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 "drm_buffer.h"
  37 #include "radeon_drm.h"
  38 #include "radeon_drv.h"
  39 #include "r300_reg.h"
  40
  41 #include <asm/unaligned.h>
  42
  43 #define R300_SIMULTANEOUS_CLIPRECTS             4
  44
  45 /* Values for R300_RE_CLIPRECT_CNTL depending on the number of cliprects
  46  */
  47 static const int r300_cliprect_cntl[4] = {
  48         0xAAAA,
  49         0xEEEE,
  50         0xFEFE,
  51         0xFFFE
  52 };
  53
  54 /**
  55  * Emit up to R300_SIMULTANEOUS_CLIPRECTS cliprects from the given command
  56  * buffer, starting with index n.
  57  */
  58 static int r300_emit_cliprects(drm_radeon_private_t *dev_priv,
  59                                drm_radeon_kcmd_buffer_t *cmdbuf, int n)
  60 {
  61         struct drm_clip_rect box;
  62         int nr;
  63         int i;
  64         RING_LOCALS;
  65
  66         nr = cmdbuf->nbox - n;
  67         if (nr > R300_SIMULTANEOUS_CLIPRECTS)
  68                 nr = R300_SIMULTANEOUS_CLIPRECTS;
  69
  70         DRM_DEBUG("%i cliprects\n", nr);
  71
  72         if (nr) {
  73                 BEGIN_RING(6 + nr * 2);
  74                 OUT_RING(CP_PACKET0(R300_RE_CLIPRECT_TL_0, nr * 2 - 1));
  75
  76                 for (i = 0; i < nr; ++i) {
  77                         if (DRM_COPY_FROM_USER_UNCHECKED
  78                             (&box, &cmdbuf->boxes[n + i], sizeof(box))) {
  79                                 DRM_ERROR("copy cliprect faulted\n");
  80                                 return -EFAULT;
  81                         }
  82
  83                         box.x2--; /* Hardware expects inclusive bottom-right corner */
  84                         box.y2--;
  85
  86                         if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_RV515) {
  87                                 box.x1 = (box.x1) &
  88                                         R300_CLIPRECT_MASK;
  89                                 box.y1 = (box.y1) &
  90                                         R300_CLIPRECT_MASK;
  91                                 box.x2 = (box.x2) &
  92                                         R300_CLIPRECT_MASK;
  93                                 box.y2 = (box.y2) &
  94                                         R300_CLIPRECT_MASK;
  95                         } else {
  96                                 box.x1 = (box.x1 + R300_CLIPRECT_OFFSET) &
  97                                         R300_CLIPRECT_MASK;
  98                                 box.y1 = (box.y1 + R300_CLIPRECT_OFFSET) &
  99                                         R300_CLIPRECT_MASK;
 100                                 box.x2 = (box.x2 + R300_CLIPRECT_OFFSET) &
 101                                         R300_CLIPRECT_MASK;
 102                                 box.y2 = (box.y2 + R300_CLIPRECT_OFFSET) &
 103                                         R300_CLIPRECT_MASK;
 104                         }
 105
 106                         OUT_RING((box.x1 << R300_CLIPRECT_X_SHIFT) |
 107                                  (box.y1 << R300_CLIPRECT_Y_SHIFT));
 108                         OUT_RING((box.x2 << R300_CLIPRECT_X_SHIFT) |
 109                                  (box.y2 << R300_CLIPRECT_Y_SHIFT));
 110
 111                 }
 112
 113                 OUT_RING_REG(R300_RE_CLIPRECT_CNTL, r300_cliprect_cntl[nr - 1]);
 114
 115                 /* TODO/SECURITY: Force scissors to a safe value, otherwise the
 116                  * client might be able to trample over memory.
 117                  * The impact should be very limited, but I'd rather be safe than
 118                  * sorry.
 119                  */
 120                 OUT_RING(CP_PACKET0(R300_RE_SCISSORS_TL, 1));
 121                 OUT_RING(0);
 122                 OUT_RING(R300_SCISSORS_X_MASK | R300_SCISSORS_Y_MASK);
 123                 ADVANCE_RING();
 124         } else {
 125                 /* Why we allow zero cliprect rendering:
 126                  * There are some commands in a command buffer that must be submitted
 127                  * even when there are no cliprects, e.g. DMA buffer discard
 128                  * or state setting (though state setting could be avoided by
 129                  * simulating a loss of context).
 130                  *
 131                  * Now since the cmdbuf interface is so chaotic right now (and is
 132                  * bound to remain that way for a bit until things settle down),
 133                  * it is basically impossible to filter out the commands that are
 134                  * necessary and those that aren't.
 135                  *
 136                  * So I choose the safe way and don't do any filtering at all;
 137                  * instead, I simply set up the engine so that all rendering
 138                  * can't produce any fragments.
 139                  */
 140                 BEGIN_RING(2);
 141                 OUT_RING_REG(R300_RE_CLIPRECT_CNTL, 0);
 142                 ADVANCE_RING();
 143         }
 144
 145         /* flus cache and wait idle clean after cliprect change */
 146         BEGIN_RING(2);
 147         OUT_RING(CP_PACKET0(R300_RB3D_DSTCACHE_CTLSTAT, 0));
 148         OUT_RING(R300_RB3D_DC_FLUSH);
 149         ADVANCE_RING();
 150         BEGIN_RING(2);
 151         OUT_RING(CP_PACKET0(RADEON_WAIT_UNTIL, 0));
 152         OUT_RING(RADEON_WAIT_3D_IDLECLEAN);
 153         ADVANCE_RING();
 154         /* set flush flag */
 155         dev_priv->track_flush |= RADEON_FLUSH_EMITED;
 156
 157         return 0;
 158 }
 159
 160 static u8 r300_reg_flags[0x10000 >> 2];
 161
 162 void r300_init_reg_flags(struct drm_device *dev)
 163 {
 164         int i;
 165         drm_radeon_private_t *dev_priv = dev->dev_private;
 166
 167         memset(r300_reg_flags, 0, 0x10000 >> 2);
 168 #define ADD_RANGE_MARK(reg, count,mark) \
 169                 for(i=((reg)>>2);i<((reg)>>2)+(count);i++)\
 170                         r300_reg_flags[i]|=(mark);
 171
 172 #define MARK_SAFE               1
 173 #define MARK_CHECK_OFFSET       2
 174
 175 #define ADD_RANGE(reg, count)   ADD_RANGE_MARK(reg, count, MARK_SAFE)
 176
 177         /* these match cmducs() command in r300_driver/r300/r300_cmdbuf.c */
 178         ADD_RANGE(R300_SE_VPORT_XSCALE, 6);
 179         ADD_RANGE(R300_VAP_CNTL, 1);
 180         ADD_RANGE(R300_SE_VTE_CNTL, 2);
 181         ADD_RANGE(0x2134, 2);
 182         ADD_RANGE(R300_VAP_CNTL_STATUS, 1);
 183         ADD_RANGE(R300_VAP_INPUT_CNTL_0, 2);
 184         ADD_RANGE(0x21DC, 1);
 185         ADD_RANGE(R300_VAP_UNKNOWN_221C, 1);
 186         ADD_RANGE(R300_VAP_CLIP_X_0, 4);
 187         ADD_RANGE(R300_VAP_PVS_STATE_FLUSH_REG, 1);
 188         ADD_RANGE(R300_VAP_UNKNOWN_2288, 1);
 189         ADD_RANGE(R300_VAP_OUTPUT_VTX_FMT_0, 2);
 190         ADD_RANGE(R300_VAP_PVS_CNTL_1, 3);
 191         ADD_RANGE(R300_GB_ENABLE, 1);
 192         ADD_RANGE(R300_GB_MSPOS0, 5);
 193         ADD_RANGE(R300_TX_INVALTAGS, 1);
 194         ADD_RANGE(R300_TX_ENABLE, 1);
 195         ADD_RANGE(0x4200, 4);
 196         ADD_RANGE(0x4214, 1);
 197         ADD_RANGE(R300_RE_POINTSIZE, 1);
 198         ADD_RANGE(0x4230, 3);
 199         ADD_RANGE(R300_RE_LINE_CNT, 1);
 200         ADD_RANGE(R300_RE_UNK4238, 1);
 201         ADD_RANGE(0x4260, 3);
 202         ADD_RANGE(R300_RE_SHADE, 4);
 203         ADD_RANGE(R300_RE_POLYGON_MODE, 5);
 204         ADD_RANGE(R300_RE_ZBIAS_CNTL, 1);
 205         ADD_RANGE(R300_RE_ZBIAS_T_FACTOR, 4);
 206         ADD_RANGE(R300_RE_OCCLUSION_CNTL, 1);
 207         ADD_RANGE(R300_RE_CULL_CNTL, 1);
 208         ADD_RANGE(0x42C0, 2);
 209         ADD_RANGE(R300_RS_CNTL_0, 2);
 210
 211         ADD_RANGE(R300_SU_REG_DEST, 1);
 212         if ((dev_priv->flags & RADEON_FAMILY_MASK) == CHIP_RV530)
 213                 ADD_RANGE(RV530_FG_ZBREG_DEST, 1);
 214
 215         ADD_RANGE(R300_SC_HYPERZ, 2);
 216         ADD_RANGE(0x43E8, 1);
 217
 218         ADD_RANGE(0x46A4, 5);
 219
 220         ADD_RANGE(R300_RE_FOG_STATE, 1);
 221         ADD_RANGE(R300_FOG_COLOR_R, 3);
 222         ADD_RANGE(R300_PP_ALPHA_TEST, 2);
 223         ADD_RANGE(0x4BD8, 1);
 224         ADD_RANGE(R300_PFS_PARAM_0_X, 64);
 225         ADD_RANGE(0x4E00, 1);
 226         ADD_RANGE(R300_RB3D_CBLEND, 2);
 227         ADD_RANGE(R300_RB3D_COLORMASK, 1);
 228         ADD_RANGE(R300_RB3D_BLEND_COLOR, 3);
 229         ADD_RANGE_MARK(R300_RB3D_COLOROFFSET0, 1, MARK_CHECK_OFFSET);   /* check offset */
 230         ADD_RANGE(R300_RB3D_COLORPITCH0, 1);
 231         ADD_RANGE(0x4E50, 9);
 232         ADD_RANGE(0x4E88, 1);
 233         ADD_RANGE(0x4EA0, 2);
 234         ADD_RANGE(R300_ZB_CNTL, 3);
 235         ADD_RANGE(R300_ZB_FORMAT, 4);
 236         ADD_RANGE_MARK(R300_ZB_DEPTHOFFSET, 1, MARK_CHECK_OFFSET);      /* check offset */
 237         ADD_RANGE(R300_ZB_DEPTHPITCH, 1);
 238         ADD_RANGE(R300_ZB_DEPTHCLEARVALUE, 1);
 239         ADD_RANGE(R300_ZB_ZMASK_OFFSET, 13);
 240         ADD_RANGE(R300_ZB_ZPASS_DATA, 2); /* ZB_ZPASS_DATA, ZB_ZPASS_ADDR */
 241
 242         ADD_RANGE(R300_TX_FILTER_0, 16);
 243         ADD_RANGE(R300_TX_FILTER1_0, 16);
 244         ADD_RANGE(R300_TX_SIZE_0, 16);
 245         ADD_RANGE(R300_TX_FORMAT_0, 16);
 246         ADD_RANGE(R300_TX_PITCH_0, 16);
 247         /* Texture offset is dangerous and needs more checking */
 248         ADD_RANGE_MARK(R300_TX_OFFSET_0, 16, MARK_CHECK_OFFSET);
 249         ADD_RANGE(R300_TX_CHROMA_KEY_0, 16);
 250         ADD_RANGE(R300_TX_BORDER_COLOR_0, 16);
 251
 252         /* Sporadic registers used as primitives are emitted */
 253         ADD_RANGE(R300_ZB_ZCACHE_CTLSTAT, 1);
 254         ADD_RANGE(R300_RB3D_DSTCACHE_CTLSTAT, 1);
 255         ADD_RANGE(R300_VAP_INPUT_ROUTE_0_0, 8);
 256         ADD_RANGE(R300_VAP_INPUT_ROUTE_1_0, 8);
 257
 258         if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_RV515) {
 259                 ADD_RANGE(R500_VAP_INDEX_OFFSET, 1);
 260                 ADD_RANGE(R500_US_CONFIG, 2);
 261                 ADD_RANGE(R500_US_CODE_ADDR, 3);
 262                 ADD_RANGE(R500_US_FC_CTRL, 1);
 263                 ADD_RANGE(R500_RS_IP_0, 16);
 264                 ADD_RANGE(R500_RS_INST_0, 16);
 265                 ADD_RANGE(R500_RB3D_COLOR_CLEAR_VALUE_AR, 2);
 266                 ADD_RANGE(R500_RB3D_CONSTANT_COLOR_AR, 2);
 267                 ADD_RANGE(R500_ZB_FIFO_SIZE, 2);
 268         } else {
 269                 ADD_RANGE(R300_PFS_CNTL_0, 3);
 270                 ADD_RANGE(R300_PFS_NODE_0, 4);
 271                 ADD_RANGE(R300_PFS_TEXI_0, 64);
 272                 ADD_RANGE(R300_PFS_INSTR0_0, 64);
 273                 ADD_RANGE(R300_PFS_INSTR1_0, 64);
 274                 ADD_RANGE(R300_PFS_INSTR2_0, 64);
 275                 ADD_RANGE(R300_PFS_INSTR3_0, 64);
 276                 ADD_RANGE(R300_RS_INTERP_0, 8);
 277                 ADD_RANGE(R300_RS_ROUTE_0, 8);
 278
 279         }
 280 }
 281
 282 static __inline__ int r300_check_range(unsigned reg, int count)
 283 {
 284         int i;
 285         if (reg & ~0xffff)
 286                 return -1;
 287         for (i = (reg >> 2); i < (reg >> 2) + count; i++)
 288                 if (r300_reg_flags[i] != MARK_SAFE)
 289                         return 1;
 290         return 0;
 291 }
 292
 293 static __inline__ int r300_emit_carefully_checked_packet0(drm_radeon_private_t *
 294                                                           dev_priv,
 295                                                           drm_radeon_kcmd_buffer_t
 296                                                           * cmdbuf,
 297                                                           drm_r300_cmd_header_t
 298                                                           header)
 299 {
 300         int reg;
 301         int sz;
 302         int i;
 303         u32 *value;
 304         RING_LOCALS;
 305
 306         sz = header.packet0.count;
 307         reg = (header.packet0.reghi << 8) | header.packet0.reglo;
 308
 309         if ((sz > 64) || (sz < 0)) {
 310                 DRM_ERROR("Cannot emit more than 64 values at a time (reg=%04x sz=%d)\n",
 311                          reg, sz);
 312                 return -EINVAL;
 313         }
 314
 315         for (i = 0; i < sz; i++) {
 316                 switch (r300_reg_flags[(reg >> 2) + i]) {
 317                 case MARK_SAFE:
 318                         break;
 319                 case MARK_CHECK_OFFSET:
 320                         value = drm_buffer_pointer_to_dword(cmdbuf->buffer, i);
 321                         if (!radeon_check_offset(dev_priv, *value)) {
 322                                 DRM_ERROR("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_DRM_BUFFER(cmdbuf->buffer, sz);
 337         ADVANCE_RING();
 338
 339         return 0;
 340 }
 341
 342 /**
 343  * Emits a packet0 setting arbitrary registers.
 344  * Called by r300_do_cp_cmdbuf.
 345  *
 346  * Note that checks are performed on contents and addresses of the registers
 347  */
 348 static __inline__ int r300_emit_packet0(drm_radeon_private_t *dev_priv,
 349                                         drm_radeon_kcmd_buffer_t *cmdbuf,
 350                                         drm_r300_cmd_header_t header)
 351 {
 352         int reg;
 353         int sz;
 354         RING_LOCALS;
 355
 356         sz = header.packet0.count;
 357         reg = (header.packet0.reghi << 8) | header.packet0.reglo;
 358
 359         if (!sz)
 360                 return 0;
 361
 362         if (sz * 4 > drm_buffer_unprocessed(cmdbuf->buffer))
 363                 return -EINVAL;
 364
 365         if (reg + sz * 4 >= 0x10000) {
 366                 DRM_ERROR("No such registers in hardware reg=%04x sz=%d\n", reg,
 367                           sz);
 368                 return -EINVAL;
 369         }
 370
 371         if (r300_check_range(reg, sz)) {
 372                 /* go and check everything */
 373                 return r300_emit_carefully_checked_packet0(dev_priv, cmdbuf,
 374                                                            header);
 375         }
 376         /* the rest of the data is safe to emit, whatever the values the user passed */
 377
 378         BEGIN_RING(1 + sz);
 379         OUT_RING(CP_PACKET0(reg, sz - 1));
 380         OUT_RING_DRM_BUFFER(cmdbuf->buffer, sz);
 381         ADVANCE_RING();
 382
 383         return 0;
 384 }
 385
 386 /**
 387  * Uploads user-supplied vertex program instructions or parameters onto
 388  * the graphics card.
 389  * Called by r300_do_cp_cmdbuf.
 390  */
 391 static __inline__ int r300_emit_vpu(drm_radeon_private_t *dev_priv,
 392                                     drm_radeon_kcmd_buffer_t *cmdbuf,
 393                                     drm_r300_cmd_header_t header)
 394 {
 395         int sz;
 396         int addr;
 397         RING_LOCALS;
 398
 399         sz = header.vpu.count;
 400         addr = (header.vpu.adrhi << 8) | header.vpu.adrlo;
 401
 402         if (!sz)
 403                 return 0;
 404         if (sz * 16 > drm_buffer_unprocessed(cmdbuf->buffer))
 405                 return -EINVAL;
 406
 407         /* VAP is very sensitive so we purge cache before we program it
 408          * and we also flush its state before & after */
 409         BEGIN_RING(6);
 410         OUT_RING(CP_PACKET0(R300_RB3D_DSTCACHE_CTLSTAT, 0));
 411         OUT_RING(R300_RB3D_DC_FLUSH);
 412         OUT_RING(CP_PACKET0(RADEON_WAIT_UNTIL, 0));
 413         OUT_RING(RADEON_WAIT_3D_IDLECLEAN);
 414         OUT_RING(CP_PACKET0(R300_VAP_PVS_STATE_FLUSH_REG, 0));
 415         OUT_RING(0);
 416         ADVANCE_RING();
 417         /* set flush flag */
 418         dev_priv->track_flush |= RADEON_FLUSH_EMITED;
 419
 420         BEGIN_RING(3 + sz * 4);
 421         OUT_RING_REG(R300_VAP_PVS_UPLOAD_ADDRESS, addr);
 422         OUT_RING(CP_PACKET0_TABLE(R300_VAP_PVS_UPLOAD_DATA, sz * 4 - 1));
 423         OUT_RING_DRM_BUFFER(cmdbuf->buffer, sz * 4);
 424         ADVANCE_RING();
 425
 426         BEGIN_RING(2);
 427         OUT_RING(CP_PACKET0(R300_VAP_PVS_STATE_FLUSH_REG, 0));
 428         OUT_RING(0);
 429         ADVANCE_RING();
 430
 431         return 0;
 432 }
 433
 434 /**
 435  * Emit a clear packet from userspace.
 436  * Called by r300_emit_packet3.
 437  */
 438 static __inline__ int r300_emit_clear(drm_radeon_private_t *dev_priv,
 439                                       drm_radeon_kcmd_buffer_t *cmdbuf)
 440 {
 441         RING_LOCALS;
 442
 443         if (8 * 4 > drm_buffer_unprocessed(cmdbuf->buffer))
 444                 return -EINVAL;
 445
 446         BEGIN_RING(10);
 447         OUT_RING(CP_PACKET3(R200_3D_DRAW_IMMD_2, 8));
 448         OUT_RING(R300_PRIM_TYPE_POINT | R300_PRIM_WALK_RING |
 449                  (1 << R300_PRIM_NUM_VERTICES_SHIFT));
 450         OUT_RING_DRM_BUFFER(cmdbuf->buffer, 8);
 451         ADVANCE_RING();
 452
 453         BEGIN_RING(4);
 454         OUT_RING(CP_PACKET0(R300_RB3D_DSTCACHE_CTLSTAT, 0));
 455         OUT_RING(R300_RB3D_DC_FLUSH);
 456         OUT_RING(CP_PACKET0(RADEON_WAIT_UNTIL, 0));
 457         OUT_RING(RADEON_WAIT_3D_IDLECLEAN);
 458         ADVANCE_RING();
 459         /* set flush flag */
 460         dev_priv->track_flush |= RADEON_FLUSH_EMITED;
 461
 462         return 0;
 463 }
 464
 465 static __inline__ int r300_emit_3d_load_vbpntr(drm_radeon_private_t *dev_priv,
 466                                                drm_radeon_kcmd_buffer_t *cmdbuf,
 467                                                u32 header)
 468 {
 469         int count, i, k;
 470 #define MAX_ARRAY_PACKET  64
 471         u32 *data;
 472         u32 narrays;
 473         RING_LOCALS;
 474
 475         count = (header & RADEON_CP_PACKET_COUNT_MASK) >> 16;
 476
 477         if ((count + 1) > MAX_ARRAY_PACKET) {
 478                 DRM_ERROR("Too large payload in 3D_LOAD_VBPNTR (count=%d)\n",
 479                           count);
 480                 return -EINVAL;
 481         }
 482         /* carefully check packet contents */
 483
 484         /* We have already read the header so advance the buffer. */
 485         drm_buffer_advance(cmdbuf->buffer, 4);
 486
 487         narrays = *(u32 *)drm_buffer_pointer_to_dword(cmdbuf->buffer, 0);
 488         k = 0;
 489         i = 1;
 490         while ((k < narrays) && (i < (count + 1))) {
 491                 i++;            /* skip attribute field */
 492                 data = drm_buffer_pointer_to_dword(cmdbuf->buffer, i);
 493                 if (!radeon_check_offset(dev_priv, *data)) {
 494                         DRM_ERROR
 495                             ("Offset failed range check (k=%d i=%d) while processing 3D_LOAD_VBPNTR packet.\n",
 496                              k, i);
 497                         return -EINVAL;
 498                 }
 499                 k++;
 500                 i++;
 501                 if (k == narrays)
 502                         break;
 503                 /* have one more to process, they come in pairs */
 504                 data = drm_buffer_pointer_to_dword(cmdbuf->buffer, i);
 505                 if (!radeon_check_offset(dev_priv, *data)) {
 506                         DRM_ERROR
 507                             ("Offset failed range check (k=%d i=%d) while processing 3D_LOAD_VBPNTR packet.\n",
 508                              k, i);
 509                         return -EINVAL;
 510                 }
 511                 k++;
 512                 i++;
 513         }
 514         /* do the counts match what we expect ? */
 515         if ((k != narrays) || (i != (count + 1))) {
 516                 DRM_ERROR
 517                     ("Malformed 3D_LOAD_VBPNTR packet (k=%d i=%d narrays=%d count+1=%d).\n",
 518                      k, i, narrays, count + 1);
 519                 return -EINVAL;
 520         }
 521
 522         /* all clear, output packet */
 523
 524         BEGIN_RING(count + 2);
 525         OUT_RING(header);
 526         OUT_RING_DRM_BUFFER(cmdbuf->buffer, count + 1);
 527         ADVANCE_RING();
 528
 529         return 0;
 530 }
 531
 532 static __inline__ int r300_emit_bitblt_multi(drm_radeon_private_t *dev_priv,
 533                                              drm_radeon_kcmd_buffer_t *cmdbuf)
 534 {
 535         u32 *cmd = drm_buffer_pointer_to_dword(cmdbuf->buffer, 0);
 536         int count, ret;
 537         RING_LOCALS;
 538
 539
 540         count = (*cmd & RADEON_CP_PACKET_COUNT_MASK) >> 16;
 541
 542         if (*cmd & 0x8000) {
 543                 u32 offset;
 544                 u32 *cmd1 = drm_buffer_pointer_to_dword(cmdbuf->buffer, 1);
 545                 if (*cmd1 & (RADEON_GMC_SRC_PITCH_OFFSET_CNTL
 546                               | RADEON_GMC_DST_PITCH_OFFSET_CNTL)) {
 547
 548                         u32 *cmd2 = drm_buffer_pointer_to_dword(cmdbuf->buffer, 2);
 549                         offset = *cmd2 << 10;
 550                         ret = !radeon_check_offset(dev_priv, offset);
 551                         if (ret) {
 552                                 DRM_ERROR("Invalid bitblt first offset is %08X\n", offset);
 553                                 return -EINVAL;
 554                         }
 555                 }
 556
 557                 if ((*cmd1 & RADEON_GMC_SRC_PITCH_OFFSET_CNTL) &&
 558                     (*cmd1 & RADEON_GMC_DST_PITCH_OFFSET_CNTL)) {
 559                         u32 *cmd3 = drm_buffer_pointer_to_dword(cmdbuf->buffer, 3);
 560                         offset = *cmd3 << 10;
 561                         ret = !radeon_check_offset(dev_priv, offset);
 562                         if (ret) {
 563                                 DRM_ERROR("Invalid bitblt second offset is %08X\n", offset);
 564                                 return -EINVAL;
 565                         }
 566
 567                 }
 568         }
 569
 570         BEGIN_RING(count+2);
 571         OUT_RING_DRM_BUFFER(cmdbuf->buffer, count + 2);
 572         ADVANCE_RING();
 573
 574         return 0;
 575 }
 576
 577 static __inline__ int r300_emit_draw_indx_2(drm_radeon_private_t *dev_priv,
 578                                             drm_radeon_kcmd_buffer_t *cmdbuf)
 579 {
 580         u32 *cmd = drm_buffer_pointer_to_dword(cmdbuf->buffer, 0);
 581         u32 *cmd1 = drm_buffer_pointer_to_dword(cmdbuf->buffer, 1);
 582         int count;
 583         int expected_count;
 584         RING_LOCALS;
 585
 586         count = (*cmd & RADEON_CP_PACKET_COUNT_MASK) >> 16;
 587
 588         expected_count = *cmd1 >> 16;
 589         if (!(*cmd1 & R300_VAP_VF_CNTL__INDEX_SIZE_32bit))
 590                 expected_count = (expected_count+1)/2;
 591
 592         if (count && count != expected_count) {
 593                 DRM_ERROR("3D_DRAW_INDX_2: packet size %i, expected %i\n",
 594                         count, expected_count);
 595                 return -EINVAL;
 596         }
 597
 598         BEGIN_RING(count+2);
 599         OUT_RING_DRM_BUFFER(cmdbuf->buffer, count + 2);
 600         ADVANCE_RING();
 601
 602         if (!count) {
 603                 drm_r300_cmd_header_t stack_header, *header;
 604                 u32 *cmd1, *cmd2, *cmd3;
 605
 606                 if (drm_buffer_unprocessed(cmdbuf->buffer)
 607                                 < 4*4 + sizeof(stack_header)) {
 608                         DRM_ERROR("3D_DRAW_INDX_2: expect subsequent INDX_BUFFER, but stream is too short.\n");
 609                         return -EINVAL;
 610                 }
 611
 612                 header = drm_buffer_read_object(cmdbuf->buffer,
 613                                 sizeof(stack_header), &stack_header);
 614
 615                 cmd = drm_buffer_pointer_to_dword(cmdbuf->buffer, 0);
 616                 cmd1 = drm_buffer_pointer_to_dword(cmdbuf->buffer, 1);
 617                 cmd2 = drm_buffer_pointer_to_dword(cmdbuf->buffer, 2);
 618                 cmd3 = drm_buffer_pointer_to_dword(cmdbuf->buffer, 3);
 619
 620                 if (header->header.cmd_type != R300_CMD_PACKET3 ||
 621                     header->packet3.packet != R300_CMD_PACKET3_RAW ||
 622                     *cmd != CP_PACKET3(RADEON_CP_INDX_BUFFER, 2)) {
 623                         DRM_ERROR("3D_DRAW_INDX_2: expect subsequent INDX_BUFFER.\n");
 624                         return -EINVAL;
 625                 }
 626
 627                 if ((*cmd1 & 0x8000ffff) != 0x80000810) {
 628                         DRM_ERROR("Invalid indx_buffer reg address %08X\n",
 629                                         *cmd1);
 630                         return -EINVAL;
 631                 }
 632                 if (!radeon_check_offset(dev_priv, *cmd2)) {
 633                         DRM_ERROR("Invalid indx_buffer offset is %08X\n",
 634                                         *cmd2);
 635                         return -EINVAL;
 636                 }
 637                 if (*cmd3 != expected_count) {
 638                         DRM_ERROR("INDX_BUFFER: buffer size %i, expected %i\n",
 639                                 *cmd3, expected_count);
 640                         return -EINVAL;
 641                 }
 642
 643                 BEGIN_RING(4);
 644                 OUT_RING_DRM_BUFFER(cmdbuf->buffer, 4);
 645                 ADVANCE_RING();
 646         }
 647
 648         return 0;
 649 }
 650
 651 static __inline__ int r300_emit_raw_packet3(drm_radeon_private_t *dev_priv,
 652                                             drm_radeon_kcmd_buffer_t *cmdbuf)
 653 {
 654         u32 *header;
 655         int count;
 656         RING_LOCALS;
 657
 658         if (4 > drm_buffer_unprocessed(cmdbuf->buffer))
 659                 return -EINVAL;
 660
 661         /* Fixme !! This simply emits a packet without much checking.
 662            We need to be smarter. */
 663
 664         /* obtain first word - actual packet3 header */
 665         header = drm_buffer_pointer_to_dword(cmdbuf->buffer, 0);
 666
 667         /* Is it packet 3 ? */
 668         if ((*header >> 30) != 0x3) {
 669                 DRM_ERROR("Not a packet3 header (0x%08x)\n", *header);
 670                 return -EINVAL;
 671         }
 672
 673         count = (*header >> 16) & 0x3fff;
 674
 675         /* Check again now that we know how much data to expect */
 676         if ((count + 2) * 4 > drm_buffer_unprocessed(cmdbuf->buffer)) {
 677                 DRM_ERROR
 678                     ("Expected packet3 of length %d but have only %d bytes left\n",
 679                      (count + 2) * 4, drm_buffer_unprocessed(cmdbuf->buffer));
 680                 return -EINVAL;
 681         }
 682
 683         /* Is it a packet type we know about ? */
 684         switch (*header & 0xff00) {
 685         case RADEON_3D_LOAD_VBPNTR:     /* load vertex array pointers */
 686                 return r300_emit_3d_load_vbpntr(dev_priv, cmdbuf, *header);
 687
 688         case RADEON_CNTL_BITBLT_MULTI:
 689                 return r300_emit_bitblt_multi(dev_priv, cmdbuf);
 690
 691         case RADEON_CP_INDX_BUFFER:
 692                 DRM_ERROR("packet3 INDX_BUFFER without preceding 3D_DRAW_INDX_2 is illegal.\n");
 693                 return -EINVAL;
 694         case RADEON_CP_3D_DRAW_IMMD_2:
 695                 /* triggers drawing using in-packet vertex data */
 696         case RADEON_CP_3D_DRAW_VBUF_2:
 697                 /* triggers drawing of vertex buffers setup elsewhere */
 698                 dev_priv->track_flush &= ~(RADEON_FLUSH_EMITED |
 699                                            RADEON_PURGE_EMITED);
 700                 break;
 701         case RADEON_CP_3D_DRAW_INDX_2:
 702                 /* triggers drawing using indices to vertex buffer */
 703                 /* whenever we send vertex we clear flush & purge */
 704                 dev_priv->track_flush &= ~(RADEON_FLUSH_EMITED |
 705                                            RADEON_PURGE_EMITED);
 706                 return r300_emit_draw_indx_2(dev_priv, cmdbuf);
 707         case RADEON_WAIT_FOR_IDLE:
 708         case RADEON_CP_NOP:
 709                 /* these packets are safe */
 710                 break;
 711         default:
 712                 DRM_ERROR("Unknown packet3 header (0x%08x)\n", *header);
 713                 return -EINVAL;
 714         }
 715
 716         BEGIN_RING(count + 2);
 717         OUT_RING_DRM_BUFFER(cmdbuf->buffer, count + 2);
 718         ADVANCE_RING();
 719
 720         return 0;
 721 }
 722
 723 /**
 724  * Emit a rendering packet3 from userspace.
 725  * Called by r300_do_cp_cmdbuf.
 726  */
 727 static __inline__ int r300_emit_packet3(drm_radeon_private_t *dev_priv,
 728                                         drm_radeon_kcmd_buffer_t *cmdbuf,
 729                                         drm_r300_cmd_header_t header)
 730 {
 731         int n;
 732         int ret;
 733         int orig_iter = cmdbuf->buffer->iterator;
 734
 735         /* This is a do-while-loop so that we run the interior at least once,
 736          * even if cmdbuf->nbox is 0. Compare r300_emit_cliprects for rationale.
 737          */
 738         n = 0;
 739         do {
 740                 if (cmdbuf->nbox > R300_SIMULTANEOUS_CLIPRECTS) {
 741                         ret = r300_emit_cliprects(dev_priv, cmdbuf, n);
 742                         if (ret)
 743                                 return ret;
 744
 745                         cmdbuf->buffer->iterator = orig_iter;
 746                 }
 747
 748                 switch (header.packet3.packet) {
 749                 case R300_CMD_PACKET3_CLEAR:
 750                         DRM_DEBUG("R300_CMD_PACKET3_CLEAR\n");
 751                         ret = r300_emit_clear(dev_priv, cmdbuf);
 752                         if (ret) {
 753                                 DRM_ERROR("r300_emit_clear failed\n");
 754                                 return ret;
 755                         }
 756                         break;
 757
 758                 case R300_CMD_PACKET3_RAW:
 759                         DRM_DEBUG("R300_CMD_PACKET3_RAW\n");
 760                         ret = r300_emit_raw_packet3(dev_priv, cmdbuf);
 761                         if (ret) {
 762                                 DRM_ERROR("r300_emit_raw_packet3 failed\n");
 763                                 return ret;
 764                         }
 765                         break;
 766
 767                 default:
 768                         DRM_ERROR("bad packet3 type %i at byte %d\n",
 769                                   header.packet3.packet,
 770                                   cmdbuf->buffer->iterator - (int)sizeof(header));
 771                         return -EINVAL;
 772                 }
 773
 774                 n += R300_SIMULTANEOUS_CLIPRECTS;
 775         } while (n < cmdbuf->nbox);
 776
 777         return 0;
 778 }
 779
 780 /* Some of the R300 chips seem to be extremely touchy about the two registers
 781  * that are configured in r300_pacify.
 782  * Among the worst offenders seems to be the R300 ND (0x4E44): When userspace
 783  * sends a command buffer that contains only state setting commands and a
 784  * vertex program/parameter upload sequence, this will eventually lead to a
 785  * lockup, unless the sequence is bracketed by calls to r300_pacify.
 786  * So we should take great care to *always* call r300_pacify before
 787  * *anything* 3D related, and again afterwards. This is what the
 788  * call bracket in r300_do_cp_cmdbuf is for.
 789  */
 790
 791 /**
 792  * Emit the sequence to pacify R300.
 793  */
 794 static void r300_pacify(drm_radeon_private_t *dev_priv)
 795 {
 796         uint32_t cache_z, cache_3d, cache_2d;
 797         RING_LOCALS;
 798
 799         cache_z = R300_ZC_FLUSH;
 800         cache_2d = R300_RB2D_DC_FLUSH;
 801         cache_3d = R300_RB3D_DC_FLUSH;
 802         if (!(dev_priv->track_flush & RADEON_PURGE_EMITED)) {
 803                 /* we can purge, primitive where draw since last purge */
 804                 cache_z |= R300_ZC_FREE;
 805                 cache_2d |= R300_RB2D_DC_FREE;
 806                 cache_3d |= R300_RB3D_DC_FREE;
 807         }
 808
 809         /* flush & purge zbuffer */
 810         BEGIN_RING(2);
 811         OUT_RING(CP_PACKET0(R300_ZB_ZCACHE_CTLSTAT, 0));
 812         OUT_RING(cache_z);
 813         ADVANCE_RING();
 814         /* flush & purge 3d */
 815         BEGIN_RING(2);
 816         OUT_RING(CP_PACKET0(R300_RB3D_DSTCACHE_CTLSTAT, 0));
 817         OUT_RING(cache_3d);
 818         ADVANCE_RING();
 819         /* flush & purge texture */
 820         BEGIN_RING(2);
 821         OUT_RING(CP_PACKET0(R300_TX_INVALTAGS, 0));
 822         OUT_RING(0);
 823         ADVANCE_RING();
 824         /* FIXME: is this one really needed ? */
 825         BEGIN_RING(2);
 826         OUT_RING(CP_PACKET0(R300_RB3D_AARESOLVE_CTL, 0));
 827         OUT_RING(0);
 828         ADVANCE_RING();
 829         BEGIN_RING(2);
 830         OUT_RING(CP_PACKET0(RADEON_WAIT_UNTIL, 0));
 831         OUT_RING(RADEON_WAIT_3D_IDLECLEAN);
 832         ADVANCE_RING();
 833         /* flush & purge 2d through E2 as RB2D will trigger lockup */
 834         BEGIN_RING(4);
 835         OUT_RING(CP_PACKET0(R300_DSTCACHE_CTLSTAT, 0));
 836         OUT_RING(cache_2d);
 837         OUT_RING(CP_PACKET0(RADEON_WAIT_UNTIL, 0));
 838         OUT_RING(RADEON_WAIT_2D_IDLECLEAN |
 839                  RADEON_WAIT_HOST_IDLECLEAN);
 840         ADVANCE_RING();
 841         /* set flush & purge flags */
 842         dev_priv->track_flush |= RADEON_FLUSH_EMITED | RADEON_PURGE_EMITED;
 843 }
 844
 845 /**
 846  * Called by r300_do_cp_cmdbuf to update the internal buffer age and state.
 847  * The actual age emit is done by r300_do_cp_cmdbuf, which is why you must
 848  * be careful about how this function is called.
 849  */
 850 static void r300_discard_buffer(struct drm_device *dev, struct drm_master *master, struct drm_buf *buf)
 851 {
 852         drm_radeon_buf_priv_t *buf_priv = buf->dev_private;
 853         struct drm_radeon_master_private *master_priv = master->driver_priv;
 854
 855         buf_priv->age = ++master_priv->sarea_priv->last_dispatch;
 856         buf->pending = 1;
 857         buf->used = 0;
 858 }
 859
 860 static void r300_cmd_wait(drm_radeon_private_t * dev_priv,
 861                           drm_r300_cmd_header_t header)
 862 {
 863         u32 wait_until;
 864         RING_LOCALS;
 865
 866         if (!header.wait.flags)
 867                 return;
 868
 869         wait_until = 0;
 870
 871         switch(header.wait.flags) {
 872         case R300_WAIT_2D:
 873                 wait_until = RADEON_WAIT_2D_IDLE;
 874                 break;
 875         case R300_WAIT_3D:
 876                 wait_until = RADEON_WAIT_3D_IDLE;
 877                 break;
 878         case R300_NEW_WAIT_2D_3D:
 879                 wait_until = RADEON_WAIT_2D_IDLE|RADEON_WAIT_3D_IDLE;
 880                 break;
 881         case R300_NEW_WAIT_2D_2D_CLEAN:
 882                 wait_until = RADEON_WAIT_2D_IDLE|RADEON_WAIT_2D_IDLECLEAN;
 883                 break;
 884         case R300_NEW_WAIT_3D_3D_CLEAN:
 885                 wait_until = RADEON_WAIT_3D_IDLE|RADEON_WAIT_3D_IDLECLEAN;
 886                 break;
 887         case R300_NEW_WAIT_2D_2D_CLEAN_3D_3D_CLEAN:
 888                 wait_until = RADEON_WAIT_2D_IDLE|RADEON_WAIT_2D_IDLECLEAN;
 889                 wait_until |= RADEON_WAIT_3D_IDLE|RADEON_WAIT_3D_IDLECLEAN;
 890                 break;
 891         default:
 892                 return;
 893         }
 894
 895         BEGIN_RING(2);
 896         OUT_RING(CP_PACKET0(RADEON_WAIT_UNTIL, 0));
 897         OUT_RING(wait_until);
 898         ADVANCE_RING();
 899 }
 900
 901 static int r300_scratch(drm_radeon_private_t *dev_priv,
 902                         drm_radeon_kcmd_buffer_t *cmdbuf,
 903                         drm_r300_cmd_header_t header)
 904 {
 905         u32 *ref_age_base;
 906         u32 i, *buf_idx, h_pending;
 907         u64 *ptr_addr;
 908         u64 stack_ptr_addr;
 909         RING_LOCALS;
 910
 911         if (drm_buffer_unprocessed(cmdbuf->buffer) <
 912             (sizeof(u64) + header.scratch.n_bufs * sizeof(*buf_idx))) {
 913                 return -EINVAL;
 914         }
 915
 916         if (header.scratch.reg >= 5) {
 917                 return -EINVAL;
 918         }
 919
 920         dev_priv->scratch_ages[header.scratch.reg]++;
 921
 922         ptr_addr = drm_buffer_read_object(cmdbuf->buffer,
 923                         sizeof(stack_ptr_addr), &stack_ptr_addr);
 924         ref_age_base = (u32 *)(unsigned long)get_unaligned(ptr_addr);
 925
 926         for (i=0; i < header.scratch.n_bufs; i++) {
 927                 buf_idx = drm_buffer_pointer_to_dword(cmdbuf->buffer, 0);
 928                 *buf_idx *= 2; /* 8 bytes per buf */
 929
 930                 if (DRM_COPY_TO_USER(ref_age_base + *buf_idx,
 931                                 &dev_priv->scratch_ages[header.scratch.reg],
 932                                 sizeof(u32)))
 933                         return -EINVAL;
 934
 935                 if (DRM_COPY_FROM_USER(&h_pending,
 936                                 ref_age_base + *buf_idx + 1,
 937                                 sizeof(u32)))
 938                         return -EINVAL;
 939
 940                 if (h_pending == 0)
 941                         return -EINVAL;
 942
 943                 h_pending--;
 944
 945                 if (DRM_COPY_TO_USER(ref_age_base + *buf_idx + 1,
 946                                         &h_pending,
 947                                         sizeof(u32)))
 948                         return -EINVAL;
 949
 950                 drm_buffer_advance(cmdbuf->buffer, sizeof(*buf_idx));
 951         }
 952
 953         BEGIN_RING(2);
 954         OUT_RING( CP_PACKET0( RADEON_SCRATCH_REG0 + header.scratch.reg * 4, 0 ) );
 955         OUT_RING( dev_priv->scratch_ages[header.scratch.reg] );
 956         ADVANCE_RING();
 957
 958         return 0;
 959 }
 960
 961 /**
 962  * Uploads user-supplied vertex program instructions or parameters onto
 963  * the graphics card.
 964  * Called by r300_do_cp_cmdbuf.
 965  */
 966 static inline int r300_emit_r500fp(drm_radeon_private_t *dev_priv,
 967                                        drm_radeon_kcmd_buffer_t *cmdbuf,
 968                                        drm_r300_cmd_header_t header)
 969 {
 970         int sz;
 971         int addr;
 972         int type;
 973         int isclamp;
 974         int stride;
 975         RING_LOCALS;
 976
 977         sz = header.r500fp.count;
 978         /* address is 9 bits 0 - 8, bit 1 of flags is part of address */
 979         addr = ((header.r500fp.adrhi_flags & 1) << 8) | header.r500fp.adrlo;
 980
 981         type = !!(header.r500fp.adrhi_flags & R500FP_CONSTANT_TYPE);
 982         isclamp = !!(header.r500fp.adrhi_flags & R500FP_CONSTANT_CLAMP);
 983
 984         addr |= (type << 16);
 985         addr |= (isclamp << 17);
 986
 987         stride = type ? 4 : 6;
 988
 989         DRM_DEBUG("r500fp %d %d type: %d\n", sz, addr, type);
 990         if (!sz)
 991                 return 0;
 992         if (sz * stride * 4 > drm_buffer_unprocessed(cmdbuf->buffer))
 993                 return -EINVAL;
 994
 995         BEGIN_RING(3 + sz * stride);
 996         OUT_RING_REG(R500_GA_US_VECTOR_INDEX, addr);
 997         OUT_RING(CP_PACKET0_TABLE(R500_GA_US_VECTOR_DATA, sz * stride - 1));
 998         OUT_RING_DRM_BUFFER(cmdbuf->buffer, sz * stride);
 999
1000         ADVANCE_RING();
1001
1002         return 0;
1003 }
1004
1005
1006 /**
1007  * Parses and validates a user-supplied command buffer and emits appropriate
1008  * commands on the DMA ring buffer.
1009  * Called by the ioctl handler function radeon_cp_cmdbuf.
1010  */
1011 int r300_do_cp_cmdbuf(struct drm_device *dev,
1012                       struct drm_file *file_priv,
1013                       drm_radeon_kcmd_buffer_t *cmdbuf)
1014 {
1015         drm_radeon_private_t *dev_priv = dev->dev_private;
1016         struct drm_radeon_master_private *master_priv = file_priv->master->driver_priv;
1017         struct drm_device_dma *dma = dev->dma;
1018         struct drm_buf *buf = NULL;
1019         int emit_dispatch_age = 0;
1020         int ret = 0;
1021
1022         DRM_DEBUG("\n");
1023
1024         /* pacify */
1025         r300_pacify(dev_priv);
1026
1027         if (cmdbuf->nbox <= R300_SIMULTANEOUS_CLIPRECTS) {
1028                 ret = r300_emit_cliprects(dev_priv, cmdbuf, 0);
1029                 if (ret)
1030                         goto cleanup;
1031         }
1032
1033         while (drm_buffer_unprocessed(cmdbuf->buffer)
1034                         >= sizeof(drm_r300_cmd_header_t)) {
1035                 int idx;
1036                 drm_r300_cmd_header_t *header, stack_header;
1037
1038                 header = drm_buffer_read_object(cmdbuf->buffer,
1039                                 sizeof(stack_header), &stack_header);
1040
1041                 switch (header->header.cmd_type) {
1042                 case R300_CMD_PACKET0:
1043                         DRM_DEBUG("R300_CMD_PACKET0\n");
1044                         ret = r300_emit_packet0(dev_priv, cmdbuf, *header);
1045                         if (ret) {
1046                                 DRM_ERROR("r300_emit_packet0 failed\n");
1047                                 goto cleanup;
1048                         }
1049                         break;
1050
1051                 case R300_CMD_VPU:
1052                         DRM_DEBUG("R300_CMD_VPU\n");
1053                         ret = r300_emit_vpu(dev_priv, cmdbuf, *header);
1054                         if (ret) {
1055                                 DRM_ERROR("r300_emit_vpu failed\n");
1056                                 goto cleanup;
1057                         }
1058                         break;
1059
1060                 case R300_CMD_PACKET3:
1061                         DRM_DEBUG("R300_CMD_PACKET3\n");
1062                         ret = r300_emit_packet3(dev_priv, cmdbuf, *header);
1063                         if (ret) {
1064                                 DRM_ERROR("r300_emit_packet3 failed\n");
1065                                 goto cleanup;
1066                         }
1067                         break;
1068
1069                 case R300_CMD_END3D:
1070                         DRM_DEBUG("R300_CMD_END3D\n");
1071                         /* TODO:
1072                            Ideally userspace driver should not need to issue this call,
1073                            i.e. the drm driver should issue it automatically and prevent
1074                            lockups.
1075
1076                            In practice, we do not understand why this call is needed and what
1077                            it does (except for some vague guesses that it has to do with cache
1078                            coherence) and so the user space driver does it.
1079
1080                            Once we are sure which uses prevent lockups the code could be moved
1081                            into the kernel and the userspace driver will not
1082                            need to use this command.
1083
1084                            Note that issuing this command does not hurt anything
1085                            except, possibly, performance */
1086                         r300_pacify(dev_priv);
1087                         break;
1088
1089                 case R300_CMD_CP_DELAY:
1090                         /* simple enough, we can do it here */
1091                         DRM_DEBUG("R300_CMD_CP_DELAY\n");
1092                         {
1093                                 int i;
1094                                 RING_LOCALS;
1095
1096                                 BEGIN_RING(header->delay.count);
1097                                 for (i = 0; i < header->delay.count; i++)
1098                                         OUT_RING(RADEON_CP_PACKET2);
1099                                 ADVANCE_RING();
1100                         }
1101                         break;
1102
1103                 case R300_CMD_DMA_DISCARD:
1104                         DRM_DEBUG("RADEON_CMD_DMA_DISCARD\n");
1105                         idx = header->dma.buf_idx;
1106                         if (idx < 0 || idx >= dma->buf_count) {
1107                                 DRM_ERROR("buffer index %d (of %d max)\n",
1108                                           idx, dma->buf_count - 1);
1109                                 ret = -EINVAL;
1110                                 goto cleanup;
1111                         }
1112
1113                         buf = dma->buflist[idx];
1114                         if (buf->file_priv != file_priv || buf->pending) {
1115                                 DRM_ERROR("bad buffer %p %p %d\n",
1116                                           buf->file_priv, file_priv,
1117                                           buf->pending);
1118                                 ret = -EINVAL;
1119                                 goto cleanup;
1120                         }
1121
1122                         emit_dispatch_age = 1;
1123                         r300_discard_buffer(dev, file_priv->master, buf);
1124                         break;
1125
1126                 case R300_CMD_WAIT:
1127                         DRM_DEBUG("R300_CMD_WAIT\n");
1128                         r300_cmd_wait(dev_priv, *header);
1129                         break;
1130
1131                 case R300_CMD_SCRATCH:
1132                         DRM_DEBUG("R300_CMD_SCRATCH\n");
1133                         ret = r300_scratch(dev_priv, cmdbuf, *header);
1134                         if (ret) {
1135                                 DRM_ERROR("r300_scratch failed\n");
1136                                 goto cleanup;
1137                         }
1138                         break;
1139
1140                 case R300_CMD_R500FP:
1141                         if ((dev_priv->flags & RADEON_FAMILY_MASK) < CHIP_RV515) {
1142                                 DRM_ERROR("Calling r500 command on r300 card\n");
1143                                 ret = -EINVAL;
1144                                 goto cleanup;
1145                         }
1146                         DRM_DEBUG("R300_CMD_R500FP\n");
1147                         ret = r300_emit_r500fp(dev_priv, cmdbuf, *header);
1148                         if (ret) {
1149                                 DRM_ERROR("r300_emit_r500fp failed\n");
1150                                 goto cleanup;
1151                         }
1152                         break;
1153                 default:
1154                         DRM_ERROR("bad cmd_type %i at byte %d\n",
1155                                   header->header.cmd_type,
1156                                   cmdbuf->buffer->iterator - (int)sizeof(*header));
1157                         ret = -EINVAL;
1158                         goto cleanup;
1159                 }
1160         }
1161
1162         DRM_DEBUG("END\n");
1163
1164       cleanup:
1165         r300_pacify(dev_priv);
1166
1167         /* We emit the vertex buffer age here, outside the pacifier "brackets"
1168          * for two reasons:
1169          *  (1) This may coalesce multiple age emissions into a single one and
1170          *  (2) more importantly, some chips lock up hard when scratch registers
1171          *      are written inside the pacifier bracket.
1172          */
1173         if (emit_dispatch_age) {
1174                 RING_LOCALS;
1175
1176                 /* Emit the vertex buffer age */
1177                 BEGIN_RING(2);
1178                 RADEON_DISPATCH_AGE(master_priv->sarea_priv->last_dispatch);
1179                 ADVANCE_RING();
1180         }
1181
1182         COMMIT_RING();
1183
1184         return ret;
1185 }