DMA( 4 + nbox );
 620
 621         DMA_BLOCK( MGA_DMAPAD,  0x00000000,
 622                    MGA_DMAPAD,  0x00000000,
 623                    MGA_DWGSYNC, 0x00007100,
 624                    MGA_DWGSYNC, 0x00007000 );
 625
 626         DMA_BLOCK( MGA_DSTORG,  dev_priv->front_offset,
 627                    MGA_MACCESS, dev_priv->maccess,
 628                    MGA_SRCORG,  dev_priv->back_offset,
 629                    MGA_AR5,     dev_priv->front_pitch );
 630
 631         DMA_BLOCK( MGA_DMAPAD,  0x00000000,
 632                    MGA_DMAPAD,  0x00000000,
 633                    MGA_PLNWT,   0xffffffff,
 634                    MGA_DWGCTL,  MGA_DWGCTL_COPY );
 635
 636         for ( i = 0 ; i < nbox ; i++ ) {
 637                 drm_clip_rect_t *box = &pbox[i];
 638                 u32 height = box->y2 - box->y1;
 639                 u32 start = box->y1 * dev_priv->front_pitch;
 640
 641                 DRM_DEBUG( "   from=%d,%d to=%d,%d\n",
 642                            box->x1, box->y1, box->x2, box->y2 );
 643
 644                 DMA_BLOCK( MGA_AR0,     start + box->x2 - 1,
 645                            MGA_AR3,     start + box->x1,
 646                            MGA_FXBNDRY, ((box->x2 - 1) << 16) | box->x1,
 647                            MGA_YDSTLEN + MGA_EXEC,
 648                                         (box->y1 << 16) | height );
 649         }
 650
 651         DMA_BLOCK( MGA_DMAPAD,  0x00000000,
 652                    MGA_PLNWT,   ctx->plnwt,
 653                    MGA_SRCORG,  dev_priv->front_offset,
 654                    MGA_DWGCTL,  ctx->dwgctl );
 655
 656         ADVANCE_DMA();
 657
 658         FLUSH_DMA();
 659
 660         DRM_DEBUG( "%s... done.\n", __FUNCTION__ );
 661 }
 662
 663 static void mga_dma_dispatch_vertex( drm_device_t *dev, drm_buf_t *buf )
 664 {
 665         drm_mga_private_t *dev_priv = dev->dev_private;
 666         drm_mga_buf_priv_t *buf_priv = buf->dev_private;
 667         drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
 668         u32 address = (u32) buf->bus_address;
 669         u32 length = (u32) buf->used;
 670         int i = 0;
 671         DMA_LOCALS;
 672         DRM_DEBUG( "vertex: buf=%d used=%d\n", buf->idx, buf->used );
 673
 674         if ( buf->used ) {
 675                 buf_priv->dispatched = 1;
 676
 677                 MGA_EMIT_STATE( dev_priv, sarea_priv->dirty );
 678
 679                 do {
 680                         if ( i < sarea_priv->nbox ) {
 681                                 mga_emit_clip_rect( dev_priv,
 682                                                     &sarea_priv->boxes[i] );
 683                         }
 684
 685                         BEGIN_DMA( 1 );
 686
 687                         DMA_BLOCK(MGA_DMAPAD, 0x00000000,
 688                                   MGA_DMAPAD, 0x00000000,
 689                                   MGA_SECADDRESS, (address |
 690                                                    MGA_DMA_VERTEX),
 691                                   MGA_SECEND, ((address + length) |
 692                                                dev_priv->dma_access));
 693
 694                         ADVANCE_DMA();
 695                 } while ( ++i < sarea_priv->nbox );
 696         }
 697
 698         if ( buf_priv->discard ) {
 699                 AGE_BUFFER( buf_priv );
 700                 buf->pending = 0;
 701                 buf->used = 0;
 702                 buf_priv->dispatched = 0;
 703
 704                 mga_freelist_put( dev, buf );
 705         }
 706
 707         FLUSH_DMA();
 708 }
 709
 710 static void mga_dma_dispatch_indices( drm_device_t *dev, drm_buf_t *buf,
 711                                       unsigned int start, unsigned int end )
 712 {
 713         drm_mga_private_t *dev_priv = dev->dev_private;
 714         drm_mga_buf_priv_t *buf_priv = buf->dev_private;
 715         drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
 716         u32 address = (u32) buf->bus_address;
 717         int i = 0;
 718         DMA_LOCALS;
 719         DRM_DEBUG( "indices: buf=%d start=%d end=%d\n", buf->idx, start, end );
 720
 721         if ( start != end ) {
 722                 buf_priv->dispatched = 1;
 723
 724                 MGA_EMIT_STATE( dev_priv, sarea_priv->dirty );
 725
 726                 do {
 727                         if ( i < sarea_priv->nbox ) {
 728                                 mga_emit_clip_rect( dev_priv,
 729                                                     &sarea_priv->boxes[i] );
 730                         }
 731
 732                         BEGIN_DMA( 1 );
 733
 734                         DMA_BLOCK(MGA_DMAPAD, 0x00000000,
 735                                   MGA_DMAPAD, 0x00000000,
 736                                   MGA_SETUPADDRESS, address + start,
 737                                   MGA_SETUPEND, ((address + end) |
 738                                                  dev_priv->dma_access));
 739
 740                         ADVANCE_DMA();
 741                 } while ( ++i < sarea_priv->nbox );
 742         }
 743
 744         if ( buf_priv->discard ) {
 745                 AGE_BUFFER( buf_priv );
 746                 buf->pending = 0;
 747                 buf->used = 0;
 748                 buf_priv->dispatched = 0;
 749
 750                 mga_freelist_put( dev, buf );
 751         }
 752
 753         FLUSH_DMA();
 754 }
 755
 756 /* This copies a 64 byte aligned agp region to the frambuffer with a
 757  * standard blit, the ioctl needs to do checking.
 758  */
 759 static void mga_dma_dispatch_iload( drm_device_t *dev, drm_buf_t *buf,
 760                                     unsigned int dstorg, unsigned int length )
 761 {
 762         drm_mga_private_t *dev_priv = dev->dev_private;
 763         drm_mga_buf_priv_t *buf_priv = buf->dev_private;
 764         drm_mga_context_regs_t *ctx = &dev_priv->sarea_priv->context_state;
 765         u32 srcorg = buf->bus_address | dev_priv->dma_access | MGA_SRCMAP_SYSMEM;
 766         u32 y2;
 767         DMA_LOCALS;
 768         DRM_DEBUG( "buf=%d used=%d\n", buf->idx, buf->used );
 769
 770         y2 = length / 64;
 771
 772         BEGIN_DMA( 5 );
 773
 774         DMA_BLOCK( MGA_DMAPAD,  0x00000000,
 775                    MGA_DMAPAD,  0x00000000,
 776                    MGA_DWGSYNC, 0x00007100,
 777                    MGA_DWGSYNC, 0x00007000 );
 778
 779         DMA_BLOCK( MGA_DSTORG,  dstorg,
 780                    MGA_MACCESS, 0x00000000,
 781                    MGA_SRCORG,  srcorg,
 782                    MGA_AR5,     64 );
 783
 784         DMA_BLOCK( MGA_PITCH,   64,
 785                    MGA_PLNWT,   0xffffffff,
 786                    MGA_DMAPAD,  0x00000000,
 787                    MGA_DWGCTL,  MGA_DWGCTL_COPY );
 788
 789         DMA_BLOCK( MGA_AR0,     63,
 790                    MGA_AR3,     0,
 791                    MGA_FXBNDRY, (63 << 16) | 0,
 792                    MGA_YDSTLEN + MGA_EXEC, y2 );
 793
 794         DMA_BLOCK( MGA_PLNWT,   ctx->plnwt,
 795                    MGA_SRCORG,  dev_priv->front_offset,
 796                    MGA_PITCH,   dev_priv->front_pitch,
 797                    MGA_DWGSYNC, 0x00007000 );
 798
 799         ADVANCE_DMA();
 800
 801         AGE_BUFFER( buf_priv );
 802
 803         buf->pending = 0;
 804         buf->used = 0;
 805         buf_priv->dispatched = 0;
 806
 807         mga_freelist_put( dev, buf );
 808
 809         FLUSH_DMA();
 810 }
 811
 812 static void mga_dma_dispatch_blit( drm_device_t *dev,
 813                                    drm_mga_blit_t *blit )
 814 {
 815         drm_mga_private_t *dev_priv = dev->dev_private;
 816         drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
 817         drm_mga_context_regs_t *ctx = &sarea_priv->context_state;
 818         drm_clip_rect_t *pbox = sarea_priv->boxes;
 819         int nbox = sarea_priv->nbox;
 820         u32 scandir = 0, i;
 821         DMA_LOCALS;
 822         DRM_DEBUG( "\n" );
 823
 824         BEGIN_DMA( 4 + nbox );
 825
 826         DMA_BLOCK( MGA_DMAPAD,  0x00000000,
 827                    MGA_DMAPAD,  0x00000000,
 828                    MGA_DWGSYNC, 0x00007100,
 829                    MGA_DWGSYNC, 0x00007000 );
 830
 831         DMA_BLOCK( MGA_DWGCTL,  MGA_DWGCTL_COPY,
 832                    MGA_PLNWT,   blit->planemask,
 833                    MGA_SRCORG,  blit->srcorg,
 834                    MGA_DSTORG,  blit->dstorg );
 835
 836         DMA_BLOCK( MGA_SGN,     scandir,
 837                    MGA_MACCESS, dev_priv->maccess,
 838                    MGA_AR5,     blit->ydir * blit->src_pitch,
 839                    MGA_PITCH,   blit->dst_pitch );
 840
 841         for ( i = 0 ; i < nbox ; i++ ) {
 842                 int srcx = pbox[i].x1 + blit->delta_sx;
 843                 int srcy = pbox[i].y1 + blit->delta_sy;
 844                 int dstx = pbox[i].x1 + blit->delta_dx;
 845                 int dsty = pbox[i].y1 + blit->delta_dy;
 846                 int h = pbox[i].y2 - pbox[i].y1;
 847                 int w = pbox[i].x2 - pbox[i].x1 - 1;
 848                 int start;
 849
 850                 if ( blit->ydir == -1 ) {
 851                         srcy = blit->height - srcy - 1;
 852                 }
 853
 854                 start = srcy * blit->src_pitch + srcx;
 855
 856                 DMA_BLOCK( MGA_AR0,     start + w,
 857                            MGA_AR3,     start,
 858                            MGA_FXBNDRY, ((dstx + w) << 16) | (dstx & 0xffff),
 859                            MGA_YDSTLEN + MGA_EXEC, (dsty << 16) | h );
 860         }
 861
 862         /* Do something to flush AGP?
 863          */
 864
 865         /* Force reset of DWGCTL */
 866         DMA_BLOCK( MGA_DMAPAD,  0x00000000,
 867                    MGA_PLNWT,   ctx->plnwt,
 868                    MGA_PITCH,   dev_priv->front_pitch,
 869                    MGA_DWGCTL,  ctx->dwgctl );
 870
 871         ADVANCE_DMA();
 872 }
 873
 874
 875 /* ================================================================
 876  *
 877  */
 878
 879 static int mga_dma_clear( DRM_IOCTL_ARGS )
 880 {
 881         DRM_DEVICE;
 882         drm_mga_private_t *dev_priv = dev->dev_private;
 883         drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
 884         drm_mga_clear_t clear;
 885
 886         LOCK_TEST_WITH_RETURN( dev, filp );
 887
 888         DRM_COPY_FROM_USER_IOCTL( clear, (drm_mga_clear_t __user *)data, sizeof(clear) );
 889
 890         if ( sarea_priv->nbox > MGA_NR_SAREA_CLIPRECTS )
 891                 sarea_priv->nbox = MGA_NR_SAREA_CLIPRECTS;
 892
 893         WRAP_TEST_WITH_RETURN( dev_priv );
 894
 895         mga_dma_dispatch_clear( dev, &clear );
 896
 897         /* Make sure we restore the 3D state next time.
 898          */
 899         dev_priv->sarea_priv->dirty |= MGA_UPLOAD_CONTEXT;
 900
 901         return 0;
 902 }
 903
 904 static int mga_dma_swap( DRM_IOCTL_ARGS )
 905 {
 906         DRM_DEVICE;
 907         drm_mga_private_t *dev_priv = dev->dev_private;
 908         drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
 909
 910         LOCK_TEST_WITH_RETURN( dev, filp );
 911
 912         if ( sarea_priv->nbox > MGA_NR_SAREA_CLIPRECTS )
 913                 sarea_priv->nbox = MGA_NR_SAREA_CLIPRECTS;
 914
 915         WRAP_TEST_WITH_RETURN( dev_priv );
 916
 917         mga_dma_dispatch_swap( dev );
 918
 919         /* Make sure we restore the 3D state next time.
 920          */
 921         dev_priv->sarea_priv->dirty |= MGA_UPLOAD_CONTEXT;
 922
 923         return 0;
 924 }
 925
 926 static int mga_dma_vertex( DRM_IOCTL_ARGS )
 927 {
 928         DRM_DEVICE;
 929         drm_mga_private_t *dev_priv = dev->dev_private;
 930         drm_device_dma_t *dma = dev->dma;
 931         drm_buf_t *buf;
 932         drm_mga_buf_priv_t *buf_priv;
 933         drm_mga_vertex_t vertex;
 934
 935         LOCK_TEST_WITH_RETURN( dev, filp );
 936
 937         DRM_COPY_FROM_USER_IOCTL( vertex,
 938                              (drm_mga_vertex_t __user *)data,
 939                              sizeof(vertex) );
 940
 941         if(vertex.idx < 0 || vertex.idx > dma->buf_count) return DRM_ERR(EINVAL);
 942         buf = dma->buflist[vertex.idx];
 943         buf_priv = buf->dev_private;
 944
 945         buf->used = vertex.used;
 946         buf_priv->discard = vertex.discard;
 947
 948         if ( !mga_verify_state( dev_priv ) ) {
 949                 if ( vertex.discard ) {
 950                         if ( buf_priv->dispatched == 1 )
 951                                 AGE_BUFFER( buf_priv );
 952                         buf_priv->dispatched = 0;
 953                         mga_freelist_put( dev, buf );
 954                 }
 955                 return DRM_ERR(EINVAL);
 956         }
 957
 958         WRAP_TEST_WITH_RETURN( dev_priv );
 959
 960         mga_dma_dispatch_vertex( dev, buf );
 961
 962         return 0;
 963 }
 964
 965 static int mga_dma_indices( DRM_IOCTL_ARGS )
 966 {
 967         DRM_DEVICE;
 968         drm_mga_private_t *dev_priv = dev->dev_private;
 969         drm_device_dma_t *dma = dev->dma;
 970         drm_buf_t *buf;
 971         drm_mga_buf_priv_t *buf_priv;
 972         drm_mga_indices_t indices;
 973
 974         LOCK_TEST_WITH_RETURN( dev, filp );
 975
 976         DRM_COPY_FROM_USER_IOCTL( indices,
 977                              (drm_mga_indices_t __user *)data,
 978                              sizeof(indices) );
 979
 980         if(indices.idx < 0 || indices.idx > dma->buf_count) return DRM_ERR(EINVAL);
 981
 982         buf = dma->buflist[indices.idx];
 983         buf_priv = buf->dev_private;
 984
 985         buf_priv->discard = indices.discard;
 986
 987         if ( !mga_verify_state( dev_priv ) ) {
 988                 if ( indices.discard ) {
 989                         if ( buf_priv->dispatched == 1 )
 990                                 AGE_BUFFER( buf_priv );
 991                         buf_priv->dispatched = 0;
 992                         mga_freelist_put( dev, buf );
 993                 }
 994                 return DRM_ERR(EINVAL);
 995         }
 996
 997         WRAP_TEST_WITH_RETURN( dev_priv );
 998
 999         mga_dma_dispatch_indices( dev, buf, indices.start, indices.end );
1000
1001         return 0;
1002 }
1003
1004 static int mga_dma_iload( DRM_IOCTL_ARGS )
1005 {
1006         DRM_DEVICE;
1007         drm_device_dma_t *dma = dev->dma;
1008         drm_mga_private_t *dev_priv = dev->dev_private;
1009         drm_buf_t *buf;
1010         drm_mga_buf_priv_t *buf_priv;
1011         drm_mga_iload_t iload;
1012         DRM_DEBUG( "\n" );
1013
1014         LOCK_TEST_WITH_RETURN( dev, filp );
1015
1016         DRM_COPY_FROM_USER_IOCTL( iload, (drm_mga_iload_t __user *)data, sizeof(iload) );
1017
1018 #if 0
1019         if ( mga_do_wait_for_idle( dev_priv ) < 0 ) {
1020                 if ( MGA_DMA_DEBUG )
1021                         DRM_INFO( "%s: -EBUSY\n", __FUNCTION__ );
1022                 return DRM_ERR(EBUSY);
1023         }
1024 #endif
1025         if(iload.idx < 0 || iload.idx > dma->buf_count) return DRM_ERR(EINVAL);
1026
1027         buf = dma->buflist[iload.idx];
1028         buf_priv = buf->dev_private;
1029
1030         if ( mga_verify_iload( dev_priv, iload.dstorg, iload.length ) ) {
1031                 mga_freelist_put( dev, buf );
1032                 return DRM_ERR(EINVAL);
1033         }
1034
1035         WRAP_TEST_WITH_RETURN( dev_priv );
1036
1037         mga_dma_dispatch_iload( dev, buf, iload.dstorg, iload.length );
1038
1039         /* Make sure we restore the 3D state next time.
1040          */
1041         dev_priv->sarea_priv->dirty |= MGA_UPLOAD_CONTEXT;
1042
1043         return 0;
1044 }
1045
1046 static int mga_dma_blit( DRM_IOCTL_ARGS )
1047 {
1048         DRM_DEVICE;
1049         drm_mga_private_t *dev_priv = dev->dev_private;
1050         drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
1051         drm_mga_blit_t blit;
1052         DRM_DEBUG( "\n" );
1053
1054         LOCK_TEST_WITH_RETURN( dev, filp );
1055
1056         DRM_COPY_FROM_USER_IOCTL( blit, (drm_mga_blit_t __user *)data, sizeof(blit) );
1057
1058         if ( sarea_priv->nbox > MGA_NR_SAREA_CLIPRECTS )
1059                 sarea_priv->nbox = MGA_NR_SAREA_CLIPRECTS;
1060
1061         if ( mga_verify_blit( dev_priv, blit.srcorg, blit.dstorg ) )
1062                 return DRM_ERR(EINVAL);
1063
1064         WRAP_TEST_WITH_RETURN( dev_priv );
1065
1066         mga_dma_dispatch_blit( dev, &blit );
1067
1068         /* Make sure we restore the 3D state next time.
1069          */
1070         dev_priv->sarea_priv->dirty |= MGA_UPLOAD_CONTEXT;
1071
1072         return 0;
1073 }
1074
1075 static int mga_getparam( DRM_IOCTL_ARGS )
1076 {
1077         DRM_DEVICE;
1078         drm_mga_private_t *dev_priv = dev->dev_private;
1079         drm_mga_getparam_t param;
1080         int value;
1081
1082         if ( !dev_priv ) {
1083                 DRM_ERROR( "%s called with no initialization\n", __FUNCTION__ );
1084                 return DRM_ERR(EINVAL);
1085         }
1086
1087         DRM_COPY_FROM_USER_IOCTL( param, (drm_mga_getparam_t __user *)data,
1088                              sizeof(param) );
1089
1090         DRM_DEBUG( "pid=%d\n", DRM_CURRENTPID );
1091
1092         switch( param.param ) {
1093         case MGA_PARAM_IRQ_NR:
1094                 value = dev->irq;
1095                 break;
1096         case MGA_PARAM_CARD_TYPE:
1097                 value = dev_priv->chipset;
1098                 break;
1099         default:
1100                 return DRM_ERR(EINVAL);
1101         }
1102
1103         if ( DRM_COPY_TO_USER( param.value, &value, sizeof(int) ) ) {
1104                 DRM_ERROR( "copy_to_user\n" );
1105                 return DRM_ERR(EFAULT);
1106         }
1107
1108         return 0;
1109 }
1110
1111 static int mga_set_fence(DRM_IOCTL_ARGS)
1112 {
1113         DRM_DEVICE;
1114         drm_mga_private_t *dev_priv = dev->dev_private;
1115         u32 temp;
1116         DMA_LOCALS;
1117
1118         if (!dev_priv) {
1119                 DRM_ERROR("%s called with no initialization\n", __FUNCTION__);
1120                 return DRM_ERR(EINVAL);
1121         }
1122
1123         DRM_DEBUG("pid=%d\n", DRM_CURRENTPID);
1124
1125         /* I would normal do this assignment in the declaration of temp,
1126          * but dev_priv may be NULL.
1127          */
1128
1129         temp = dev_priv->next_fence_to_post;
1130         dev_priv->next_fence_to_post++;
1131
1132         BEGIN_DMA(1);
1133         DMA_BLOCK(MGA_DMAPAD, 0x00000000,
1134                   MGA_DMAPAD, 0x00000000,
1135                   MGA_DMAPAD, 0x00000000,
1136                   MGA_SOFTRAP, 0x00000000);
1137         ADVANCE_DMA();
1138
1139         if (DRM_COPY_TO_USER( (u32 __user *) data, & temp, sizeof(u32))) {
1140                 DRM_ERROR("copy_to_user\n");
1141                 return DRM_ERR(EFAULT);
1142         }
1143
1144         return 0;
1145 }
1146
1147 static int mga_wait_fence(DRM_IOCTL_ARGS)
1148 {
1149         DRM_DEVICE;
1150         drm_mga_private_t *dev_priv = dev->dev_private;
1151         u32 fence;
1152
1153         if (!dev_priv) {
1154                 DRM_ERROR("%s called with no initialization\n", __FUNCTION__);
1155                 return DRM_ERR(EINVAL);
1156         }
1157
1158         DRM_COPY_FROM_USER_IOCTL(fence, (u32 __user *) data, sizeof(u32));
1159
1160         DRM_DEBUG("pid=%d\n", DRM_CURRENTPID);
1161
1162         mga_driver_fence_wait(dev, & fence);
1163
1164         if (DRM_COPY_TO_USER( (u32 __user *) data, & fence, sizeof(u32))) {
1165                 DRM_ERROR("copy_to_user\n");
1166                 return DRM_ERR(EFAULT);
1167         }
1168
1169         return 0;
1170 }
1171
1172 drm_ioctl_desc_t mga_ioctls[] = {
1173         [DRM_IOCTL_NR(DRM_MGA_INIT)] = {mga_dma_init, 1, 1},
1174         [DRM_IOCTL_NR(DRM_MGA_FLUSH)] = {mga_dma_flush, 1, 0},
1175         [DRM_IOCTL_NR(DRM_MGA_RESET)] = {mga_dma_reset, 1, 0},
1176         [DRM_IOCTL_NR(DRM_MGA_SWAP)] = {mga_dma_swap, 1, 0},
1177         [DRM_IOCTL_NR(DRM_MGA_CLEAR)] = {mga_dma_clear, 1, 0},
1178         [DRM_IOCTL_NR(DRM_MGA_VERTEX)] = {mga_dma_vertex, 1, 0},
1179         [DRM_IOCTL_NR(DRM_MGA_INDICES)] = {mga_dma_indices, 1, 0},
1180         [DRM_IOCTL_NR(DRM_MGA_ILOAD)] = {mga_dma_iload, 1, 0},
1181         [DRM_IOCTL_NR(DRM_MGA_BLIT)] = {mga_dma_blit, 1, 0},
1182         [DRM_IOCTL_NR(DRM_MGA_GETPARAM)] = {mga_getparam, 1, 0},
1183         [DRM_IOCTL_NR(DRM_MGA_SET_FENCE)] = {mga_set_fence, 1, 0},
1184         [DRM_IOCTL_NR(DRM_MGA_WAIT_FENCE)] = {mga_wait_fence, 1, 0},
1185         [DRM_IOCTL_NR(DRM_MGA_DMA_BOOTSTRAP)] = {mga_dma_bootstrap, 1, 1},
1186
1187 };
1188
1189 int mga_max_ioctl = DRM_ARRAY_SIZE(mga_ioctls);