drivers/gpu/drm/radeon/r300_cmdbuf.c

   1 /* r300_cmdbuf.c -- Command buffer emission for R300 -*- linux-c -*-
   2  *
   3  * Copyright (C) The Weather Channel, Inc.  2002.
   4  * Copyright (C) 2004 Nicolai Haehnle.
   5  * All Rights Reserved.
   6  *
   7  * The Weather Channel (TM) funded Tungsten Graphics to develop the
   8  * initial release of the Radeon 8500 driver under the XFree86 license.
   9  * This notice must be preserved.
  10  *
  11  * Permission is hereby granted, free of charge, to any person obtaining a
  12  * copy of this software and associated documentation files (the "Software"),
  13  * to deal in the Software without restriction, including without limitation
  14  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  15  * and/or sell copies of the Software, and to permit persons to whom the
  16  * Software is furnished to do so, subject to the following conditions:
  17  *
  18  * The above copyright notice and this permission notice (including the next
  19  * paragraph) shall be included in all copies or substantial portions of the
  20  * Software.
  21  *
  22  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  23  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  25  * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  26  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  27  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  28  * DEALINGS IN THE SOFTWARE.
  29  *
  30  * Authors:
  31  *    Nicolai Haehnle <prefect_@gmx.net>
  32  */
  33
  34 #include "drmP.h"
  35 #include "drm.h"
  36 #include "radeon_drm.h"
  37 #include "radeon_drv.h"
  38 #include "r300_reg.h"
  39
  40 #include <asm/unaligned.h>
  41
  42 #define R300_SIMULTANEOUS_CLIPRECTS             4
  43
  44 /* Values for R300_RE_CLIPRECT_CNTL depending on the number of cliprects
  45  */
  46 static const int r300_cliprect_cntl[4] = {
  47         0xAAAA,
  48         0xEEEE,
  49         0xFEFE,
  50         0xFFFE
  51 };
  52
  53 /**
  54  * Emit up to R300_SIMULTANEOUS_CLIPRECTS cliprects from the given command
  55  * buffer, starting with index n.
  56  */
  57 static int r300_emit_cliprects(drm_radeon_private_t *dev_priv,
  58                                drm_radeon_kcmd_buffer_t *cmdbuf, int n)
  59 {
  60         struct drm_clip_rect box;
  61         int nr;
  62         int i;
  63         RING_LOCALS;
  64
  65         nr = cmdbuf->nbox - n;
  66         if (nr > R300_SIMULTANEOUS_CLIPRECTS)
  67                 nr = R300_SIMULTANEOUS_CLIPRECTS;
  68
  69         DRM_DEBUG("%i cliprects\n", nr);
  70
  71         if (nr) {
  72                 BEGIN_RING(6 + nr * 2);
  73                 OUT_RING(CP_PACKET0(R300_RE_CLIPRECT_TL_0, nr * 2 - 1));
  74
  75                 for (i = 0; i < nr; ++i) {
  76                         if (DRM_COPY_FROM_USER_UNCHECKED
  77                             (&box, &cmdbuf->boxes[n + i], sizeof(box))) {
  78                                 DRM_ERROR("copy cliprect faulted\n");
  79                                 return -EFAULT;
  80                         }
  81
  82                         box.x2--; /* Hardware expects inclusive bottom-right corner */
  83                         box.y2--;
  84
  85                         if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_RV515) {
  86                                 box.x1 = (box.x1) &
  87                                         R300_CLIPRECT_MASK;
  88                                 box.y1 = (box.y1) &
  89                                         R300_CLIPRECT_MASK;
  90                                 box.x2 = (box.x2) &
  91                                         R300_CLIPRECT_MASK;
  92                                 box.y2 = (box.y2) &
  93                                         R300_CLIPRECT_MASK;
  94                         } else {
  95                                 box.x1 = (box.x1 + R300_CLIPRECT_OFFSET) &
  96                                         R300_CLIPRECT_MASK;
  97                                 box.y1 = (box.y1 + R300_CLIPRECT_OFFSET) &
  98                                         R300_CLIPRECT_MASK;
  99                                 box.x2 = (box.x2 + R300_CLIPRECT_OFFSET) &
 100                                         R300_CLIPRECT_MASK;
 101                                 box.y2 = (box.y2 + R300_CLIPRECT_OFFSET) &
 102                                         R300_CLIPRECT_MASK;
 103                         }
 104
 105                         OUT_RING((box.x1 << R300_CLIPRECT_X_SHIFT) |
 106                                  (box.y1 << R300_CLIPRECT_Y_SHIFT));
 107                         OUT_RING((box.x2 << R300_CLIPRECT_X_SHIFT) |
 108                                  (box.y2 << R300_CLIPRECT_Y_SHIFT));
 109
 110                 }
 111
 112                 OUT_RING_REG(R300_RE_CLIPRECT_CNTL, r300_cliprect_cntl[nr - 1]);
 113
 114                 /* TODO/SECURITY: Force scissors to a safe value, otherwise the
 115                  * client might be able to trample over memory.
 116                  * The impact should be very limited, but I'd rather be safe than
 117                  * sorry.
 118                  */
 119                 OUT_RING(CP_PACKET0(R300_RE_SCISSORS_TL, 1));
 120                 OUT_RING(0);
 121                 OUT_RING(R300_SCISSORS_X_MASK | R300_SCISSORS_Y_MASK);
 122                 ADVANCE_RING();
 123         } else {
 124                 /* Why we allow zero cliprect rendering:
 125                  * There are some commands in a command buffer that must be submitted
 126                  * even when there are no cliprects, e.g. DMA buffer discard
 127                  * or state setting (though state setting could be avoided by
 128                  * simulating a loss of context).
 129                  *
 130                  * Now since the cmdbuf interface is so chaotic right now (and is
 131                  * bound to remain that way for a bit until things settle down),
 132                  * it is basically impossible to filter out the commands that are
 133                  * necessary and those that aren't.
 134                  *
 135                  * So I choose the safe way and don't do any filtering at all;
 136                  * instead, I simply set up the engine so that all rendering
 137                  * can't produce any fragments.
 138                  */
 139                 BEGIN_RING(2);
 140                 OUT_RING_REG(R300_RE_CLIPRECT_CNTL, 0);
 141                 ADVANCE_RING();
 142         }
 143
 144         /* flus cache and wait idle clean after cliprect change */
 145         BEGIN_RING(2);
 146         OUT_RING(CP_PACKET0(R300_RB3D_DSTCACHE_CTLSTAT, 0));
 147         OUT_RING(R300_RB3D_DC_FLUSH);
 148         ADVANCE_RING();
 149         BEGIN_RING(2);
 150         OUT_RING(CP_PACKET0(RADEON_WAIT_UNTIL, 0));
 151         OUT_RING(RADEON_WAIT_3D_IDLECLEAN);
 152         ADVANCE_RING();
 153         /* set flush flag */
 154         dev_priv->track_flush |= RADEON_FLUSH_EMITED;
 155
 156         return 0;
 157 }
 158
 159 static u8 r300_reg_flags[0x10000 >> 2];
 160
 161 void r300_init_reg_flags(struct drm_device *dev)
 162 {
 163         int i;
 164         drm_radeon_private_t *dev_priv = dev->dev_private;
 165
 166         memset(r300_reg_flags, 0, 0x10000 >> 2);
 167 #define ADD_RANGE_MARK(reg, count,mark) \
 168                 for(i=((reg)>>2);i<((reg)>>2)+(count);i++)\
 169                         r300_reg_flags[i]|=(mark);
 170
 171 #define MARK_SAFE               1
 172 #define MARK_CHECK_OFFSET       2
 173
 174 #define ADD_RANGE(reg, count)   ADD_RANGE_MARK(reg, count, MARK_SAFE)
 175
 176         /* these match cmducs() command in r300_driver/r300/r300_cmdbuf.c */
 177         ADD_RANGE(R300_SE_VPORT_XSCALE, 6);
 178         ADD_RANGE(R300_VAP_CNTL, 1);
 179         ADD_RANGE(R300_SE_VTE_CNTL, 2);
 180         ADD_RANGE(0x2134, 2);
 181         ADD_RANGE(R300_VAP_CNTL_STATUS, 1);
 182         ADD_RANGE(R300_VAP_INPUT_CNTL_0, 2);
 183         ADD_RANGE(0x21DC, 1);
 184         ADD_RANGE(R300_VAP_UNKNOWN_221C, 1);
 185         ADD_RANGE(R300_VAP_CLIP_X_0, 4);
 186         ADD_RANGE(R300_VAP_PVS_STATE_FLUSH_REG, 1);
 187         ADD_RANGE(R300_VAP_UNKNOWN_2288, 1);
 188         ADD_RANGE(R300_VAP_OUTPUT_VTX_FMT_0, 2);
 189         ADD_RANGE(R300_VAP_PVS_CNTL_1, 3);
 190         ADD_RANGE(R300_GB_ENABLE, 1);
 191         ADD_RANGE(R300_GB_MSPOS0, 5);
 192         ADD_RANGE(R300_TX_INVALTAGS, 1);
 193         ADD_RANGE(R300_TX_ENABLE, 1);
 194         ADD_RANGE(0x4200, 4);
 195         ADD_RANGE(0x4214, 1);
 196         ADD_RANGE(R300_RE_POINTSIZE, 1);
 197         ADD_RANGE(0x4230, 3);
 198         ADD_RANGE(R300_RE_LINE_CNT, 1);
 199         ADD_RANGE(R300_RE_UNK4238, 1);
 200         ADD_RANGE(0x4260, 3);
 201         ADD_RANGE(R300_RE_SHADE, 4);
 202         ADD_RANGE(R300_RE_POLYGON_MODE, 5);
 203         ADD_RANGE(R300_RE_ZBIAS_CNTL, 1);
 204         ADD_RANGE(R300_RE_ZBIAS_T_FACTOR, 4);
 205         ADD_RANGE(R300_RE_OCCLUSION_CNTL, 1);
 206         ADD_RANGE(R300_RE_CULL_CNTL, 1);
 207         ADD_RANGE(0x42C0, 2);
 208         ADD_RANGE(R300_RS_CNTL_0, 2);
 209
 210         ADD_RANGE(R300_SU_REG_DEST, 1);
 211         if ((dev_priv->flags & RADEON_FAMILY_MASK) == CHIP_RV530)
 212                 ADD_RANGE(RV530_FG_ZBREG_DEST, 1);
 213
 214         ADD_RANGE(R300_SC_HYPERZ, 2);
 215         ADD_RANGE(0x43E8, 1);
 216
 217         ADD_RANGE(0x46A4, 5);
 218
 219         ADD_RANGE(R300_RE_FOG_STATE, 1);
 220         ADD_RANGE(R300_FOG_COLOR_R, 3);
 221         ADD_RANGE(R300_PP_ALPHA_TEST, 2);
 222         ADD_RANGE(0x4BD8, 1);
 223         ADD_RANGE(R300_PFS_PARAM_0_X, 64);
 224         ADD_RANGE(0x4E00, 1);
 225         ADD_RANGE(R300_RB3D_CBLEND, 2);
 226         ADD_RANGE(R300_RB3D_COLORMASK, 1);
 227         ADD_RANGE(R300_RB3D_BLEND_COLOR, 3);
 228         ADD_RANGE_MARK(R300_RB3D_COLOROFFSET0, 1, MARK_CHECK_OFFSET);   /* check offset */
 229         ADD_RANGE(R300_RB3D_COLORPITCH0, 1);
 230         ADD_RANGE(0x4E50, 9);
 231         ADD_RANGE(0x4E88, 1);
 232         ADD_RANGE(0x4EA0, 2);
 233         ADD_RANGE(R300_ZB_CNTL, 3);
 234         ADD_RANGE(R300_ZB_FORMAT, 4);
 235         ADD_RANGE_MARK(R300_ZB_DEPTHOFFSET, 1, MARK_CHECK_OFFSET);      /* check offset */
 236         ADD_RANGE(R300_ZB_DEPTHPITCH, 1);
 237         ADD_RANGE(R300_ZB_DEPTHCLEARVALUE, 1);
 238         ADD_RANGE(R300_ZB_ZMASK_OFFSET, 13);
 239         ADD_RANGE(R300_ZB_ZPASS_DATA, 2); /* ZB_ZPASS_DATA, ZB_ZPASS_ADDR */
 240
 241         ADD_RANGE(R300_TX_FILTER_0, 16);
 242         ADD_RANGE(R300_TX_FILTER1_0, 16);
 243         ADD_RANGE(R300_TX_SIZE_0, 16);
 244         ADD_RANGE(R300_TX_FORMAT_0, 16);
 245         ADD_RANGE(R300_TX_PITCH_0, 16);
 246         /* Texture offset is dangerous and needs more checking */
 247         ADD_RANGE_MARK(R300_TX_OFFSET_0, 16, MARK_CHECK_OFFSET);
 248         ADD_RANGE(R300_TX_CHROMA_KEY_0, 16);
 249         ADD_RANGE(R300_TX_BORDER_COLOR_0, 16);
 250
 251         /* Sporadic registers used as primitives are emitted */
 252         ADD_RANGE(R300_ZB_ZCACHE_CTLSTAT, 1);
 253         ADD_RANGE(R300_RB3D_DSTCACHE_CTLSTAT, 1);
 254         ADD_RANGE(R300_VAP_INPUT_ROUTE_0_0, 8);
 255         ADD_RANGE(R300_VAP_INPUT_ROUTE_1_0, 8);
 256
 257         if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_RV515) {
 258                 ADD_RANGE(R500_VAP_INDEX_OFFSET, 1);
 259                 ADD_RANGE(R500_US_CONFIG, 2);
 260                 ADD_RANGE(R500_US_CODE_ADDR, 3);
 261                 ADD_RANGE(R500_US_FC_CTRL, 1);
 262                 ADD_RANGE(R500_RS_IP_0, 16);
 263                 ADD_RANGE(R500_RS_INST_0, 16);
 264                 ADD_RANGE(R500_RB3D_COLOR_CLEAR_VALUE_AR, 2);
 265                 ADD_RANGE(R500_RB3D_CONSTANT_COLOR_AR, 2);
 266                 ADD_RANGE(R500_ZB_FIFO_SIZE, 2);
 267         } else {
 268                 ADD_RANGE(R300_PFS_CNTL_0, 3);
 269                 ADD_RANGE(R300_PFS_NODE_0, 4);
 270                 ADD_RANGE(R300_PFS_TEXI_0, 64);
 271                 ADD_RANGE(R300_PFS_INSTR0_0, 64);
 272                 ADD_RANGE(R300_PFS_INSTR1_0, 64);
 273                 ADD_RANGE(R300_PFS_INSTR2_0, 64);
 274                 ADD_RANGE(R300_PFS_INSTR3_0, 64);
 275                 ADD_RANGE(R300_RS_INTERP_0, 8);
 276                 ADD_RANGE(R300_RS_ROUTE_0, 8);
 277
 278         }
 279 }
 280
 281 static __inline__ int r300_check_range(unsigned reg, int count)
 282 {
 283         int i;
 284         if (reg & ~0xffff)
 285                 return -1;
 286         for (i = (reg >> 2); i < (reg >> 2) + count; i++)
 287                 if (r300_reg_flags[i] != MARK_SAFE)
 288                         return 1;
 289         return 0;
 290 }
 291
 292 static __inline__ int r300_emit_carefully_checked_packet0(drm_radeon_private_t *
 293                                                           dev_priv,
 294                                                           drm_radeon_kcmd_buffer_t
 295                                                           * cmdbuf,
 296                                                           drm_r300_cmd_header_t
 297                                                           header)
 298 {
 299         int reg;
 300         int sz;
 301         int i;
 302         int values[64];
 303         RING_LOCALS;
 304
 305         sz = header.packet0.count;
 306         reg = (header.packet0.reghi << 8) | header.packet0.reglo;
 307
 308         if ((sz > 64) || (sz < 0)) {
 309                 DRM_ERROR
 310                     ("Cannot emit more than 64 values at a time (reg=%04x sz=%d)\n",
 311                      reg, sz);
 312                 return -EINVAL;
 313         }
 314         for (i = 0; i < sz; i++) {
 315                 values[i] = ((int *)cmdbuf->buf)[i];
 316                 switch (r300_reg_flags[(reg >> 2) + i]) {
 317                 case MARK_SAFE:
 318                         break;
 319                 case MARK_CHECK_OFFSET:
 320                         if (!radeon_check_offset(dev_priv, (u32) values[i])) {
 321                                 DRM_ERROR
 322                                     ("Offset failed range check (reg=%04x sz=%d)\n",
 323                                      reg, sz);
 324                                 return -EINVAL;
 325                         }
 326                         break;
 327                 default:
 328                         DRM_ERROR("Register %04x failed check as flag=%02x\n",
 329                                   reg + i * 4, r300_reg_flags[(reg >> 2) + i]);
 330                         return -EINVAL;
 331                 }
 332         }
 333
 334         BEGIN_RING(1 + sz);
 335         OUT_RING(CP_PACKET0(reg, sz - 1));
 336         OUT_RING_TABLE(values, sz);
 337         ADVANCE_RING();
 338
 339         cmdbuf->buf += sz * 4;
 340         cmdbuf->bufsz -= sz * 4;
 341
 342         return 0;
 343 }
 344
 345 /**
 346  * Emits a packet0 setting arbitrary registers.
 347  * Called by r300_do_cp_cmdbuf.
 348  *
 349  * Note that checks are performed on contents and addresses of the registers
 350  */
 351 static __inline__ int r300_emit_packet0(drm_radeon_private_t *dev_priv,
 352                                         drm_radeon_kcmd_buffer_t *cmdbuf,
 353                                         drm_r300_cmd_header_t header)
 354 {
 355         int reg;
 356         int sz;
 357         RING_LOCALS;
 358
 359         sz = header.packet0.count;
 360         reg = (header.packet0.reghi << 8) | header.packet0.reglo;
 361
 362         if (!sz)
 363                 return 0;
 364
 365         if (sz * 4 > cmdbuf->bufsz)
 366                 return -EINVAL;
 367
 368         if (reg + sz * 4 >= 0x10000) {
 369                 DRM_ERROR("No such registers in hardware reg=%04x sz=%d\n", reg,
 370                           sz);
 371                 return -EINVAL;
 372         }
 373
 374         if (r300_check_range(reg, sz)) {
 375                 /* go and check everything */
 376                 return r300_emit_carefully_checked_packet0(dev_priv, cmdbuf,
 377                                                            header);
 378         }
 379         /* the rest of the data is safe to emit, whatever the values the user passed */
 380
 381         BEGIN_RING(1 + sz);
 382         OUT_RING(CP_PACKET0(reg, sz - 1));
 383         OUT_RING_TABLE((int *)cmdbuf->buf, sz);
 384         ADVANCE_RING();
 385
 386         cmdbuf->buf += sz * 4;
 387         cmdbuf->bufsz -= sz * 4;
 388
 389         return 0;
 390 }
 391
 392 /**
 393  * Uploads user-supplied vertex program instructions or parameters onto
 394  * the graphics card.
 395  * Called by r300_do_cp_cmdbuf.
 396  */
 397 static __inline__ int r300_emit_vpu(drm_radeon_private_t *dev_priv,
 398                                     drm_radeon_kcmd_buffer_t *cmdbuf,
 399                                     drm_r300_cmd_header_t header)
 400 {
 401         int sz;
 402         int addr;
 403         RING_LOCALS;
 404
 405         sz = header.vpu.count;
 406         addr = (header.vpu.adrhi << 8) | header.vpu.adrlo;
 407
 408         if (!sz)
 409                 return 0;
 410         if (sz * 16 > cmdbuf->bufsz)
 411                 return -EINVAL;
 412
 413         /* VAP is very sensitive so we purge cache before we program it
 414          * and we also flush its state before & after */
 415         BEGIN_RING(6);
 416         OUT_RING(CP_PACKET0(R300_RB3D_DSTCACHE_CTLSTAT, 0));
 417         OUT_RING(R300_RB3D_DC_FLUSH);
 418         OUT_RING(CP_PACKET0(RADEON_WAIT_UNTIL, 0));
 419         OUT_RING(RADEON_WAIT_3D_IDLECLEAN);
 420         OUT_RING(CP_PACKET0(R300_VAP_PVS_STATE_FLUSH_REG, 0));
 421         OUT_RING(0);
 422         ADVANCE_RING();
 423         /* set flush flag */
 424         dev_priv->track_flush |= RADEON_FLUSH_EMITED;
 425
 426         BEGIN_RING(3 + sz * 4);
 427         OUT_RING_REG(R300_VAP_PVS_UPLOAD_ADDRESS, addr);
 428         OUT_RING(CP_PACKET0_TABLE(R300_VAP_PVS_UPLOAD_DATA, sz * 4 - 1));
 429         OUT_RING_TABLE((int *)cmdbuf->buf, sz * 4);
 430         ADVANCE_RING();
 431
 432         BEGIN_RING(2);
 433         OUT_RING(CP_PACKET0(R300_VAP_PVS_STATE_FLUSH_REG, 0));
 434         OUT_RING(0);
 435         ADVANCE_RING();
 436
 437         cmdbuf->buf += sz * 16;
 438         cmdbuf->bufsz -= sz * 16;
 439
 440         return 0;
 441 }
 442
 443 /**
 444  * Emit a clear packet from userspace.
 445  * Called by r300_emit_packet3.
 446  */
 447 static __inline__ int r300_emit_clear(drm_radeon_private_t *dev_priv,
 448                                       drm_radeon_kcmd_buffer_t *cmdbuf)
 449 {
 450         RING_LOCALS;
 451
 452         if (8 * 4 > cmdbuf->bufsz)
 453                 return -EINVAL;
 454
 455         BEGIN_RING(10);
 456         OUT_RING(CP_PACKET3(R200_3D_DRAW_IMMD_2, 8));
 457         OUT_RING(R300_PRIM_TYPE_POINT | R300_PRIM_WALK_RING |
 458                  (1 << R300_PRIM_NUM_VERTICES_SHIFT));
 459         OUT_RING_TABLE((int *)cmdbuf->buf, 8);
 460         ADVANCE_RING();
 461
 462         BEGIN_RING(4);
 463         OUT_RING(CP_PACKET0(R300_RB3D_DSTCACHE_CTLSTAT, 0));
 464         OUT_RING(R300_RB3D_DC_FLUSH);
 465         OUT_RING(CP_PACKET0(RADEON_WAIT_UNTIL, 0));
 466         OUT_RING(RADEON_WAIT_3D_IDLECLEAN);
 467         ADVANCE_RING();
 468         /* set flush flag */
 469         dev_priv->track_flush |= RADEON_FLUSH_EMITED;
 470
 471         cmdbuf->buf += 8 * 4;
 472         cmdbuf->bufsz -= 8 * 4;
 473
 474         return 0;
 475 }
 476
 477 static __inline__ int r300_emit_3d_load_vbpntr(drm_radeon_private_t *dev_priv,
 478                                                drm_radeon_kcmd_buffer_t *cmdbuf,
 479                                                u32 header)
 480 {
 481         int count, i, k;
 482 #define MAX_ARRAY_PACKET  64
 483         u32 payload[MAX_ARRAY_PACKET];
 484         u32 narrays;
 485         RING_LOCALS;
 486
 487         count = (header >> 16) & 0x3fff;
 488
 489         if ((count + 1) > MAX_ARRAY_PACKET) {
 490                 DRM_ERROR("Too large payload in 3D_LOAD_VBPNTR (count=%d)\n",
 491                           count);
 492                 return -EINVAL;
 493         }
 494         memset(payload, 0, MAX_ARRAY_PACKET * 4);
 495         memcpy(payload, cmdbuf->buf + 4, (count + 1) * 4);
 496
 497         /* carefully check packet contents */
 498
 499         narrays = payload[0];
 500         k = 0;
 501         i = 1;
 502         while ((k < narrays) && (i < (count + 1))) {
 503                 i++;            /* skip attribute field */
 504                 if (!radeon_check_offset(dev_priv, payload[i])) {
 505                         DRM_ERROR
 506                             ("Offset failed range check (k=%d i=%d) while processing 3D_LOAD_VBPNTR packet.\n",
 507                              k, i);
 508                         return -EINVAL;
 509                 }
 510                 k++;
 511                 i++;
 512                 if (k == narrays)
 513                         break;
 514                 /* have one more to process, they come in pairs */
 515                 if (!radeon_check_offset(dev_priv, payload[i])) {
 516                         DRM_ERROR
 517                             ("Offset failed range check (k=%d i=%d) while processing 3D_LOAD_VBPNTR packet.\n",
 518                              k, i);
 519                         return -EINVAL;
 520                 }
 521                 k++;
 522                 i++;
 523         }
 524         /* do the counts match what we expect ? */
 525         if ((k != narrays) || (i != (count + 1))) {
 526                 DRM_ERROR
 527                     ("Malformed 3D_LOAD_VBPNTR packet (k=%d i=%d narrays=%d count+1=%d).\n",
 528                      k, i, narrays, count + 1);
 529                 return -EINVAL;
 530         }
 531
 532         /* all clear, output packet */
 533
 534         BEGIN_RING(count + 2);
 535         OUT_RING(header);
 536         OUT_RING_TABLE(payload, count + 1);
 537         ADVANCE_RING();
 538
 539         cmdbuf->buf += (count + 2) * 4;
 540         cmdbuf->bufsz -= (count + 2) * 4;
 541
 542         return 0;
 543 }
 544
 545 static __inline__ int r300_emit_bitblt_multi(drm_radeon_private_t *dev_priv,
 546                                              drm_radeon_kcmd_buffer_t *cmdbuf)
 547 {
 548         u32 *cmd = (u32 *) cmdbuf->buf;
 549         int count, ret;
 550         RING_LOCALS;
 551
 552         count=(cmd[0]>>16) & 0x3fff;
 553
 554         if (cmd[0] & 0x8000) {
 555                 u32 offset;
 556
 557                 if (cmd[1] & (RADEON_GMC_SRC_PITCH_OFFSET_CNTL
 558                               | RADEON_GMC_DST_PITCH_OFFSET_CNTL)) {
 559                         offset = cmd[2] << 10;
 560                         ret = !radeon_check_offset(dev_priv, offset);
 561                         if (ret) {
 562                                 DRM_ERROR("Invalid bitblt first offset is %08X\n", offset);
 563                                 return -EINVAL;
 564                         }
 565                 }
 566
 567                 if ((cmd[1] & RADEON_GMC_SRC_PITCH_OFFSET_CNTL) &&
 568                     (cmd[1] & RADEON_GMC_DST_PITCH_OFFSET_CNTL)) {
 569                         offset = cmd[3] << 10;
 570                         ret = !radeon_check_offset(dev_priv, offset);
 571                         if (ret) {
 572                                 DRM_ERROR("Invalid bitblt second offset is %08X\n", offset);
 573                                 return -EINVAL;
 574                         }
 575
 576                 }
 577         }
 578
 579         BEGIN_RING(count+2);
 580         OUT_RING(cmd[0]);
 581         OUT_RING_TABLE((int *)(cmdbuf->buf + 4), count + 1);
 582         ADVANCE_RING();
 583
 584         cmdbuf->buf += (count+2)*4;
 585         cmdbuf->bufsz -= (count+2)*4;
 586
 587         return 0;
 588 }
 589
 590 static __inline__ int r300_emit_draw_indx_2(drm_radeon_private_t *dev_priv,
 591                                             drm_radeon_kcmd_buffer_t *cmdbuf)
 592 {
 593         u32 *cmd;
 594         int count;
 595         int expected_count;
 596         RING_LOCALS;
 597
 598         cmd = (u32 *) cmdbuf->buf;
 599         count = (cmd[0]>>16) & 0x3fff;
 600         expected_count = cmd[1] >> 16;
 601         if (!(cmd[1] & R300_VAP_VF_CNTL__INDEX_SIZE_32bit))
 602                 expected_count = (expected_count+1)/2;
 603
 604         if (count && count != expected_count) {
 605                 DRM_ERROR("3D_DRAW_INDX_2: packet size %i, expected %i\n",
 606                         count, expected_count);
 607                 return -EINVAL;
 608         }
 609
 610         BEGIN_RING(count+2);
 611         OUT_RING(cmd[0]);
 612         OUT_RING_TABLE((int *)(cmdbuf->buf + 4), count + 1);
 613         ADVANCE_RING();
 614
 615         cmdbuf->buf += (count+2)*4;
 616         cmdbuf->bufsz -= (count+2)*4;
 617
 618         if (!count) {
 619                 drm_r300_cmd_header_t header;
 620
 621                 if (cmdbuf->bufsz < 4*4 + sizeof(header)) {
 622                         DRM_ERROR("3D_DRAW_INDX_2: expect subsequent INDX_BUFFER, but stream is too short.\n");
 623                         return -EINVAL;
 624                 }
 625
 626                 header.u = *(unsigned int *)cmdbuf->buf;
 627
 628                 cmdbuf->buf += sizeof(header);
 629                 cmdbuf->bufsz -= sizeof(header);
 630                 cmd = (u32 *) cmdbuf->buf;
 631
 632                 if (header.header.cmd_type != R300_CMD_PACKET3 ||
 633                     header.packet3.packet != R300_CMD_PACKET3_RAW ||
 634                     cmd[0] != CP_PACKET3(RADEON_CP_INDX_BUFFER, 2)) {
 635                         DRM_ERROR("3D_DRAW_INDX_2: expect subsequent INDX_BUFFER.\n");
 636                         return -EINVAL;
 637                 }
 638
 639                 if ((cmd[1] & 0x8000ffff) != 0x80000810) {
 640                         DRM_ERROR("Invalid indx_buffer reg address %08X\n", cmd[1]);
 641                         return -EINVAL;
 642                 }
 643                 if (!radeon_check_offset(dev_priv, cmd[2])) {
 644                         DRM_ERROR("Invalid indx_buffer offset is %08X\n", cmd[2]);
 645                         return -EINVAL;
 646                 }
 647                 if (cmd[3] != expected_count) {
 648                         DRM_ERROR("INDX_BUFFER: buffer size %i, expected %i\n",
 649                                 cmd[3], expected_count);
 650                         return -EINVAL;
 651                 }
 652
 653                 BEGIN_RING(4);
 654                 OUT_RING(cmd[0]);
 655                 OUT_RING_TABLE((int *)(cmdbuf->buf + 4), 3);
 656                 ADVANCE_RING();
 657
 658                 cmdbuf->buf += 4*4;
 659                 cmdbuf->bufsz -= 4*4;
 660         }
 661
 662         return 0;
 663 }
 664
 665 static __inline__ int r300_emit_raw_packet3(drm_radeon_private_t *dev_priv,
 666                                             drm_radeon_kcmd_buffer_t *cmdbuf)
 667 {
 668         u32 header;
 669         int count;
 670         RING_LOCALS;
 671
 672         if (4 > cmdbuf->bufsz)
 673                 return -EINVAL;
 674
 675         /* Fixme !! This simply emits a packet without much checking.
 676            We need to be smarter. */
 677
 678         /* obtain first word - actual packet3 header */
 679         header = *(u32 *) cmdbuf->buf;
 680
 681         /* Is it packet 3 ? */
 682         if ((header >> 30) != 0x3) {
 683                 DRM_ERROR("Not a packet3 header (0x%08x)\n", header);
 684                 return -EINVAL;
 685         }
 686
 687         count = (header >> 16) & 0x3fff;
 688
 689         /* Check again now that we know how much data to expect */
 690         if ((count + 2) * 4 > cmdbuf->bufsz) {
 691                 DRM_ERROR
 692                     ("Expected packet3 of length %d but have only %d bytes left\n",
 693                      (count + 2) * 4, cmdbuf->bufsz);
 694                 return -EINVAL;
 695         }
 696
 697         /* Is it a packet type we know about ? */
 698         switch (header & 0xff00) {
 699         case RADEON_3D_LOAD_VBPNTR:     /* load vertex array pointers */
 700                 return r300_emit_3d_load_vbpntr(dev_priv, cmdbuf, header);
 701
 702         case RADEON_CNTL_BITBLT_MULTI:
 703                 return r300_emit_bitblt_multi(dev_priv, cmdbuf);
 704
 705         case RADEON_CP_INDX_BUFFER:
 706                 DRM_ERROR("packet3 INDX_BUFFER without preceding 3D_DRAW_INDX_2 is illegal.\n");
 707                 return -EINVAL;
 708         case RADEON_CP_3D_DRAW_IMMD_2:
 709                 /* triggers drawing using in-packet vertex data */
 710         case RADEON_CP_3D_DRAW_VBUF_2:
 711                 /* triggers drawing of vertex buffers setup elsewhere */
 712                 dev_priv->track_flush &= ~(RADEON_FLUSH_EMITED |
 713                                            RADEON_PURGE_EMITED);
 714                 break;
 715         case RADEON_CP_3D_DRAW_INDX_2:
 716                 /* triggers drawing using indices to vertex buffer */
 717                 /* whenever we send vertex we clear flush & purge */
 718                 dev_priv->track_flush &= ~(RADEON_FLUSH_EMITED |
 719                                            RADEON_PURGE_EMITED);
 720                 return r300_emit_draw_indx_2(dev_priv, cmdbuf);
 721         case RADEON_WAIT_FOR_IDLE:
 722         case RADEON_CP_NOP:
 723                 /* these packets are safe */
 724                 break;
 725         default:
 726                 DRM_ERROR("Unknown packet3 header (0x%08x)\n", header);
 727                 return -EINVAL;
 728         }
 729
 730         BEGIN_RING(count + 2);
 731         OUT_RING(header);
 732         OUT_RING_TABLE((int *)(cmdbuf->buf + 4), count + 1);
 733         ADVANCE_RING();
 734
 735         cmdbuf->buf += (count + 2) * 4;
 736         cmdbuf->bufsz -= (count + 2) * 4;
 737
 738         return 0;
 739 }
 740
 741 /**
 742  * Emit a rendering packet3 from userspace.
 743  * Called by r300_do_cp_cmdbuf.
 744  */
 745 static __inline__ int r300_emit_packet3(drm_radeon_private_t *dev_priv,
 746                                         drm_radeon_kcmd_buffer_t *cmdbuf,
 747                                         drm_r300_cmd_header_t header)
 748 {
 749         int n;
 750         int ret;
 751         char *orig_buf = cmdbuf->buf;
 752         int orig_bufsz = cmdbuf->bufsz;
 753
 754         /* This is a do-while-loop so that we run the interior at least once,
 755          * even if cmdbuf->nbox is 0. Compare r300_emit_cliprects for rationale.
 756          */
 757         n = 0;
 758         do {
 759                 if (cmdbuf->nbox > R300_SIMULTANEOUS_CLIPRECTS) {
 760                         ret = r300_emit_cliprects(dev_priv, cmdbuf, n);
 761                         if (ret)
 762                                 return ret;
 763
 764                         cmdbuf->buf = orig_buf;
 765                         cmdbuf->bufsz = orig_bufsz;
 766                 }
 767
 768                 switch (header.packet3.packet) {
 769                 case R300_CMD_PACKET3_CLEAR:
 770                         DRM_DEBUG("R300_CMD_PACKET3_CLEAR\n");
 771                         ret = r300_emit_clear(dev_priv, cmdbuf);
 772                         if (ret) {
 773                                 DRM_ERROR("r300_emit_clear failed\n");
 774                                 return ret;
 775                         }
 776                         break;
 777
 778                 case R300_CMD_PACKET3_RAW:
 779                         DRM_DEBUG("R300_CMD_PACKET3_RAW\n");
 780                         ret = r300_emit_raw_packet3(dev_priv, cmdbuf);
 781                         if (ret) {
 782                                 DRM_ERROR("r300_emit_raw_packet3 failed\n");
 783                                 return ret;
 784                         }
 785                         break;
 786
 787                 default:
 788                         DRM_ERROR("bad packet3 type %i at %p\n",
 789                                   header.packet3.packet,
 790                                   cmdbuf->buf - sizeof(header));
 791                         return -EINVAL;
 792                 }
 793
 794                 n += R300_SIMULTANEOUS_CLIPRECTS;
 795         } while (n < cmdbuf->nbox);
 796
 797         return 0;
 798 }
 799
 800 /* Some of the R300 chips seem to be extremely touchy about the two registers
 801  * that are configured in r300_pacify.
 802  * Among the worst offenders seems to be the R300 ND (0x4E44): When userspace
 803  * sends a command buffer that contains only state setting commands and a
 804  * vertex program/parameter upload sequence, this will eventually lead to a
 805  * lockup, unless the sequence is bracketed by calls to r300_pacify.
 806  * So we should take great care to *always* call r300_pacify before
 807  * *anything* 3D related, and again afterwards. This is what the
 808  * call bracket in r300_do_cp_cmdbuf is for.
 809  */
 810
 811 /**
 812  * Emit the sequence to pacify R300.
 813  */
 814 static __inline__ void r300_pacify(drm_radeon_private_t *dev_priv)
 815 {
 816         uint32_t cache_z, cache_3d, cache_2d;
 817         RING_LOCALS;
 818
 819         cache_z = R300_ZC_FLUSH;
 820         cache_2d = R300_RB2D_DC_FLUSH;
 821         cache_3d = R300_RB3D_DC_FLUSH;
 822         if (!(dev_priv->track_flush & RADEON_PURGE_EMITED)) {
 823                 /* we can purge, primitive where draw since last purge */
 824                 cache_z |= R300_ZC_FREE;
 825                 cache_2d |= R300_RB2D_DC_FREE;
 826                 cache_3d |= R300_RB3D_DC_FREE;
 827         }
 828
 829         /* flush & purge zbuffer */
 830         BEGIN_RING(2);
 831         OUT_RING(CP_PACKET0(R300_ZB_ZCACHE_CTLSTAT, 0));
 832         OUT_RING(cache_z);
 833         ADVANCE_RING();
 834         /* flush & purge 3d */
 835         BEGIN_RING(2);
 836         OUT_RING(CP_PACKET0(R300_RB3D_DSTCACHE_CTLSTAT, 0));
 837         OUT_RING(cache_3d);
 838         ADVANCE_RING();
 839         /* flush & purge texture */
 840         BEGIN_RING(2);
 841         OUT_RING(CP_PACKET0(R300_TX_INVALTAGS, 0));
 842         OUT_RING(0);
 843         ADVANCE_RING();
 844         /* FIXME: is this one really needed ? */
 845         BEGIN_RING(2);
 846         OUT_RING(CP_PACKET0(R300_RB3D_AARESOLVE_CTL, 0));
 847         OUT_RING(0);
 848         ADVANCE_RING();
 849         BEGIN_RING(2);
 850         OUT_RING(CP_PACKET0(RADEON_WAIT_UNTIL, 0));
 851         OUT_RING(RADEON_WAIT_3D_IDLECLEAN);
 852         ADVANCE_RING();
 853         /* flush & purge 2d through E2 as RB2D will trigger lockup */
 854         BEGIN_RING(4);
 855         OUT_RING(CP_PACKET0(R300_DSTCACHE_CTLSTAT, 0));
 856         OUT_RING(cache_2d);
 857         OUT_RING(CP_PACKET0(RADEON_WAIT_UNTIL, 0));
 858         OUT_RING(RADEON_WAIT_2D_IDLECLEAN |
 859                  RADEON_WAIT_HOST_IDLECLEAN);
 860         ADVANCE_RING();
 861         /* set flush & purge flags */
 862         dev_priv->track_flush |= RADEON_FLUSH_EMITED | RADEON_PURGE_EMITED;
 863 }
 864
 865 /**
 866  * Called by r300_do_cp_cmdbuf to update the internal buffer age and state.
 867  * The actual age emit is done by r300_do_cp_cmdbuf, which is why you must
 868  * be careful about how this function is called.
 869  */
 870 static void r300_discard_buffer(struct drm_device *dev, struct drm_master *master, struct drm_buf *buf)
 871 {
 872         drm_radeon_buf_priv_t *buf_priv = buf->dev_private;
 873         struct drm_radeon_master_private *master_priv = master->driver_priv;
 874
 875         buf_priv->age = ++master_priv->sarea_priv->last_dispatch;
 876         buf->pending = 1;
 877         buf->used = 0;
 878 }
 879
 880 static void r300_cmd_wait(drm_radeon_private_t * dev_priv,
 881                           drm_r300_cmd_header_t header)
 882 {
 883         u32 wait_until;
 884         RING_LOCALS;
 885
 886         if (!header.wait.flags)
 887                 return;
 888
 889         wait_until = 0;
 890
 891         switch(header.wait.flags) {
 892         case R300_WAIT_2D:
 893                 wait_until = RADEON_WAIT_2D_IDLE;
 894                 break;
 895         case R300_WAIT_3D:
 896                 wait_until = RADEON_WAIT_3D_IDLE;
 897                 break;
 898         case R300_NEW_WAIT_2D_3D:
 899                 wait_until = RADEON_WAIT_2D_IDLE|RADEON_WAIT_3D_IDLE;
 900                 break;
 901         case R300_NEW_WAIT_2D_2D_CLEAN:
 902                 wait_until = RADEON_WAIT_2D_IDLE|RADEON_WAIT_2D_IDLECLEAN;
 903                 break;
 904         case R300_NEW_WAIT_3D_3D_CLEAN:
 905                 wait_until = RADEON_WAIT_3D_IDLE|RADEON_WAIT_3D_IDLECLEAN;
 906                 break;
 907         case R300_NEW_WAIT_2D_2D_CLEAN_3D_3D_CLEAN:
 908                 wait_until = RADEON_WAIT_2D_IDLE|RADEON_WAIT_2D_IDLECLEAN;
 909                 wait_until |= RADEON_WAIT_3D_IDLE|RADEON_WAIT_3D_IDLECLEAN;
 910                 break;
 911         default:
 912                 return;
 913         }
 914
 915         BEGIN_RING(2);
 916         OUT_RING(CP_PACKET0(RADEON_WAIT_UNTIL, 0));
 917         OUT_RING(wait_until);
 918         ADVANCE_RING();
 919 }
 920
 921 static int r300_scratch(drm_radeon_private_t *dev_priv,
 922                         drm_radeon_kcmd_buffer_t *cmdbuf,
 923                         drm_r300_cmd_header_t header)
 924 {
 925         u32 *ref_age_base;
 926         u32 i, buf_idx, h_pending;
 927         u64 ptr_addr;
 928         RING_LOCALS;
 929
 930         if (cmdbuf->bufsz <
 931             (sizeof(u64) + header.scratch.n_bufs * sizeof(buf_idx))) {
 932                 return -EINVAL;
 933         }
 934
 935         if (header.scratch.reg >= 5) {
 936                 return -EINVAL;
 937         }
 938
 939         dev_priv->scratch_ages[header.scratch.reg]++;
 940
 941         ptr_addr = get_unaligned((u64 *)cmdbuf->buf);
 942         ref_age_base = (u32 *)(unsigned long)ptr_addr;
 943
 944         cmdbuf->buf += sizeof(u64);
 945         cmdbuf->bufsz -= sizeof(u64);
 946
 947         for (i=0; i < header.scratch.n_bufs; i++) {
 948                 buf_idx = *(u32 *)cmdbuf->buf;
 949                 buf_idx *= 2; /* 8 bytes per buf */
 950
 951                 if (DRM_COPY_TO_USER(ref_age_base + buf_idx, &dev_priv->scratch_ages[header.scratch.reg], sizeof(u32))) {
 952                         return -EINVAL;
 953                 }
 954
 955                 if (DRM_COPY_FROM_USER(&h_pending, ref_age_base + buf_idx + 1, sizeof(u32))) {
 956                         return -EINVAL;
 957                 }
 958
 959                 if (h_pending == 0) {
 960                         return -EINVAL;
 961                 }
 962
 963                 h_pending--;
 964
 965                 if (DRM_COPY_TO_USER(ref_age_base + buf_idx + 1, &h_pending, sizeof(u32))) {
 966                         return -EINVAL;
 967                 }
 968
 969                 cmdbuf->buf += sizeof(buf_idx);
 970                 cmdbuf->bufsz -= sizeof(buf_idx);
 971         }
 972
 973         BEGIN_RING(2);
 974         OUT_RING( CP_PACKET0( RADEON_SCRATCH_REG0 + header.scratch.reg * 4, 0 ) );
 975         OUT_RING( dev_priv->scratch_ages[header.scratch.reg] );
 976         ADVANCE_RING();
 977
 978         return 0;
 979 }
 980
 981 /**
 982  * Uploads user-supplied vertex program instructions or parameters onto
 983  * the graphics card.
 984  * Called by r300_do_cp_cmdbuf.
 985  */
 986 static inline int r300_emit_r500fp(drm_radeon_private_t *dev_priv,
 987                                        drm_radeon_kcmd_buffer_t *cmdbuf,
 988                                        drm_r300_cmd_header_t header)
 989 {
 990         int sz;
 991         int addr;
 992         int type;
 993         int isclamp;
 994         int stride;
 995         RING_LOCALS;
 996
 997         sz = header.r500fp.count;
 998         /* address is 9 bits 0 - 8, bit 1 of flags is part of address */
 999         addr = ((header.r500fp.adrhi_flags & 1) << 8) | header.r500fp.adrlo;
1000
1001         type = !!(header.r500fp.adrhi_flags & R500FP_CONSTANT_TYPE);
1002         isclamp = !!(header.r500fp.adrhi_flags & R500FP_CONSTANT_CLAMP);
1003
1004         addr |= (type << 16);
1005         addr |= (isclamp << 17);
1006
1007         stride = type ? 4 : 6;
1008
1009         DRM_DEBUG("r500fp %d %d type: %d\n", sz, addr, type);
1010         if (!sz)
1011                 return 0;
1012         if (sz * stride * 4 > cmdbuf->bufsz)
1013                 return -EINVAL;
1014
1015         BEGIN_RING(3 + sz * stride);
1016         OUT_RING_REG(R500_GA_US_VECTOR_INDEX, addr);
1017         OUT_RING(CP_PACKET0_TABLE(R500_GA_US_VECTOR_DATA, sz * stride - 1));
1018         OUT_RING_TABLE((int *)cmdbuf->buf, sz * stride);
1019
1020         ADVANCE_RING();
1021
1022         cmdbuf->buf += sz * stride * 4;
1023         cmdbuf->bufsz -= sz * stride * 4;
1024
1025         return 0;
1026 }
1027
1028
1029 /**
1030  * Parses and validates a user-supplied command buffer and emits appropriate
1031  * commands on the DMA ring buffer.
1032  * Called by the ioctl handler function radeon_cp_cmdbuf.
1033  */
1034 int r300_do_cp_cmdbuf(struct drm_device *dev,
1035                       struct drm_file *file_priv,
1036                       drm_radeon_kcmd_buffer_t *cmdbuf)
1037 {
1038         drm_radeon_private_t *dev_priv = dev->dev_private;
1039         struct drm_radeon_master_private *master_priv = file_priv->master->driver_priv;
1040         struct drm_device_dma *dma = dev->dma;
1041         struct drm_buf *buf = NULL;
1042         int emit_dispatch_age = 0;
1043         int ret = 0;
1044
1045         DRM_DEBUG("\n");
1046
1047         /* pacify */
1048         r300_pacify(dev_priv);
1049
1050         if (cmdbuf->nbox <= R300_SIMULTANEOUS_CLIPRECTS) {
1051                 ret = r300_emit_cliprects(dev_priv, cmdbuf, 0);
1052                 if (ret)
1053                         goto cleanup;
1054         }
1055
1056         while (cmdbuf->bufsz >= sizeof(drm_r300_cmd_header_t)) {
1057                 int idx;
1058                 drm_r300_cmd_header_t header;
1059
1060                 header.u = *(unsigned int *)cmdbuf->buf;
1061
1062                 cmdbuf->buf += sizeof(header);
1063                 cmdbuf->bufsz -= sizeof(header);
1064
1065                 switch (header.header.cmd_type) {
1066                 case R300_CMD_PACKET0:
1067                         DRM_DEBUG("R300_CMD_PACKET0\n");
1068                         ret = r300_emit_packet0(dev_priv, cmdbuf, header);
1069                         if (ret) {
1070                                 DRM_ERROR("r300_emit_packet0 failed\n");
1071                                 goto cleanup;
1072                         }
1073                         break;
1074
1075                 case R300_CMD_VPU:
1076                         DRM_DEBUG("R300_CMD_VPU\n");
1077                         ret = r300_emit_vpu(dev_priv, cmdbuf, header);
1078                         if (ret) {
1079                                 DRM_ERROR("r300_emit_vpu failed\n");
1080                                 goto cleanup;
1081                         }
1082                         break;
1083
1084                 case R300_CMD_PACKET3:
1085                         DRM_DEBUG("R300_CMD_PACKET3\n");
1086                         ret = r300_emit_packet3(dev_priv, cmdbuf, header);
1087                         if (ret) {
1088                                 DRM_ERROR("r300_emit_packet3 failed\n");
1089                                 goto cleanup;
1090                         }
1091                         break;
1092
1093                 case R300_CMD_END3D:
1094                         DRM_DEBUG("R300_CMD_END3D\n");
1095                         /* TODO:
1096                            Ideally userspace driver should not need to issue this call,
1097                            i.e. the drm driver should issue it automatically and prevent
1098                            lockups.
1099
1100                            In practice, we do not understand why this call is needed and what
1101                            it does (except for some vague guesses that it has to do with cache
1102                            coherence) and so the user space driver does it.
1103
1104                            Once we are sure which uses prevent lockups the code could be moved
1105                            into the kernel and the userspace driver will not
1106                            need to use this command.
1107
1108                            Note that issuing this command does not hurt anything
1109                            except, possibly, performance */
1110                         r300_pacify(dev_priv);
1111                         break;
1112
1113                 case R300_CMD_CP_DELAY:
1114                         /* simple enough, we can do it here */
1115                         DRM_DEBUG("R300_CMD_CP_DELAY\n");
1116                         {
1117                                 int i;
1118                                 RING_LOCALS;
1119
1120                                 BEGIN_RING(header.delay.count);
1121                                 for (i = 0; i < header.delay.count; i++)
1122                                         OUT_RING(RADEON_CP_PACKET2);
1123                                 ADVANCE_RING();
1124                         }
1125                         break;
1126
1127                 case R300_CMD_DMA_DISCARD:
1128                         DRM_DEBUG("RADEON_CMD_DMA_DISCARD\n");
1129                         idx = header.dma.buf_idx;
1130                         if (idx < 0 || idx >= dma->buf_count) {
1131                                 DRM_ERROR("buffer index %d (of %d max)\n",
1132                                           idx, dma->buf_count - 1);
1133                                 ret = -EINVAL;
1134                                 goto cleanup;
1135                         }
1136
1137                         buf = dma->buflist[idx];
1138                         if (buf->file_priv != file_priv || buf->pending) {
1139                                 DRM_ERROR("bad buffer %p %p %d\n",
1140                                           buf->file_priv, file_priv,
1141                                           buf->pending);
1142                                 ret = -EINVAL;
1143                                 goto cleanup;
1144                         }
1145
1146                         emit_dispatch_age = 1;
1147                         r300_discard_buffer(dev, file_priv->master, buf);
1148                         break;
1149
1150                 case R300_CMD_WAIT:
1151                         DRM_DEBUG("R300_CMD_WAIT\n");
1152                         r300_cmd_wait(dev_priv, header);
1153                         break;
1154
1155                 case R300_CMD_SCRATCH:
1156                         DRM_DEBUG("R300_CMD_SCRATCH\n");
1157                         ret = r300_scratch(dev_priv, cmdbuf, header);
1158                         if (ret) {
1159                                 DRM_ERROR("r300_scratch failed\n");
1160                                 goto cleanup;
1161                         }
1162                         break;
1163
1164                 case R300_CMD_R500FP:
1165                         if ((dev_priv->flags & RADEON_FAMILY_MASK) < CHIP_RV515) {
1166                                 DRM_ERROR("Calling r500 command on r300 card\n");
1167                                 ret = -EINVAL;
1168                                 goto cleanup;
1169                         }
1170                         DRM_DEBUG("R300_CMD_R500FP\n");
1171                         ret = r300_emit_r500fp(dev_priv, cmdbuf, header);
1172                         if (ret) {
1173                                 DRM_ERROR("r300_emit_r500fp failed\n");
1174                                 goto cleanup;
1175                         }
1176                         break;
1177                 default:
1178                         DRM_ERROR("bad cmd_type %i at %p\n",
1179                                   header.header.cmd_type,
1180                                   cmdbuf->buf - sizeof(header));
1181                         ret = -EINVAL;
1182                         goto cleanup;
1183                 }
1184         }
1185
1186         DRM_DEBUG("END\n");
1187
1188       cleanup:
1189         r300_pacify(dev_priv);
1190
1191         /* We emit the vertex buffer age here, outside the pacifier "brackets"
1192          * for two reasons:
1193          *  (1) This may coalesce multiple age emissions into a single one and
1194          *  (2) more importantly, some chips lock up hard when scratch registers
1195          *      are written inside the pacifier bracket.
1196          */
1197         if (emit_dispatch_age) {
1198                 RING_LOCALS;
1199
1200                 /* Emit the vertex buffer age */
1201                 BEGIN_RING(2);
1202                 RADEON_DISPATCH_AGE(master_priv->sarea_priv->last_dispatch);
1203                 ADVANCE_RING();
1204         }
1205
1206         COMMIT_RING();
1207
1208         return ret;
1209 }